@import"https://fonts.googleapis.com/css2?family=Outfit:wght@500;600;700&family=Work+Sans:wght@400;500;600;700&display=swap";.aqua-connect{min-height:100dvh;padding:32px 20px 48px;background:#fbfaf6;color:#0b1d3a;display:flex;flex-direction:column;align-items:center;font-family:var(--font-body)}.aqua-connect__brand{display:flex;align-items:center;gap:9px;color:inherit;text-decoration:none;font:700 25px var(--font-display)}.aqua-connect__brand img{width:30px;height:34px;object-fit:contain}.aqua-connect__card{width:min(100%,440px);margin-top:28px;padding:28px;border:1px solid #e2e8eb;border-radius:24px;background:#fff}.aqua-connect__mascot{display:block;width:88px;height:88px;object-fit:contain;margin:0 auto 16px}.aqua-connect__eyebrow{font-size:10px!important;letter-spacing:.12em;font-weight:600;color:#267dc2!important}.aqua-connect h1{margin:12px 0;font:600 32px/1.1 var(--font-display);letter-spacing:-.035em}.aqua-connect p{font-size:14px;line-height:1.6;color:#64748b}.aqua-connect form{display:grid;gap:16px;margin-top:20px}.aqua-connect label{display:grid;gap:7px;font-size:13px;font-weight:600}.aqua-connect input{width:100%;min-height:48px;padding:0 13px;border:1px solid #dce6ee;border-radius:12px;background:#fbfcfd;font:inherit;color:#0b1d3a}.aqua-connect__primary{display:flex;width:100%;align-items:center;justify-content:space-between;gap:12px;min-height:50px;margin-top:18px;padding:12px 17px;border:0;border-radius:14px;background:#0b1d3a;color:#fff;font:600 14px var(--font-body);cursor:pointer}.aqua-connect__primary:hover{background:#17365f}.aqua-connect__primary:active{transform:scale(.985)}.aqua-connect__primary:disabled{opacity:.55;cursor:wait}.aqua-connect__text{display:block;width:max-content;max-width:100%;min-height:44px;margin:7px auto 0;padding:12px 0;border:0;background:none;color:#267dc2;text-decoration:none;font:500 13px var(--font-body);cursor:pointer}.aqua-connect__identity{display:flex;align-items:center;gap:12px;margin:22px 0;padding:16px;border:1px solid #e2e8eb;border-radius:14px}.aqua-connect__identity>span{display:grid;place-items:center;width:42px;height:42px;flex:0 0 42px;border-radius:50%;background:#e8f6ff;font-weight:700}.aqua-connect__identity div{display:grid;gap:4px;min-width:0}.aqua-connect__identity strong{font-size:14px}.aqua-connect__identity small{font-size:12px;color:#64748b;overflow-wrap:anywhere}.aqua-connect__error{padding:12px;background:#fff1ef;border-radius:12px;color:#a33625!important}.aqua-connect__note{margin:15px 0 0;padding-top:15px;border-top:1px solid #e2e8eb;font-size:11px!important}.aqua-connect :focus-visible{outline:3px solid #267dc2;outline-offset:3px}@media(max-width:480px){.aqua-connect{padding:24px 16px}.aqua-connect__card{padding:24px;margin-top:20px}}@media(prefers-reduced-motion:reduce){.aqua-connect__primary:active{transform:none}}.aqua-memo-top-trigger{position:relative;display:inline-flex;flex:0 0 auto;align-items:center;justify-content:center;gap:7px;min-width:88px;min-height:40px;padding:0 13px;border:1px solid #d8eaf7;border-radius:999px;background:#fff;color:#176fbe;font:750 12px/1 var(--font-body);white-space:nowrap;cursor:pointer;transition:background .16s,border-color .16s,transform .16s}.aqua-memo-top-trigger:after{content:"";position:absolute;top:5px;right:6px;width:6px;height:6px;border:2px solid #fff;border-radius:50%;background:#1889ed}.aqua-memo-top-trigger:hover,.aqua-memo-top-trigger.is-open{border-color:#bcdff7;background:#edf7ff}.aqua-memo-top-trigger:active{transform:scale(.97)}.aqua-memo-editor{position:fixed;z-index:1080;top:68px;right:22px;display:flex;flex-direction:column;width:min(494px,calc(100vw - 24px));max-height:calc(100dvh - 84px);overflow:hidden;border:1px solid #c9e1f3;border-radius:19px;background:#fff;color:#102c57;box-shadow:0 18px 50px #1a487729,0 3px 10px #1a48770d;animation:aqua-memo-in .2s cubic-bezier(.2,.8,.2,1) both}.aqua-memo-editor:before{content:"";position:absolute;top:-7px;right:365px;width:13px;height:13px;border-top:1px solid #c9e1f3;border-left:1px solid #c9e1f3;background:#fff;transform:rotate(45deg)}.aqua-memo-editor>header{display:flex;align-items:flex-start;justify-content:space-between;padding:18px 19px 14px}.aqua-memo-brand{display:flex;align-items:center;gap:12px}.aqua-memo-brand>span{display:grid;place-items:center;width:47px;height:47px;border-radius:13px;background:#eaf5ff;color:#1687dc}.aqua-memo-brand h2{margin:0;font:800 18px/1.15 var(--font-display);letter-spacing:-.025em}.aqua-memo-brand p{margin:4px 0 0;color:#6681a2;font-size:11px}.aqua-memo-close,.saved-memos header button{display:grid;place-items:center;width:38px;height:38px;border:0;border-radius:50%;background:transparent;color:#173a6d}.aqua-memo-close:hover,.saved-memos header button:hover{background:#edf7ff}.aqua-memo-title-field{display:flex;align-items:center;gap:8px;margin:0 19px;border:1px solid #cfe3f4;border-radius:10px;padding:0 12px}.aqua-memo-title-field input{min-width:0;flex:1;height:46px;border:0;outline:0;background:transparent;color:#102c57;font:750 15px var(--font-body)}.aqua-memo-title-field input::placeholder{color:#8297b1}.aqua-memo-title-field svg{color:#5279ac}.aqua-memo-status{display:flex;align-items:center;justify-content:space-between;min-height:42px;padding:0 21px;color:#56759a;font-size:10px}.aqua-memo-status span{display:flex;align-items:center;gap:6px}.aqua-memo-status svg{color:#0bb77c}.aqua-memo-status.is-dirty svg,.aqua-memo-status.is-error svg{color:#d58b39}.aqua-memo-status small{color:#6380a2}.aqua-memo-content{position:relative;display:flex;min-height:210px;margin:0 19px;border:1px solid #d6e7f4;border-radius:11px;background:linear-gradient(145deg,#fff,#f5faff)}.aqua-memo-content textarea{min-height:250px;max-height:44dvh;flex:1;resize:none;border:0;outline:0;padding:15px 15px 34px;background:transparent;color:#17365f;font:13px/1.65 var(--font-body)}.aqua-memo-content textarea::placeholder{color:#8ca0b5}.aqua-memo-content small{position:absolute;right:12px;bottom:9px;color:#6c83a4;font-size:9px}.aqua-memo-error{margin:8px 20px 0;color:#b34040;font-size:10px}.aqua-memo-editor>footer{display:grid;grid-template-columns:1fr 1fr;gap:13px;padding:16px 19px 18px}.aqua-memo-editor>footer button{display:flex;align-items:center;justify-content:center;gap:7px;min-height:44px;border-radius:10px;font:750 12px var(--font-body)}.aqua-memo-new{border:1px solid #c8e0f4;background:#f5faff;color:#087bdd}.aqua-memo-save{border:1px solid #1389f3;background:#1389f3;color:#fff;box-shadow:0 6px 14px #1389f329}.aqua-memo-save:disabled{opacity:.58}.aqua-memo-confirm{position:absolute;z-index:3;right:18px;bottom:70px;left:18px;display:flex;align-items:center;justify-content:space-between;gap:14px;padding:12px 14px;border:1px solid #cfe2f1;border-radius:12px;background:#fff;box-shadow:0 10px 30px #15396029;font-size:11px}.aqua-memo-confirm>div{display:flex;gap:6px}.aqua-memo-confirm button,.saved-memos__confirm button{min-height:34px;padding:0 10px;border:1px solid #d7e5ef;border-radius:8px;background:#fff;color:#375979;font:700 10px var(--font-body)}.aqua-memo-confirm button.is-primary{border-color:#1687ed;background:#1687ed;color:#fff}.aqua-memo-launcher{position:fixed;z-index:1001;right:31px;bottom:94px;display:grid;place-items:center;width:46px;height:46px;padding:0;border:1px solid #d7ebfa;border-radius:50%;background:#fafdff;color:#1389ed;box-shadow:0 8px 22px #18539a24;cursor:pointer;transition:transform .17s,box-shadow .17s,border-color .17s}.aqua-memo-launcher:hover{border-color:#b9ddf6;box-shadow:0 11px 25px #18539a33;transform:translateY(-1px)}.aqua-memo-launcher i{position:absolute;top:-2px;right:-2px;width:9px;height:9px;border:2px solid #fff;border-radius:50%;background:#1689ef}.aqua-memo-launcher.is-open{background:#eaf5ff}.saved-memos{position:fixed;z-index:1070;right:86px;bottom:88px;width:min(294px,calc(100vw - 92px));max-height:min(430px,calc(100dvh - 120px));overflow:hidden;border:1px solid #c9e1f3;border-radius:16px;background:#fff;color:#102c57;box-shadow:0 16px 42px #17427026;animation:saved-memos-in .18s cubic-bezier(.2,.8,.2,1) both}.saved-memos:after{content:"";position:absolute;right:-7px;bottom:22px;width:13px;height:13px;border-top:1px solid #c9e1f3;border-right:1px solid #c9e1f3;background:#fff;transform:rotate(45deg)}.saved-memos>header{display:flex;align-items:center;justify-content:space-between;padding:13px 13px 9px 16px}.saved-memos h2{margin:0;font:800 15px var(--font-display)}.saved-memos__body{display:grid;gap:6px;max-height:355px;overflow-y:auto;padding:4px 11px 13px;overscroll-behavior:contain}.saved-memo-row{position:relative;display:flex;border:1px solid #e0ebf4;border-radius:10px;background:#fff}.saved-memo-row:hover{background:#f4f9fe}.saved-memo-row__open{display:grid;grid-template-columns:27px minmax(0,1fr) 12px;align-items:center;gap:7px;min-width:0;flex:1;padding:10px;border:0;background:transparent;color:#147fdc;text-align:left}.saved-memo-row__open>span{display:grid;min-width:0;gap:3px}.saved-memo-row__open strong{overflow:hidden;color:#102c57;font-size:11px;text-overflow:ellipsis;white-space:nowrap}.saved-memo-row__open small{color:#6c83a4;font-size:9px}.saved-memo-row__open b{font-size:20px;font-weight:400}.saved-memo-row__menu{align-self:center;width:34px;height:34px;margin-right:4px;border:0;border-radius:8px;background:transparent;color:#6681a2}.saved-memo-row__menu:hover{background:#e9f4fd}.saved-memo-menu{position:absolute;z-index:4;right:4px;top:41px;display:grid;width:104px;padding:5px;border:1px solid #d6e5f0;border-radius:9px;background:#fff;box-shadow:0 9px 24px #12395f29}.saved-memo-menu button{display:flex;align-items:center;gap:7px;min-height:33px;padding:0 8px;border:0;border-radius:6px;background:#fff;color:#315574;font:650 10px var(--font-body)}.saved-memo-menu button:hover{background:#f0f7fc}.saved-memo-menu button.is-delete{color:#b34040}.saved-memos__empty,.saved-memos__state{display:grid;justify-items:center;gap:7px;padding:26px 14px;color:#1888e7;text-align:center}.saved-memos__empty strong{color:#17365f;font-size:12px}.saved-memos__empty p,.saved-memos__state{margin:0;color:#7088a4;font-size:10px;line-height:1.45}.saved-memos__error{margin:4px;color:#b34040;font-size:10px}.saved-memos__confirm{position:absolute;z-index:5;inset:auto 10px 10px;padding:13px;border:1px solid #e7caca;border-radius:11px;background:#fff;box-shadow:0 10px 28px #39161629}.saved-memos__confirm strong{font-size:11px}.saved-memos__confirm p{margin:3px 0 10px;color:#70829a;font-size:9px}.saved-memos__confirm>div{display:flex;justify-content:flex-end;gap:6px}.saved-memos__confirm button.is-delete{border-color:#c84b4b;background:#c84b4b;color:#fff}@keyframes aqua-memo-in{0%{opacity:0;transform:translateY(-4px)}}@keyframes saved-memos-in{0%{opacity:0;transform:scale(.98)}}@media(max-width:980px){.aqua-memo-editor{top:118px}.aqua-memo-top-trigger{min-width:42px;width:42px;padding:0}.aqua-memo-top-trigger span{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}.aqua-memo-editor:before{display:none}}@media(max-width:640px){.aqua-memo-editor{top:auto;right:8px;bottom:8px;width:calc(100vw - 16px);max-height:calc(100dvh - 16px);border-radius:20px}.aqua-memo-content textarea{min-height:210px;max-height:38dvh}.aqua-memo-launcher{right:19px;bottom:82px}.saved-memos{right:70px;bottom:76px;width:min(294px,calc(100vw - 82px))}.aqua-memo-confirm{display:grid}.aqua-memo-confirm>div{justify-content:flex-end}}@media(prefers-reduced-motion:reduce){.aqua-memo-editor,.saved-memos,.aqua-memo-launcher,.aqua-memo-top-trigger{animation:none;transition-duration:.01ms!important}}body:has(.aqua-chat--open) .aqua-memo-launcher{opacity:0;pointer-events:none}.aqua-scene{position:absolute;inset:0;--pointer-x: 50%;--pointer-y: 50%}.aqua-scene .scene-orbit{position:absolute;left:50%;top:49%;width:min(55vw,620px);aspect-ratio:1;border:1px solid rgba(93,183,255,.12);border-radius:50%;transform:translate(-50%,-50%)}.aqua-scene .character-position{position:absolute;z-index:3;left:50%;top:48%;width:clamp(330px,35vw,520px);aspect-ratio:1;translate:-50% -50%;transform-origin:center 70%;will-change:transform}.aqua-scene .character-float{width:100%;height:100%;transform-origin:center 74%}.aqua-scene .character-float--enabled{animation:aqua-master-float var(--float-duration) var(--ease-in-out) infinite}.aqua-scene .character-lean{position:relative;width:100%;height:100%;transform-origin:center 76%;will-change:transform}.aqua-scene .aqua-layer{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;-webkit-user-select:none;user-select:none;pointer-events:none}.aqua-scene .aqua-base-layer{filter:drop-shadow(0 24px 18px rgba(36,133,204,.17))}.aqua-scene .eye-mask{position:absolute;z-index:3;inset:0;pointer-events:none}.aqua-scene .eye-mask img{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;will-change:transform}.aqua-scene .eye-mask--left{clip-path:ellipse(3.3% 6% at 40.8% 49%)}.aqua-scene .eye-mask--right{clip-path:ellipse(3.2% 6% at 63% 50.1%)}.aqua-scene .eyelid{position:absolute;z-index:4;width:6.7%;height:12.2%;border-radius:50%;background:linear-gradient(180deg,#63bcf7,#59b4f3);transform:scaleY(0);transform-origin:top;pointer-events:none}.aqua-scene .eyelid--left{left:37.5%;top:43%}.aqua-scene .eyelid--right{left:59.7%;top:44.1%}.aqua-scene .eyelid--blink{animation:aqua-master-blink var(--blink-duration) var(--ease-in-out) both}.aqua-scene .aqua-platform{position:absolute;z-index:2;left:50%;bottom:8%;width:42%;height:9%;translate:-50% 0;border-radius:50%;background:linear-gradient(180deg,#fff,#dceaff);box-shadow:0 18px 28px #3680dc38;transform-origin:center}.aqua-scene .aqua-platform span{position:absolute;inset:0;border:1px solid rgba(255,255,255,.9);border-radius:inherit;transform:translateY(-12%)}@keyframes aqua-master-float{0%,to{transform:translateY(0) rotate(calc(var(--float-rotation) * -1))}50%{transform:translateY(calc(var(--float-y) * -1)) rotate(var(--float-rotation))}}@keyframes aqua-master-blink{0%,to{transform:scaleY(0)}45%,55%{transform:scaleY(1)}}@media(prefers-reduced-motion:reduce){.aqua-scene .character-float--enabled,.aqua-scene .eyelid--blink{animation:none}}.landing-home{min-height:100dvh;overflow-x:clip;background:var(--color-home-paper);color:var(--color-home-ink);transition:opacity .18s var(--ease-out)}.landing-home--leaving{opacity:0}.home-shell{width:min(1376px,calc(100% - 96px));margin-inline:auto}.home-navbar{position:sticky;z-index:20;border-bottom:1px solid var(--color-home-line);background:var(--color-home-panel);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px)}.home-navbar__inner{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:32px}.home-brand{display:inline-flex;align-items:center;gap:12px;text-decoration:none;color:var(--color-home-ink);font:700 29px/1 var(--font-display);letter-spacing:-.045em;white-space:nowrap}.home-brand img{width:43px;height:47px;transition:transform var(--dur-ui) var(--ease-out)}.home-brand:hover img{transform:rotate(-4deg) translateY(-1px)}.home-navbar__menu{display:flex;align-items:center;gap:32px}.home-navbar nav,.home-navbar__actions{display:flex;align-items:center;gap:28px}.home-navbar nav a,.home-navbar nav button{border:0;padding:8px 0;background:transparent;color:var(--color-home-muted);text-decoration:none;font-weight:600;white-space:nowrap;transition:color var(--dur-fast) var(--ease-out)}.home-navbar nav a:hover,.home-navbar nav button:hover{color:var(--color-home-ink)}.home-navbar__actions{gap:12px;padding-left:28px;border-left:1px solid var(--color-home-line)}.home-signin,.home-start{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 24px;border-radius:13px;font-weight:700;white-space:nowrap;text-decoration:none;transition:transform var(--dur-fast) var(--ease-out),background-color var(--dur-ui) var(--ease-out),border-color var(--dur-ui) var(--ease-out),box-shadow var(--dur-ui) var(--ease-out)}.home-signin{border:1px solid var(--color-home-line);background:var(--color-home-panel-solid);color:var(--color-home-ink)}.home-start{border:1px solid var(--color-home-accent);background:var(--color-home-accent);color:var(--color-home-panel-solid);box-shadow:0 8px 20px var(--color-home-accent-faint)}.home-signin:hover,.home-start:hover{transform:translateY(-2px)}.home-signin:hover{border-color:var(--color-home-line-strong);background:var(--color-home-accent-soft)}.home-start:hover{background:var(--color-home-accent-hover);box-shadow:var(--shadow-home-cta)}.home-signin:active,.home-start:active{transform:scale(.975)}.home-menu-button{display:none;width:43px;height:43px;border:1px solid var(--color-home-line);border-radius:12px;background:var(--color-home-panel-solid)}.home-hero{position:relative;display:grid;grid-template-columns:minmax(0,.88fr) minmax(0,1.12fr);align-items:center;min-height:462px;padding:44px 0 18px}.home-hero__copy{position:relative;z-index:8;align-self:center;padding-left:4px;animation:home-copy-enter .62s var(--ease-out) both}.home-welcome{display:inline-flex;align-items:center;gap:8px;margin:0 0 24px;padding:9px 15px;border-radius:var(--radius-pill);background:var(--color-home-accent-soft);color:var(--color-home-accent-hover);font-weight:700;font-size:14px}.home-welcome svg{color:var(--color-home-accent)}.home-hero h1{max-width:630px;margin:0;font:700 clamp(48px,4.15vw,64px)/.99 var(--font-display);letter-spacing:-.052em;overflow-wrap:anywhere}.home-hero h1 span{display:block;color:var(--color-home-accent)}.home-hero__summary{margin:24px 0 0;color:var(--color-home-muted);font-size:clamp(16px,1.35vw,19px);line-height:1.65}.home-hero__actions{display:flex;align-items:center;gap:16px;margin-top:26px}.home-primary-cta,.home-secondary-cta{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:52px;padding:0 24px;border-radius:13px;font-weight:700;white-space:nowrap;text-decoration:none;transition:transform var(--dur-fast) var(--ease-out),background-color var(--dur-ui) var(--ease-out),border-color var(--dur-ui) var(--ease-out),box-shadow var(--dur-ui) var(--ease-out)}.home-primary-cta{border:1px solid var(--color-home-accent);background:var(--color-home-accent);color:var(--color-home-panel-solid);box-shadow:var(--shadow-home-cta)}.home-secondary-cta{border:1px solid var(--color-home-line);background:var(--color-home-panel-solid);color:var(--color-home-ink);box-shadow:0 8px 24px var(--color-home-shadow)}.home-primary-cta svg,.home-secondary-cta svg{transition:transform var(--dur-ui) var(--ease-out)}.home-primary-cta:hover,.home-secondary-cta:hover{transform:translateY(-2px)}.home-primary-cta:hover{background:var(--color-home-accent-hover);box-shadow:0 18px 34px var(--color-home-shadow-strong)}.home-secondary-cta:hover{border-color:var(--color-home-line-strong);background:var(--color-home-accent-soft)}.home-primary-cta:hover svg{transform:translate(3px)}.home-primary-cta:active,.home-secondary-cta:active{transform:scale(.975)}.home-aqua-stage{position:relative;align-self:stretch;min-width:0;min-height:400px;isolation:isolate;animation:home-aqua-enter .7s 90ms var(--ease-out) both}.home-aqua-backdrop{position:absolute;z-index:0;left:48%;top:49%;width:min(45vw,660px);aspect-ratio:1;border-radius:50%;background:radial-gradient(circle,var(--color-home-glow) 0 42%,var(--color-home-glow-soft) 42.3% 66%,transparent 66.4%);transform:translate(-50%,-50%)}.home-aqua-path{position:absolute;z-index:1;left:49%;top:50%;border:2px dashed var(--color-home-orbit);border-radius:50%;pointer-events:none}.home-aqua-path--one{width:72%;height:58%;transform:translate(-50%,-50%) rotate(-8deg)}.home-aqua-path--two{width:58%;height:74%;transform:translate(-50%,-50%) rotate(19deg);opacity:.58}.home-aqua-master{z-index:3}.home-aqua-master .scene-orbit{display:none}.home-aqua-master .character-position{left:50%;top:48%;width:clamp(330px,30vw,455px)}.home-aqua-master .aqua-platform{left:50%;bottom:5%;width:50%;height:11%}.home-aqua-master .aqua-base-layer{filter:drop-shadow(0 24px 20px var(--color-home-shadow-strong))}.home-physics-node{position:absolute;z-index:7;display:grid;justify-items:center;gap:6px;color:var(--color-home-muted);pointer-events:none}.home-physics-node span{display:grid;place-items:center;width:66px;height:66px;border:1px solid var(--color-home-line);border-radius:50%;background:var(--color-home-panel);box-shadow:0 10px 24px var(--color-home-shadow);color:var(--color-home-accent)}.home-physics-node strong{font-size:13px;color:var(--color-home-muted)}.home-physics-node--motion{left:12%;top:13%;animation:home-node-float 3.8s var(--ease-in-out) infinite}.home-physics-node--forces{right:7%;top:14%;animation:home-node-float 4.4s .35s var(--ease-in-out) infinite}.home-physics-node--waves{left:5%;bottom:16%;animation:home-node-float 5s .7s var(--ease-in-out) infinite}.home-physics-node--energy{right:2%;bottom:15%;animation:home-node-float 4.1s .2s var(--ease-in-out) infinite}.home-features{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));margin-top:4px;padding:18px 20px;border:1px solid var(--color-home-line);border-radius:18px;background:var(--color-home-panel);box-shadow:var(--shadow-home-panel)}.home-feature{display:grid;grid-template-columns:60px minmax(0,1fr);align-items:center;gap:15px;min-height:76px;padding:0 28px}.home-feature+.home-feature{border-left:1px solid var(--color-home-line)}.home-feature__icon{display:grid;place-items:center;width:58px;height:58px;border-radius:16px;background:var(--color-home-accent-soft);color:var(--color-home-accent);transition:transform var(--dur-ui) var(--ease-out),background-color var(--dur-ui) var(--ease-out)}.home-feature h2{margin:0;font:700 17px/1.2 var(--font-display);letter-spacing:-.02em;transition:color var(--dur-ui) var(--ease-out)}.home-feature p{max-width:280px;margin:6px 0 0;color:var(--color-home-muted);font-size:13px;line-height:1.45}.home-feature:hover .home-feature__icon{transform:translateY(-1px) scale(1.04);background:var(--color-home-glow-soft)}.home-feature:hover h2{color:var(--color-home-accent-hover)}.home-subjects{padding:30px 0 20px}.home-subjects__heading{margin-bottom:14px}.home-subjects__heading h2{margin:0;font:700 24px/1.2 var(--font-display);letter-spacing:-.03em}.home-subjects__heading p{margin:5px 0 0;color:var(--color-home-muted);font-size:14px}.home-subject-grid{display:grid;grid-template-columns:repeat(2,1.12fr) repeat(3,minmax(0,1fr));gap:16px}.home-subject-card{min-width:0;min-height:190px;padding:18px;border:1px solid var(--color-home-line);border-radius:16px;background:var(--color-home-panel-solid)}.home-subject-card--active{display:flex;flex-direction:column;border-color:var(--color-home-line-strong);box-shadow:0 12px 28px var(--color-home-shadow);transition:transform var(--dur-ui) var(--ease-out),box-shadow var(--dur-ui) var(--ease-out)}.home-subject-card--active:hover{transform:translateY(-2px);box-shadow:var(--shadow-home-panel)}.home-subject-card__top{display:grid;grid-template-columns:60px minmax(0,1fr);gap:14px;align-items:start}.home-subject-icon{display:grid;place-items:center;width:58px;height:58px;border-radius:17px;background:var(--color-home-accent-soft);color:var(--color-home-accent)}.home-subject-card h3{margin:2px 0 4px;font:700 17px/1.25 var(--font-display);letter-spacing:-.015em}.home-subject-card p{margin:0;color:var(--color-home-muted);font-size:12px;line-height:1.45}.home-active-label{display:inline-block;margin-bottom:3px;color:var(--color-home-accent-hover);font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:.08em}.home-subject-description{max-width:260px;margin:13px 0 15px!important}.home-subject-card--active>a{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:39px;margin-top:auto;border-radius:11px;background:var(--color-home-accent);color:var(--color-home-panel-solid);text-decoration:none;font-size:12px;font-weight:700;white-space:nowrap;transition:transform var(--dur-fast) var(--ease-out),background-color var(--dur-ui) var(--ease-out)}.home-subject-card--active>a:hover{transform:translateY(-1px);background:var(--color-home-accent-hover)}.home-subject-card--active>a:active{transform:scale(.98)}.home-subject-card--active>a:focus-visible{outline:3px solid color-mix(in srgb,var(--color-home-accent) 35%,transparent);outline-offset:3px}.home-subject-card--disabled{display:flex;flex-direction:column;background:var(--color-home-disabled);color:var(--color-home-disabled-ink);box-shadow:none}.home-subject-card--disabled .home-subject-icon{background:var(--color-disabled);color:var(--color-home-disabled-ink)}.home-subject-card--disabled h3,.home-subject-card--disabled p{color:var(--color-home-disabled-ink)}.home-coming{display:inline-flex;align-items:center;gap:7px;margin:auto auto 0;color:var(--color-home-disabled-ink);font-size:12px;font-weight:600}.home-section{scroll-margin-top:92px}.home-section-heading{margin-bottom:20px}.home-section-heading h2,.home-duo h2,.home-ask h2,.home-final h2{margin:0;font:700 clamp(25px,2.4vw,34px)/1.1 var(--font-display);letter-spacing:-.045em}.home-step-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.home-step{position:relative;min-height:185px;padding:24px 22px 20px;border:1px solid var(--color-home-line);border-radius:17px;background:var(--color-home-panel-solid);transition:transform var(--dur-ui) var(--ease-out),box-shadow var(--dur-ui) var(--ease-out)}.home-step:hover{transform:translateY(-4px);box-shadow:var(--shadow-home-panel)}.home-step__number{display:inline-grid;place-items:center;width:27px;height:27px;border-radius:50%;background:var(--color-home-accent);color:#fff;font-size:11px;font-weight:800}.home-step__icon{display:grid;place-items:center;width:54px;height:54px;margin:-4px auto 13px;border-radius:50%;background:var(--color-home-accent-soft);color:var(--color-home-accent)}.home-step h3{margin:0;text-align:center;font:700 17px/1.2 var(--font-display)}.home-step p{margin:7px auto 0;max-width:190px;color:var(--color-home-muted);font-size:13px;line-height:1.5;text-align:center}.home-step__arrow{position:absolute;right:-25px;top:50%;color:#b9d6fb;transform:translateY(-50%)}.home-journey{padding-top:82px}.home-ask{display:grid;grid-template-columns:.8fr 1.2fr;align-items:center;gap:48px;margin-top:82px;padding:32px 38px;border-radius:19px;background:linear-gradient(110deg,#f0f6ff,#f8fbff)}.home-ask h2 span,.home-final h2 span{color:var(--color-home-accent)}.home-ask__copy p{max-width:290px;margin:12px 0 18px;color:var(--color-home-muted);line-height:1.55}.home-demo-button{display:inline-flex;align-items:center;gap:7px;border:1px solid #dceafe;padding:10px 14px;border-radius:13px;background:#fff;color:var(--color-home-accent-hover);font-weight:700;box-shadow:0 8px 20px #2563eb14}.home-demo-button span{font-size:16px}.home-ask__demo{position:relative;display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:28px;min-height:210px}.home-question-card,.home-chat-card{padding:22px;border:1px solid var(--color-home-line);border-radius:14px;background:#fff;color:var(--color-home-ink);line-height:1.55;box-shadow:0 10px 25px #2563eb0f}.home-question-card mark{background:#dceaff;color:#1467de}.home-chat-card{opacity:.55;transform:translateY(12px);transition:opacity .6s var(--ease-out),transform .6s var(--ease-out)}.home-chat-card.is-played{opacity:1;transform:translateY(0)}.home-chat-card__head{display:flex;align-items:center;gap:8px;font-size:12px}.home-chat-card__head img,.home-answer img{width:24px;height:27px}.home-chat-card__head span{margin-left:auto;color:#178b58;font-size:11px}.home-chat-card>p{margin:17px 0 12px;padding:9px 12px;border-radius:10px;background:#edf5ff;font-size:12px}.home-answer{display:flex;gap:9px;font-size:12px}.home-answer strong{display:inline-block;margin-top:8px;padding:3px 7px;border-radius:5px;background:#e7f1ff;color:#1768d9}.home-duo{display:grid;grid-template-columns:1fr 1.2fr;align-items:center;gap:28px;margin-top:28px;padding:30px 34px;border-radius:18px;background:#f5f9ff}.home-info-panel{display:flex;gap:16px;align-items:flex-start}.home-panel-icon{display:grid;place-items:center;flex:0 0 52px;width:52px;height:52px;border-radius:15px;background:#e4f0ff;color:var(--color-home-accent)}.home-info-panel p{max-width:300px;margin:10px 0 0;color:var(--color-home-muted);font-size:13px;line-height:1.55}.home-paper-mock{padding:15px 18px;border-radius:13px;background:#fff;box-shadow:0 8px 20px #2563eb0f;font-size:12px}.home-paper-top,.home-paper-row{display:grid;grid-template-columns:1.4fr 1fr .4fr;gap:10px;align-items:center;padding:9px 7px}.home-paper-top{border-bottom:1px solid var(--color-home-line);font-size:11px}.home-paper-row{color:var(--color-home-muted);border-bottom:1px solid #f0f4fa}.home-paper-row.is-selected{border-radius:7px;background:#edf5ff;color:var(--color-home-accent-hover);font-weight:700}.home-mastery-mock{display:flex;justify-content:center;align-items:center;gap:48px}.home-ring{display:grid;place-items:center;width:136px;height:136px;border-radius:50%;background:conic-gradient(var(--color-home-accent) var(--ring),#dceaf8 0);position:relative}.home-ring:after{content:"";position:absolute;inset:10px;border-radius:50%;background:#fff}.home-ring strong,.home-ring span{position:relative;z-index:1}.home-ring strong{margin-top:15px;font:700 28px/1 var(--font-display)}.home-ring span{margin-top:-30px;color:var(--color-home-muted);font-size:10px}.home-strengths{display:grid;gap:6px;color:#4c8e72;font-size:12px}.home-strengths b{margin-top:4px;color:var(--color-home-ink)}.home-strengths .needs{color:#dd8b4d}.home-final{display:flex;align-items:center;gap:28px;margin-top:28px;padding:23px 30px;border-radius:18px;background:linear-gradient(110deg,#edf6ff,#f8fbff)}.home-final img{width:65px;height:72px;align-self:flex-end}.home-final p{margin:8px 0 0;color:var(--color-home-muted)}.home-final a{margin-left:auto;display:inline-flex;align-items:center;gap:8px;padding:13px 18px;border-radius:11px;background:var(--color-home-accent);color:#fff;text-decoration:none;font-weight:700;white-space:nowrap}.home-footer{margin-top:30px;border-top:1px solid var(--color-home-line)}.home-mastery{display:grid;grid-template-columns:1fr .95fr 1.2fr;align-items:center;min-height:0;margin-top:28px;padding:56px 52px;border:1px solid #e1ebf7;border-radius:24px;background:linear-gradient(120deg,#f8fbff,#f1f7ff);box-shadow:0 18px 42px #25528c14;scroll-margin-top:92px}.home-mastery__intro,.home-mastery__center,.home-metrics{min-width:0}.home-mastery__intro{display:flex;gap:18px;align-items:flex-start;padding-right:34px}.home-mastery__intro h2{margin:3px 0 0;font:700 clamp(26px,2.2vw,35px)/1.12 var(--font-display);letter-spacing:-.045em}.home-mastery__intro h2 span{color:var(--color-home-accent)}.home-mastery__intro p{margin:18px 0 0;color:var(--color-home-muted);line-height:1.65}.home-mastery__center{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;row-gap:18px;padding:0 42px}.home-mastery__center:before,.home-mastery__center:after{content:"";position:absolute;top:50%;width:1px;height:280px;background:#e4edf8;transform:translateY(-50%)}.home-mastery__center:before{left:0}.home-mastery__center:after{right:0}.home-ring{position:relative;width:240px;height:240px;aspect-ratio:1 / 1;flex:0 0 240px;overflow:visible;background:transparent;transition:transform .18s var(--ease-out),filter .18s var(--ease-out)}.home-ring:after{display:none}.home-ring:hover{transform:scale(1.015);filter:drop-shadow(0 8px 12px rgba(37,99,235,.12))}.home-ring svg{display:block;width:100%;height:100%;transform:rotate(-90deg);overflow:visible}.home-ring circle{fill:none;stroke-width:12}.home-ring__track{stroke:#dce8f5}.home-ring__progress{stroke:#2d7ff0;stroke-linecap:round;transition:stroke-dashoffset 1.1s cubic-bezier(.22,1,.36,1)}.home-ring__label{position:absolute;inset:0;display:grid;place-content:center;justify-items:center;pointer-events:none}.home-ring__label strong{color:var(--color-home-ink);font:700 clamp(42px,4vw,58px)/1 var(--font-display);letter-spacing:-.05em}.home-ring__label span{margin-top:11px;color:var(--color-home-muted);font-size:15px}.home-trend{position:static;display:inline-flex;flex:0 0 auto;align-items:center;gap:7px;min-height:38px;margin:0;padding:0 15px;border-radius:10px;background:#e9f3ffd1;color:#2578e8;font-size:15px;font-weight:700;opacity:0;transform:translateY(6px);transition:opacity .3s var(--ease-out) .85s,transform .3s var(--ease-out) .85s}.home-trend.is-visible{opacity:1;transform:translateY(0)}.home-metrics{display:grid;gap:24px;padding-left:38px}.home-metric-group+.home-metric-group{padding-top:22px;border-top:1px solid #e1ebf7}.home-metric-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:15px}.home-metric-heading h3{margin:0;font:700 21px/1.2 var(--font-display);letter-spacing:-.03em}.home-metric-heading>span{display:inline-flex;align-items:center;gap:6px;padding:7px 10px;border-radius:10px;font-size:12px;font-weight:700}.home-metric-group--strength .home-metric-heading>span{background:#e1f6eb;color:#168a5a}.home-metric-group--needs .home-metric-heading>span{background:#fff0e5;color:#dd822c}.home-metric-list{display:grid;gap:13px}.home-metric-row{padding:7px 8px;border-radius:10px;transition:background-color .18s var(--ease-out)}.home-metric-row:hover{background:#e1efffb3}.home-metric-label{display:grid;grid-template-columns:26px minmax(0,1fr) auto;align-items:center;gap:8px;color:var(--color-home-ink)}.home-metric-label b{font-size:14px;transition:transform .18s var(--ease-out)}.home-metric-row:hover .home-metric-label b{transform:translate(2px)}.home-metric-label strong{font-size:13px;font-weight:700}.home-metric-icon{display:grid;place-items:center;width:26px;height:26px;border-radius:50%}.home-metric-group--strength .home-metric-icon{background:#d9f2e5;color:#159161}.home-metric-group--needs .home-metric-icon{background:#ffead9;color:#ea8430}.home-metric-track{height:6px;margin:6px 0 0 34px;overflow:hidden;border-radius:999px;background:#e2ebf5}.home-metric-track span{display:block;width:0;height:100%;border-radius:inherit;transition:width .8s cubic-bezier(.22,1,.36,1) var(--delay)}.home-metric-track span.is-filled{width:var(--value)}.home-metric-group--strength .home-metric-track span{background:#24ad72}.home-metric-group--needs .home-metric-track span{background:#f29a43}.home-footer{display:flex;align-items:center;justify-content:center;gap:10px;min-height:56px;padding-bottom:12px;color:var(--color-home-muted);font-size:11px}.home-footer img{width:27px;height:30px}.home-footer p{margin:0}.home-footer p span{display:block}.home-reveal{opacity:0;transform:translateY(12px);transition:opacity .52s var(--ease-out),transform .52s var(--ease-out)}.home-reveal.is-visible{opacity:1;transform:translateY(0)}.landing-home button:focus-visible,.landing-home a:focus-visible{outline:3px solid var(--color-home-focus);outline-offset:3px}@keyframes home-copy-enter{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@keyframes home-aqua-enter{0%{opacity:0;transform:scale(.98)}to{opacity:1;transform:scale(1)}}@keyframes home-node-float{0%,to{transform:translateY(0)}50%{transform:translateY(-3px)}}@media(max-width:1120px){.home-shell{width:min(100% - 48px,1080px)}.home-navbar__menu{gap:20px}.home-navbar nav{gap:20px}.home-navbar__actions{padding-left:20px}.home-signin,.home-start{padding-inline:18px}.home-hero{grid-template-columns:minmax(0,.95fr) minmax(0,1.05fr);min-height:440px}.home-hero h1{font-size:clamp(43px,4.8vw,54px)}.home-aqua-master .character-position{width:clamp(300px,36vw,410px)}.home-physics-node--motion{left:5%}.home-physics-node--forces{right:1%}.home-physics-node--waves{left:0}.home-physics-node--energy{right:-2%}.home-feature{padding-inline:18px}.home-subject-grid{grid-template-columns:repeat(2,1.12fr) repeat(3,minmax(0,1fr));gap:12px}}@media(max-width:860px){.home-shell{width:min(100% - 32px,760px)}.home-navbar__inner{min-height:68px}.home-menu-button{display:grid;place-items:center}.home-navbar__menu{position:absolute;top:60px;left:16px;right:16px;display:none;padding:18px;border:1px solid var(--color-home-line);border-radius:16px;background:var(--color-home-panel-solid);box-shadow:var(--shadow-home-panel)}.home-navbar__menu.is-open{display:grid;gap:16px}.home-navbar nav{display:grid;gap:2px}.home-navbar nav a,.home-navbar nav button{width:100%;padding:11px 8px;text-align:left}.home-navbar__actions{display:grid;grid-template-columns:1fr 1fr;padding:14px 0 0;border-left:0;border-top:1px solid var(--color-home-line)}.home-hero{grid-template-columns:1fr;min-height:0;padding-top:52px}.home-hero__copy{padding-left:0}.home-hero h1{max-width:700px;font-size:clamp(44px,8vw,58px)}.home-aqua-stage{min-height:520px;margin-top:10px}.home-aqua-master .character-position{width:min(500px,68vw)}.home-aqua-backdrop{width:min(760px,90vw)}.home-features{grid-template-columns:1fr;padding:6px 20px}.home-feature{min-height:100px;padding:14px 8px}.home-feature+.home-feature{border-left:0;border-top:1px solid var(--color-home-line)}.home-subject-grid,.home-step-grid{grid-template-columns:1fr 1fr}.home-step__arrow{display:none}.home-ask,.home-duo{grid-template-columns:1fr;gap:24px}.home-ask__demo{min-height:0}.home-mastery-mock{justify-content:flex-start}.home-mastery{grid-template-columns:1fr 1fr;gap:28px;padding:34px}.home-mastery__center{border-right:0;padding:0 0 0 24px}.home-mastery__center:after{display:none}.home-metrics{grid-column:1 / -1;padding:26px 0 0;border-top:1px solid #e4edf8}}@media(max-width:560px){.home-shell{width:min(100% - 24px,520px)}.home-brand{font-size:24px}.home-brand img{width:36px;height:40px}.home-hero{padding-top:38px}.home-welcome{margin-bottom:18px;font-size:12px}.home-hero h1{font-size:clamp(39px,12vw,50px);line-height:1.02}.home-hero__summary{margin-top:19px;font-size:15px}.home-hero__actions{align-items:stretch;flex-direction:column;margin-top:22px}.home-primary-cta,.home-secondary-cta{width:100%}.home-aqua-stage{min-height:420px;margin-top:14px}.home-aqua-master .character-position{top:48%;width:min(430px,98vw)}.home-aqua-master .aqua-platform{bottom:7%;width:68%}.home-aqua-path--one{width:94%;height:58%}.home-aqua-path--two{width:76%;height:74%}.home-physics-node span{width:50px;height:50px}.home-physics-node strong{font-size:11px}.home-physics-node--motion{left:1%;top:10%}.home-physics-node--forces{right:0;top:10%}.home-physics-node--waves{left:-1%;bottom:13%}.home-physics-node--energy{right:-1%;bottom:13%}.home-features{border-radius:16px}.home-feature{grid-template-columns:52px minmax(0,1fr);gap:13px}.home-feature__icon{width:50px;height:50px;border-radius:14px}.home-subjects{padding-top:32px}.home-subject-grid{grid-template-columns:1fr}.home-subject-card{min-height:170px}.home-subject-card--disabled{min-height:138px}.home-journey,.home-ask,.home-duo{margin-top:54px;padding:24px 18px}.home-step-grid{grid-template-columns:1fr}.home-step{min-height:0}.home-ask__demo{grid-template-columns:1fr}.home-mastery-mock{flex-direction:column;gap:22px;align-items:flex-start}.home-mastery{display:grid;grid-template-columns:1fr;gap:30px;margin-top:54px;padding:28px 20px}.home-mastery__intro{padding-right:0}.home-mastery__center{border:0;padding:0}.home-mastery__center:before,.home-mastery__center:after{display:none}.home-ring{width:min(190px,72vw);height:min(190px,72vw);flex-basis:min(190px,72vw)}.home-metrics{grid-column:auto;padding:25px 0 0}.home-final{align-items:flex-start;flex-wrap:wrap;gap:14px;padding:22px 18px}.home-final img{width:48px;height:54px}.home-final a{width:100%;justify-content:center;margin-left:0}.home-footer{align-items:flex-start;justify-content:flex-start;padding:18px 0 22px}}@media(prefers-reduced-motion:reduce){.landing-home,.home-hero__copy,.home-aqua-stage,.home-physics-node,.home-reveal{animation:none;transition:none;opacity:1;transform:none}.home-ring__progress,.home-trend,.home-metric-track span{transition:none}.home-trend{opacity:1;transform:none}}.home-auth-loading{display:inline-flex;align-items:center;justify-content:center;min-width:46px;min-height:46px;color:var(--color-home-muted);font-weight:900;letter-spacing:.12em}.home-account-wrap{position:relative}.home-account{display:inline-flex;align-items:center;gap:8px;min-height:46px;padding:0 10px 0 7px;border:1px solid var(--color-home-line);border-radius:13px;background:var(--color-home-panel-solid);color:var(--color-home-ink);font:inherit;font-weight:800;cursor:pointer}.home-account-avatar{display:grid;place-items:center;width:31px;height:31px;border-radius:10px;background:var(--color-home-accent);color:#fff;font-size:13px}.home-account-name{max-width:96px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.home-account-menu{position:absolute;z-index:20;top:calc(100% + 8px);right:0;display:grid;min-width:150px;padding:7px;border:1px solid var(--color-home-line);border-radius:13px;background:var(--color-home-panel-solid);box-shadow:var(--shadow-home-panel)}.home-account-menu a,.home-account-menu button{padding:10px 11px;border:0;border-radius:8px;background:transparent;color:var(--color-home-muted);font:inherit;text-align:left;text-decoration:none;cursor:pointer}.home-account-menu a:hover,.home-account-menu button:hover{background:var(--color-home-accent-soft);color:var(--color-home-ink)}@media(max-width:760px){.home-account-wrap{width:100%}.home-account{width:100%;justify-content:flex-start}.home-account-menu{position:static;margin-top:6px;box-shadow:none}}.modal-open{overflow:hidden}.mode-modal__overlay{position:fixed;z-index:var(--layer-modal, 90);inset:0;display:grid;place-items:center;padding:24px;background:#0a1e3a73;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);animation:mode-scrim-in .18s ease-out both}.mode-modal{position:relative;width:min(820px,100%);max-height:min(860px,calc(100dvh - 40px));overflow:auto;padding:34px;border:1px solid var(--color-home-line);border-radius:22px;background:#fff;box-shadow:0 28px 80px #10305b38;animation:mode-dialog-in .28s var(--ease-out) both}.mode-modal__close{position:absolute;top:18px;right:18px;display:grid;place-items:center;width:44px;height:44px;border:0;border-radius:12px;background:transparent;color:var(--color-home-muted);transition:color var(--dur-fast),background var(--dur-fast),transform var(--dur-fast)}.mode-modal__close:hover{color:var(--color-home-ink);background:var(--color-home-accent-soft)}.mode-modal__close:active{transform:scale(.96)}.mode-modal header{padding-right:48px}.mode-modal__kicker{color:var(--color-home-accent-hover);font-size:13px;font-weight:700}.mode-modal h2{margin:6px 0 7px;font:700 clamp(27px,3vw,36px)/1.12 var(--font-display);letter-spacing:-.035em}.mode-modal header p{margin:0;color:var(--color-home-muted)}.mode-options{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:28px}.mode-option{position:relative;display:grid;grid-template-columns:48px minmax(0,1fr) 24px;gap:14px;min-height:310px;padding:22px;border:1.5px solid var(--color-home-line);border-radius:18px;background:#fff;color:var(--color-home-ink);text-align:left;transition:border-color .18s var(--ease-out),background .18s var(--ease-out),box-shadow .18s var(--ease-out),transform .16s var(--ease-out)}.mode-option:hover{border-color:var(--color-home-line-strong);background:#fbfdff;box-shadow:0 12px 30px var(--color-home-shadow)}.mode-option:active{transform:scale(.99)}.mode-option--selected{border-color:var(--color-home-accent);background:var(--color-home-accent-soft);box-shadow:0 0 0 3px #3f8df51c}.mode-option__icon{display:grid;place-items:center;width:48px;height:48px;border-radius:14px;background:var(--color-home-accent-soft);color:var(--color-home-accent-hover)}.mode-option--selected .mode-option__icon{background:#fff}.mode-option__copy{display:block;min-width:0}.mode-option__copy>strong{display:block;margin-top:2px;font:700 20px/1.2 var(--font-display);letter-spacing:-.02em}.mode-option__copy>span{display:block;margin-top:8px;color:var(--color-home-muted);font-size:14px;line-height:1.5}.mode-option ul{display:grid;gap:9px;margin:20px 0 0;padding:17px 0 0;border-top:1px solid var(--color-home-line);list-style:none}.mode-option li{display:flex;align-items:flex-start;gap:8px;color:#536783;font-size:13px;line-height:1.35}.mode-option li svg{flex:0 0 auto;margin-top:2px;color:var(--color-home-accent-hover)}.mode-option small{display:block;margin-top:17px;color:var(--color-home-accent-hover);font-size:12px;font-weight:700}.mode-option__check{display:grid;place-items:center;width:22px;height:22px;border:1.5px solid var(--color-home-line-strong);border-radius:50%;color:#fff}.mode-option--selected .mode-option__check{border-color:var(--color-home-accent);background:var(--color-home-accent)}.mode-modal footer{display:flex;justify-content:flex-end;gap:12px;margin-top:24px;padding-top:22px;border-top:1px solid var(--color-home-line)}.mode-modal__cancel,.mode-modal__start{display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:48px;padding:0 22px;border-radius:13px;font-weight:700;white-space:nowrap;transition:background .18s var(--ease-out),border-color .18s var(--ease-out),transform .16s var(--ease-out),opacity .18s}.mode-modal__cancel{border:1px solid var(--color-home-line);background:#fff;color:var(--color-home-ink)}.mode-modal__start{border:1px solid var(--color-home-accent);background:var(--color-home-accent);color:#fff}.mode-modal__cancel:hover{border-color:var(--color-home-line-strong);background:var(--color-home-accent-soft)}.mode-modal__start:not(:disabled):hover{background:var(--color-home-accent-hover)}.mode-modal__cancel:active,.mode-modal__start:not(:disabled):active{transform:scale(.975)}.mode-modal__start:disabled{border-color:#ccd8e5;background:#dce5ee;color:#77889e;opacity:.72}@keyframes mode-scrim-in{0%{opacity:0}}@keyframes mode-dialog-in{0%{opacity:0;transform:translateY(10px) scale(.985)}}@media(max-width:700px){.mode-modal__overlay{align-items:end;padding:0}.mode-modal{width:100%;max-height:94dvh;padding:25px 18px calc(18px + env(safe-area-inset-bottom));border-radius:22px 22px 0 0}.mode-modal h2{font-size:27px}.mode-options{grid-template-columns:1fr;margin-top:22px}.mode-option{min-height:0;padding:18px}.mode-option ul{margin-top:14px;padding-top:13px}.mode-modal footer{position:sticky;bottom:-1px;margin-inline:-18px;padding:16px 18px 1px;background:#fff}.mode-modal__cancel{flex:0 0 auto}.mode-modal__start{flex:1}}@media(prefers-reduced-motion:reduce){.mode-modal__overlay,.mode-modal{animation:none}}.aqua-tour-open{overflow:hidden}.aqua-tour{position:fixed;inset:0;z-index:100;display:grid;place-items:center;padding:24px;animation:aqua-tour-fade .22s ease-out both}.aqua-tour__backdrop{position:absolute;inset:0;border:0;background:#1431587a;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px);cursor:default}.aqua-tour__modal{position:relative;display:flex;flex-direction:column;width:min(1450px,86vw);height:min(820px,84vh);min-height:620px;overflow:hidden;border:1px solid rgba(191,218,246,.9);border-radius:30px;background:#fff;box-shadow:0 32px 90px #2248793d;animation:aqua-tour-pop .28s cubic-bezier(.22,1,.36,1) both}.aqua-tour__header{display:flex;align-items:center;justify-content:space-between;padding:26px 34px 10px;color:#54729b;font-size:16px;font-weight:800}.aqua-tour__header>span{display:inline-flex;align-items:center;gap:10px}.aqua-tour__header svg{color:#287ef0}.aqua-tour__close{display:grid;place-items:center;width:44px;height:44px;border:0;border-radius:12px;background:transparent;color:#637998;cursor:pointer}.aqua-tour__close:hover{background:#eff6ff;color:#16345d}.aqua-tour__body{display:grid;grid-template-columns:minmax(300px,.78fr) minmax(0,1.22fr);gap:34px;flex:1;min-height:0;padding:28px 40px 18px}.aqua-tour__copy{align-self:center;max-width:460px;padding-left:2px;animation:aqua-tour-content-in .3s ease-out both}.aqua-tour__eyebrow{color:#287ef0;font:800 17px/1 var(--font-display);letter-spacing:.01em}.aqua-tour__copy h2{margin:24px 0 20px;color:#112f57;font:800 clamp(38px,4vw,61px)/.98 var(--font-display);letter-spacing:-.055em}.aqua-tour__copy h2 span{color:#287ef0}.aqua-tour__copy>p{max-width:420px;margin:0;color:#6881a4;font-size:17px;line-height:1.65}.aqua-tour__copy ul{display:grid;gap:17px;margin:38px 0 0;padding:0;list-style:none;color:#5f789d;font-size:16px}.aqua-tour__copy li{display:flex;align-items:center;gap:12px}.aqua-tour__copy li svg{flex:0 0 auto;width:28px;height:28px;padding:6px;border-radius:50%;background:#dcebff;color:#287ef0}.aqua-tour__demo{min-width:0;min-height:0;display:grid;align-items:center;animation:aqua-tour-content-in .32s calc(40ms * var(--tour-direction, 1)) ease-out both}.aqua-tour__stage{position:relative;width:100%;height:min(580px,100%);min-height:400px;overflow:hidden;border:1px solid #d5e7f9;border-radius:25px;background:linear-gradient(145deg,#edf7ff,#f9fcff 68%,#e5f2ff)}.aqua-tour__stage:after{position:absolute;inset:auto -20% -46% 25%;z-index:0;width:90%;height:70%;border-radius:50%;background:#cae7ff6b;content:""}.aqua-tour__stage-toolbar{position:absolute;z-index:5;top:15px;left:18px;right:18px;display:flex;align-items:center;justify-content:space-between;color:#7290b3;font-size:11px;font-weight:800;letter-spacing:.04em;text-transform:uppercase}.aqua-tour__stage-toolbar span{display:inline-flex;align-items:center;gap:7px}.aqua-tour__stage-toolbar i{width:7px;height:7px;border-radius:50%;background:#42bd88;box-shadow:0 0 0 4px #42bd881f}.aqua-tour__stage-toolbar button{display:inline-flex;align-items:center;gap:5px;padding:7px 10px;border:1px solid #d7e7f6;border-radius:9px;background:#ffffffa3;color:#6683a8;cursor:pointer}.aqua-tour__stage-toolbar button:hover{color:#287ef0;border-color:#9ecaff}.aqua-tour__stage-content{position:absolute;inset:46px 20px 24px;z-index:1}.aqua-tour__demo-heading{display:flex;align-items:flex-start;justify-content:space-between;gap:12px}.aqua-tour__demo-heading span:first-child{display:block;color:#17365f;font:800 22px/1.15 var(--font-display);letter-spacing:-.03em}.aqua-tour__demo-heading small{display:block;margin-top:6px;color:#7991b1;font-size:12px}.aqua-tour__demo-kicker{color:#287ef0;font-size:11px;font-weight:800;text-transform:uppercase}.aqua-tour__subject-demo{position:relative;height:100%;padding:24px 24px 26px;border:1px solid rgba(208,226,244,.9);border-radius:19px;background:#ffffffdb;box-shadow:0 17px 32px #3d6ea114}.aqua-tour__subject-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:27px}.aqua-tour__subject-card{position:relative;display:grid;grid-template-columns:38px minmax(0,1fr) auto;align-items:center;gap:9px;min-height:90px;padding:13px;border:1px solid #e1ebf5;border-radius:14px;background:#fafdff;color:#9aabc0;transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease,background-color .22s ease}.aqua-tour__subject-card.is-active{color:#17365f;border-color:#a5caff}.aqua-tour__subject-card.is-hovered{transform:translateY(-3px);border-color:#287ef0;background:#fff;box-shadow:0 10px 22px #2a7ef021}.aqua-tour__subject-card.is-opened{background:#eef7ff}.aqua-tour__subject-icon{display:grid;place-items:center;width:38px;height:38px;border-radius:12px;background:#eaf4ff;color:#287ef0}.aqua-tour__subject-card strong{display:block;font-size:13px}.aqua-tour__subject-card small{display:block;margin-top:6px;font-size:10px}.aqua-tour__subject-card small.is-available{color:#287ef0}.aqua-tour__subject-card em{position:absolute;right:12px;bottom:-23px;color:#287ef0;font-size:10px;font-style:normal;font-weight:700}.aqua-tour__mascot-note{position:absolute;right:20px;bottom:12px;display:flex;align-items:flex-end;gap:7px;color:#5b78a1;font-size:12px;font-weight:700;transform:rotate(-4deg)}.aqua-tour__mascot-note img{width:72px;height:78px;object-fit:contain}.aqua-tour__cursor{position:absolute;z-index:8;left:var(--cursor-x);top:var(--cursor-y);pointer-events:none;transition:left .85s cubic-bezier(.22,1,.36,1),top .85s cubic-bezier(.22,1,.36,1)}.aqua-tour__cursor>span{display:block;transition:transform .16s ease}.aqua-tour__cursor>span.is-clicking{transform:scale(.9)}.aqua-tour__cursor-arrow{display:block;width:0;height:0;border-top:15px solid #17365f;border-right:10px solid transparent;transform:rotate(-28deg);filter:drop-shadow(1px 2px 2px rgba(26,67,111,.18))}.aqua-tour__click-ring{position:absolute;top:4px;left:2px;width:24px;height:24px;border:2px solid #5eaeff;border-radius:50%;opacity:0;transform:scale(.3)}.aqua-tour__cursor>span.is-clicking .aqua-tour__click-ring{animation:aqua-tour-click .42s ease-out}.aqua-tour__syllabus-demo{display:grid;grid-template-columns:145px minmax(0,1fr);height:100%;overflow:hidden;border:1px solid #d6e5f4;border-radius:19px;background:#ffffffe6;box-shadow:0 17px 32px #3d6ea114}.aqua-tour__syllabus-demo aside{padding:20px 12px;border-right:1px solid #e2ecf6;background:#f6faff}.aqua-tour__syllabus-demo aside strong{display:block;color:#287ef0;font-size:11px}.aqua-tour__syllabus-demo aside small{display:block;margin:8px 0 20px;color:#647e9f;font-size:10px;line-height:1.45}.aqua-tour__syllabus-demo aside span{display:flex;align-items:flex-start;gap:7px;margin:7px 0;padding:8px 6px;border-radius:8px;color:#6881a4;font-size:10px;line-height:1.25}.aqua-tour__syllabus-demo aside span.is-selected{background:#e2efff;color:#17365f;font-weight:700}.aqua-tour__syllabus-demo aside b{display:grid;place-items:center;width:17px;height:17px;flex:0 0 auto;border-radius:50%;background:#fff;font-size:10px}.aqua-tour__syllabus-main{min-width:0;padding:24px 20px}.aqua-tour__search{padding:7px 9px;border:1px solid #e0ebf5;border-radius:8px;color:#91a3ba;font-size:10px;font-weight:600}.aqua-tour__unit{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:25px;padding:13px;border-radius:12px;background:#f4f9ff}.aqua-tour__unit>div{display:grid;grid-template-columns:30px 1fr;gap:3px 8px;align-items:center}.aqua-tour__unit b{grid-row:span 2;display:grid;place-items:center;width:27px;height:27px;border-radius:8px;background:#287ef0;color:#fff;font-size:10px}.aqua-tour__unit strong{color:#17365f;font-size:12px}.aqua-tour__unit span:not(.aqua-tour__chevron){grid-column:2;color:#7991b1;font-size:10px}.aqua-tour__chevron{color:#287ef0}.aqua-tour__modules{margin-top:18px}.aqua-tour__modules>small{color:#728aaa;font-size:10px;font-weight:800}.aqua-tour__modules>div{display:flex;align-items:center;gap:8px;margin-top:9px;padding:10px;border:1px solid #e2edf7;border-radius:10px}.aqua-tour__modules>div.is-ready{border-color:#b7d7fb;background:#f7fbff}.aqua-tour__modules>div>span{display:grid;place-items:center;width:24px;height:24px;flex:0 0 auto;border-radius:7px;background:#e8f2ff;color:#287ef0}.aqua-tour__modules p{min-width:0;flex:1;margin:0}.aqua-tour__modules p strong,.aqua-tour__modules p small{display:block;overflow:hidden;color:#17365f;font-size:10px;white-space:nowrap;text-overflow:ellipsis}.aqua-tour__modules p small{margin-top:3px;color:#8096b2;font-size:9px}.aqua-tour__modules button{display:inline-flex;align-items:center;gap:3px;flex:0 0 auto;padding:6px 8px;border:0;border-radius:7px;background:#ddebff;color:#287ef0;font-size:9px;font-weight:800}.aqua-tour__success{display:flex;align-items:center;gap:6px;margin-top:14px;padding:9px;border-radius:8px;background:#e7f8ee;color:#1a9662;font-size:10px;font-weight:800}.aqua-tour__practice-demo{height:100%;padding:14px;border:1px solid #d6e5f4;border-radius:19px;background:#ffffffe6;box-shadow:0 17px 32px #3d6ea114}.aqua-tour__demo-tabs{display:flex;align-items:center;gap:17px;padding:0 5px 14px;border-bottom:1px solid #edf2f7;color:#8aa0ba;font-size:10px}.aqua-tour__demo-tabs b{display:inline-flex;align-items:center;gap:5px;padding-bottom:10px;margin-bottom:-15px;border-bottom:2px solid #287ef0;color:#287ef0}.aqua-tour__question{max-width:520px;margin:18px auto 0}.aqua-tour__question-meta{display:flex;justify-content:space-between;color:#6d88a9;font-size:10px}.aqua-tour__question-meta b{padding:5px 8px;border-radius:999px;background:#eff5fb}.aqua-tour__question h3{margin:18px 0 15px;color:#17365f;font:800 20px var(--font-display)}.aqua-tour__answer{display:flex;align-items:center;gap:9px;width:100%;min-height:39px;margin:7px 0;padding:0 11px;border:1px solid #e0ebf5;border-radius:9px;background:#fff;color:#365579;text-align:left;font-size:11px}.aqua-tour__answer b{width:16px}.aqua-tour__answer span{display:grid;place-items:center;width:16px;height:16px;border:1px solid #b8cce1;border-radius:50%;color:#fff}.aqua-tour__answer span i{width:6px;height:6px;border-radius:50%;background:transparent}.aqua-tour__answer.is-selected{border-color:#287ef0;background:#f2f8ff;box-shadow:0 5px 15px #287ef01a}.aqua-tour__answer.is-selected span{border-color:#287ef0;background:#287ef0}.aqua-tour__answer.is-correct{border-color:#3cbf80;background:#effbf5}.aqua-tour__submit{display:inline-flex;align-items:center;gap:5px;min-height:37px;margin-top:13px;padding:0 15px;border:0;border-radius:9px;background:#dbe9f7;color:#8aa0ba;font-size:11px;font-weight:800}.aqua-tour__submit.is-enabled{background:#287ef0;color:#fff}.aqua-tour__feedback{margin:11px 0 0;color:#1a9662;font-size:11px;font-weight:700}.aqua-tour__ask-demo{display:grid;grid-template-columns:1.08fr .92fr;gap:13px;height:100%;padding:14px;border:1px solid #d6e5f4;border-radius:19px;background:#ffffffe6;box-shadow:0 17px 32px #3d6ea114}.aqua-tour__lesson-mini{position:relative;padding:16px;border:1px solid #e0ebf5;border-radius:14px;color:#17365f}.aqua-tour__lesson-badge{display:inline-flex;padding:5px 7px;border-radius:6px;background:#e5f2ff;color:#287ef0;font-size:9px;font-weight:800}.aqua-tour__lesson-mini h3{margin:12px 0 13px;font:800 16px/1.18 var(--font-display)}.aqua-tour__lesson-tabs{display:flex;gap:20px;padding-bottom:8px;border-bottom:1px solid #e3edf7;color:#8ca0b9;font-size:10px}.aqua-tour__lesson-tabs b{padding-bottom:8px;margin-bottom:-9px;border-bottom:2px solid #287ef0;color:#287ef0}.aqua-tour__lesson-mini p{color:#5f789d;font-size:11px;line-height:1.55}.aqua-tour__lesson-mini mark{padding:1px 2px;border-radius:3px;background:transparent;color:inherit}.aqua-tour__lesson-mini mark.is-selected{background:#bedeff;color:#145bc1}.aqua-tour__ask-popup{position:absolute;left:17px;bottom:18px;display:inline-flex;align-items:center;gap:6px;padding:8px 10px;border:1px solid #b7d7fb;border-radius:8px;background:#fff;color:#287ef0;font-size:10px;font-weight:800;box-shadow:0 7px 14px #287ef01a}.aqua-tour__ask-popup img{width:16px;height:18px}.aqua-tour__chat-mini{display:flex;flex-direction:column;min-width:0;padding:13px;border:1px solid #d5e6f8;border-radius:14px;background:#fafdff}.aqua-tour__chat-mini header{display:flex;align-items:center;gap:7px;padding-bottom:10px;border-bottom:1px solid #e3edf7;color:#17365f;font-size:11px}.aqua-tour__chat-mini header img{width:21px;height:23px}.aqua-tour__chat-mini header span{margin-left:auto;color:#8ba0b8}.aqua-tour__chat-placeholder{display:grid;flex:1;place-items:center;padding:18px;color:#8aa0ba;font-size:11px;text-align:center}.aqua-tour__chat-user{align-self:flex-end;margin-top:14px;padding:8px 9px;border-radius:9px 9px 2px;background:#dcebff;color:#215594;font-size:10px}.aqua-tour__chat-answer{display:flex;gap:7px;margin-top:14px;padding:9px;border-radius:9px;background:#fff;color:#5f789d;font-size:10px;line-height:1.45}.aqua-tour__chat-answer img{width:19px;height:21px;flex:0 0 auto}.aqua-tour__chat-answer p{margin:0}.aqua-tour__chat-input{display:flex;align-items:center;justify-content:space-between;margin-top:auto;padding:8px 9px;border:1px solid #dce9f5;border-radius:8px;color:#93a7bf;font-size:9px}.aqua-tour__chat-input svg{color:#287ef0}.aqua-tour__thinking-dots{display:inline-flex;gap:3px;margin-left:4px}.aqua-tour__thinking-dots i{width:4px;height:4px;border-radius:50%;background:#287ef0;animation:aqua-tour-dot .9s infinite}.aqua-tour__thinking-dots i:nth-child(2){animation-delay:.12s}.aqua-tour__thinking-dots i:nth-child(3){animation-delay:.24s}.aqua-tour__mastery-demo{display:flex;flex-direction:column;gap:18px;height:100%;padding:22px;border:1px solid #d6e5f4;border-radius:19px;background:#ffffffe6;box-shadow:0 17px 32px #3d6ea114}.aqua-tour__mistake{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:17px;border:1px solid #f0d7bf;border-radius:14px;background:#fffaf5}.aqua-tour__mistake-label{color:#df8a3c;font-size:10px;font-weight:800;text-transform:uppercase}.aqua-tour__mistake h3{margin:7px 0;color:#17365f;font:800 17px var(--font-display)}.aqua-tour__mistake p{margin:0;color:#6e86a5;font-size:10px}.aqua-tour__mistake p span{color:#df7954;font-weight:800}.aqua-tour__mistake button{display:inline-flex;align-items:center;gap:5px;flex:0 0 auto;padding:9px 11px;border:1px solid #a9cff7;border-radius:8px;background:#fff;color:#287ef0;font-size:10px;font-weight:800}.aqua-tour__mistake.is-retried{border-color:#b8dbfa;background:#f3f9ff}.aqua-tour__flow,.aqua-tour__mastery-flow{display:flex;align-items:center;justify-content:center;gap:10px;color:#a2b4c8;font-size:11px;font-weight:800}.aqua-tour__mastery-flow span{padding:7px 10px;border-radius:999px;background:#f1f5f9}.aqua-tour__mastery-flow span.is-active{background:#e4f1ff;color:#287ef0}.aqua-tour__mastery-flow span.is-mastered{background:#e6f8ef;color:#188d5d}.aqua-tour__progress-card{display:flex;align-items:center;gap:20px;margin-top:auto;padding:19px;border-radius:14px;background:#f7fbff}.aqua-tour__progress-ring{display:grid;place-items:center;width:112px;height:112px;flex:0 0 auto;border-radius:50%;background:conic-gradient(#287ef0 var(--progress),#dceafb 0);color:#17365f}.aqua-tour__progress-ring:before{position:absolute;width:87px;height:87px;border-radius:50%;background:#f7fbff;content:""}.aqua-tour__progress-ring strong{position:relative;z-index:1;font:800 25px var(--font-display)}.aqua-tour__progress-card>div:last-child{display:grid;gap:6px}.aqua-tour__progress-card span{color:#7189a8;font-size:11px}.aqua-tour__progress-card b{color:#17365f;font-size:13px}.aqua-tour__progress-card small{color:#7f97b3;font-size:10px}.aqua-tour__progress-card small strong{color:#287ef0}.aqua-tour__footer{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:18px;padding:18px 40px 28px}.aqua-tour__skip,.aqua-tour__secondary{min-height:48px;padding:0 22px;border:1px solid #d6e5f4;border-radius:13px;background:#fff;color:#5f789d;font-size:15px;font-weight:800}.aqua-tour__skip{justify-self:start}.aqua-tour__dots{display:flex;align-items:center;gap:13px}.aqua-tour__dots button{width:12px;height:12px;padding:0;border:0;border-radius:50%;background:#cbd8e8;cursor:pointer;transition:transform .18s ease,background-color .18s ease}.aqua-tour__dots button.is-current{width:18px;height:18px;background:#287ef0;transform:scale(1.06)}.aqua-tour__nav{display:flex;justify-content:flex-end;gap:12px}.aqua-tour__secondary,.aqua-tour__primary{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding-inline:19px;border-radius:13px;font-size:15px;font-weight:800}.aqua-tour__secondary{background:#fff}.aqua-tour__secondary:disabled{opacity:.42;cursor:not-allowed}.aqua-tour__primary{border:1px solid #287ef0;background:#287ef0;color:#fff;box-shadow:0 9px 20px #287ef02e}.aqua-tour button:focus-visible{outline:3px solid #8fc3ff;outline-offset:3px}@keyframes aqua-tour-fade{0%{opacity:0}to{opacity:1}}@keyframes aqua-tour-pop{0%{opacity:0;transform:translateY(10px) scale(.97)}to{opacity:1;transform:translateY(0) scale(1)}}@keyframes aqua-tour-content-in{0%{opacity:0;transform:translate(calc(var(--tour-direction, 1) * 20px))}to{opacity:1;transform:translate(0)}}@keyframes aqua-tour-click{0%{opacity:.7;transform:scale(.3)}to{opacity:0;transform:scale(1.25)}}@keyframes aqua-tour-dot{0%,to{opacity:.4;transform:translateY(0)}50%{opacity:1;transform:translateY(-2px)}}@media(max-width:1020px){.aqua-tour__body{grid-template-columns:minmax(260px,.72fr) minmax(0,1.28fr);gap:20px;padding-inline:26px}.aqua-tour__copy h2{font-size:clamp(34px,4vw,49px)}.aqua-tour__copy ul{margin-top:25px;gap:11px;font-size:14px}.aqua-tour__footer{padding-inline:26px}}@media(max-width:760px){.aqua-tour{padding:12px}.aqua-tour__modal{width:100%;height:calc(100dvh - 24px);min-height:0;border-radius:22px}.aqua-tour__header{padding:17px 18px 5px}.aqua-tour__body{display:flex;flex-direction:column;gap:16px;overflow:auto;padding:17px 18px 14px}.aqua-tour__copy{max-width:none}.aqua-tour__copy h2{margin:14px 0 11px;font-size:clamp(31px,9vw,45px)}.aqua-tour__copy>p{font-size:14px;line-height:1.45}.aqua-tour__copy ul{grid-template-columns:1fr;margin-top:15px;gap:8px;font-size:12px}.aqua-tour__copy li svg{width:22px;height:22px;padding:4px}.aqua-tour__demo{min-height:380px;flex:1}.aqua-tour__stage{min-height:360px;height:100%}.aqua-tour__stage-content{inset:42px 10px 12px}.aqua-tour__footer{grid-template-columns:auto 1fr;gap:9px;padding:11px 18px 18px}.aqua-tour__skip{min-height:42px;padding-inline:9px;font-size:12px}.aqua-tour__dots{justify-content:center;gap:8px}.aqua-tour__dots button{width:8px;height:8px}.aqua-tour__dots button.is-current{width:12px;height:12px}.aqua-tour__nav{grid-column:1 / -1;display:grid;grid-template-columns:1fr 1fr}.aqua-tour__secondary,.aqua-tour__primary{min-height:44px;padding-inline:10px;font-size:13px}.aqua-tour__subject-demo{padding:16px 12px}.aqua-tour__subject-grid{gap:7px;margin-top:18px}.aqua-tour__subject-card{grid-template-columns:28px minmax(0,1fr) auto;min-height:73px;gap:5px;padding:8px}.aqua-tour__subject-icon{width:28px;height:28px;border-radius:8px}.aqua-tour__subject-card strong{font-size:10px}.aqua-tour__subject-card small{font-size:8px}.aqua-tour__subject-card em{right:5px;bottom:-18px;font-size:8px}.aqua-tour__mascot-note{right:11px;bottom:2px;font-size:9px}.aqua-tour__mascot-note img{width:54px;height:59px}.aqua-tour__syllabus-demo{grid-template-columns:94px minmax(0,1fr)}.aqua-tour__syllabus-demo aside{padding:14px 7px}.aqua-tour__syllabus-demo aside span{font-size:8px}.aqua-tour__syllabus-main{padding:15px 10px}.aqua-tour__demo-heading span:first-child{font-size:16px}.aqua-tour__search{display:none}.aqua-tour__unit{margin-top:16px;padding:9px}.aqua-tour__unit strong{font-size:9px}.aqua-tour__modules>div{padding:7px}.aqua-tour__modules p strong{font-size:8px}.aqua-tour__modules button{display:none}.aqua-tour__practice-demo{padding:10px}.aqua-tour__demo-tabs{gap:7px;font-size:8px;overflow:hidden;white-space:nowrap}.aqua-tour__question h3{font-size:17px}.aqua-tour__ask-demo{grid-template-columns:1fr;gap:8px;overflow:auto}.aqua-tour__lesson-mini{min-height:210px}.aqua-tour__chat-mini{min-height:160px}.aqua-tour__mastery-demo{padding:12px}.aqua-tour__mistake{align-items:flex-start;flex-direction:column;gap:10px;padding:12px}.aqua-tour__progress-card{gap:10px;padding:12px}.aqua-tour__progress-ring{width:84px;height:84px}.aqua-tour__progress-ring:before{width:65px;height:65px}.aqua-tour__progress-ring strong{font-size:20px}.aqua-tour__progress-card b{font-size:10px}.aqua-tour__progress-card small{font-size:8px}}@media(prefers-reduced-motion:reduce){.aqua-tour *,.aqua-tour *:before,.aqua-tour *:after{animation-duration:.01ms!important;animation-iteration-count:1!important;scroll-behavior:auto!important;transition-duration:.01ms!important}}.aqua-tour-open .aqua-chat,.aqua-tour-open .aqua-diagnostics{visibility:hidden;opacity:0;pointer-events:none}.aqua-tour__modal{display:grid;grid-template-rows:auto minmax(0,1fr) auto;width:min(1500px,88vw);height:min(860px,86vh);min-height:0}.aqua-tour__header{min-height:70px;padding:18px 34px 8px}.aqua-tour__body{grid-template-columns:minmax(280px,.58fr) minmax(0,1fr);gap:32px;min-height:0;padding:18px 40px 22px}.aqua-tour__copy{max-width:420px}.aqua-tour__copy h2{margin:20px 0 18px;font-size:clamp(42px,3.25vw,56px);line-height:1.02}.aqua-tour__copy>p{font-size:16px;line-height:1.55}.aqua-tour__copy ul{gap:14px;margin-top:28px;font-size:15px}.aqua-tour__demo{min-height:0;height:100%}.aqua-tour__stage{display:grid;grid-template-rows:48px minmax(0,1fr);height:100%;min-height:0}.aqua-tour__stage-toolbar{position:static;padding:0 18px;border-bottom:1px solid rgba(211,229,245,.85);background:#ffffff57}.aqua-tour__stage-viewport{position:relative;min-height:0;overflow:hidden;padding:18px 20px 20px}.aqua-tour__stage-viewport>*:not(.aqua-tour__cursor){min-height:0}.aqua-tour__cursor{position:absolute;z-index:20;left:0;top:0;width:28px;height:34px;opacity:0;pointer-events:none;transform-origin:3px 3px;transition:opacity .24s ease;will-change:transform}.aqua-tour__cursor.is-visible{opacity:1}.aqua-tour__cursor.is-clicking .aqua-tour__cursor-svg{animation:aqua-tour-cursor-click .19s ease-out both}.aqua-tour__cursor.is-dragging .aqua-tour__cursor-svg{filter:drop-shadow(0 2px 4px rgba(40,126,240,.28))}.aqua-tour__cursor-svg{display:block;width:26px;height:32px;overflow:visible;filter:drop-shadow(0 2px 3px rgba(21,54,95,.2))}.aqua-tour__cursor-svg path{fill:#fff;stroke:#17365f;stroke-width:1.8;stroke-linejoin:round}.aqua-tour__click-ring{position:absolute;left:-1px;top:-1px;width:25px;height:25px;border:2px solid #5eaeff;border-radius:50%;opacity:0;transform:scale(.35)}.aqua-tour__cursor.is-clicking .aqua-tour__click-ring{animation:aqua-tour-click .36s ease-out both}.aqua-tour__status-pill{position:absolute;z-index:3;left:50%;bottom:19px;display:inline-flex;align-items:center;gap:6px;padding:8px 11px;border:1px solid #b8dcfb;border-radius:999px;background:#f3faff;color:#287ef0;font-size:11px;font-weight:800;transform:translate(-50%);box-shadow:0 8px 18px #287ef01a;animation:aqua-tour-pill-in .26s ease-out both}.aqua-tour__subject-card.is-hovered{transition-duration:.42s}.aqua-tour__subject-card.is-opened small.is-available{color:#287ef0}.aqua-tour__syllabus-demo{min-height:0;height:100%}.aqua-tour__syllabus-main{min-height:0;overflow:hidden}.aqua-tour__modules{min-height:0}.aqua-tour__success{animation:aqua-tour-success-in .26s ease-out both}.aqua-tour__practice-demo{padding:10px 14px}.aqua-tour__demo-tabs{padding-bottom:8px}.aqua-tour__demo-tabs b{padding-bottom:7px;margin-bottom:-9px}.aqua-tour__question{margin-top:10px}.aqua-tour__question h3{margin:11px 0 9px;font-size:17px}.aqua-tour__answer{min-height:31px;margin:4px 0;padding-inline:10px;font-size:10px}.aqua-tour__submit{min-height:32px;margin-top:6px;padding-inline:13px;font-size:10px}.aqua-tour__question-footer{display:flex;align-items:center;gap:12px;min-height:40px;margin-top:6px}.aqua-tour__question-footer>span{color:#1a9662;font-size:10px;font-weight:700}.aqua-tour__answer{position:relative;transition:border-color .28s ease,background-color .28s ease,box-shadow .28s ease}.aqua-tour__answer em{margin-left:auto;color:#188d5d;font-size:10px;font-style:normal;font-weight:800;animation:aqua-tour-pill-in .26s ease-out both}.aqua-tour__ask-demo{min-height:0;height:100%;padding:16px}.aqua-tour__lesson-mini{min-height:0;overflow:hidden}.aqua-tour__lesson-mini mark{background:linear-gradient(90deg,#bedeff var(--selection-progress),transparent var(--selection-progress));transition:background 90ms linear}.aqua-tour__ask-popup{z-index:5;animation:aqua-tour-popup-in .18s ease-out both}.aqua-tour__chat-mini{min-height:0;overflow:hidden;transition:transform .6s cubic-bezier(.22,1,.36,1),opacity .35s ease,box-shadow .45s ease;transform-origin:right bottom}.aqua-tour__chat-mini.is-collapsed{align-self:end;height:46px;min-height:46px;border-color:#b9dafa;background:#fff;transform:translateY(8px)}.aqua-tour__chat-mini.is-collapsed header{border:0;padding:0}.aqua-tour__chat-mini.is-collapsed header span{display:none}.aqua-tour__chat-mini.is-collapsed .aqua-tour__chat-collapsed-label{display:block;padding:9px 0 0 29px;color:#7b94b3;font-size:10px}.aqua-tour__chat-mini.is-open{box-shadow:0 17px 32px #3d6ea121;transform:translateY(0) scale(1)}.aqua-tour__chat-body{min-height:0;flex:1;overflow:hidden}.aqua-tour__chat-user{animation:aqua-tour-message-in .3s ease-out both}.aqua-tour__chat-answer{animation:aqua-tour-message-in .32s .28s ease-out both}.aqua-tour__chat-input{flex:0 0 auto}.aqua-tour__mastery-demo{min-height:0;height:100%;overflow:hidden}.aqua-tour__mistake{flex:0 0 auto}.aqua-tour__retry-question{display:grid;gap:7px;padding:0 5px;animation:aqua-tour-content-in .3s ease-out both}.aqua-tour__retry-question span{display:flex;align-items:center;min-height:27px;padding:0 9px;border:1px solid #e0ebf5;border-radius:7px;background:#fff;color:#54729b;font-size:10px}.aqua-tour__retry-question span.is-selected{border-color:#4abd84;background:#effbf5;color:#188d5d}.aqua-tour__retry-question svg{margin-left:auto}.aqua-tour__progress-ring{position:relative;transition:background .12s linear}.aqua-tour__progress-card{flex:0 0 auto}.aqua-tour__footer{min-height:92px;padding:18px 40px 24px;border-top:1px solid #e8f0f7}@keyframes aqua-tour-cursor-click{0%{transform:scale(1)}45%{transform:scale(.86)}to{transform:scale(1)}}@keyframes aqua-tour-pill-in{0%{opacity:0;transform:translate(-50%,5px)}to{opacity:1;transform:translate(-50%)}}@keyframes aqua-tour-success-in{0%{opacity:0;transform:translateY(5px)}to{opacity:1;transform:translateY(0)}}@keyframes aqua-tour-popup-in{0%{opacity:0;transform:scale(.96) translateY(3px)}to{opacity:1;transform:scale(1) translateY(0)}}@keyframes aqua-tour-message-in{0%{opacity:0;transform:translateY(7px)}to{opacity:1;transform:translateY(0)}}@media(max-width:1020px){.aqua-tour__body{grid-template-columns:minmax(260px,.55fr) minmax(0,1fr);gap:20px;padding-inline:26px}.aqua-tour__copy h2{font-size:clamp(38px,4vw,49px)}.aqua-tour__footer{padding-inline:26px}}@media(max-width:760px){.aqua-tour__modal{width:100%;height:calc(100dvh - 24px)}.aqua-tour__body{display:flex;flex-direction:column;gap:14px;padding:14px 18px 12px;overflow:auto}.aqua-tour__copy{flex:0 0 auto}.aqua-tour__copy h2{margin:12px 0 9px;font-size:clamp(31px,9vw,44px)}.aqua-tour__copy>p{font-size:13px;line-height:1.4}.aqua-tour__copy ul{gap:7px;margin-top:13px;font-size:12px}.aqua-tour__demo{min-height:370px;flex:1 1 370px}.aqua-tour__stage-viewport{padding:12px 10px 14px}.aqua-tour__footer{grid-template-columns:auto 1fr;min-height:108px;padding:10px 18px 17px}.aqua-tour__ask-demo{grid-template-columns:1fr;gap:8px;overflow:auto}.aqua-tour__chat-mini.is-collapsed{height:42px;min-height:42px}.aqua-tour__chat-mini.is-open{min-height:170px}.aqua-tour__subject-demo{padding:16px 12px}.aqua-tour__subject-grid{gap:7px;margin-top:18px}.aqua-tour__subject-card{min-height:73px;gap:5px;padding:8px}.aqua-tour__status-pill{bottom:13px;font-size:9px}.aqua-tour__syllabus-demo{grid-template-columns:94px minmax(0,1fr)}.aqua-tour__syllabus-main{padding:15px 10px}.aqua-tour__modules button{display:none}.aqua-tour__question-footer>span{font-size:9px}.aqua-tour__mastery-demo{padding:12px}}.aqua-lab{--lab-bg:#f4f8fc;--lab-panel:#ffffff;--lab-ink:#0b1d3a;--lab-muted:#64748b;--lab-line:#dce8f2;--lab-blue:#5db7ff;min-height:100dvh;background:var(--lab-bg);color:var(--lab-ink);font-family:var(--font-body);overflow:hidden}.lab-header{height:78px;padding:0 24px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--lab-line);background:#fffffff0}.lab-header>div:first-child{display:flex;align-items:center;gap:12px}.lab-mark{display:grid;place-items:center;width:42px;height:46px}.lab-mark img{width:100%;height:100%}.lab-header p,.preview-toolbar p,.controls-panel__head p{margin:0;color:#368dc9;font-size:10px;font-weight:700;letter-spacing:.13em}.lab-header h1{margin:1px 0 0;font:700 24px/1 var(--font-display);letter-spacing:-.03em}.lab-header__actions{display:flex;gap:8px}.lab-button{min-height:42px;padding:0 15px;border-radius:12px;border:1px solid var(--lab-line);font-weight:700;font-size:13px;transition:transform .16s var(--ease-out),background .16s,border-color .16s}.lab-button:hover{transform:translateY(-1px);border-color:#b8d8ef}.lab-button:active{transform:scale(.98)}.lab-button--ghost{background:#fff}.lab-button--primary{display:flex;align-items:center;gap:7px;background:var(--lab-ink);color:#fff;border-color:var(--lab-ink)}.lab-layout{height:calc(100dvh - 78px);display:grid;grid-template-columns:minmax(0,7fr) minmax(360px,3fr)}.preview-panel{min-width:0;display:grid;grid-template-rows:auto minmax(0,1fr) auto;padding:22px 24px 18px;border-right:1px solid var(--lab-line)}.preview-toolbar{display:flex;align-items:end;justify-content:space-between;gap:20px}.preview-toolbar h2,.controls-panel__head h2{margin:3px 0 0;font:700 24px/1.1 var(--font-display);letter-spacing:-.035em}.mode-tabs{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:5px}.mode-tabs button{min-height:34px;padding:0 10px;border:1px solid var(--lab-line);border-radius:10px;background:#ffffffb3;font-size:10px;font-weight:700;color:var(--lab-muted);transition:background .16s,color .16s,border-color .16s,transform .16s}.mode-tabs button:hover{border-color:#afd8f4;color:var(--lab-ink);transform:translateY(-1px)}.mode-tabs button:active{transform:scale(.97)}.mode-tabs button.is-active{background:var(--lab-ink);border-color:var(--lab-ink);color:#fff}.preview-stage{position:relative;min-height:0;margin-top:14px;overflow:hidden;border:1px solid var(--lab-line);border-radius:26px;background:radial-gradient(circle at 50% 52%,rgba(174,225,255,.5) 0 24%,rgba(238,248,255,.78) 24.2% 41%,transparent 41.2%),linear-gradient(180deg,#fbfdff,#eef7fd)}.preview-stage:before{content:"";position:absolute;inset:13% 16%;border:1px dashed rgba(93,183,255,.24);border-radius:50%;transform:rotate(-7deg)}.lab-scene{position:absolute;inset:0;--pointer-x:50%;--pointer-y:50%}.scene-orbit{position:absolute;left:50%;top:49%;width:min(55vw,620px);aspect-ratio:1;border:1px solid rgba(93,183,255,.12);border-radius:50%;transform:translate(-50%,-50%)}.character-position{position:absolute;z-index:3;left:50%;top:48%;width:clamp(330px,35vw,520px);aspect-ratio:1;translate:-50% -50%;transform-origin:center 70%;will-change:transform}.character-float{width:100%;height:100%;transform-origin:center 74%}.character-float--enabled{animation:lab-float var(--float-duration) var(--ease-in-out) infinite}.character-lean{position:relative;width:100%;height:100%;transform-origin:center 76%;will-change:transform}.aqua-layer{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;-webkit-user-select:none;user-select:none;pointer-events:none}.aqua-base-layer{filter:drop-shadow(0 24px 18px rgba(36,133,204,.17))}.eye-mask{position:absolute;z-index:3;inset:0;pointer-events:none}.eye-mask img{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;will-change:transform}.eye-mask--left{clip-path:ellipse(3.3% 6% at 40.8% 49%)}.eye-mask--right{clip-path:ellipse(3.2% 6% at 63% 50.1%)}.eyelid{position:absolute;z-index:4;width:6.7%;height:12.2%;border-radius:50%;background:linear-gradient(180deg,#63bcf7,#59b4f3);transform:scaleY(0);transform-origin:top;pointer-events:none}.eyelid--left{left:37.5%;top:43%}.eyelid--right{left:59.7%;top:44.1%}.eyelid--blink{animation:eyelid-blink var(--blink-duration) var(--ease-in-out) both}.aqua-platform{position:absolute;z-index:2;left:50%;bottom:8%;width:42%;height:9%;translate:-50% 0;border-radius:50%;background:linear-gradient(180deg,#fff,#dceaff);box-shadow:0 18px 28px #3680dc38;transform-origin:center}.aqua-platform span{position:absolute;inset:0;border:1px solid rgba(255,255,255,.9);border-radius:inherit;transform:translateY(-12%)}.stage-node{position:absolute;z-index:5;display:grid;place-items:center;width:68px;height:68px;border:1px solid rgba(168,210,240,.72);border-radius:50%;background:#ffffffe0;box-shadow:0 9px 22px #0b1d3a0f;color:#328ed0}.stage-node span{position:absolute;top:71px;color:#42658e;font-size:10px;font-weight:700}.stage-node--motion{left:15%;top:15%}.stage-node--waves{left:11%;bottom:22%}.stage-node--forces{right:13%;top:17%}.stage-node--energy{right:10%;bottom:22%}.live-values{display:grid;grid-template-columns:repeat(3,minmax(0,1fr)) auto;align-items:center;gap:10px;padding:14px 4px 0}.live-values>div:not(.fps-badge){display:grid;border-right:1px solid var(--lab-line)}.live-values span{font-size:9px;color:var(--lab-muted)}.live-values strong{margin-top:1px;font:600 11px var(--font-display)}.fps-badge{display:flex;align-items:center;gap:7px;font-size:10px;color:var(--lab-muted)}.fps-badge span{width:7px;height:7px;border-radius:50%;background:#42c88a;box-shadow:0 0 0 4px #42c88a1a}.controls-panel{min-width:0;overflow-y:auto;padding:22px 20px 40px;background:var(--lab-panel);scrollbar-width:thin;scrollbar-color:#c4d8e7 transparent}.controls-panel__head{display:flex;align-items:end;justify-content:space-between;padding:0 3px 16px}.controls-panel__head>span{padding:5px 8px;border-radius:999px;background:#eaf7ff;color:#237ebf;font-size:9px;font-weight:700}.preset-row{display:flex;align-items:center;justify-content:space-between;padding:11px 12px;margin-bottom:10px;border:1px solid var(--lab-line);border-radius:14px;background:#f8fbfd}.preset-row>span{font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:.08em;color:var(--lab-muted)}.preset-row>div{display:flex;gap:4px}.preset-row button{padding:6px 8px;border:1px solid var(--lab-line);border-radius:8px;background:#fff;font-size:9px;text-transform:capitalize}.preset-row button:hover{border-color:#93caef;background:#eef8ff}.control-stack{display:grid;gap:9px}.control-section{border:1px solid var(--lab-line);border-radius:15px;background:#fff;overflow:hidden}.control-section summary{list-style:none;display:flex;align-items:center;justify-content:space-between;min-height:46px;padding:0 12px;font:700 12px var(--font-display);cursor:pointer}.control-section summary::-webkit-details-marker{display:none}.section-actions{display:flex;align-items:center;gap:7px;color:#8aa0b2}.section-actions button{display:grid;place-items:center;width:29px;height:29px;border:0;border-radius:8px;background:transparent;color:inherit}.section-actions button:hover{background:#eef7fd;color:#247fbd}.control-section[open] summary>.section-actions>svg{transform:rotate(180deg)}.control-section__body{display:grid;gap:14px;padding:12px;border-top:1px solid #edf2f6;background:#fbfdfe}.control-subhead{margin-top:3px;padding-top:11px;border-top:1px solid #e8eff5;color:#3487c2;font-size:9px;font-weight:700;text-transform:uppercase;letter-spacing:.11em}.control-divider{height:1px;background:#e8eff5}.lab-slider{display:grid;gap:7px}.lab-slider__head{display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:10px;font-weight:600;color:#40546b}.lab-number{display:flex;align-items:center;gap:4px}.lab-number input{width:64px;height:28px;padding:0 7px;border:1px solid #d7e4ee;border-radius:8px;background:#fff;color:var(--lab-ink);font:600 10px var(--font-display);text-align:right}.lab-number small{min-width:16px;color:#8192a4;font-size:9px}.range-input{width:100%;height:18px;margin:0;appearance:none;background:transparent;cursor:pointer}.range-input::-webkit-slider-runnable-track{height:4px;border-radius:999px;background:linear-gradient(90deg,var(--lab-blue) 0 var(--range-progress),#dce8ef var(--range-progress) 100%)}.range-input::-webkit-slider-thumb{appearance:none;width:16px;height:16px;margin-top:-6px;border:3px solid white;border-radius:50%;background:#2899e7;box-shadow:0 2px 7px #257ab952}.range-input::-moz-range-track{height:4px;border-radius:999px;background:#dce8ef}.range-input::-moz-range-progress{height:4px;border-radius:999px;background:var(--lab-blue)}.range-input::-moz-range-thumb{width:12px;height:12px;border:3px solid white;border-radius:50%;background:#2899e7;box-shadow:0 2px 7px #257ab952}.lab-toggle{display:flex;align-items:center;justify-content:space-between;min-height:34px;font-size:10px;font-weight:600;color:#40546b;cursor:pointer}.lab-toggle input{position:absolute;opacity:0;pointer-events:none}.lab-toggle__track{position:relative;width:34px;height:20px;border-radius:999px;background:#d8e3eb;transition:background .16s}.lab-toggle__track span{position:absolute;left:3px;top:3px;width:14px;height:14px;border-radius:50%;background:#fff;box-shadow:0 1px 4px #0b1d3a33;transition:transform .16s}.lab-toggle input:checked+.lab-toggle__track{background:var(--lab-blue)}.lab-toggle input:checked+.lab-toggle__track span{transform:translate(14px)}.lab-toggle input:focus-visible+.lab-toggle__track{outline:3px solid var(--lab-ink);outline-offset:2px}.lab-select{display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:10px;font-weight:600;color:#40546b}.lab-select select{height:30px;border:1px solid #d7e4ee;border-radius:8px;background:#fff;color:var(--lab-ink);font-size:10px}.aqua-center-mark{position:absolute;z-index:7;left:50%;top:50%;width:24px;height:24px;transform:translate(-50%,-50%);border:1px solid #ff5b88;border-radius:50%;pointer-events:none}.aqua-center-mark span:first-child{position:absolute;left:50%;top:-8px;bottom:-8px;border-left:1px solid #ff5b88}.aqua-center-mark span:last-child{position:absolute;top:50%;left:-8px;right:-8px;border-top:1px solid #ff5b88}.eye-debug{position:absolute;z-index:7;width:6.8%;height:12.3%;border:1px dashed #ff5b88;border-radius:50%;pointer-events:none}.eye-debug--left{left:37.4%;top:43%}.eye-debug--right{left:59.7%;top:44.1%}.eye-debug span{position:absolute;left:50%;top:50%;width:4px;height:4px;border-radius:50%;background:#ff5b88;transform:translate(-50%,-50%)}.debug-vector{position:absolute;z-index:7;inset:25%;width:50%;height:50%;overflow:visible;pointer-events:none}.debug-vector path{stroke:#ff5b88;stroke-width:.6;stroke-dasharray:2 2}.debug-vector circle{fill:#ff5b88}.scene-pointer-dot{position:absolute;z-index:9;left:var(--pointer-x);top:var(--pointer-y);width:8px;height:8px;border:2px solid white;border-radius:50%;background:#ff5b88;box-shadow:0 2px 8px #ff5b8866;transform:translate(-50%,-50%);pointer-events:none}@keyframes lab-float{0%,to{transform:translateY(0) rotate(calc(var(--float-rotation) * -1))}50%{transform:translateY(calc(var(--float-y) * -1)) rotate(var(--float-rotation))}}@keyframes eyelid-blink{0%,to{transform:scaleY(0)}45%,55%{transform:scaleY(1)}}@media(max-width:980px){.aqua-lab{overflow:auto}.lab-layout{height:auto;grid-template-columns:1fr}.preview-panel{height:760px;border-right:0;border-bottom:1px solid var(--lab-line)}.controls-panel{overflow:visible}.character-position{width:min(520px,58vw)}}@media(max-width:640px){.lab-header{height:auto;min-height:72px;padding:10px 14px}.lab-header__actions .lab-button--ghost{display:none}.lab-layout{height:auto}.preview-panel{height:700px;padding:16px 12px}.preview-toolbar{display:grid}.mode-tabs{justify-content:flex-start;flex-wrap:nowrap;overflow-x:auto;padding-bottom:4px}.mode-tabs button{white-space:nowrap}.stage-node{display:none}.character-position{width:min(480px,96vw)}.aqua-platform{width:68%}.live-values{grid-template-columns:repeat(3,minmax(0,1fr))}.fps-badge{display:none}.controls-panel{padding:20px 12px 40px}}@media(prefers-reduced-motion:reduce){.character-float--enabled,.eyelid--blink{animation:none}.lab-button,.mode-tabs button{transition:none}}.celebration-preview{min-height:100dvh;padding:22px;overflow:hidden;background:radial-gradient(circle at 50% 34%,#f5fbff 0 19%,#e9f6ff 42%,#ddecfa);color:var(--color-home-ink)}.celebration-preview__header{display:flex;align-items:center;justify-content:space-between;width:min(900px,100%);margin:auto;color:#55708f;font-size:12px;font-weight:750}.celebration-preview__header a{display:inline-flex;align-items:center;gap:6px;color:inherit;text-decoration:none}.celebration-preview__header a:hover{color:var(--color-home-accent-hover)}.celebration-preview__header span{display:inline-flex;align-items:center;gap:7px;color:#2d7eb8;font-size:10px;letter-spacing:.12em}.celebration-preview__header i{width:7px;height:7px;border-radius:50%;background:#4eca90;box-shadow:0 0 0 4px #4eca901c}.celebration-preview__hero{width:min(620px,100%);margin:clamp(26px,5vh,55px) auto 22px;text-align:center}.celebration-preview__eyebrow{display:inline-flex;align-items:center;gap:7px;color:#2586ce;font-size:10px;font-weight:850;letter-spacing:.13em}.celebration-preview__hero h1{margin:10px 0;font:700 clamp(34px,5vw,54px)/.98 var(--font-display);letter-spacing:-.055em}.celebration-preview__hero h1 em{color:#318fe0;font-style:normal}.celebration-preview__hero p{max-width:520px;margin:auto;color:#607a98;font-size:13px;line-height:1.55}.celebration-preview__canvas{position:relative;width:min(700px,100%);height:min(390px,43vh);min-height:290px;margin:auto;overflow:hidden;border:1px solid #cce4f6;border-radius:26px;background:linear-gradient(160deg,#fff,#f7fcff 54%,#eaf7ff);box-shadow:0 24px 60px #1b67a41f}.celebration-preview__grid{position:absolute;inset:0;opacity:.4;background-image:linear-gradient(#d9edfa 1px,transparent 1px),linear-gradient(90deg,#d9edfa 1px,transparent 1px);background-size:28px 28px;-webkit-mask-image:linear-gradient(to bottom,#000,transparent 72%);mask-image:linear-gradient(to bottom,#000,transparent 72%)}.celebration-preview__frame-label{position:absolute;z-index:5;top:17px;left:19px;padding:7px 9px;border:1px solid #d4e8f7;border-radius:9px;background:#ffffffdb;color:#347fb8;font-size:9px;font-weight:850;letter-spacing:.07em}.celebration-preview__frame,.celebration-preview__onion{position:absolute;z-index:3;left:50%;bottom:13px;width:min(355px,65%);height:calc(100% - 42px);object-fit:contain;transform:translate(-50%);filter:drop-shadow(0 14px 14px #287bc525);-webkit-user-select:none;user-select:none}.celebration-preview__onion{z-index:2;opacity:.22;filter:grayscale(.2) drop-shadow(0 14px 14px #287bc515)}.celebration-preview__ground{position:absolute;z-index:1;left:50%;bottom:30px;width:190px;height:15px;border-radius:50%;background:#b5dbf850;transform:translate(-50%);filter:blur(2px)}.celebration-preview__burst{position:absolute;z-index:4;inset:0;pointer-events:none}.celebration-preview__burst i{position:absolute;left:var(--burst-x);top:var(--burst-y);width:7px;height:11px;border-radius:2px;background:#5db7ff;opacity:.9;animation:preview-confetti .65s var(--burst-delay) both}.celebration-preview__burst i:nth-child(3n){background:#f5b94c;width:4px;height:15px}.celebration-preview__burst i:nth-child(4n){background:#78c99a;border-radius:50%;width:7px;height:7px}.celebration-preview__controls{display:grid;grid-template-columns:auto minmax(160px,1fr) auto;align-items:center;gap:16px;width:min(700px,100%);margin:17px auto 0}.celebration-preview__transport{display:flex;gap:7px}.celebration-preview__transport button,.celebration-preview__options button{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:40px;padding:0 12px;border:1px solid #cfe2f3;border-radius:10px;background:#ffffffb8;color:#37617f;font:750 11px var(--font-body);transition:background .16s,border-color .16s,transform .16s}.celebration-preview__transport button:first-child{border-color:#12345c;background:#12345c;color:#fff}.celebration-preview__transport button:hover,.celebration-preview__options button:hover{transform:translateY(-1px);border-color:#91c9ee}.celebration-preview__slider{display:grid;gap:5px;color:#62809c;font-size:10px;font-weight:700}.celebration-preview__slider span{display:flex;justify-content:space-between}.celebration-preview__slider b{color:#217dbb}.celebration-preview__slider input{width:100%;accent-color:#2e94dc}.celebration-preview__options{display:grid;justify-items:end;gap:7px;color:#587692;font-size:10px;font-weight:700}.celebration-preview__options>div{display:flex;gap:4px}.celebration-preview__options button{min-height:28px;padding:0 8px;border-radius:8px}.celebration-preview__options button.is-selected{border-color:#5aaef0;background:#e5f5ff;color:#207abb}.celebration-preview__options label{display:flex;align-items:center;gap:5px;white-space:nowrap}.celebration-preview__options input{accent-color:#2e94dc}.celebration-preview__notes{display:flex;justify-content:center;gap:18px;width:min(700px,100%);margin:19px auto 0;color:#6b839a;font-size:10px}.celebration-preview__notes span{padding-right:18px;border-right:1px solid #cfe2f1}.celebration-preview__notes span:last-child{padding:0;border:0}.celebration-preview__notes b{color:#237dbb}@keyframes preview-confetti{0%{opacity:0;transform:translateY(7px) rotate(0)}to{opacity:.9;transform:translateY(0) rotate(160deg)}}@media(max-width:620px){.celebration-preview{padding:16px 12px}.celebration-preview__hero{margin-top:38px}.celebration-preview__canvas{height:350px}.celebration-preview__controls{grid-template-columns:1fr}.celebration-preview__transport{justify-content:center}.celebration-preview__options{justify-items:center}.celebration-preview__notes{gap:9px}.celebration-preview__notes span{padding-right:9px}}@media(prefers-reduced-motion:reduce){.celebration-preview *{transition:none}.celebration-preview__burst i{animation:none}}.aqua-shell{display:flex;flex-direction:column;width:100%;max-width:420px;height:min(620px,calc(100dvh - 76px));min-width:0;overflow:hidden;overflow-x:hidden;border:1px solid var(--chat-color-rule);border-radius:var(--chat-radius-panel);background:var(--chat-color-surface);color:var(--chat-color-ink);box-shadow:var(--chat-shadow-panel);font-family:var(--font-body)}.aqua-shell *{box-sizing:border-box}.aqua-shell button,.aqua-shell textarea{max-width:100%;font:inherit}.aqua-shell__header{display:flex;flex:0 0 auto;align-items:center;gap:var(--space-sm);min-width:0;min-height:86px;padding:var(--space-md);border-bottom:1px solid var(--chat-color-rule);background:var(--chat-color-surface)}.aqua-shell__brand{display:flex;flex:1 1 auto;align-items:center;gap:var(--space-sm);min-width:0}.aqua-shell__brand>span{display:grid;min-width:0;gap:2px}.aqua-shell__brand strong{font:700 var(--text-md)/1.1 var(--font-display);letter-spacing:-.025em;white-space:nowrap}.aqua-shell__brand small{display:block;min-width:0;overflow:hidden;color:var(--chat-color-muted);font-size:var(--text-xs);text-overflow:ellipsis;white-space:nowrap}.aqua-shell__avatar{display:grid;place-items:center;flex:0 0 36px;width:36px;height:36px;border-radius:var(--chat-radius-avatar);background:var(--chat-color-accent-soft)}.aqua-shell__avatar img{display:block;max-width:100%;width:29px;height:32px;object-fit:contain}.aqua-shell__header-actions{display:flex;flex:0 0 auto;align-items:center;gap:var(--space-xs);min-width:0}.aqua-shell__state{display:inline-flex;flex:0 0 auto;align-items:center;gap:5px;padding:5px 8px;border-radius:var(--radius-pill);background:var(--chat-color-paper);color:var(--chat-color-muted-strong);font-size:10px;font-weight:700;white-space:nowrap}.aqua-shell__state i{flex:0 0 6px;width:6px;height:6px;border-radius:50%;background:currentColor;opacity:.72}.aqua-shell__state.is-ready{background:var(--chat-color-ready-soft);color:var(--chat-color-ready)}.aqua-shell__icon-button{display:grid;place-items:center;flex:0 0 44px;width:44px;height:44px;padding:0;border:0;border-radius:var(--radius-pill);background:transparent;color:var(--chat-color-muted);cursor:pointer;transition:background-color var(--dur-fast) var(--ease-out),transform .1s var(--ease-out)}.aqua-shell__messages{flex:1 1 auto;min-width:0;min-height:0;overflow-x:hidden;overflow-y:auto;overscroll-behavior:contain;padding:var(--space-lg) var(--space-md) 20px;scrollbar-width:thin;scrollbar-color:var(--chat-color-scroll) transparent}.aqua-shell__welcome{display:flex;flex-direction:column;align-items:flex-start;min-width:0;max-width:100%;padding:0 var(--space-xs)}.aqua-shell__welcome>.aqua-shell__avatar{width:48px;height:48px}.aqua-shell__welcome>.aqua-shell__avatar img{width:38px;height:42px}.aqua-shell__welcome h2{max-width:100%;margin:var(--space-md) 0 var(--space-xs);font:700 25px/1.12 var(--font-display);letter-spacing:-.035em;overflow-wrap:break-word}.aqua-shell__welcome>p{max-width:31ch;margin:0;color:var(--chat-color-muted);font-size:14px;line-height:1.55;overflow-wrap:break-word}.aqua-shell__suggestions{display:grid;width:100%;max-width:100%;min-width:0;gap:var(--space-xs);margin-top:var(--space-lg)}.aqua-shell__suggestions button{width:100%;max-width:100%;min-width:0;min-height:44px;padding:9px 12px;border:1px solid var(--chat-color-rule);border-radius:var(--chat-radius-control);background:var(--chat-color-surface);color:var(--chat-color-muted-strong);font-size:12px;font-weight:600;text-align:left;white-space:normal;word-break:normal;overflow-wrap:break-word;cursor:pointer;transition:background-color var(--dur-fast) var(--ease-out),transform .1s var(--ease-out)}.aqua-shell__message{display:flex;width:100%;max-width:100%;min-width:0;margin-bottom:var(--space-lg)}.aqua-shell__message--user{justify-content:flex-end}.aqua-shell__message--user>div{max-width:80%;min-width:0;padding:11px 14px;border-radius:18px 18px 5px;background:var(--chat-color-user);color:var(--chat-color-ink);font-size:14px;line-height:1.5;overflow-wrap:break-word}.aqua-shell__message--assistant{align-items:flex-start;gap:var(--space-sm)}.aqua-shell__message--assistant>.aqua-shell__avatar{flex-basis:32px;width:32px;height:32px}.aqua-shell__message--assistant>.aqua-shell__avatar img{width:25px;height:28px}.aqua-shell__assistant-body{min-width:0;max-width:calc(100% - 40px);padding-top:2px}.aqua-shell__assistant-name{display:block;margin-bottom:6px;color:var(--chat-color-muted-strong);font:700 11px/1 var(--font-display)}.aqua-shell__answer-copy{display:grid;max-width:100%;min-width:0;gap:var(--space-sm);color:var(--chat-color-ink);font-size:14px;line-height:1.62;overflow-wrap:break-word}.aqua-shell__answer-copy p,.aqua-shell__answer-copy ul{max-width:100%;margin:0}.aqua-shell__answer-copy ul{display:grid;gap:6px;padding-inline-start:18px}.aqua-shell__answer-copy strong{font-weight:700}.aqua-shell__thinking{max-width:100%;min-width:0;padding:12px 14px;border:1px solid var(--chat-color-rule);border-radius:var(--chat-radius-message);background:var(--chat-color-paper)}.aqua-shell__thinking>div{display:flex;align-items:center;gap:var(--space-xs)}.aqua-shell__thinking strong{font-size:12px}.aqua-shell__thinking p{margin:6px 0 0;color:var(--chat-color-muted);font-size:11px;line-height:1.45}.aqua-shell__thinking-dots{display:flex;gap:3px}.aqua-shell__thinking-dots i{width:4px;height:4px;border-radius:50%;background:var(--chat-color-accent);animation:aqua-shell-dot 1.2s var(--ease-in-out) infinite}.aqua-shell__thinking-dots i:nth-child(2){animation-delay:.12s}.aqua-shell__thinking-dots i:nth-child(3){animation-delay:.24s}.aqua-shell__stream-caret{display:inline-block;width:2px;height:15px;margin-inline-start:3px;background:var(--chat-color-accent);vertical-align:text-bottom;animation:aqua-shell-caret 1s steps(2) infinite}.aqua-shell__sources{max-width:100%;margin-top:var(--space-md);padding-top:var(--space-sm);border-top:1px solid var(--chat-color-rule)}.aqua-shell__sources summary{display:flex;align-items:center;gap:6px;min-width:0;min-height:32px;color:var(--chat-color-muted);font-size:11px;font-weight:650;cursor:pointer;list-style:none}.aqua-shell__sources summary::-webkit-details-marker{display:none}.aqua-shell__sources summary:after{content:"+";margin-inline-start:auto;font-size:14px}.aqua-shell__sources[open] summary:after{content:"−"}.aqua-shell__sources ul{display:grid;max-width:100%;gap:6px;margin:6px 0 0;padding:10px 12px 10px 26px;border-radius:var(--chat-radius-control);background:var(--chat-color-paper);color:var(--chat-color-muted-strong);font-size:11px;line-height:1.4;overflow-wrap:break-word}.aqua-shell__footer{flex:0 0 auto;min-width:0;padding:0 var(--space-md) 14px;background:var(--chat-color-surface)}.aqua-shell__composer{position:relative;display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:end;gap:var(--space-xs);min-width:0;min-height:70px;padding:10px 9px 9px 14px;border:1px solid var(--chat-color-rule-strong);outline:2px solid transparent;outline-offset:1px;border-radius:var(--chat-radius-composer);background:var(--chat-color-surface);box-shadow:var(--chat-shadow-composer)}.aqua-shell__composer:focus-within{outline-color:var(--chat-color-focus)}.aqua-shell__composer.is-disabled{background:var(--chat-color-paper);opacity:.72}.aqua-shell__composer label{grid-column:1/-1;color:var(--chat-color-muted-strong);font-size:10px;font-weight:700}.aqua-shell__composer textarea{width:100%;min-width:0;min-height:34px;max-height:96px;padding:3px 0;border:0;outline:0;resize:none;background:transparent;color:var(--chat-color-ink);font-size:14px;line-height:1.45}.aqua-shell__composer textarea::placeholder{color:var(--chat-color-placeholder)}.aqua-shell__send,.aqua-shell__stop{min-width:44px;height:44px;border:0;border-radius:var(--chat-radius-send);cursor:pointer;transition:background-color var(--dur-fast) var(--ease-out),transform .1s var(--ease-out)}.aqua-shell__send{display:grid;place-items:center;width:44px;background:var(--chat-color-ink);color:var(--chat-color-on-ink)}.aqua-shell__send:disabled{cursor:not-allowed;opacity:.28}.aqua-shell__stop{display:flex;align-items:center;justify-content:center;gap:5px;padding:0 11px;background:var(--chat-color-stop-soft);color:var(--chat-color-stop);font-size:11px;font-weight:700;white-space:nowrap}.aqua-shell__footer>p{margin:8px 0 0;color:var(--chat-color-placeholder);font-size:9px;text-align:center}.aqua-shell button:focus-visible,.aqua-shell textarea:focus-visible,.aqua-shell summary:focus-visible{outline:3px solid var(--chat-color-focus);outline-offset:2px}.aqua-shell__composer textarea:focus-visible{outline:0}.aqua-shell button:active{transform:translateY(1px)}@media(hover:hover)and (pointer:fine){.aqua-shell__icon-button:hover,.aqua-shell__suggestions button:hover{background:var(--chat-color-accent-soft)}.aqua-shell__suggestions button:hover{transform:translateY(-1px)}.aqua-shell__send:hover{background:var(--chat-color-ink-hover)}.aqua-shell__stop:hover{background:var(--chat-color-stop-soft-hover)}.aqua-shell__sources summary:hover{color:var(--chat-color-ink)}}@keyframes aqua-shell-dot{0%,70%,to{opacity:.32;transform:translateY(0)}35%{opacity:1;transform:translateY(-2px)}}@keyframes aqua-shell-caret{50%{opacity:0}}@media(max-width:359px){.aqua-shell{height:min(620px,calc(100dvh - 24px));border-radius:20px}.aqua-shell__header{gap:4px;padding:12px}.aqua-shell__brand{gap:6px}.aqua-shell__state{padding-inline:6px}.aqua-shell__messages,.aqua-shell__footer{padding-inline:12px}.aqua-shell__suggestions button{font-size:11px}.aqua-shell__message--user>div{max-width:82%}.aqua-shell__assistant-body{max-width:calc(100% - 40px)}}@media(prefers-reduced-motion:reduce){.aqua-shell *,.aqua-shell *:before,.aqua-shell *:after{animation-duration:.15s!important;animation-iteration-count:1!important;transition-duration:.15s!important}.aqua-shell__messages{scroll-behavior:auto}}.aqua-shell{border-color:#dce7f0;background:#fff;box-shadow:0 22px 58px #23496f24,0 4px 14px #5aa0d60f}.aqua-shell__header{min-height:92px;gap:14px;padding:18px 20px;border-bottom-color:#e5edf4}.aqua-shell__brand{gap:12px}.aqua-shell__brand>span{gap:4px}.aqua-shell__brand strong{font-size:20px;line-height:1.08}.aqua-shell__brand small{font-size:13px;line-height:1.25;color:#6f88a3}.aqua-shell__avatar{flex-basis:46px;width:46px;height:46px;background:#eaf5ff}.aqua-shell__avatar img{width:36px;height:39px}.aqua-shell__state{gap:6px;padding:7px 11px;border-radius:999px;background:#f3f8f6;color:#668277;font-size:11px;font-weight:650}.aqua-shell__state i{width:7px;height:7px;flex-basis:7px}.aqua-shell__state.is-ready{background:#edf8f1;color:#13814d}.aqua-shell__icon-button{flex-basis:40px;width:40px;height:40px;color:#70869d}.aqua-shell__icon-button:hover{background:#f3f7fa}.aqua-shell__messages{padding:22px 20px 24px;scrollbar-width:auto;scrollbar-color:#b8cbd9 transparent}.aqua-shell__messages::-webkit-scrollbar{width:5px}.aqua-shell__messages::-webkit-scrollbar-track{background:transparent}.aqua-shell__messages::-webkit-scrollbar-thumb{border-radius:999px;background:#b8cbd9}.aqua-shell__messages::-webkit-scrollbar-thumb:hover{background:#8faec4}.aqua-shell__welcome{padding:2px 4px}.aqua-shell__welcome>.aqua-shell__avatar{width:52px;height:52px}.aqua-shell__welcome>.aqua-shell__avatar img{width:40px;height:44px}.aqua-shell__welcome h2{margin-top:16px;font-size:24px}.aqua-shell__welcome>p{font-size:14px;color:#7088a1}.aqua-shell__message{margin-bottom:24px}.aqua-shell__message--assistant{gap:12px}.aqua-shell__message--assistant>.aqua-shell__avatar{flex-basis:36px;width:36px;height:36px}.aqua-shell__message--assistant>.aqua-shell__avatar img{width:28px;height:31px}.aqua-shell__assistant-body{max-width:calc(100% - 48px);padding-top:1px}.aqua-shell__assistant-name{margin-bottom:8px;color:#20334e;font-size:14px;font-weight:650}.aqua-shell__answer-copy{gap:12px;font-size:15px;line-height:1.58}.aqua-shell__message--user>div{max-width:74%;padding:9px 13px;border-radius:15px 15px 4px;background:#eaf4ff;color:#223b59;font-size:14px;line-height:1.45}.aqua-shell__thinking{padding:11px 13px;border-color:#e3edf4;background:#f8fbfd}.aqua-shell__thinking strong{font-size:13px;font-weight:600}.aqua-shell__thinking p{font-size:11px;color:#7890a7}.aqua-shell__sources{margin-top:16px;padding-top:12px;border-top-color:#dfe9f1}.aqua-shell__sources summary{gap:7px;min-height:30px;color:#7189a1;font-size:12px;font-weight:600}.aqua-shell__sources summary svg{color:#7791aa}.aqua-shell__sources summary:after{content:"";width:9px;height:9px;margin:0 3px 4px auto;border-right:2px solid currentColor;border-bottom:2px solid currentColor;transform:rotate(45deg);transition:transform var(--dur-fast) var(--ease-out)}.aqua-shell__sources[open] summary:after{content:"";margin-bottom:-4px;transform:rotate(225deg)}.aqua-shell__sources ul{margin-top:8px;padding:10px 12px 10px 25px;background:#f6faff;color:#7189a1}.aqua-shell__footer{padding:0 20px 16px}.aqua-shell__composer{min-height:74px;padding:10px 9px 9px 14px;border-color:#dce7f0;border-radius:20px;background:#fff;box-shadow:0 5px 18px #33618b0d;outline:0}.aqua-shell__composer:focus-within{border-color:#8dc8f4;box-shadow:0 0 0 3px #6bbef721}.aqua-shell__composer label{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.aqua-shell__composer textarea{min-height:38px;font-size:15px;line-height:1.4}.aqua-shell__composer textarea::placeholder{color:#8aa2ba}.aqua-shell__send,.aqua-shell__stop{min-width:42px;height:42px}.aqua-shell__send{width:42px;border-radius:14px;background:#9bcaf3}.aqua-shell__send:disabled{background:#b9d8ef;opacity:.72}.aqua-shell__send:not(:disabled){background:#69b5f1}.aqua-shell__send:not(:disabled):hover{background:#4aa5e9}.aqua-shell__footer>p{margin-top:11px;color:#8aa0b5;font-size:10px;white-space:nowrap}@media(max-width:359px){.aqua-shell__header{padding:14px 12px}.aqua-shell__brand strong{font-size:18px}.aqua-shell__brand small{font-size:11px}.aqua-shell__avatar{flex-basis:42px;width:42px;height:42px}.aqua-shell__messages,.aqua-shell__footer{padding-inline:12px}}.aqua-chat{--chat-width: min(420px, calc(100vw - 32px) );--chat-height: min(620px, calc(100vh - 100px) );position:fixed;z-index:1000;right:26px;bottom:26px;width:56px;height:56px;pointer-events:none;transform-origin:bottom right}.aqua-chat__panel{position:absolute;inset:auto 0 0 auto;display:flex;flex-direction:column;width:56px;height:56px;overflow:hidden;border:1px solid transparent;border-radius:50%;background:#fff;box-shadow:0 12px 28px #18539a1f;opacity:0;transform:scale(.94);transform-origin:bottom right;transition:width .29s cubic-bezier(.22,1,.36,1),height .29s cubic-bezier(.22,1,.36,1),border-radius .29s cubic-bezier(.22,1,.36,1),border-color .22s ease,box-shadow .29s cubic-bezier(.22,1,.36,1),opacity .14s ease,transform .29s cubic-bezier(.22,1,.36,1)}.aqua-chat--open{width:var(--chat-width);height:var(--chat-height);pointer-events:auto}.aqua-chat--open .aqua-chat__panel{width:var(--chat-width);height:var(--chat-height);border-color:#dcebf7;border-radius:26px;box-shadow:0 22px 60px #0b1d3a29,0 5px 16px #5db7ff14;opacity:1;transform:scale(1)}.aqua-chat__content{position:absolute;inset:0;min-width:0;overflow:hidden;border-radius:inherit;opacity:0;visibility:hidden;transform:translateY(8px);transition:opacity .18s ease .11s,transform .26s cubic-bezier(.22,1,.36,1) .11s}.aqua-chat--content-ready .aqua-chat__content{opacity:1;visibility:visible;transform:translateY(0)}.aqua-chat__content>.aqua-shell{width:100%;max-width:none;height:100%;border:0;border-radius:inherit;box-shadow:none}.aqua-chat__launcher{position:absolute;z-index:2;right:5px;bottom:5px;display:grid;place-items:center;width:46px;height:46px;padding:0;border:1px solid #d7ebfa;border-radius:50%;background:#fafdff;box-shadow:0 8px 22px #18539a24;pointer-events:auto;cursor:pointer;transform-origin:center;transition:right .29s cubic-bezier(.22,1,.36,1),bottom .29s cubic-bezier(.22,1,.36,1),width .29s cubic-bezier(.22,1,.36,1),height .29s cubic-bezier(.22,1,.36,1),border-color .18s ease,box-shadow .18s ease,opacity .12s ease,transform .19s cubic-bezier(.22,1,.36,1)}.aqua-chat__launcher img{display:block;width:36px;height:39px;object-fit:contain;transition:width .29s cubic-bezier(.22,1,.36,1),height .29s cubic-bezier(.22,1,.36,1)}.aqua-chat__launcher:hover{border-color:#b9ddf6;box-shadow:0 11px 25px #18539a33;transform:translateY(-2px) scale(1.04)}.aqua-chat__launcher:active{transform:translateY(0) scale(.94);transition-duration:55ms}.aqua-chat--open .aqua-chat__launcher{inset:18px auto auto 18px;width:42px;height:42px;border-color:transparent;background:transparent;box-shadow:none;transform:none;transition-delay:45ms}.aqua-chat--open .aqua-chat__launcher{opacity:0;visibility:hidden;pointer-events:none}.aqua-chat--content-ready .aqua-chat__launcher{opacity:1;visibility:visible;pointer-events:auto}.aqua-chat--open.aqua-chat--content-ready .aqua-chat__launcher{opacity:0;visibility:hidden;pointer-events:none}.aqua-chat--open:not(.aqua-chat--content-ready) .aqua-chat__header,.aqua-chat--open:not(.aqua-chat--content-ready) .aqua-chat__conversation,.aqua-chat--open:not(.aqua-chat--content-ready) .aqua-chat__composer,.aqua-chat--open:not(.aqua-chat--content-ready) .aqua-chat__note{pointer-events:none}.aqua-chat--open .aqua-chat__launcher img{width:32px;height:35px}.aqua-chat--open .aqua-chat__launcher:hover{transform:translateY(-1px) scale(1.03)}.aqua-chat__header{flex:0 0 auto;display:flex;align-items:flex-start;justify-content:space-between;min-height:86px;padding:18px 18px 14px 70px;border-bottom:1px solid #edf3f8;opacity:0;visibility:hidden;transform:translateY(8px);transition:opacity .18s ease .11s,transform .26s cubic-bezier(.22,1,.36,1) .11s}.aqua-chat--content-ready .aqua-chat__header,.aqua-chat--content-ready .aqua-chat__conversation,.aqua-chat--content-ready .aqua-chat__composer,.aqua-chat--content-ready .aqua-chat__note{opacity:1;visibility:visible;transform:translateY(0)}.aqua-chat__identity-copy{display:grid;gap:1px}.aqua-chat__identity-copy strong{color:var(--color-navy);font:700 17px/1.2 var(--font-display);letter-spacing:-.02em}.aqua-chat__identity-copy span{color:var(--color-ink-muted);font-size:11px}.aqua-chat__close{display:grid;place-items:center;flex:0 0 38px;width:38px;height:38px;margin-top:-4px;border:1px solid transparent;border-radius:50%;background:transparent;color:#657386;transition:background .16s ease,color .16s ease,transform .16s ease}.aqua-chat__close:hover{background:#f0f7fc;color:var(--color-navy);transform:rotate(3deg)}.aqua-chat__conversation{flex:1 1 auto;min-height:0;overflow-y:auto;overscroll-behavior:contain;padding:20px 24px 24px;opacity:0;visibility:hidden;transform:translateY(8px);scrollbar-width:thin;scrollbar-color:#c8dce9 transparent;transition:opacity .21s ease 145ms,transform .26s cubic-bezier(.22,1,.36,1) 145ms}.aqua-chat__welcome{width:100%;padding:22px;border:1px solid #e5f0f8;border-radius:20px;background:linear-gradient(145deg,#fbfdff,#f2faff)}.aqua-chat__eyebrow{color:#348dca;font-size:10px;font-weight:700;letter-spacing:.12em}.aqua-chat__welcome h2{margin:10px 0 3px;color:var(--color-navy);font:700 25px/1.1 var(--font-display);letter-spacing:-.035em}.aqua-chat__welcome p{margin:0;color:var(--color-ink-muted);font-size:14px}.aqua-chat__hint{display:block;margin-top:17px;padding-top:15px;border-top:1px solid #e1edf5;color:#6f8aa3;font-size:11px;line-height:1.5}.aqua-chat__composer{position:relative;flex:0 0 auto;display:flex;align-items:center;min-height:68px;margin:0 16px;padding:8px 8px 8px 16px;border:1px solid #dcebf7;border-radius:20px;background:#fff;box-shadow:0 8px 22px #0b1d3a0f;opacity:0;visibility:hidden;transform:translateY(8px);transition:opacity .21s ease 175ms,transform .26s cubic-bezier(.22,1,.36,1) 175ms}.aqua-chat__composer input{min-width:0;flex:1;height:44px;border:0;outline:0;background:transparent;color:var(--color-navy);font:14px var(--font-body)}.aqua-chat__composer input::placeholder{color:#8b9bad}.aqua-chat__send{display:grid;place-items:center;flex:0 0 44px;width:44px;height:44px;border:0;border-radius:50%;background:var(--color-navy);color:#fff;transition:transform .16s ease,background .16s ease}.aqua-chat__send:hover{background:#163660;transform:translateY(-1px)}.aqua-chat__send:active{transform:scale(.95)}.aqua-chat__note{flex:0 0 auto;margin:11px 20px 16px;color:#8b9bad;font-size:10px;text-align:center;opacity:0;visibility:hidden;transform:translateY(8px);transition:opacity .21s ease 195ms,transform .26s cubic-bezier(.22,1,.36,1) 195ms}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}@media(max-width:640px){.aqua-chat{right:14px;bottom:14px;--chat-width: calc(100vw - 28px) ;--chat-height: min(620px, calc(100vh - 76px) )}.aqua-chat__panel,.aqua-chat--open .aqua-chat__panel{border-radius:24px}}@media(prefers-reduced-motion:reduce){.aqua-chat__panel,.aqua-chat__content,.aqua-chat__launcher,.aqua-chat__launcher img,.aqua-chat__header,.aqua-chat__conversation,.aqua-chat__composer,.aqua-chat__note{transition-duration:1ms!important;transition-delay:0ms!important}}.chat-preview-lab{min-height:150vh;color:#0b1d3a;background:radial-gradient(circle at 68% 19%,rgba(174,225,255,.34),transparent 25%),#f7fbfe;font-family:var(--font-body)}.chat-preview-lab__header{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;min-height:74px;padding:0 32px;border-bottom:1px solid #e2eef7;background:#ffffffc7}.chat-preview-lab__back{display:inline-flex;align-items:center;gap:7px;width:max-content;color:#5c7591;font-size:12px;font-weight:600;text-decoration:none}.chat-preview-lab__back:hover{color:#187fc8}.chat-preview-lab__title{text-align:center}.chat-preview-lab__title h1{margin:2px 0 0;font:700 20px/1 var(--font-display);letter-spacing:-.03em}.chat-preview-lab__kicker{color:#318fd2;font-size:10px;font-weight:700;letter-spacing:.13em}.chat-preview-lab__status{justify-self:end;padding:7px 10px;border:1px solid #dcebf7;border-radius:999px;color:#5c7591;font-size:10px;font-weight:600;background:#fff}.chat-preview-lab__status i{display:inline-block;width:6px;height:6px;margin-right:6px;border-radius:50%;background:#46c98d}.chat-preview-lab__hero{display:grid;grid-template-columns:minmax(320px,.8fr) minmax(480px,1.2fr);gap:clamp(30px,7vw,110px);align-items:center;width:min(1200px,calc(100% - 64px));min-height:680px;margin:0 auto;padding:72px 0}.chat-preview-lab__intro{max-width:410px}.chat-preview-lab__intro h2{margin:12px 0 18px;font:700 clamp(40px,5vw,66px)/.98 var(--font-display);letter-spacing:-.06em}.chat-preview-lab__intro h2 em{color:#3c96d8;font-style:normal}.chat-preview-lab__intro p{max-width:350px;margin:0;color:#6b819a;font-size:15px;line-height:1.7}.chat-preview-lab__checks{display:grid;gap:11px;margin-top:36px}.chat-preview-lab__check{display:grid;grid-template-columns:28px 1fr auto;align-items:center;gap:8px;max-width:330px;padding:10px 12px;border:1px solid #e0edf6;border-radius:14px;background:#ffffffb8}.chat-preview-lab__check>svg:first-child{color:#3d98d7}.chat-preview-lab__check div{display:grid;gap:1px}.chat-preview-lab__check strong{font:600 12px var(--font-display)}.chat-preview-lab__check span{color:#8295a9;font-size:10px}.chat-preview-lab__checkmark{color:#46c98d}.chat-preview-lab__canvas{position:relative;min-height:480px;overflow:hidden;border:1px solid #dcebf7;border-radius:32px;background:linear-gradient(150deg,#fafdff,#eaf7ff);box-shadow:0 24px 58px #226f9a14}.chat-preview-lab__canvas:after{content:"";position:absolute;inset:0;background:linear-gradient(115deg,rgba(255,255,255,.78),transparent 50%);pointer-events:none}.chat-preview-lab__canvas-label{position:absolute;top:25px;left:28px;color:#6f9abc;font-size:10px;font-weight:700;letter-spacing:.13em}.chat-preview-lab__rings{position:absolute;right:-100px;top:52px;width:450px;height:450px;border:1px solid rgba(93,183,255,.28);border-radius:50%;box-shadow:0 0 0 32px #ffffff3b,0 0 0 64px #5db7ff14}.chat-preview-lab__lesson-card{position:absolute;z-index:1;left:12%;bottom:13%;width:min(330px,65%);padding:25px;border:1px solid rgba(255,255,255,.8);border-radius:22px;background:#ffffffd1;box-shadow:0 17px 35px #226f9a1a;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.chat-preview-lab__lesson-card>span{color:#328ed0;font-size:10px;font-weight:700;letter-spacing:.12em}.chat-preview-lab__lesson-card h3{margin:10px 0;font:700 28px/1.05 var(--font-display);letter-spacing:-.04em}.chat-preview-lab__lesson-card p{margin:0;color:#69829e;font-size:12px;line-height:1.6}.chat-preview-lab__rule{height:1px;margin:21px 0 12px;background:#e1edf5}.chat-preview-lab__lesson-card small{color:#88a0b5;font-size:10px}.chat-preview-lab__spark{position:absolute;width:8px;height:8px;border-radius:50%;background:#5db7ff;box-shadow:0 0 0 7px #5db7ff1f}.chat-preview-lab__spark--one{right:22%;top:28%}.chat-preview-lab__spark--two{right:34%;bottom:20%;width:5px;height:5px;background:#ff9abb;box-shadow:0 0 0 6px #ff9abb1f}.chat-preview-lab__below{width:min(1200px,calc(100% - 64px));margin:0 auto;padding:70px 0 180px;border-top:1px solid #e2eef7}.chat-preview-lab__below>span{color:#318fd2;font-size:10px;font-weight:700;letter-spacing:.13em}.chat-preview-lab__below h2{margin:10px 0 8px;font:700 32px var(--font-display);letter-spacing:-.04em}.chat-preview-lab__below>p{margin:0;color:#6b819a}.chat-preview-lab__columns{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:34px}.chat-preview-lab__columns div{display:grid;gap:8px;padding-top:17px;border-top:2px solid #bfe2f8}.chat-preview-lab__columns strong{color:#318fd2;font:700 13px var(--font-display)}.chat-preview-lab__columns span{max-width:180px;color:#6b819a;font-size:12px;line-height:1.5}.chat-preview-lab__context{display:flex;justify-content:space-between;align-items:end;gap:32px;width:min(1200px,calc(100% - 64px));margin:0 auto;padding:38px 0 70px;border-top:1px solid #e2eef7}.chat-preview-lab__context h2{margin:10px 0 7px;font:700 30px var(--font-display);letter-spacing:-.04em}.chat-preview-lab__context p{max-width:470px;margin:0;color:#6b819a;font-size:13px}.chat-preview-lab__context-controls{display:flex;gap:10px}.chat-preview-lab__context-controls label{display:grid;gap:7px;color:#6b819a;font-size:10px;font-weight:700}.chat-preview-lab__context-controls select{min-width:145px;height:40px;padding:0 11px;border:1px solid #dcebf7;border-radius:11px;color:#0b1d3a;background:#fff;font-size:12px}@media(max-width:800px){.chat-preview-lab__header{padding:0 16px}.chat-preview-lab__status{display:none}.chat-preview-lab__hero{grid-template-columns:1fr;width:calc(100% - 32px);padding:54px 0 36px}.chat-preview-lab__intro{max-width:560px}.chat-preview-lab__canvas{min-height:420px}.chat-preview-lab__context,.chat-preview-lab__below{width:calc(100% - 32px);padding-top:44px}.chat-preview-lab__context{display:grid;align-items:start}.chat-preview-lab__context-controls{flex-wrap:wrap}.chat-preview-lab__columns{grid-template-columns:1fr;gap:24px}.chat-preview-lab__columns span{max-width:none}}:root{--focus-ink:#173657;--focus-muted:#7894b2;--focus-blue:#5ab4f6;--focus-blue-deep:#48a8f3;--focus-wash:#edf6fc;--focus-line:#d9e8f3}.aqua-focus-trigger{position:relative;display:inline-flex;align-items:center;justify-content:center;width:40px;min-width:40px;height:40px;padding:0;border:1px solid transparent;border-radius:999px;background:transparent;color:var(--focus-ink);transition:background var(--dur-fast) var(--ease-out),border-color var(--dur-fast),transform var(--dur-fast) var(--ease-out)}.aqua-focus-trigger:hover{border-color:#dcecf8;background:var(--focus-wash);transform:scale(1.04)}.aqua-focus-trigger:active{transform:scale(.94)}.aqua-focus-trigger img{display:block;width:24px;height:27px;object-fit:contain}.aqua-focus-trigger.is-running:after{content:"";position:absolute;top:4px;right:4px;width:6px;height:6px;border:2px solid #fff;border-radius:50%;background:var(--focus-blue-deep);animation:mini-focus-running 2.4s ease-in-out infinite}.aqua-focus-trigger__time{position:absolute;right:calc(100% + 5px);top:50%;padding:5px 7px;border:1px solid var(--focus-line);border-radius:999px;background:#fffffff5;box-shadow:0 3px 10px #1f4b710f;font:700 11px/1 var(--font-display);font-variant-numeric:tabular-nums;letter-spacing:-.02em;transform:translateY(-50%);white-space:nowrap}.aqua-focus-layer{position:fixed;z-index:85;inset:0;pointer-events:none;opacity:0;transition:opacity .19s ease-out}.aqua-focus-layer.is-visible{opacity:1}.mini-focus-panel{position:fixed;top:var(--focus-anchor-top,78px);right:var(--focus-anchor-right,20px);width:352px;max-height:calc(100dvh - var(--focus-anchor-top,78px) - 12px);overflow:visible auto;pointer-events:auto;border:1px solid rgba(214,231,243,.95);border-radius:20px;background:#fffffdfb;box-shadow:0 18px 48px #1f4b7124,0 2px 8px #1f4b710a;color:var(--focus-ink);transform:translateY(-8px) scale(.97);transform-origin:top right;transition:transform 205ms cubic-bezier(.2,.8,.2,1);font-family:var(--font-body)}.aqua-focus-layer.is-visible .mini-focus-panel{transform:translateY(0) scale(1)}.mini-focus-panel:before{content:"";position:absolute;top:-7px;right:17px;width:13px;height:13px;border-top:1px solid var(--focus-line);border-left:1px solid var(--focus-line);background:#fffffd;transform:rotate(45deg)}.mini-focus-panel__header{position:relative;z-index:1;display:flex;align-items:center;justify-content:space-between;min-height:58px;padding:10px 14px 8px 18px}.mini-focus-panel__header>div{display:flex;align-items:center;gap:8px}.mini-focus-panel__header img{width:24px;height:27px;object-fit:contain}.mini-focus-panel__header strong{font:800 17px/1 var(--font-display);letter-spacing:-.035em}.mini-focus-panel__header strong span{font-weight:700}.mini-focus-panel__header button{display:grid;place-items:center;width:38px;height:38px;border:0;border-radius:50%;background:transparent;color:var(--focus-muted);transition:background var(--dur-fast),color var(--dur-fast),transform var(--dur-fast)}.mini-focus-panel__header button:hover{background:var(--focus-wash);color:var(--focus-ink)}.mini-focus-panel__header button:active{transform:scale(.94)}.mini-focus-panel__main{display:flex;flex-direction:column;align-items:center;padding:0 22px 18px}.mini-focus-mascot{position:relative;width:118px;height:118px;margin-top:-2px;transform-origin:center bottom}.mini-focus-mascot>img,.mini-focus-mascot__water-clip{position:absolute;inset:0;display:block;width:100%;height:100%;object-fit:contain}.mini-focus-mascot__body{z-index:1}.mini-focus-mascot__water-clip{z-index:2;overflow:hidden;-webkit-mask:url(/assets/aqua-focus/mascot/aqua-water-mask.png) center/contain no-repeat;mask:url(/assets/aqua-focus/mascot/aqua-water-mask.png) center/contain no-repeat}.mini-focus-mascot__water{position:absolute;inset:0;background:linear-gradient(to bottom,transparent 0 4%,#c1dffd 4% 100%);transition:transform .35s linear}.mini-focus-mascot__water svg{position:absolute;top:0;left:0;width:200%;height:8%;animation:mini-focus-wave 7.5s linear infinite}.mini-focus-mascot__water path{fill:#c1dffd}.mini-focus-mascot__outline{z-index:3}.mini-focus-mascot__highlight{z-index:4}.mini-focus-mascot__face{z-index:5;transform:translate(-1%,-13.5%)}.mini-focus-mascot.is-running{animation:mini-focus-breathe 3.8s ease-in-out infinite}.mini-focus-mascot.is-completed{animation:mini-focus-collected .92s cubic-bezier(.22,.72,.18,1)}.mini-focus-timer{margin-top:-2px;color:var(--focus-ink);font:900 43px/.95 var(--font-display);font-variant-numeric:tabular-nums;letter-spacing:-.055em}.mini-focus-status{min-height:18px;margin-top:7px;color:var(--focus-muted);font-size:11px}.mini-focus-mode{position:relative;width:224px;margin-top:10px}.mini-focus-mode__button{display:grid;grid-template-columns:1fr auto 16px;align-items:center;width:100%;min-height:42px;padding:0 13px 0 16px;border:1px solid transparent;border-radius:999px;background:#e8f3fb;color:var(--focus-ink);text-align:left;transition:background var(--dur-fast),border-color var(--dur-fast),transform var(--dur-fast)}.mini-focus-mode__button:hover{border-color:#cfe4f3;background:#deeffa}.mini-focus-mode__button:active{transform:scale(.98)}.mini-focus-mode__button span{font-size:12px;font-weight:650}.mini-focus-mode__button b{color:#4c80ad;font-size:11px}.mini-focus-mode__button svg{color:#7196bc}.mini-focus-mode__menu{position:absolute;z-index:2;top:calc(100% + 7px);left:0;width:100%;padding:6px;border:1px solid var(--focus-line);border-radius:14px;background:#fff;box-shadow:0 12px 30px #1f4b7121;animation:mini-focus-menu-in .16s ease-out}.mini-focus-mode__menu button{display:flex;align-items:center;justify-content:space-between;width:100%;min-height:38px;padding:0 10px;border:0;border-radius:9px;background:transparent;color:var(--focus-ink);font-size:12px;text-align:left}.mini-focus-mode__menu button:hover,.mini-focus-mode__menu button[aria-selected=true]{background:var(--focus-wash)}.mini-focus-confirm{position:absolute;z-index:3;top:-18px;left:-18px;width:260px;padding:14px;border:1px solid var(--focus-line);border-radius:15px;background:#fffefa;box-shadow:0 16px 38px #1f4b712b}.mini-focus-confirm strong{display:block;font:750 13px/1.3 var(--font-display)}.mini-focus-confirm p{margin:4px 0 12px;color:var(--focus-muted);font-size:11px}.mini-focus-confirm div{display:flex;justify-content:flex-end;gap:7px}.mini-focus-confirm button{min-height:34px;padding:0 10px;border:0;border-radius:10px;background:var(--focus-wash);color:var(--focus-muted);font-size:10px;font-weight:700}.mini-focus-confirm button.is-primary{background:var(--focus-blue);color:#fff}.mini-focus-controls{display:flex;align-items:center;gap:14px;margin-top:14px}.mini-focus-control{display:grid;place-items:center;border:0;border-radius:50%;transition:transform var(--dur-fast) var(--ease-out),background var(--dur-fast),color var(--dur-fast),opacity var(--dur-fast)}.mini-focus-control:hover:not(:disabled){transform:scale(1.04)}.mini-focus-control:active:not(:disabled){transform:scale(.94)}.mini-focus-control--primary{width:58px;height:58px;background:var(--focus-blue);color:#fff}.mini-focus-control--primary:hover{background:var(--focus-blue-deep)}.mini-focus-control--primary span{display:grid;place-items:center;animation:mini-focus-control-swap .16s ease-out}.mini-focus-control--reset,.mini-focus-control--sound{width:44px;height:44px;background:#edf5fa;color:#7899ba}.mini-focus-control--sound.is-active{background:#dff1fc;color:#287bb9}.mini-focus-control:disabled{opacity:.36}.mini-focus-drops{width:100%;margin-top:15px;text-align:center}.mini-focus-drops p{margin:0 0 7px;color:var(--focus-muted);font-size:11px}.mini-focus-drops__row{display:flex;align-items:center;justify-content:center;gap:5px;min-height:28px;flex-wrap:wrap}.mini-focus-drops__row img{display:block;width:26px;height:26px;object-fit:contain}.mini-focus-drops__row img.is-new{animation:mini-focus-drop-land .3s cubic-bezier(.2,.8,.2,1)}.mini-focus-drops strong{display:block;margin-top:4px;color:var(--focus-muted);font-size:10px;font-weight:600}.mini-focus-panel__link{display:flex;align-items:center;justify-content:center;gap:8px;min-height:50px;margin:0 14px 14px;border-top:1px solid var(--focus-line);border-radius:13px;background:#edf6fd;color:#1878c2;font-size:12px;font-weight:750;text-decoration:none;transition:background var(--dur-fast),transform var(--dur-fast)}.mini-focus-panel__link:hover{background:#e2f1fc}.mini-focus-panel__link:hover svg{transform:translate(3px)}.mini-focus-panel__link:active{transform:scale(.985)}.mini-focus-panel__link svg{transition:transform var(--dur-fast) var(--ease-out)}.mini-focus-panel :is(button,a):focus-visible,.aqua-focus-trigger:focus-visible{outline:3px solid var(--color-home-focus);outline-offset:2px}@keyframes mini-focus-running{0%,to{opacity:.6;transform:scale(.85)}50%{opacity:1;transform:scale(1.12)}}@keyframes mini-focus-wave{0%{transform:translate(0)}to{transform:translate(-50%)}}@keyframes mini-focus-breathe{0%,to{transform:scale(1)}50%{transform:scale(1.018)}}@keyframes mini-focus-collected{0%,to{transform:scale(1)}35%{transform:scale(1.045)}70%{transform:scale(.985)}}@keyframes mini-focus-drop-land{0%{transform:scale(.8)}62%{transform:scale(1.08)}to{transform:scale(1)}}@keyframes mini-focus-control-swap{0%{opacity:.2;transform:scale(.86)}to{opacity:1;transform:scale(1)}}@keyframes mini-focus-menu-in{0%{opacity:0;transform:translateY(-4px) scale(.98)}}@media(max-width:720px){.aqua-focus-trigger__time{display:none}.aqua-focus-trigger{width:40px;padding:0}}@media(max-width:600px){.aqua-focus-layer{background:#10264a2e}.mini-focus-panel{inset:auto 0 0;width:100%;max-height:min(88dvh,650px);border-radius:22px 22px 0 0;padding-bottom:env(safe-area-inset-bottom);transform:translateY(18px) scale(.985);transform-origin:bottom center}.mini-focus-panel:before{display:none}.aqua-focus-layer.is-visible .mini-focus-panel{transform:translateY(0) scale(1)}.mini-focus-panel__main{padding-inline:18px}}@media(prefers-reduced-motion:reduce){.aqua-focus-layer,.mini-focus-panel,.aqua-focus-trigger,.mini-focus-control,.mini-focus-panel__link,.mini-focus-mascot__water{transition-duration:.01ms!important}.aqua-focus-trigger.is-running:after,.mini-focus-mascot,.mini-focus-mascot__water svg,.mini-focus-drops__row img,.mini-focus-control--primary span{animation:none!important}}.aqua-focus-trigger-wrap{display:inline-flex;align-items:center;gap:5px;min-width:max-content}.aqua-focus-trigger__time{position:static;display:inline-flex;align-items:center;min-height:25px;padding:0 7px;transform:none;white-space:nowrap}@media(max-width:720px){.aqua-focus-trigger__time{display:inline-flex;min-height:23px;padding-inline:5px;font-size:10px}}.aqua-todo-trigger-wrap{position:relative;display:inline-flex;align-items:center;min-width:max-content}.aqua-todo-trigger{display:inline-flex;align-items:center;justify-content:center;gap:7px;min-width:86px;min-height:40px;padding:0 13px;border:1px solid #d8eaf7;border-radius:999px;background:#fff;color:#176fbe;font:750 12px/1 var(--font-body);cursor:pointer;transition:background-color .16s var(--ease-out),border-color .16s var(--ease-out),transform .16s var(--ease-out)}.aqua-todo-trigger:hover,.aqua-todo-trigger.is-open{border-color:#bcdff7;background:#edf7ff}.aqua-todo-trigger:active{transform:scale(.97)}.aqua-todo-trigger:focus-visible,.aqua-todo-popover :is(button,input,a):focus-visible{outline:3px solid var(--color-home-focus);outline-offset:2px}.aqua-todo-popover{position:absolute;z-index:90;top:calc(100% + 10px);right:0;width:min(420px,calc(100vw - 24px));overflow:hidden;border:1px solid #cfe3f2;border-radius:20px;background:#fff;box-shadow:0 18px 48px #1f4b7129,0 3px 9px #1f4b710d;color:#173657;opacity:0;transform:translateY(-4px) scale(.98);transform-origin:top right;transition:opacity .18s ease-out,transform .18s cubic-bezier(.2,.8,.2,1);pointer-events:none}.aqua-todo-popover.is-visible{opacity:1;transform:translateY(0) scale(1);pointer-events:auto}.aqua-todo-popover:before{content:"";position:absolute;top:-7px;right:27px;width:13px;height:13px;border-top:1px solid #cfe3f2;border-left:1px solid #cfe3f2;background:#fff;transform:rotate(45deg)}.aqua-todo-popover__header{position:relative;display:flex;align-items:flex-start;justify-content:space-between;padding:18px 16px 14px;border-bottom:1px solid #e6eff6}.aqua-todo-popover__header>div{display:flex;align-items:center;gap:11px}.aqua-todo-popover__icon{display:grid;place-items:center;width:42px;height:42px;border-radius:13px;background:#eaf5ff;color:#1687dc}.aqua-todo-popover__header strong{display:block;font:800 17px/1.1 var(--font-display);letter-spacing:-.03em}.aqua-todo-popover__header p{margin:4px 0 0;color:#69829b;font-size:11px}.aqua-todo-popover__header>button{display:grid;place-items:center;width:38px;height:38px;border:0;border-radius:50%;background:transparent;color:#587997;cursor:pointer;transition:background .16s,color .16s}.aqua-todo-popover__header>button:hover{background:#edf7ff;color:#173657}.aqua-todo-popover__body{padding:17px 16px 16px}.aqua-todo-empty{display:grid;justify-items:center;gap:7px;padding:15px 10px 19px;color:#1687d6;text-align:center}.aqua-todo-empty strong{color:#173657;font:750 14px/1.2 var(--font-display)}.aqua-todo-empty p{margin:0;color:#69829b;font-size:11px}.aqua-todo-add-button{display:flex;align-items:center;justify-content:center;gap:7px;width:100%;min-height:46px;padding:0 13px;border:1px solid #d6e8f5;border-radius:11px;background:#fff;color:#4c7fa6;font:700 12px/1 var(--font-body);text-align:left;transition:background .16s,border-color .16s}.aqua-todo-add-button:hover{border-color:#9dd1f4;background:#f2f9ff}.aqua-todo-quick-add{display:grid;gap:7px}.aqua-todo-quick-add label{color:#416781;font-size:10px;font-weight:800}.aqua-todo-quick-add>div{display:flex;gap:7px}.aqua-todo-quick-add input{min-width:0;flex:1;height:44px;padding:0 12px;border:1px solid #cfe2ef;border-radius:10px;color:#173657;font:500 12px var(--font-body)}.aqua-todo-quick-add input::placeholder{color:#9ab0c0}.aqua-todo-quick-add button{min-width:58px;height:44px;border:0;border-radius:10px;background:#258cda;color:#fff;font:750 12px var(--font-body)}.aqua-todo-quick-add small{color:#b36b4e;font-size:10px}.aqua-todo-popover__cta{display:flex;align-items:center;justify-content:center;gap:7px;min-height:50px;margin:0 14px 14px;border-radius:13px;background:#e8f4ff;color:#0878d0;font-size:12px;font-weight:800;text-decoration:none;transition:background .16s,transform .16s}.aqua-todo-popover__cta:hover{background:#dceeff}.aqua-todo-popover__cta:active{transform:scale(.985)}@media(max-width:980px){.aqua-todo-trigger{min-width:78px;padding-inline:10px}.physics-app-header__right{gap:8px}.aqua-todo-popover{right:-8px}}@media(max-width:720px){.aqua-todo-trigger{min-width:42px;width:42px;padding:0}.aqua-todo-trigger span{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}.aqua-todo-popover{right:-8px;width:min(390px,calc(100vw - 16px))}}@media(prefers-reduced-motion:reduce){.aqua-todo-trigger,.aqua-todo-popover,.aqua-todo-popover__cta,.aqua-todo-add-button{transition-duration:.01ms!important}}.physics-app-header.syllabus-nav{grid-template-columns:auto auto 1fr auto;gap:var(--physics-shell-header-gap);min-height:var(--physics-shell-header-height);padding-inline:var(--physics-shell-header-padding-x);font-family:var(--font-body)}.physics-app-header .syllabus-brand{display:inline-flex;align-items:center;gap:9px;color:var(--color-home-ink);font:700 24px/1 var(--font-display);letter-spacing:-.04em;text-decoration:none}.physics-app-header .syllabus-brand img{width:34px;height:38px}.physics-app-header .syllabus-course{display:inline-flex;align-items:center;gap:9px;min-height:42px;padding:0 13px;border:1px solid var(--color-home-line);border-radius:12px;background:#fff;color:var(--color-home-ink);font:700 13px/1 var(--font-body)}.subject-switcher{position:relative}.subject-switcher__menu{position:absolute;z-index:80;top:calc(100% + 9px);left:0;width:236px;padding:7px;border:1px solid var(--color-home-line);border-radius:14px;background:#fff;box-shadow:0 18px 45px #1b3d5829}.subject-switcher__menu a{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:11px 12px;border-radius:9px;color:var(--color-home-ink);text-decoration:none}.subject-switcher__menu a:hover,.subject-switcher__menu a.is-current{background:var(--color-home-accent-soft)}.subject-switcher__menu span{display:grid;gap:4px}.subject-switcher__menu strong{font:700 13px/1.2 var(--font-body)}.subject-switcher__menu small{color:var(--color-home-muted);font:500 11px/1.2 var(--font-body)}.physics-app-header nav{justify-self:center;align-self:stretch;display:flex;align-items:stretch;gap:34px}.physics-app-header nav a{position:relative;display:grid;place-items:center;padding:0 2px;color:var(--color-home-muted);font:600 14px/1 var(--font-body);text-decoration:none}.physics-app-header nav a:hover,.physics-app-header nav a.active{color:var(--color-home-ink)}.physics-app-header nav a:after{content:"";position:absolute;right:50%;bottom:0;left:50%;height:3px;border-radius:3px 3px 0 0;background:var(--color-home-accent);transition:left var(--dur-ui),right var(--dur-ui)}.physics-app-header nav a:hover:after,.physics-app-header nav a.active:after{right:0;left:0}.physics-app-header .mode-indicator{display:inline-flex;align-items:center;gap:7px;min-height:40px;padding:0 12px;border:1px solid var(--color-home-line);border-radius:var(--radius-pill);background:#fff;color:var(--color-home-ink);font:700 12px/1 var(--font-body)}.physics-app-header__right{display:inline-flex;align-items:center;justify-self:end;gap:12px}.physics-app-header .mode-indicator small{color:var(--color-home-accent-hover);font:700 11px/1 var(--font-body)}.physics-app-header .mode-indicator:hover{border-color:var(--color-home-line-strong);background:var(--color-home-accent-soft)}@media(max-width:980px){.physics-app-header.syllabus-nav{--syllabus-nav-height: 117px}}.progress-popover-root{position:relative;z-index:36;flex:0 0 auto}.stats-trigger{display:inline-flex;align-items:center;gap:7px;height:44px;padding:0 13px;border:1px solid #a8cdfb;border-radius:13px;background:#fbfdff;color:#1673e8;box-shadow:0 4px 12px #2475d714;font:700 13px/1 var(--font-body);cursor:pointer;transition:background .18s,border-color .18s,box-shadow .18s}.stats-trigger:hover,.stats-trigger.is-open{border-color:#6eaaf7;background:#edf6ff;box-shadow:0 6px 16px #2475d71f}.stats-trigger__caret{transition:transform .18s var(--ease-out)}.stats-trigger.is-open .stats-trigger__caret{transform:rotate(180deg)}.progress-popover{position:absolute;top:calc(100% + 9px);right:0;width:min(506px,calc(100vw - 32px));padding:20px 22px 18px;border:1px solid #d7e7f7;border-radius:18px;background:#fff;box-shadow:0 22px 54px #17477b2e;transform-origin:top right;animation:progress-popover-in .19s var(--ease-out) both}.progress-popover:before{content:"";position:absolute;top:-7px;right:56px;width:13px;height:13px;border-top:1px solid #d7e7f7;border-left:1px solid #d7e7f7;background:#fff;transform:rotate(45deg)}.progress-popover__header{position:relative;display:grid;grid-template-columns:48px minmax(0,1fr) 32px;align-items:start;gap:13px}.progress-popover__header>span{display:grid;place-items:center;width:48px;height:48px;border-radius:12px;background:#eaf5ff;color:#1980f4}.progress-popover__header h2{margin:2px 0 4px;color:#102b50;font:700 15px/1.25 var(--font-display)}.progress-popover__header p{margin:0;color:#647c9d;font-size:12px;line-height:1.45}.progress-popover__header button{display:grid;place-items:center;width:32px;height:32px;border:0;border-radius:9px;background:transparent;color:#173d69;cursor:pointer}.progress-popover__header button:hover{background:#f1f7fc}.progress-popover__stats{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:18px}.popover-stat{display:grid;justify-items:center;min-width:0;min-height:128px;padding:15px 7px 12px;border:1px solid rgba(44,103,162,.08);border-radius:14px;text-align:center}.popover-stat>span{display:grid;place-items:center;width:37px;height:37px;margin-bottom:6px;border-radius:11px}.popover-stat strong{color:#102b50;font:700 21px/1 var(--font-display)}.popover-stat small{margin-top:7px;color:#617899;font-size:10px;line-height:1.3}.popover-stat--blue{background:#f2f8ff}.popover-stat--blue>span{color:#1680f8;background:#e6f2ff}.popover-stat--green{background:#f1fbf7}.popover-stat--green>span{color:#11a977;background:#e4f8ef}.popover-stat--coral{background:#fff5f5}.popover-stat--coral>span{color:#ef464b;background:#ffe9e9}.popover-stat--orange{background:#fff8f0}.popover-stat--orange>span{color:#ff8a16;background:#fff0dc}.progress-popover__weekly{display:grid;grid-template-columns:minmax(0,1fr) 120px;gap:17px;margin-top:19px;padding-top:17px;border-top:1px solid #e2ecf5}.progress-popover__chart h3{margin:0 0 10px;color:#102b50;font:700 13px/1.2 var(--font-display)}.mini-bars{display:grid;grid-template-columns:repeat(7,1fr);align-items:end;gap:7px;height:82px}.mini-bars button{display:grid;grid-template-rows:58px 16px;align-items:end;gap:5px;height:100%;border:0;padding:0;background:transparent;color:#6a809d;font-size:9px;cursor:pointer}.mini-bars i{position:relative;display:flex;align-items:end;justify-content:center;width:100%;height:58px;border-bottom:1px solid #dfeaf4}.mini-bars b{display:block;width:min(22px,72%);height:var(--bar-height);min-height:2px;border-radius:5px 5px 2px 2px;background:linear-gradient(#68b4ff,#2f84f4);transform-origin:bottom;animation:mini-bar-in .48s var(--ease-out) var(--bar-delay) both}.mini-bars button:hover b,.mini-bars button:focus-visible b{background:#126fe6}.progress-popover__summary{display:grid;align-content:center;padding-left:18px;border-left:1px solid #e2ecf5}.progress-popover__summary strong{color:#1b7cf0;font:700 29px/1 var(--font-display)}.progress-popover__summary span{margin-top:5px;color:#102b50;font-size:12px;font-weight:700}.progress-popover__summary small{margin-top:8px;color:#0eaa76;font-size:10px;line-height:1.35}.progress-popover__summary small.is-down{color:#d95359}.progress-popover__cta{display:flex;align-items:center;justify-content:center;gap:7px;min-height:42px;margin-top:16px;border-radius:12px;background:#e8f4ff;color:#0873eb;font-size:12px;font-weight:700;text-decoration:none;transition:background .18s,color .18s}.progress-popover__cta:hover{background:#dcedff;color:#075fc1}.progress-popover :is(button,a):focus-visible,.stats-trigger:focus-visible{outline:3px solid rgba(41,139,247,.28);outline-offset:2px}@keyframes progress-popover-in{0%{opacity:0;transform:translateY(-6px) scale(.98)}}@keyframes mini-bar-in{0%{transform:scaleY(0);opacity:.35}}@media(max-width:720px){.progress-popover-root{width:100%}.stats-trigger{width:100%;justify-content:center}.progress-popover{position:fixed;z-index:80;top:calc(var(--syllabus-nav-height) + 10px);right:10px;left:10px;width:auto;max-height:calc(100dvh - var(--syllabus-nav-height) - 20px);overflow-y:auto}.progress-popover:before{display:none}.progress-popover__stats{grid-template-columns:repeat(2,1fr)}.popover-stat{min-height:108px}}@media(max-width:430px){.progress-popover{padding:17px 15px 15px}.progress-popover__header{grid-template-columns:42px minmax(0,1fr) 30px;gap:10px}.progress-popover__header>span{width:42px;height:42px}.progress-popover__weekly{grid-template-columns:1fr}.progress-popover__summary{grid-template-columns:auto 1fr;column-gap:7px;padding:12px 0 0;border-top:1px solid #e2ecf5;border-left:0}.progress-popover__summary small{grid-column:1 / -1}}@media(prefers-reduced-motion:reduce){.progress-popover,.mini-bars b{animation:none}}.syllabus-page{--syllabus-nav-height: var(--physics-shell-header-height);min-height:100dvh;background:var(--physics-shell-background);color:var(--color-home-ink)}.syllabus-page button,.syllabus-page input{font:inherit}.syllabus-nav{--syllabus-nav-height: var(--physics-shell-header-height);position:sticky;z-index:40;top:0;display:grid;grid-template-columns:auto auto 1fr auto;align-items:center;gap:var(--physics-shell-header-gap);min-height:var(--syllabus-nav-height);padding:0 var(--physics-shell-header-padding-x);border-bottom:1px solid var(--color-home-line);background:#fffffff0;-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px)}.syllabus-brand{display:inline-flex;align-items:center;gap:9px;color:var(--color-home-ink);text-decoration:none;font:700 24px/1 var(--font-display);letter-spacing:-.04em}.syllabus-brand img{width:34px;height:38px}.syllabus-course{display:inline-flex;align-items:center;gap:9px;min-height:42px;padding:0 13px;border:1px solid var(--color-home-line);border-radius:12px;background:#fff;color:var(--color-home-ink);font-size:13px;font-weight:700}.syllabus-nav nav{justify-self:center;align-self:stretch;display:flex;align-items:stretch;gap:34px}.syllabus-nav nav a,.syllabus-nav nav button{position:relative;display:grid;place-items:center;border:0;padding:0 2px;background:transparent;color:var(--color-home-muted);text-decoration:none;font-size:14px;font-weight:600}.syllabus-nav nav a:after,.syllabus-nav nav button:after{content:"";position:absolute;right:50%;bottom:0;left:50%;height:3px;border-radius:3px 3px 0 0;background:var(--color-home-accent);transition:left var(--dur-ui),right var(--dur-ui)}.syllabus-nav nav a:hover,.syllabus-nav nav button:hover,.syllabus-nav nav .active{color:var(--color-home-ink)}.syllabus-nav nav a:hover:after,.syllabus-nav nav button:hover:after,.syllabus-nav nav .active:after{right:0;left:0}.mode-indicator{display:inline-flex;align-items:center;gap:7px;min-height:40px;padding:0 12px;border:1px solid var(--color-home-line);border-radius:var(--radius-pill);background:#fff;color:var(--color-home-ink);font-size:12px;font-weight:700;transition:border-color var(--dur-fast),background var(--dur-fast)}.mode-indicator svg{color:var(--color-home-accent-hover)}.mode-indicator small{color:var(--color-home-accent-hover);font-size:11px}.mode-indicator:hover{border-color:var(--color-home-line-strong);background:var(--color-home-accent-soft)}.unit-navigator{position:fixed;z-index:20;top:var(--syllabus-nav-height);bottom:0;left:0;display:flex;flex-direction:column;width:238px;padding:24px 18px;overflow-y:auto;border-right:1px solid var(--color-home-line);background:#ffffffe0}.unit-navigator__intro{display:grid;padding:0 10px 18px}.unit-navigator__intro span{color:var(--color-home-accent-hover);font-size:11px;font-weight:700;letter-spacing:.04em;text-transform:uppercase}.unit-navigator__intro strong{margin-top:8px;font:600 14px/1.3 var(--font-display)}.unit-navigator__intro small{margin-top:3px;color:var(--color-home-muted)}.overall-progress{display:grid;gap:11px;margin-bottom:18px;padding:15px;border:1px solid var(--color-home-line);border-radius:14px;background:#fff}.overall-progress>span{display:flex;justify-content:space-between;gap:8px;font-size:12px}.overall-progress b{color:var(--color-home-accent-hover)}.overall-progress small{color:var(--color-home-muted);font-size:10px}.unit-navigator nav{display:grid;gap:4px}.unit-navigator nav button{display:grid;grid-template-columns:31px minmax(0,1fr);align-items:start;gap:10px;width:100%;min-height:58px;padding:10px;border:0;border-radius:12px;background:transparent;color:var(--color-home-muted);text-align:left;transition:background .18s,color .18s}.unit-navigator nav button:hover{background:var(--color-home-accent-soft);color:var(--color-home-ink)}.unit-navigator nav button>span:first-child{display:grid;place-items:center;width:29px;height:29px;border-radius:10px;background:#f0f5fa;color:var(--color-home-ink);font-size:12px;font-weight:700}.unit-navigator nav button>span:last-child{display:grid;gap:4px}.unit-navigator nav strong{font-size:12px;line-height:1.35}.unit-navigator nav small{color:var(--color-home-muted);font-size:10px}.navigator-help{display:flex;align-items:flex-start;gap:10px;margin-top:auto;padding:14px;border:1px solid var(--color-home-line);border-radius:14px;background:#fff;color:var(--color-home-accent-hover)}.navigator-help div{display:grid;gap:3px}.navigator-help strong{color:var(--color-home-ink);font-size:12px}.navigator-help button{border:0;padding:0;background:transparent;color:var(--color-home-muted);text-align:left;font-size:10px}.syllabus-main{width:min(960px,calc(100% - 626px));margin:0 362px 0 264px;padding:34px 0 90px;scroll-margin-top:calc(var(--syllabus-nav-height) + 14px);animation:syllabus-enter .52s var(--ease-out) both}.syllabus-heading{display:flex;align-items:end;justify-content:space-between;gap:24px}.syllabus-heading>div:first-child>span{color:var(--color-home-accent-hover);font-size:13px;font-weight:700}.syllabus-heading h1{margin:4px 0;font:700 clamp(32px,3.2vw,44px)/1.05 var(--font-display);letter-spacing:-.045em}.syllabus-heading p{margin:0;color:var(--color-home-muted);font-size:14px}.syllabus-toolbar{display:flex;align-items:center;justify-content:flex-end;gap:12px;flex:1 1 auto}.syllabus-search{position:relative;display:flex;align-items:center;flex:0 1 340px;min-width:250px;height:46px;padding:0 13px;border:1px solid var(--color-home-line);border-radius:13px;background:#fff;color:var(--color-home-muted);transition:border-color var(--dur-fast),box-shadow var(--dur-fast)}.syllabus-search:focus-within{border-color:var(--color-home-line-strong);box-shadow:0 0 0 3px #3f8df51a}.syllabus-search input{min-width:0;width:100%;border:0;outline:0;padding:0 8px;background:transparent;color:var(--color-home-ink);font-size:13px}.syllabus-search>button{display:grid;place-items:center;width:32px;height:32px;border:0;border-radius:9px;background:transparent}.search-results{position:absolute;z-index:35;top:calc(100% + 8px);right:0;width:min(480px,calc(100vw - 32px));max-height:480px;overflow-y:auto;border:1px solid var(--color-home-line);border-radius:14px;background:#fff;box-shadow:0 18px 46px #103b7029}.search-results header{display:flex;align-items:center;gap:8px;padding:12px 14px;border-bottom:1px solid var(--color-home-line);color:var(--color-home-muted);font-size:11px;font-weight:700}.search-results>button{display:grid;gap:4px;width:100%;padding:12px 14px;border:0;border-bottom:1px solid var(--color-home-line);background:#fff;text-align:left}.search-results>button:hover{background:var(--color-home-accent-soft)}.search-results>button span{color:var(--color-home-accent-hover);font-size:10px;font-weight:700;text-transform:uppercase}.search-results>button strong{display:-webkit-box;overflow:hidden;color:var(--color-home-ink);font-size:12px;font-weight:600;line-height:1.45;-webkit-box-orient:vertical;-webkit-line-clamp:2}.aqua-guide{display:grid;grid-template-columns:78px minmax(0,1fr) 42px;align-items:center;gap:14px;margin-top:24px;padding:11px 12px;border:1px solid var(--color-home-line-strong);border-radius:16px;background:var(--color-home-accent-soft)}.aqua-guide__mascot{width:74px;height:68px;overflow:hidden}.aqua-guide__mascot .aqua-mascot{width:74px}.aqua-guide strong{font:700 15px/1.3 var(--font-display)}.aqua-guide p{margin:3px 0 0;color:var(--color-home-muted);font-size:12px}.aqua-guide>button{display:grid;place-items:center;width:40px;height:40px;border:0;border-radius:10px;background:transparent}.aqua-guide>button:hover{background:#fff}.syllabus-summary{display:flex;align-items:center;gap:20px;margin:22px 0 12px;color:var(--color-home-muted);font-size:11px}.syllabus-summary span{display:inline-flex;align-items:center;gap:6px}.syllabus-summary svg{color:var(--color-home-accent-hover)}.syllabus-sections{display:grid;gap:10px}.syllabus-section{scroll-margin-top:calc(var(--syllabus-nav-height) + 14px);overflow:clip;border:1px solid var(--color-home-line);border-radius:16px;background:#fff}.section-row{display:grid;grid-template-columns:38px minmax(0,1fr) auto 46px 22px;align-items:center;gap:12px;width:100%;min-height:66px;padding:11px 16px;border:0;background:linear-gradient(90deg,#edf6ffbf,#fff);text-align:left;transition:background .18s}.section-row:hover{background:var(--color-home-accent-soft)}.section-number{display:grid;place-items:center;width:36px;height:36px;border-radius:11px;background:var(--color-home-accent);color:#fff;font-weight:700}.section-title{display:grid;gap:2px}.section-title strong{font:700 17px/1.25 var(--font-display)}.section-title small{color:var(--color-home-muted);font-size:10px}.section-progress{color:var(--color-home-muted);font-size:11px;white-space:nowrap}.section-percent{color:var(--color-home-accent-hover);font-size:11px;font-weight:700}.section-chevron{transition:transform .22s var(--ease-out)}.section-row[aria-expanded=true] .section-chevron{transform:rotate(180deg)}.accordion-content{display:grid;grid-template-rows:0fr;opacity:.65;transition:grid-template-rows .26s var(--ease-out),opacity .22s var(--ease-out)}.accordion-content>div{min-height:0;overflow:hidden}.accordion-content.is-open{grid-template-rows:1fr;opacity:1}.syllabus-topic{border-top:1px solid var(--color-home-line);scroll-margin-top:calc(var(--syllabus-nav-height) + 12px)}.topic-row{display:grid;grid-template-columns:58px minmax(0,1fr) auto 20px;align-items:center;gap:10px;width:100%;min-height:54px;padding:8px 16px 8px 20px;border:0;background:#fff;text-align:left;transition:background .18s}.topic-row:hover{background:#f9fcff}.topic-number{color:var(--color-home-accent-hover);font-size:12px;font-weight:700}.topic-title{display:grid;gap:1px}.topic-title small{color:var(--color-home-muted);font-size:9px}.topic-title strong{font-size:13px;line-height:1.35}.topic-progress{color:var(--color-home-muted);font-size:10px;white-space:nowrap}.topic-chevron{color:var(--color-home-muted);transition:transform .22s var(--ease-out)}.topic-row[aria-expanded=true] .topic-chevron{transform:rotate(90deg)}.objective-columns{display:grid;grid-template-columns:1fr 1fr;border-top:1px solid var(--color-home-line);background:#fff}.objective-columns--single{grid-template-columns:1fr}.objective-group+.objective-group{border-left:1px solid var(--color-home-line)}.objective-group h3{display:flex;align-items:center;gap:7px;min-height:42px;margin:0;padding:0 16px;border-bottom:1px solid var(--color-home-line);color:var(--color-home-accent-hover);font-size:11px;letter-spacing:.06em;text-transform:uppercase}.objective-group--supplement h3{color:#6656c7}.objective-group h3 span{display:grid;place-items:center;min-width:20px;height:20px;padding:0 5px;border-radius:var(--radius-pill);background:var(--color-home-accent-soft);font-size:9px}.objective-group--supplement h3 span{background:#f1efff}.objective-row{position:relative;display:grid;grid-template-columns:26px minmax(0,1fr) auto 16px;align-items:start;gap:8px;width:100%;min-height:62px;padding:12px 14px;border:0;border-bottom:1px solid #edf2f7;background:#fff;color:var(--color-home-ink);text-align:left;transition:background .18s var(--ease-out),color .18s var(--ease-out)}.objective-row:last-child{border-bottom:0}.objective-row:hover,.objective-row.is-selected{background:var(--color-home-accent-soft)}.objective-row.is-locked{color:#6f7f94;background:#fcfdff}.objective-row.is-locked:hover{background:#f3f7fb}.objective-number{color:var(--color-home-accent-hover);font-size:11px;font-weight:700}.objective-group--supplement .objective-number{color:#6656c7}.objective-text{font-size:13px;line-height:1.52}.objective-status{display:inline-flex;align-items:center;gap:5px;padding-top:1px;color:var(--color-home-muted);font-size:9px;white-space:nowrap}.objective-status.is-start{padding:4px 7px;border-radius:var(--radius-pill);background:var(--color-home-accent);color:#fff;font-weight:700;letter-spacing:.03em;text-transform:uppercase}.objective-arrow{margin-top:1px;color:var(--color-home-muted);transition:transform .18s var(--ease-out),color .18s}.objective-row:hover .objective-arrow{color:var(--color-home-accent-hover);transform:translate(3px)}.objective-panel{position:fixed;z-index:24;top:calc(var(--syllabus-nav-height) + 24px);right:22px;width:318px;max-height:calc(100dvh - var(--syllabus-nav-height) - 48px);overflow-y:auto;border:1px solid var(--color-home-line);border-radius:18px;background:#fff;box-shadow:0 16px 42px var(--color-home-shadow)}.objective-panel__mobile-close{display:none}.objective-panel__empty{display:grid;place-items:center;min-height:360px;padding:28px;color:var(--color-home-muted);text-align:center}.objective-panel__empty svg{color:var(--color-home-accent)}.objective-panel__empty strong{margin-top:12px;color:var(--color-home-ink);font:700 17px/1.25 var(--font-display)}.objective-panel__empty p{margin:7px 0 0;font-size:12px}.objective-detail{padding:22px}.detail-tier{display:inline-flex;padding:6px 9px;border-radius:var(--radius-pill);background:var(--color-home-accent-soft);color:var(--color-home-accent-hover);font-size:10px;font-weight:700;text-transform:uppercase}.detail-tier--supplement{background:#f1efff;color:#6656c7}.objective-detail h2{margin:16px 0 8px;font:700 19px/1.35 var(--font-display);letter-spacing:-.015em}.detail-part{margin:0 0 18px;color:var(--color-home-muted);font-size:11px;line-height:1.45}.detail-locked{display:flex;align-items:flex-start;gap:10px;margin-bottom:13px;padding:11px;border-radius:12px;background:#f3f6f9;color:#718196}.detail-locked span{display:grid;font-size:10px}.detail-locked strong{color:var(--color-home-ink);font-size:11px}.detail-start,.detail-complete{display:flex;align-items:center;justify-content:center;gap:8px;width:100%;min-height:44px;border-radius:12px;font-size:12px;font-weight:700;transition:background .18s,transform .16s,border-color .18s}.detail-start{border:1px solid var(--color-home-accent);background:var(--color-home-accent);color:#fff}.detail-complete{margin-top:9px;border:1px solid var(--color-home-line);background:#fff;color:var(--color-home-ink)}.detail-complete.is-complete{border-color:#8bd2b7;background:#effbf6;color:#137555}.detail-start:not(:disabled):hover{background:var(--color-home-accent-hover)}.detail-complete:not(:disabled):hover{border-color:var(--color-home-line-strong);background:var(--color-home-accent-soft)}.detail-start:not(:disabled):active,.detail-complete:not(:disabled):active{transform:scale(.98)}.detail-start:disabled,.detail-complete:disabled{border-color:#d7e0e9;background:#e7edf3;color:#7d8da0}.detail-official{margin-top:20px;padding:16px 0;border-top:1px solid var(--color-home-line);border-bottom:1px solid var(--color-home-line)}.detail-official span{color:var(--color-home-muted);font-size:9px;font-weight:700;letter-spacing:.05em;text-transform:uppercase}.detail-official p{margin:8px 0 0;color:#435873;font-size:12px;line-height:1.55}.detail-plan{padding-top:17px}.detail-plan h3{margin:0 0 10px;font:700 13px/1.2 var(--font-display)}.detail-plan ul{display:grid;gap:10px;margin:0;padding:0;list-style:none}.detail-plan li{display:flex;align-items:flex-start;gap:9px;color:var(--color-home-accent-hover)}.detail-plan li span{display:grid}.detail-plan li strong{color:var(--color-home-ink);font-size:11px}.detail-plan li small{color:var(--color-home-muted);font-size:9px}.detail-source{display:grid;gap:3px;margin-top:18px;padding-top:14px;border-top:1px solid var(--color-home-line)}.detail-source strong{font-size:10px}.detail-source span{color:var(--color-home-muted);font-size:9px}.objective-panel__scrim{display:none}.syllabus-page .toast{z-index:95}.syllabus-page :is(button,a,input):focus-visible{outline:3px solid var(--color-home-focus);outline-offset:2px}@keyframes syllabus-enter{0%{opacity:0;transform:translateY(9px)}}@media(max-width:1280px){.unit-navigator{display:none}.syllabus-main{width:min(850px,calc(100% - 374px));margin-left:26px}}@media(max-width:980px){.syllabus-nav{--syllabus-nav-height: 117px;grid-template-columns:auto auto 1fr;padding-inline:18px}.syllabus-nav nav{order:4;grid-column:1 / -1;justify-self:stretch;height:48px;justify-content:space-around;border-top:1px solid var(--color-home-line)}.syllabus-page{--syllabus-nav-height: 117px}.mode-indicator{justify-self:end}.syllabus-main{width:min(100% - 36px,900px);margin-inline:auto}.objective-panel{z-index:71;inset:auto 0 0;width:100%;max-height:min(84dvh,740px);border-radius:22px 22px 0 0;transform:translateY(105%);opacity:0;transition:transform .28s var(--ease-out),opacity .22s}.objective-panel.is-mobile-open{transform:translateY(0);opacity:1}.objective-panel__mobile-close{position:sticky;z-index:2;top:10px;float:right;display:grid;place-items:center;width:44px;height:44px;margin:10px 10px -54px 0;border:1px solid var(--color-home-line);border-radius:12px;background:#fff}.objective-panel__scrim{position:fixed;z-index:70;inset:0;display:block;border:0;background:#0a1e3a52}.objective-detail{max-width:680px;margin-inline:auto;padding:26px 24px calc(28px + env(safe-area-inset-bottom))}}@media(max-width:720px){.syllabus-nav{gap:10px;padding-inline:12px}.syllabus-brand span{display:none}.syllabus-brand img{width:32px}.syllabus-course{padding-inline:10px;font-size:12px}.mode-indicator span{display:none}.mode-indicator small{font-size:10px}.syllabus-nav nav{gap:0;overflow-x:auto}.syllabus-nav nav a,.syllabus-nav nav button{min-width:72px;font-size:12px}.syllabus-main{width:100%;padding:25px 12px 80px}.syllabus-heading{display:grid;align-items:start}.syllabus-heading h1{font-size:34px}.syllabus-toolbar{display:grid;grid-template-columns:auto minmax(0,1fr);width:100%}.syllabus-search{width:100%;min-width:0}.syllabus-summary{gap:12px;overflow-x:auto}.syllabus-summary span{white-space:nowrap}.aqua-guide{grid-template-columns:60px minmax(0,1fr) 40px}.aqua-guide__mascot,.aqua-guide__mascot .aqua-mascot{width:58px}.section-row{grid-template-columns:36px minmax(0,1fr) 20px;padding-inline:12px}.section-progress,.section-percent{display:none}.topic-row{grid-template-columns:54px minmax(0,1fr) 18px;padding-inline:12px}.topic-progress{display:none}.objective-columns{grid-template-columns:1fr}.objective-group+.objective-group{border-top:1px solid var(--color-home-line);border-left:0}.objective-row{grid-template-columns:24px minmax(0,1fr) 16px;min-height:68px;padding:13px 12px}.objective-status{grid-column:2;margin-top:5px}.objective-arrow{grid-column:3;grid-row:1}.objective-detail h2{padding-right:42px}}@media(max-width:520px){.syllabus-toolbar{grid-template-columns:1fr}}@media(prefers-reduced-motion:reduce){.syllabus-main{animation:none}.accordion-content,.objective-panel{transition:none}.objective-row:hover .objective-arrow{transform:none}}.syllabus-page--modules .syllabus-main{width:min(1040px,calc(100% - 626px))}.syllabus-page--modules .syllabus-summary{flex-wrap:wrap}.topic-row--module{display:grid;grid-template-columns:minmax(0,1fr) auto auto;min-height:78px;padding:0 14px 0 0;transition:background .18s var(--ease-out)}.topic-row--module:hover{background:#f9fcff}.topic-toggle{display:grid;grid-template-columns:64px minmax(0,1fr) 20px;align-items:center;gap:10px;min-width:0;min-height:76px;padding:8px 12px 8px 20px;border:0;background:transparent;color:var(--color-home-ink);text-align:left}.topic-toggle .topic-title em{margin-top:3px;color:var(--color-home-muted);font-size:10px;font-style:normal;font-weight:500}.topic-toggle[aria-expanded=true] .topic-chevron{transform:rotate(90deg)}.topic-learning-status{display:inline-flex;align-items:center;gap:6px;min-width:102px;color:var(--color-home-muted);font-size:10px;white-space:nowrap}.topic-learning-status.is-mastered{color:#137555;font-weight:700}.topic-primary-cta{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-width:108px;min-height:38px;padding:0 12px;border:1px solid var(--color-home-accent);border-radius:11px;background:var(--color-home-accent);color:#fff;text-decoration:none;font-size:10px;font-weight:700;white-space:nowrap;transition:background .18s var(--ease-out),transform .16s var(--ease-out),border-color .18s}.topic-primary-cta:not(:disabled):hover{background:var(--color-home-accent-hover);transform:translateY(-1px)}.topic-primary-cta:not(:disabled):hover svg{transform:translate(3px)}.topic-primary-cta svg{transition:transform .18s var(--ease-out)}.topic-primary-cta:disabled{border-color:#d6e0e9;background:#e7edf3;color:#7b8b9e}.topic-modules{border-top:1px solid var(--color-home-line);background:#f8fbfe}.topic-modules>header,.official-syllabus-block>header{display:flex;align-items:center;justify-content:space-between;gap:14px;min-height:45px;padding:0 16px}.topic-modules>header>span,.official-syllabus-block>header>span{color:var(--color-home-ink);font-size:11px;font-weight:700;letter-spacing:.055em;text-transform:uppercase}.topic-modules>header small,.official-syllabus-block>header small{color:var(--color-home-muted);font-size:10px}.topic-modules>div{display:grid;gap:8px;padding:0 14px 14px}.module-row{display:grid;grid-template-columns:38px minmax(0,1fr) auto;align-items:center;gap:12px;padding:13px 14px;border:1px solid var(--color-home-line);border-radius:13px;background:#fff;transition:background .18s var(--ease-out),border-color .18s var(--ease-out)}.module-row:hover{border-color:var(--color-home-line-strong);background:var(--color-home-accent-soft)}.module-row.is-locked{background:#f8fafc;color:#718196}.module-row__icon{display:grid;place-items:center;width:36px;height:36px;border-radius:11px;background:var(--color-home-accent-soft);color:var(--color-home-accent-hover)}.module-row.is-locked .module-row__icon{background:#e9eef3;color:#7d8da0}.module-row>div{min-width:0}.module-row>div>strong{font:700 13px/1.3 var(--font-display)}.module-row p{margin:3px 0 6px;color:var(--color-home-muted);font-size:11px;line-height:1.45}.module-row>div>span{display:flex;align-items:center;gap:5px;color:var(--color-home-muted);font-size:9px}.module-row>div>span b{margin-left:8px;color:var(--color-home-accent-hover);font-weight:600}.module-row>button{display:inline-flex;align-items:center;gap:6px;min-height:36px;padding:0 10px;border:0;border-radius:10px;background:transparent;color:var(--color-home-accent-hover);font-size:10px;font-weight:700;white-space:nowrap}.module-row>button:not(:disabled):hover{background:#fff}.module-row>button:not(:disabled):hover svg{transform:translate(3px)}.module-row>button svg{transition:transform .18s var(--ease-out)}.module-row>button:disabled{color:#7d8da0}.official-syllabus-block{background:#fff}.official-syllabus-block>header{border-top:1px solid var(--color-home-line)}.requirement-group h3{min-height:39px}.requirement-row{display:grid;grid-template-columns:18px 27px minmax(0,1fr);align-items:start;gap:7px;min-height:54px;padding:11px 14px;border-bottom:1px solid #edf2f7;background:#fff;transition:background .16s var(--ease-out)}.requirement-row:last-child{border-bottom:0}.requirement-row:hover{background:#fbfdff}.requirement-row p{margin:0;color:#40546f;font-size:13px;line-height:1.52}.requirement-state{display:grid;place-items:center;padding-top:1px;color:#a6b4c4}.requirement-row.is-covered{background:#f8fbff}.requirement-row.is-covered .requirement-state{color:var(--color-home-accent-hover)}.requirement-row.is-mastered .requirement-state{color:#16825f}.requirement-row .objective-number{padding-top:1px}.module-detail{padding:22px}.module-detail h2{margin:15px 0 7px;font:700 22px/1.25 var(--font-display);letter-spacing:-.02em}.module-detail__description{margin:0;color:var(--color-home-muted);font-size:12px;line-height:1.55}.module-detail__meta{display:flex;align-items:center;gap:12px;margin:13px 0 17px;color:var(--color-home-muted);font-size:10px}.module-detail__meta span{display:inline-flex;align-items:center;gap:5px}.module-concepts,.module-covers{margin-top:20px;padding-top:17px;border-top:1px solid var(--color-home-line)}.module-concepts h3,.module-covers h3{margin:0 0 11px;font:700 13px/1.25 var(--font-display)}.module-concepts ul{display:flex;flex-wrap:wrap;gap:7px;margin:0;padding:0;list-style:none}.module-concepts li{padding:5px 8px;border-radius:8px;background:var(--color-home-accent-soft);color:#48617e;font-size:9px}.module-covers>div{padding:10px 0;border-bottom:1px solid #edf2f7}.module-covers>div:last-child{border-bottom:0}.module-covers span{color:var(--color-home-accent-hover);font-size:9px;font-weight:700;text-transform:uppercase}.module-covers p{margin:4px 0 0;color:#435873;font-size:11px;line-height:1.48}.mastery-separation{margin-top:17px;padding:13px;border-radius:12px;background:#f4f8fc}.mastery-separation strong{font-size:11px}.mastery-separation p{margin:4px 0 0;color:var(--color-home-muted);font-size:9px;line-height:1.45}@media(max-width:1280px){.syllabus-page--modules .syllabus-main{width:min(900px,calc(100% - 374px))}}@media(max-width:980px){.syllabus-page--modules .syllabus-main{width:min(100% - 36px,920px)}}@media(max-width:720px){.topic-row--module{grid-template-columns:minmax(0,1fr) auto;padding:0 10px 11px 0}.topic-toggle{grid-column:1 / -1;grid-template-columns:52px minmax(0,1fr) 18px;width:100%;padding:8px 10px 4px 12px}.topic-learning-status{margin-left:64px;min-width:0}.topic-primary-cta{min-width:104px}.topic-modules>header,.official-syllabus-block>header{align-items:flex-start;flex-direction:column;gap:3px;padding-block:11px}.module-row{grid-template-columns:34px minmax(0,1fr)}.module-row>button{grid-column:2;justify-self:start;padding-inline:0}.requirement-row{grid-template-columns:18px 25px minmax(0,1fr);padding-inline:11px}.requirement-row p{font-size:13px}.module-detail h2{padding-right:42px}}@media(prefers-reduced-motion:reduce){.topic-primary-cta,.topic-primary-cta svg,.module-row>button svg{transition:none}}.section-review-entry{margin:16px 16px 20px;padding:16px;border:1px solid var(--color-home-line);border-radius:14px;background:linear-gradient(110deg,#f7fbff,#fff 72%)}.section-review-entry>header{display:flex;align-items:end;justify-content:space-between;gap:18px;padding:0 2px 12px}.section-review-entry>header span{color:var(--color-home-accent-hover);font-size:9px;font-weight:700;letter-spacing:.05em;text-transform:uppercase}.section-review-entry>header h3{margin:3px 0 0;font:700 14px/1.2 var(--font-display);letter-spacing:.02em}.section-review-entry>header small{color:var(--color-home-muted);font-size:10px}.section-review-entry__links{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.section-review-entry__links a{display:grid;grid-template-columns:24px minmax(0,1fr) 15px;align-items:center;gap:8px;min-height:60px;padding:10px;border:1px solid var(--color-home-line);border-radius:11px;background:#fff;color:var(--color-home-accent-hover);text-decoration:none;transition:border-color .18s,background .18s,transform .18s}.section-review-entry__links a:hover{border-color:var(--color-home-line-strong);background:var(--color-home-accent-soft);transform:translateY(-1px)}.section-review-entry__links a>span{display:grid;gap:3px}.section-review-entry__links strong{color:var(--color-home-ink);font-size:11px}.section-review-entry__links small{color:var(--color-home-muted);font-size:9px;line-height:1.35}.section-review-entry__links a>svg:last-child{color:var(--color-home-muted)}@media(max-width:720px){.section-review-entry>header{display:grid;gap:5px}.section-review-entry__links{grid-template-columns:1fr}}.aqua-celebration{position:fixed;z-index:90;inset:0;display:grid;place-items:center;pointer-events:none}.aqua-celebration__stage{position:relative;width:min(250px,52vw);aspect-ratio:1 / 1.14;animation:aqua-celebration-enter .18s var(--ease-out) both}.aqua-celebration__character{position:absolute;z-index:2;right:0;bottom:0;width:78%;height:auto;-webkit-user-select:none;user-select:none;transform-origin:50% 88%;filter:drop-shadow(0 13px 14px rgba(34,135,211,.17));animation:aqua-celebration-jump 1.9s both;will-change:transform}.aqua-celebration__burst{position:absolute;z-index:1;inset:0}.aqua-celebration__particle{position:absolute;left:51%;top:50%;display:block;width:7px;height:11px;border-radius:2px;background:var(--particle-color);opacity:0;transform:translate(-50%,-50%);animation:aqua-celebration-particle 1.12s calc(.61s + var(--particle-delay)) cubic-bezier(.19,.74,.25,1) both;will-change:transform,opacity}.aqua-celebration__particle--ribbon{width:4px;height:17px;border-radius:999px}.aqua-celebration__particle--dot{width:7px;height:7px;border-radius:50%}.aqua-celebration__particle--star{width:11px;height:11px;border-radius:0;clip-path:polygon(50% 0%,61% 36%,100% 50%,61% 64%,50% 100%,39% 64%,0% 50%,39% 36%)}@keyframes aqua-celebration-enter{0%{opacity:0;transform:scale(.96)}to{opacity:1;transform:scale(1)}}@keyframes aqua-celebration-jump{0%{transform:translateZ(0) scale(1)}12%{transform:translate3d(0,5px,0) scale(1.045,.935)}24%{transform:translate3d(0,-20px,0) scale(.99,1.025)}34%{transform:translate3d(0,-51px,0) scale(.98,1.045)}46%{transform:translate3d(0,-59px,0) scale(1.012,.99)}56%{transform:translate3d(0,-54px,0) scale(1.006,.997)}67%{transform:translate3d(0,-32px,0) scale(1)}73%{transform:translateZ(0) scale(1.045,.94)}81%{transform:translate3d(0,-8px,0) scale(.992,1.02)}90%{transform:translateZ(0) scale(1.014,.99)}to{transform:translateZ(0) scale(1)}}@keyframes aqua-celebration-particle{0%{opacity:0;transform:translate(-50%,-50%) rotate(var(--particle-rotate))}8%{opacity:1}58%{opacity:1;transform:translate(calc(-50% + var(--particle-x)),calc(-50% + var(--particle-y))) rotate(calc(var(--particle-rotate) + var(--particle-spin)))}to{opacity:0;transform:translate(calc(-50% + var(--particle-x)),calc(-50% + var(--particle-y) + 39px)) rotate(calc(var(--particle-rotate) + var(--particle-spin) + 90deg))}}@media(max-width:520px){.aqua-celebration__stage{width:min(218px,62vw)}}@media(prefers-reduced-motion:reduce){.aqua-celebration__stage,.aqua-celebration__character,.aqua-celebration__particle{animation:none}}.lesson-page{--lesson-nav: 68px;min-height:100dvh;background:#fafdff;color:var(--color-home-ink)}.lesson-page button,.lesson-page input{font:inherit}.lesson-page :is(button,a,input):focus-visible{outline:3px solid var(--color-home-focus);outline-offset:3px}.lesson-topbar{position:sticky;z-index:60;top:0;display:grid;grid-template-columns:auto auto minmax(360px,1fr) auto;align-items:center;gap:24px;height:var(--lesson-nav);padding:0 28px;border-bottom:1px solid var(--color-home-line);background:#fffffff5;-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px)}.lesson-topbar .syllabus-brand{font-size:24px}.lesson-topbar nav{align-self:stretch;justify-self:center;display:flex;gap:34px}.lesson-topbar nav :is(a,button){position:relative;display:grid;place-items:center;border:0;padding:0 3px;background:transparent;color:var(--color-home-muted);text-decoration:none;font-size:14px;font-weight:600}.lesson-topbar nav :is(a,button):after{content:"";position:absolute;right:50%;bottom:0;left:50%;height:3px;border-radius:3px 3px 0 0;background:var(--color-home-accent);transition:right .18s,left .18s}.lesson-topbar nav :is(a,button):hover,.lesson-topbar nav .active{color:var(--color-home-ink)}.lesson-topbar nav :is(a,button):hover:after,.lesson-topbar nav .active:after{right:0;left:0}.lesson-user-actions{justify-self:end;display:flex;align-items:center;gap:7px}.lesson-user-actions>button{display:grid;place-items:center;width:42px;height:42px;border:0;border-radius:12px;background:transparent}.lesson-user-actions>button:hover{background:var(--color-home-accent-soft)}.lesson-streak{display:flex;align-items:center;gap:5px;min-height:40px;padding:0 13px;border:1px solid var(--color-home-line);border-radius:var(--radius-pill);color:var(--color-home-muted);font-size:12px}.lesson-streak svg{color:#ee6f45}.lesson-streak b{color:var(--color-home-ink)}.lesson-menu{display:none}.lesson-sidebar{position:fixed;z-index:30;top:var(--lesson-nav);bottom:0;left:0;width:268px;padding:24px 18px 32px;overflow-y:auto;border-right:1px solid var(--color-home-line);background:#fff}.panel-close{display:none}.back-to-syllabus{display:inline-flex;align-items:center;gap:7px;min-height:38px;color:var(--color-home-muted);text-decoration:none;font-size:12px;font-weight:600}.back-to-syllabus:hover{color:var(--color-home-accent-hover)}.sidebar-topic{display:grid;gap:5px;margin-top:15px;padding-bottom:20px;border-bottom:1px solid var(--color-home-line)}.sidebar-topic>span{color:var(--color-home-accent-hover);font-size:13px;font-weight:700}.sidebar-topic strong{font:700 15px/1.4 var(--font-display)}.sidebar-topic small{color:var(--color-home-muted);font-size:10px;line-height:1.5}.sidebar-modules,.sidebar-steps,.sidebar-coverage{margin-top:20px}.sidebar-modules>header,.sidebar-steps>header{margin-bottom:9px;color:var(--color-home-muted);font-size:10px;font-weight:700;letter-spacing:.04em;text-transform:uppercase}.sidebar-modules :is(article,a){display:grid;grid-template-columns:30px minmax(0,1fr) auto;align-items:center;gap:9px;min-height:66px;padding:9px 10px;border-left:2px solid transparent;border-radius:0 12px 12px 0;color:var(--color-home-muted);text-decoration:none}.sidebar-modules a:hover{background:#f6faff;color:var(--color-home-ink)}.sidebar-modules :is(article,a).is-current{border-left-color:var(--color-home-accent);background:var(--color-home-accent-soft);color:var(--color-home-ink)}.sidebar-modules :is(article,a)>span,.sidebar-steps>div>span{display:grid;place-items:center;width:28px;height:28px;border-radius:9px;background:#eef3f8;font-size:11px;font-weight:700}.sidebar-modules :is(article,a).is-current>span{background:var(--color-home-accent);color:#fff}.sidebar-modules :is(article,a) div{display:grid;gap:3px}.sidebar-modules :is(article,a) strong{font-size:11px;line-height:1.35}.sidebar-modules :is(article,a) small{color:var(--color-home-muted);font-size:9px}.sidebar-steps{padding-top:16px;border-top:1px solid var(--color-home-line)}.sidebar-steps>div{display:grid;grid-template-columns:28px minmax(0,1fr);align-items:center;gap:9px;min-height:45px;padding:4px 6px;color:var(--color-home-muted)}.sidebar-steps>div.is-current{color:var(--color-home-accent-hover)}.sidebar-steps>div.is-complete>span{background:#e6f7ef;color:#16845a}.sidebar-steps>div.is-locked{opacity:.5}.sidebar-steps p{display:grid;margin:0;font-size:11px;font-weight:700}.sidebar-steps small{font-size:9px;font-weight:500}.sidebar-coverage{padding-top:18px;border-top:1px solid var(--color-home-line)}.sidebar-coverage>header{display:flex;align-items:center;gap:7px;color:var(--color-home-ink);font-size:11px;font-weight:700}.sidebar-coverage>header svg{color:var(--color-home-accent-hover)}.sidebar-coverage>span{display:block;margin:9px 0;color:var(--color-home-accent-hover);font-size:9px;font-weight:700;text-transform:uppercase}.sidebar-coverage>div{display:grid;grid-template-columns:20px minmax(0,1fr);gap:7px;padding:7px 0;color:var(--color-home-muted)}.sidebar-coverage b{font-size:10px}.sidebar-coverage p{display:-webkit-box;margin:0;overflow:hidden;font-size:9px;line-height:1.45;-webkit-box-orient:vertical;-webkit-line-clamp:2}.sidebar-coverage>div.is-covered{color:var(--color-home-ink)}.lesson-main{width:min(930px,calc(100% - 626px));margin:0 340px 0 286px;padding:30px 0 80px}.lesson-heading{position:relative;display:grid;grid-template-columns:minmax(0,1fr) 92px;align-items:start;min-height:132px}.lesson-heading__copy>span{color:var(--color-home-accent-hover);font-size:12px;font-weight:700}.lesson-heading h1{display:flex;align-items:center;gap:8px;margin:5px 0 7px;font:700 clamp(28px,2.4vw,38px)/1.1 var(--font-display);letter-spacing:-.04em}.lesson-heading h1 svg{flex:0 0 auto;color:var(--color-home-muted)}.lesson-heading__copy p{max-width:720px;margin:0;color:var(--color-home-muted);font-size:14px;line-height:1.6}.lesson-heading__aqua{align-self:center;width:82px;margin-top:-8px}.lesson-heading__aqua .aqua-mascot{animation-duration:4.4s}.lesson-progress{grid-column:1 / -1;display:grid;grid-template-columns:minmax(220px,1fr);gap:5px;width:min(480px,100%);margin-top:14px}.lesson-progress>span{display:flex;justify-content:space-between;color:var(--color-home-muted);font-size:10px}.lesson-progress>span b{color:var(--color-home-ink)}.lesson-progress>span strong{color:var(--color-home-accent-hover)}.lesson-progress>div{height:7px;overflow:hidden;border-radius:var(--radius-pill);background:#e6eef7}.lesson-progress i{display:block;height:100%;border-radius:inherit;background:var(--color-home-accent);transition:width .32s var(--ease-out)}.lesson-progress small{color:var(--color-home-muted);font-size:9px}.lesson-stepper{display:grid;grid-template-columns:repeat(auto-fit,minmax(88px,1fr));gap:4px;margin:24px 0 14px;padding:9px;border:1px solid var(--color-home-line);border-radius:16px;background:#fff;box-shadow:0 8px 24px #18539a0b}.lesson-stepper button{display:grid;grid-template-columns:30px minmax(0,1fr);grid-template-rows:auto auto;align-items:center;gap:0 7px;min-width:0;min-height:54px;border:0;border-radius:11px;background:transparent;color:var(--color-home-muted);text-align:left}.lesson-stepper button:not(:disabled):hover{background:var(--color-home-accent-soft)}.lesson-stepper button:disabled{opacity:.4}.lesson-stepper button>span{grid-row:1 / 3;display:grid;place-items:center;width:30px;height:30px;border-radius:10px;background:#edf2f8;font-size:11px;font-weight:700}.lesson-stepper b{overflow:hidden;font-size:10px;text-overflow:ellipsis;white-space:nowrap}.lesson-stepper small{font-size:8px}.lesson-stepper button.is-current{background:var(--color-home-accent-soft);color:var(--color-home-accent-hover)}.lesson-stepper button.is-current>span{background:var(--color-home-accent);color:#fff}.lesson-stepper button.is-complete>span{background:#e6f7ef;color:#16845a}.lesson-player{padding:28px;border:1px solid var(--color-home-line);border-radius:18px;background:#fff;box-shadow:0 12px 34px #18539a0f;animation:lesson-step-in .28s var(--ease-out) both}.lesson-step-heading>span{color:var(--color-home-accent-hover);font-size:10px;font-weight:700;letter-spacing:.07em;text-transform:uppercase}.lesson-step-heading h2{margin:6px 0 20px;font:700 27px/1.18 var(--font-display);letter-spacing:-.03em}.lesson-lede{display:grid;gap:14px}.lesson-lede>p{max-width:760px;margin:0;font-size:17px;line-height:1.65}.lesson-lede>p strong{color:var(--color-home-accent-hover)}.lesson-lede aside{display:flex;align-items:flex-start;gap:9px;padding:12px 14px;border-left:3px solid var(--color-home-accent);background:#f6fbff;color:var(--color-home-muted);font-size:12px;line-height:1.5}.lesson-lede aside svg{flex:0 0 auto;color:var(--color-home-accent-hover)}.measurement-examples{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:22px}.measurement-example{padding:17px;border:1px solid var(--color-home-line);border-radius:15px;background:#fbfdff}.measurement-example>span{color:var(--color-home-muted);font-size:10px;font-weight:700;text-transform:uppercase}.measurement-example>strong{display:block;margin:7px 0 13px;color:var(--color-home-accent-hover);font:700 29px var(--font-display)}.measurement-example--violet>strong{color:#7056cf}.measurement-example--green>strong{color:#16845a}.measurement-example>strong b{font-size:18px}.measurement-example dl{display:grid;gap:7px;margin:0}.measurement-example dl>div{display:grid;grid-template-columns:50px minmax(0,1fr)}.measurement-example dt{font-weight:700}.measurement-example dd{margin:0;color:var(--color-home-muted);font-size:11px}.micro-check,.numeric-check{margin-top:22px;padding:18px;border:1px solid var(--color-home-line);border-radius:15px;background:#fbfdff}.micro-check header>span{color:var(--color-home-accent-hover);font-size:9px;font-weight:700;text-transform:uppercase}.micro-check h3,.numeric-check h3{margin:4px 0 13px;font:700 15px/1.4 var(--font-display)}.choice-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:9px}.choice-button{position:relative;display:grid;grid-template-columns:28px minmax(0,1fr) 20px;align-items:center;gap:9px;min-height:50px;padding:8px 12px;border:1px solid var(--color-home-line);border-radius:11px;background:#fff;text-align:left;font-size:12px;font-weight:600;transition:border-color .16s,background .16s,transform .16s}.choice-button:hover{border-color:var(--color-home-line-strong);transform:translateY(-1px)}.choice-button>span{display:grid;place-items:center;width:27px;height:27px;border-radius:9px;background:#eef4fa}.choice-button.is-correct{border-color:#6bc69d;background:#effaf5;color:#126b49}.choice-button.is-incorrect{border-color:#e6a4a9;background:#fff5f5;color:#9b4149}.lesson-feedback{display:flex;align-items:flex-start;gap:9px;margin-top:12px;padding:11px 12px;border-radius:10px;font-size:12px;line-height:1.5}.lesson-feedback svg{flex:0 0 auto}.lesson-feedback p{margin:0}.lesson-feedback.is-correct{background:#eaf8f1;color:#126b49}.lesson-feedback.is-incorrect{background:#fff0f1;color:#91414a}.science-visual{margin:20px 0 0;padding:14px;border:1px solid var(--color-home-line);border-radius:16px;background:linear-gradient(180deg,#fafdff,#f5faff)}.science-visual svg{display:block;width:100%;max-height:330px}.science-visual figcaption{color:var(--color-home-muted);text-align:center;font-size:11px}.science-visual--cylinder svg{max-height:360px}.explain-show{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}.explain-show>div{display:grid;grid-template-columns:28px minmax(0,1fr);gap:9px;padding:12px;border-top:2px solid var(--color-home-line-strong)}.explain-show span{display:grid;place-items:center;width:27px;height:27px;border-radius:8px;background:var(--color-home-accent-soft);color:var(--color-home-accent-hover);font-size:11px;font-weight:700}.explain-show p{margin:0;color:var(--color-home-muted);font-size:11px;line-height:1.5}.numeric-check form{display:flex;align-items:end;gap:10px}.numeric-check label{display:grid;gap:5px;color:var(--color-home-muted);font-size:10px}.answer-input{display:flex;align-items:center;min-width:180px;height:46px;overflow:hidden;border:1px solid var(--color-home-line-strong);border-radius:10px;background:#fff}.answer-input input{min-width:0;width:100%;height:100%;border:0;outline:0;padding:0 12px;color:var(--color-home-ink);font-size:16px}.answer-input b{align-self:stretch;display:grid;place-items:center;min-width:53px;padding:0 10px;background:var(--color-home-accent-soft);color:var(--color-home-accent-hover);font-size:12px}.numeric-check form>button,.reveal-button,.quick-submit{min-height:46px;padding:0 16px;border:0;border-radius:10px;background:var(--color-home-ink);color:#fff;font-size:12px;font-weight:700}.numeric-check form>button:hover,.reveal-button:hover,.quick-submit:not(:disabled):hover{background:#183b6a}.multiples-intro{display:grid;grid-template-columns:minmax(250px,.8fr) minmax(0,1.2fr);align-items:center;gap:24px;padding:18px;border-radius:16px;background:#f6fbff}.paper-stack{width:100%}.multiples-intro>div>span{color:var(--color-home-accent-hover);font-size:10px;font-weight:700;text-transform:uppercase}.multiples-intro h3{margin:5px 0 8px;font:700 21px/1.25 var(--font-display)}.multiples-intro p{margin:0;color:var(--color-home-muted);font-size:13px;line-height:1.6}.calculation-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.numeric-check--compact{display:flex;flex-direction:column}.numeric-check--compact form{margin-top:auto}.worked-example>header{padding:18px;border-left:3px solid var(--color-home-accent);background:#f6fbff}.worked-example>header span{color:var(--color-home-accent-hover);font-size:9px;font-weight:700;text-transform:uppercase}.worked-example>header h3{margin:5px 0 7px;font:700 20px/1.35 var(--font-display)}.worked-example>header p{margin:0;color:var(--color-home-muted);line-height:1.6}.try-first{display:flex;align-items:flex-start;gap:10px;margin:16px 0;padding:13px;border-radius:12px;background:#fff7e7;color:#765710}.try-first p{margin:0;font-size:12px;line-height:1.5}.solution-stack{display:grid;gap:8px}.solution-step{display:grid;grid-template-columns:30px minmax(0,1fr);align-items:start;gap:10px;padding:12px;border-bottom:1px solid var(--color-home-line);animation:lesson-step-in .22s var(--ease-out) both}.solution-step>span{display:grid;place-items:center;width:28px;height:28px;border-radius:9px;background:var(--color-home-accent-soft);color:var(--color-home-accent-hover);font-weight:700}.solution-step p{margin:2px 0 0;font-size:13px;line-height:1.6}.reveal-button{margin-top:16px}.exam-tip{margin-top:16px;padding:14px;border-radius:12px;background:#fff7e7}.exam-tip p{margin:4px 0 0;color:#765710;font-size:12px}.quick-check>header{margin-bottom:14px;padding:12px 14px;border-left:3px solid var(--color-home-accent);background:#f6fbff}.quick-check>header p{margin:0;color:var(--color-home-muted);font-size:12px;line-height:1.55}.quick-question{position:relative;padding-left:40px}.quick-question__number{position:absolute;top:22px;left:0;display:grid;place-items:center;width:30px;height:30px;border-radius:10px;background:var(--color-home-accent);color:#fff;font-size:11px;font-weight:700}.quick-question .micro-check,.quick-question .numeric-check{margin-top:10px}.quick-submit{display:block;margin:18px 0 0 auto;background:var(--color-home-accent)}.quick-submit:disabled{opacity:.45}.quick-result{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-top:18px;padding:16px;border-radius:13px}.quick-result.is-pass{background:#eaf8f1;color:#126b49}.quick-result.is-retry{background:#fff7e7;color:#765710}.quick-result strong{font:700 25px var(--font-display)}.quick-result p{margin:3px 0 0;font-size:12px}.quick-result button{display:flex;align-items:center;gap:6px;min-height:42px;border:1px solid currentColor;border-radius:10px;background:transparent;color:inherit;font-weight:700}.module-completion{max-width:680px;margin-inline:auto;text-align:center}.completion-mark{display:grid;place-items:center;width:86px;height:86px;margin:4px auto 12px;border-radius:28px;background:#eaf8f1;color:#16845a}.module-completion>span{color:#16845a;font-size:11px;font-weight:700;text-transform:uppercase}.module-completion h2{margin:7px 0;font:700 30px/1.15 var(--font-display)}.module-completion>p{margin:0 auto 20px;color:var(--color-home-muted);line-height:1.65}.module-completion section{padding:16px;border:1px solid var(--color-home-line);border-radius:15px;text-align:left}.module-completion section h3{margin:0 0 10px;font:700 14px var(--font-display)}.module-completion section>div{display:grid;grid-template-columns:98px minmax(0,1fr);gap:12px;padding:9px 0;border-top:1px solid var(--color-home-line)}.module-completion section span{color:var(--color-home-accent-hover);font-size:10px;font-weight:700;white-space:nowrap}.module-completion section p{min-width:0;margin:0;color:var(--color-home-muted);font-size:11px;line-height:1.45}.module-completion aside{margin-top:14px;padding:13px;border-radius:12px;background:#f6fbff;text-align:left}.module-completion aside p{margin:4px 0 0;color:var(--color-home-muted);font-size:11px}.lesson-actions{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:26px;padding-top:18px;border-top:1px solid var(--color-home-line)}.lesson-actions>button{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:0 18px;border-radius:11px;font-size:12px;font-weight:700}.lesson-back{border:1px solid var(--color-home-line);background:#fff}.lesson-continue{border:1px solid var(--color-home-accent);background:var(--color-home-accent);color:#fff}.lesson-continue svg{transition:transform .16s}.lesson-continue:not(:disabled):hover svg{transform:translate(3px)}.lesson-actions>button:disabled{opacity:.42}.completion-actions{display:flex;align-items:center;gap:10px;margin-left:auto}.completion-actions :is(a,button){display:inline-flex;align-items:center;gap:7px;min-height:46px;padding:0 15px;border-radius:11px;text-decoration:none;font-size:12px;font-weight:700}.completion-actions a{border:1px solid var(--color-home-line);color:var(--color-home-ink)}.completion-actions button{border:1px solid var(--color-home-accent);background:var(--color-home-accent);color:#fff}.lesson-qa-controls{display:flex;flex-wrap:wrap;align-items:center;gap:7px;margin-top:18px;padding:10px;border:1px dashed #d8a500;border-radius:12px;background:#fff9df}.lesson-qa-controls>span{margin-right:3px;color:#805f00;font-size:10px;font-weight:800;letter-spacing:.06em}.lesson-qa-controls button{display:inline-flex;align-items:center;gap:5px;min-height:34px;padding:0 10px;border:1px solid #e5c75a;border-radius:8px;background:#fff;color:#594500;font-size:10px;font-weight:750}.lesson-qa-controls button:hover{border-color:#a98200;background:#fff4bd}.lesson-tutor{position:fixed;z-index:31;top:calc(var(--lesson-nav) + 22px);right:20px;width:300px;max-height:calc(100dvh - var(--lesson-nav) - 44px);padding:18px;overflow-y:auto;border:1px solid var(--color-home-line);border-radius:17px;background:#fff;box-shadow:0 14px 38px #18539a14}.tutor-context>span{display:flex;align-items:center;gap:6px;color:var(--color-home-accent-hover);font-size:9px;font-weight:700;text-transform:uppercase}.tutor-context h2{margin:7px 0;font:700 18px/1.3 var(--font-display)}.tutor-context p{margin:0;color:var(--color-home-muted);font-size:11px;line-height:1.55}.tutor-objectives,.tutor-tip,.tutor-coverage{margin-top:18px;padding-top:16px;border-top:1px solid var(--color-home-line)}.tutor-objectives h3,.tutor-coverage h3{margin:0 0 10px;font:700 12px var(--font-display)}.tutor-objectives>div{display:flex;align-items:flex-start;gap:8px;margin-top:9px;color:var(--color-home-muted);font-size:10px;line-height:1.45}.tutor-objectives>div svg{flex:0 0 auto;color:#91a4b7}.tutor-objectives>div.is-reached{color:var(--color-home-ink)}.tutor-objectives>div.is-reached svg{color:#16845a}.tutor-tip{display:flex;align-items:flex-start;gap:9px;padding:13px;border:0;border-radius:12px;background:#fff7e7;color:#765710}.tutor-tip svg{flex:0 0 auto}.tutor-tip p{margin:4px 0 0;font-size:10px;line-height:1.5}.tutor-coverage p{margin:0;color:var(--color-home-muted);font-size:10px;line-height:1.5}.tutor-coverage div{display:flex;gap:5px;margin-top:10px}.tutor-coverage span{padding:5px 7px;border-radius:8px;background:var(--color-home-accent-soft);color:var(--color-home-accent-hover);font-size:9px;font-weight:700}.ask-aqua{display:flex;align-items:center;gap:7px;width:100%;min-height:44px;margin-top:18px;padding:0 12px;border:1px solid var(--color-home-line);border-radius:11px;background:#f8fafc;color:var(--color-home-muted);font-size:11px;font-weight:700}.ask-aqua small{margin-left:auto;font-size:8px}.mobile-tutor-button,.lesson-scrim{display:none}.production-visual{overflow:hidden}.concept-compare,.official-example-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:20px}.concept-compare article,.official-example-list article{padding:18px;border:1px solid var(--color-home-line);border-radius:15px;background:#fbfdff}.concept-compare span{color:var(--color-home-accent-hover);font-size:10px;font-weight:800;letter-spacing:.08em}.concept-compare strong{display:block;margin:8px 0 5px;font:700 24px var(--font-display)}.concept-compare p,.official-example-list p{margin:0;color:var(--color-home-muted);font-size:12px;line-height:1.55}.official-example-list article:last-child{border-color:#dcd3fa;background:#faf8ff}.official-example-list strong{color:#7559dc}.classification-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.classification-grid .micro-check{margin-top:16px}.equation-strip{margin:16px 0 20px;padding:20px;border-radius:16px;background:#10264a;color:#fff;text-align:center}.equation-strip>strong{font:700 clamp(22px,3vw,32px) var(--font-display)}.equation-strip>div{display:flex;justify-content:center;gap:20px;margin-top:10px;color:#b9d7f5;font-size:10px;text-transform:uppercase}.interactive-controls{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:14px}.interactive-controls--three{grid-template-columns:repeat(3,minmax(0,1fr))}.interactive-controls label{display:grid;grid-template-columns:1fr auto;gap:9px;padding:13px 15px;border:1px solid var(--color-home-line);border-radius:13px;color:var(--color-home-muted);font-size:11px}.interactive-controls label b{color:var(--color-home-ink)}.interactive-controls input[type=range]{grid-column:1 / -1;width:100%;min-height:30px;accent-color:var(--color-home-accent)}.direction-visual{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:20px;margin-top:20px;padding:34px 24px;border-radius:16px;background:#f4f9ff}.direction-visual span{color:var(--color-home-accent-hover);font-weight:800}.direction-visual span:last-child{text-align:right}.direction-visual i{display:grid;place-items:center;width:68px;height:68px;border-radius:24px;background:#5db7ff;color:#10264a;font-size:11px;font-style:normal;font-weight:800}.journey-timeline{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:14px;margin:18px 0}.journey-timeline article{display:grid;place-items:center;min-height:100px;border:1px solid var(--color-home-line);border-radius:15px;background:#f8fbff}.journey-timeline article b{font-size:24px}.journey-timeline article span{color:var(--color-home-muted)}.journey-timeline>i{color:var(--color-home-muted);font-style:normal}.journey-timeline>strong{grid-column:1 / -1;text-align:center;color:var(--color-home-accent-hover)}.live-result{margin-top:14px;padding:18px;border-radius:14px;background:#edf8f3;color:#136f4c;text-align:center}.live-result.is-negative{background:#fff2f2;color:#a1444e}.live-result span{display:block;font-size:10px;text-transform:uppercase}.live-result strong{display:block;margin:4px;font-size:28px}.live-result p{margin:0;font-size:12px}.vacuum-visual{position:relative;display:grid;grid-template-columns:1fr 1fr;gap:30px;min-height:270px;margin-top:18px;padding:25px 70px;overflow:hidden;border:1px solid var(--color-home-line);border-radius:16px;background:linear-gradient(#f7fbff,#e8f3ff)}.vacuum-visual article{display:grid;grid-template-rows:auto 1fr;justify-items:center;color:var(--color-home-muted)}.vacuum-visual i{align-self:end;color:#2779e8;font-size:64px;font-style:normal;animation:vacuum-fall 2.4s ease-in-out infinite}.vacuum-visual strong{position:absolute;right:0;bottom:20px;left:0;text-align:center}.vacuum-visual:after{content:"";position:absolute;right:40px;bottom:54px;left:40px;height:3px;background:#8fa7c0}.segmented-control{display:flex;justify-content:center;gap:7px;margin-top:18px}.segmented-control button{min-height:44px;padding:0 20px;border:1px solid var(--color-home-line);border-radius:var(--radius-pill);background:#fff;color:var(--color-home-muted);font-weight:700}.segmented-control button[aria-pressed=true]{border-color:var(--color-home-accent);background:var(--color-home-accent-soft);color:var(--color-home-accent-hover)}.method-flow{display:grid;grid-template-columns:1fr auto 1fr auto 1fr;align-items:center;gap:10px;margin-top:20px}.method-flow article{min-height:120px;padding:16px;border:1px solid var(--color-home-line);border-radius:15px;background:#f8fbff;text-align:center}.method-flow article span{display:grid;place-items:center;width:28px;height:28px;margin:0 auto 9px;border-radius:9px;background:var(--color-home-accent-soft);color:var(--color-home-accent-hover);font-weight:800}.method-flow article strong{font-size:13px}.method-flow article p{margin:5px 0 0;color:var(--color-home-muted);font-size:10px}.method-flow>i{color:var(--color-home-accent-hover);font-style:normal;font-weight:800}.completion-next{border-color:var(--color-home-accent)!important;background:var(--color-home-accent);color:#fff!important}.lesson-feedback>div{min-width:0}.lesson-feedback>div>p{margin:0}.hint-ladder{display:grid;gap:7px;margin-top:9px}.hint-ladder p{margin:0;padding-top:7px;border-top:1px solid currentColor;font-size:11px;line-height:1.5}.hint-ladder button{justify-self:start;min-height:34px;padding:0 10px;border:1px solid currentColor;border-radius:8px;background:transparent;color:inherit;font-size:10px;font-weight:700}.measurement-comparison,.hook-comparison{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:18px}.measurement-comparison article,.hook-comparison article{padding:20px;border:1px solid var(--color-home-line);border-radius:15px;background:#fff}.measurement-comparison span,.hook-comparison span{color:var(--color-home-accent-hover);font-size:10px;font-weight:800;text-transform:uppercase}.measurement-comparison strong,.hook-comparison strong{display:block;margin:9px 0 6px;font:700 21px var(--font-display)}.measurement-comparison p,.hook-comparison p{margin:0;color:var(--color-home-muted);font-size:11px;line-height:1.5}.hook-comparison article:last-child{background:#f6f2ff}.hook-comparison b{display:block;margin-top:10px;color:var(--color-home-accent-hover);font-size:12px}.hook-comparison--blocks article{text-align:center}.hook-comparison--blocks i{display:block;width:78px;height:78px;margin:14px auto;border-radius:8px;background:#b88452;box-shadow:inset -10px -10px #00000014}.hook-comparison--blocks article:last-child i{background:#9eb1c1}.concept-callout{display:grid;grid-template-columns:auto minmax(0,1fr);gap:6px 14px;margin-top:14px;padding:15px;border-left:3px solid var(--color-home-accent);background:var(--color-home-accent-soft)}.concept-callout strong{color:var(--color-home-accent-hover);font-size:11px}.concept-callout span{color:var(--color-home-muted);font-size:11px;line-height:1.5}.concept-summary,.module-summary{max-width:720px;margin-inline:auto}.concept-summary>span,.module-summary>span{color:var(--color-home-accent-hover);font-size:10px;font-weight:800;letter-spacing:.06em;text-transform:uppercase}.concept-summary h3,.module-summary h3{margin:7px 0 18px;font:700 25px/1.2 var(--font-display)}.concept-summary ul,.module-summary ul{display:grid;gap:9px;margin:0;padding:0;list-style:none}.concept-summary li,.module-summary li{display:grid;grid-template-columns:minmax(130px,.45fr) minmax(0,1fr);gap:14px;padding:14px;border:1px solid var(--color-home-line);border-radius:12px;background:#fff}.concept-summary li span,.module-summary li p{margin:0;color:var(--color-home-muted);font-size:11px;line-height:1.5}.module-summary.is-concept-summary li{border-left:3px solid var(--color-home-accent)}.save-note{margin:15px 0 0;padding:13px;border-radius:11px;background:#f6fbff;color:var(--color-home-muted);font-size:11px;line-height:1.5}.graph-pattern-summary{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;margin-top:12px}.graph-pattern-summary span{padding:10px;border-radius:9px;background:var(--color-home-accent-soft);color:var(--color-home-accent-hover);text-align:center;font-size:10px;font-weight:700}.motion-shape-atlas{margin-top:20px;padding:18px;border:1px solid var(--color-home-line);border-radius:16px;background:linear-gradient(180deg,#fafdff,#f5faff)}.motion-shape-atlas>header>span{color:var(--color-home-accent-hover);font-size:10px;font-weight:800;letter-spacing:.08em;text-transform:uppercase}.motion-shape-atlas h3{margin:4px 0 0;color:var(--color-home-ink);font:700 20px/1.2 var(--font-display)}.motion-shape-atlas__columns{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;margin-top:18px}.motion-shape-atlas__columns>section{padding:14px;border:1px solid var(--color-home-line);border-radius:13px;background:#fff}.motion-shape-atlas__columns>section>header h4{margin:0;color:var(--color-home-ink);font-size:14px}.motion-shape-atlas__columns>section>header p{margin:4px 0 12px;color:var(--color-home-muted);font-size:11px;line-height:1.5}.motion-shape-atlas__columns>section>div{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.motion-shape-card{min-width:0;margin:0;padding:8px;border:1px solid #e2ebf5;border-radius:10px;background:#fbfdff}.motion-shape-card svg{display:block;width:100%;height:auto}.motion-shape-card figcaption{display:grid;gap:3px;margin-top:3px;color:var(--color-home-muted);font-size:10px;line-height:1.4}.motion-shape-card figcaption strong{color:var(--color-home-ink);font-size:11px}.motion-shape-atlas__note{margin:16px 0 0;padding:11px 12px;border-radius:10px;background:var(--color-home-accent-soft);color:var(--color-home-ink);font-size:11px;line-height:1.55}.motion-shape-atlas__note em{color:var(--color-home-accent-hover);font-style:normal;font-weight:800}.motion-map{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(220px,.8fr);gap:16px;margin-top:18px}.motion-map__road{position:relative;min-height:230px;overflow:hidden;border-radius:15px;background:linear-gradient(#dff1ff 0 55%,#8397a8 55% 100%)}.motion-map__road:before{content:"";position:absolute;right:0;bottom:42px;left:0;border-top:3px dashed #fff}.motion-map__road span{position:absolute;z-index:1;bottom:62px;width:76px;margin-left:-38px;padding:13px 5px;border-radius:14px 14px 8px 8px;background:var(--color-home-accent);color:#fff;text-align:center;font-size:10px;font-weight:800;transition:left .5s var(--ease-out)}.motion-map__graph{min-height:230px;margin:0;overflow:hidden;border:1px solid var(--color-home-line);border-radius:15px;background:#fff}.motion-map__graph svg{display:block;width:100%;height:230px}.motion-map__graph line{stroke:#8aa0b5;stroke-width:2;vector-effect:non-scaling-stroke}.motion-map__graph path{fill:none;stroke:var(--color-home-accent);stroke-width:5;stroke-linecap:round;stroke-linejoin:round;vector-effect:non-scaling-stroke}.motion-map__graph text{fill:var(--color-home-muted);font-size:12px;font-weight:700}.solution-step small{display:block;margin-bottom:4px;color:var(--color-home-accent-hover);font-size:9px;letter-spacing:.05em}@keyframes vacuum-fall{0%{transform:translateY(-85px)}70%,to{transform:translateY(0)}}@keyframes lesson-step-in{0%{opacity:0;transform:translateY(8px)}}@media(max-width:1240px){.lesson-sidebar{transform:translate(-105%);transition:transform .26s var(--ease-out)}.lesson-sidebar.is-open{z-index:82;transform:translate(0)}.lesson-sidebar .panel-close{position:absolute;top:12px;right:12px;display:grid;place-items:center;width:42px;height:42px;border:0;border-radius:10px;background:var(--color-home-accent-soft)}.lesson-menu{display:grid;place-items:center;width:42px;height:42px;border:1px solid var(--color-home-line);border-radius:11px;background:#fff}.lesson-topbar{grid-template-columns:auto auto auto minmax(0,1fr) auto;gap:12px}.lesson-main{width:min(850px,calc(100% - 354px));margin:0 330px 0 24px}}@media(max-width:980px){.lesson-page{--lesson-nav: 116px}.lesson-topbar{grid-template-columns:auto auto auto 1fr;height:var(--lesson-nav);padding-inline:16px}.lesson-topbar nav{order:6;grid-column:1 / -1;justify-self:stretch;height:48px;justify-content:space-around;border-top:1px solid var(--color-home-line)}.lesson-user-actions{grid-column:4}.lesson-streak{display:none}.lesson-main{width:min(100% - 36px,850px);margin-inline:auto}.lesson-tutor{inset:auto 0 0;z-index:83;width:100%;max-height:82dvh;border-radius:22px 22px 0 0;transform:translateY(105%);opacity:0;transition:transform .28s var(--ease-out),opacity .18s}.lesson-tutor.is-open{transform:translateY(0);opacity:1}.lesson-tutor .panel-close{position:sticky;z-index:2;top:0;float:right;display:grid;place-items:center;width:44px;height:44px;border:0;border-radius:11px;background:var(--color-home-accent-soft)}.mobile-tutor-button{position:fixed;z-index:50;right:16px;bottom:16px;display:flex;align-items:center;gap:7px;min-height:48px;padding:0 14px;border:1px solid var(--color-home-line-strong);border-radius:var(--radius-pill);background:#fff;color:var(--color-home-accent-hover);box-shadow:0 12px 30px #18539a29;font-weight:700}.lesson-scrim{position:fixed;z-index:80;inset:0;display:block;border:0;background:#0a1e3a52}.lesson-stepper{overflow-x:auto;grid-template-columns:none;grid-auto-flow:column;grid-auto-columns:112px}.lesson-stepper button{scroll-snap-align:start}}@media(max-width:680px){.lesson-topbar{grid-template-columns:auto auto 1fr auto}.lesson-topbar .syllabus-brand span{display:none}.lesson-topbar .syllabus-course{font-size:11px}.lesson-user-actions>button:first-of-type{display:none}.lesson-main{width:calc(100% - 24px);padding-top:22px}.lesson-heading{grid-template-columns:minmax(0,1fr) 66px}.lesson-heading__aqua{width:62px}.lesson-heading h1{font-size:27px}.lesson-heading__copy p{font-size:13px}.lesson-player{padding:20px 16px}.lesson-step-heading h2{font-size:24px}.lesson-lede>p{font-size:16px}.measurement-examples,.choice-grid,.explain-show,.calculation-grid,.concept-compare,.official-example-list,.classification-grid,.interactive-controls,.interactive-controls--three,.measurement-comparison,.hook-comparison,.motion-map,.graph-pattern-summary,.motion-shape-atlas__columns{grid-template-columns:1fr}.motion-shape-atlas__columns>section>div{grid-template-columns:repeat(2,minmax(0,1fr))}.measurement-example{display:grid;grid-template-columns:1fr auto;align-items:center}.measurement-example>strong{margin:0}.measurement-example dl{grid-column:1 / -1;margin-top:10px}.concept-summary li,.module-summary li{grid-template-columns:1fr;gap:5px}.direction-visual{gap:8px;padding-inline:10px}.direction-visual span{font-size:11px}.direction-visual i{width:54px;height:54px}.journey-timeline{grid-template-columns:1fr}.journey-timeline>strong{grid-column:1}.method-flow{grid-template-columns:1fr}.method-flow>i{transform:rotate(90deg);text-align:center}.vacuum-visual{padding-inline:24px}.numeric-check form{align-items:stretch;flex-direction:column}.answer-input{min-width:0;width:100%}.numeric-check form>button{width:100%}.multiples-intro{grid-template-columns:1fr}.paper-stack{max-height:170px}.lesson-actions{align-items:stretch}.lesson-actions>button{min-width:104px}.completion-actions{flex-direction:column;align-items:stretch;width:100%}.completion-actions :is(a,button){justify-content:center}.lesson-actions:has(.completion-actions){flex-direction:column}}.aqua-flow-visual{display:flex;align-items:stretch;justify-content:center;flex-wrap:wrap;gap:10px;max-width:760px;margin:22px auto;padding:24px;border:1px solid var(--color-home-line);border-radius:18px;background:linear-gradient(135deg,#f8fcff,#edf7ff)}.aqua-flow-visual span{display:grid;place-items:center;min-width:105px;max-width:155px;padding:13px;border:1px solid #cfe2f5;border-radius:12px;background:#fff;color:#17395d;font-size:12px;font-weight:800;line-height:1.35;text-align:center}.aqua-flow-visual i{align-self:center;color:var(--color-home-accent);font-size:24px;font-style:normal;font-weight:800}.unit-teaching{display:grid;gap:18px}.unit-teaching__lede{max-width:800px;margin:0;font-size:17px;line-height:1.72}.unit-formula{padding:18px 22px;border-radius:16px;background:#10264a;color:#fff;font:700 clamp(20px,3vw,30px) var(--font-display);text-align:center}.unit-misconception{display:grid;grid-template-columns:auto 1fr;gap:10px 14px;padding:16px 18px;border-left:4px solid #f3bb57;background:#fffbf1;color:var(--color-home-muted)}.unit-misconception strong{color:#8a641c}.unit-misconception p{margin:0;line-height:1.6}.unit-svg,.mini-graph{display:block;width:100%;max-height:390px;border:1px solid var(--color-home-line);border-radius:18px;background:#fbfdff}.unit-tabs{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:12px}.unit-tabs button{padding:9px 15px;border:1px solid var(--color-home-line);border-radius:999px;background:#fff;color:var(--color-home-muted);font-weight:750;text-transform:capitalize;cursor:pointer;transition:transform .18s,border-color .18s,background .18s}.unit-tabs button:hover{transform:translateY(-1px);border-color:#55b6ff}.unit-tabs button.is-active{border-color:#2779e8;background:#eaf6ff;color:#155db4}.unit-flow{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:8px;padding:22px;border:1px solid var(--color-home-line);border-radius:18px;background:#f7fbff}.unit-flow span{display:flex;align-items:center;gap:8px;padding:10px 13px;border-radius:11px;background:#fff;box-shadow:0 5px 18px #10264a0c;color:#173c6a;font-weight:750}.unit-flow i{color:#55b6ff;font-style:normal}.particle-comparison,.motion-lab,.collision-lab,.brownian-lab,.gas-condition-lab,.temperature-scales,.temperature-converter,.formula-meaning,.boyle-graph,.particle-property-links,.controlled-comparison,.gas-rule-table,.terminology-compare,.core-map,.tier-banner{padding:18px;border:1px solid var(--color-home-line);border-radius:18px;background:linear-gradient(180deg,#fbfdff,#f2f9ff)}.particle-comparison header span,.tier-banner>span{color:#2779e8;font-size:10px;font-weight:800;letter-spacing:.08em}.particle-comparison h3,.tier-banner h3,.formula-meaning h3{margin:5px 0 6px;font:700 21px/1.2 var(--font-display);color:var(--color-home-ink)}.particle-comparison header p,.tier-banner p{margin:0;color:var(--color-home-muted);font-size:12px;line-height:1.55}.particle-table{margin-top:16px;overflow-x:auto;border:1px solid #d7e5f2;border-radius:12px;background:#fff}.particle-table__head,.particle-table__row{display:grid;grid-template-columns:1.05fr 1.1fr 1.1fr 1.7fr 1.2fr;min-width:700px}.particle-table__head{padding:11px 12px;background:#eaf5ff;color:#155db4;font-size:10px;text-transform:uppercase;letter-spacing:.05em}.particle-table__row{align-items:center;border-top:1px solid #e7eef5;color:var(--color-home-muted);font-size:11px;line-height:1.4}.particle-table__row>span,.particle-table__state{padding:11px 12px}.particle-table__state{display:flex;align-items:center;gap:8px;color:var(--color-home-ink);text-transform:capitalize}.particle-table__state .mini-particles{flex:none;width:54px;height:38px}.particle-table__state .mini-particles span{width:7px;height:7px}.particle-table__state .mini-particles span:nth-child(4n+1){left:12%;top:20%}.particle-table__state .mini-particles span:nth-child(4n+2){left:42%;top:20%}.particle-table__state .mini-particles span:nth-child(4n+3){left:70%;top:20%}.particle-table__state .mini-particles span:nth-child(4n){left:27%;top:60%}.particle-property-links,.controlled-comparison,.terminology-compare{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.particle-property-links article,.controlled-comparison article,.terminology-compare article{padding:15px;border:1px solid #dbe8f4;border-radius:13px;background:#fff}.particle-property-links strong,.controlled-comparison strong,.terminology-compare strong{display:block;margin:8px 0 4px;color:var(--color-home-ink)}.particle-property-links p,.controlled-comparison p,.terminology-compare p{margin:0;color:var(--color-home-muted);font-size:11px;line-height:1.5}.particle-focus-label{display:flex;align-items:baseline;gap:12px;margin-bottom:10px}.particle-focus-label span{color:#2779e8;font-weight:800;text-transform:uppercase}.particle-focus-label p{margin:0;color:var(--color-home-muted);font-size:12px}.lesson-roadmap{display:grid;grid-template-columns:1fr auto 1fr auto 1fr;align-items:center;gap:10px;padding:20px;border:1px solid var(--color-home-line);border-radius:18px;background:#f7fbff}.lesson-roadmap article{display:grid;gap:3px;padding:14px;border-radius:13px;background:#fff;text-align:center}.lesson-roadmap b{color:#2779e8;font-size:18px}.lesson-roadmap strong{color:var(--color-home-ink)}.lesson-roadmap span{color:var(--color-home-muted);font-size:11px}.lesson-roadmap>i{color:#55b6ff;font-size:22px;font-style:normal}.motion-lab__box{position:relative;height:230px;overflow:hidden;border:2px solid #9bb3cb;border-radius:16px;background:#eef8ff}.motion-lab__box i,.gas-condition-lab .gas-vessel i{position:absolute;width:15px;height:15px;border-radius:50%;background:#2779e8;animation:particle-gas 1s linear infinite alternate}.collision-svg .collision-particle{animation:collision-travel 1.2s linear infinite alternate}.brownian-lab svg{max-height:340px}.brownian-notes{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin-top:10px}.brownian-notes article{padding:12px;border-radius:11px;background:#fff}.brownian-notes b{display:block;color:#2779e8;font-size:9px;letter-spacing:.08em}.brownian-notes strong{display:block;margin-top:5px;color:var(--color-home-ink);font-size:12px}.terminology-compare{grid-template-columns:1fr auto 1fr;align-items:center}.terminology-compare>i{color:#55b6ff;font-size:20px;font-style:normal}.terminology-compare__speck>span{display:block;width:42px;height:42px;margin:auto;border-radius:50%;background:#10264a;box-shadow:0 0 0 10px #dceeff}.condition-badge{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:12px}.condition-badge span{padding:7px 10px;border-radius:999px;background:#eaf5ff;color:#155db4;font-size:10px;font-weight:800}.gas-condition-lab .gas-vessel{margin-bottom:14px}.gas-rule-table{padding:0;overflow-x:auto;background:#fff}.gas-rule-table>div{display:grid;grid-template-columns:1.2fr 1.2fr 2fr .7fr;min-width:580px}.gas-rule-table>div>*{padding:12px;border-right:1px solid #e2edf6;border-bottom:1px solid #e2edf6;font-size:11px}.gas-rule-table>div:first-child{background:#eaf5ff;color:#155db4;text-transform:uppercase;font-weight:800}.gas-rule-table strong{text-align:center;color:#2779e8}.core-map>p{margin:12px 0 0;color:#8a641c;font-size:11px}.temperature-scales header,.temperature-scales>div{display:grid;grid-template-columns:1fr 18px 1fr;gap:12px;align-items:center}.temperature-scales header{margin-bottom:8px;color:#155db4;font-size:11px}.temperature-scales>div{position:relative;padding:9px 0;border-bottom:1px dashed #cfdeeb;color:var(--color-home-muted);font-size:11px}.temperature-scales>div i{height:2px;background:#55b6ff}.temperature-scales>div.is-zero{color:#b84b59;font-weight:800}.temperature-scales>div strong{position:absolute;right:0;top:8px;color:#b84b59;font-size:10px}.temperature-scales p{margin:14px 0 0;color:var(--color-home-muted);font-size:11px;line-height:1.5}.temperature-converter{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:14px}.temperature-converter>div{padding:18px;border-radius:13px;background:#fff;text-align:center}.temperature-converter span{display:block;color:#2779e8;font-size:10px;font-weight:800;text-transform:uppercase}.temperature-converter strong{display:block;margin-top:6px;font:700 24px var(--font-display);color:var(--color-home-ink)}.temperature-converter>i{color:#2779e8;font-size:20px;font-style:normal;font-weight:800}.temperature-converter input,.temperature-converter p{grid-column:1/-1}.temperature-converter p{margin:0;color:var(--color-home-muted);font-size:11px}.formula-meaning{text-align:center}.formula-meaning h3{padding:16px;border-radius:13px;background:#10264a;color:#fff;font-size:28px}.formula-meaning>div{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.formula-meaning>div span{padding:10px;border-radius:10px;background:#fff;color:var(--color-home-muted);font-size:11px}.formula-meaning>div b{display:block;color:#2779e8}.formula-meaning p{margin:12px 0 0;color:var(--color-home-muted);font-size:11px}.boyle-graph p{margin-bottom:0}.particle-box{position:relative;height:280px;overflow:hidden;border:2px solid #9bb3cb;border-radius:18px;background:linear-gradient(#fbfdff,#eaf6ff)}.particle-box i,.mini-particles span{position:absolute;width:18px;height:18px;border-radius:50%;background:#2779e8;box-shadow:inset -3px -3px #155db444}.particle-box.is-solid{display:grid;grid-template-columns:repeat(5,18px);place-content:center;gap:20px}.particle-box.is-solid i{position:static;animation:particle-vibrate .4s ease-in-out infinite alternate}.particle-box.is-liquid i{left:calc(10% + (var(--i) % 5)*18%);top:calc(48% + ((var(--i)/5) - (var(--i)/5)%1)*9%);animation:particle-liquid 1.3s ease-in-out infinite alternate}.particle-box.is-gas i{left:calc(7% + (var(--i) % 4)*27%);top:calc(9% + ((var(--i)/4) - (var(--i)/4)%1)*34%);animation:particle-gas 1s linear infinite alternate}.unit-facts{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin-top:12px}.unit-facts span{padding:13px;border-radius:12px;background:#f2f8fd;color:var(--color-home-muted);font-size:12px}.unit-facts b{display:block;margin-bottom:4px;color:#155db4;text-transform:uppercase;font-size:9px;letter-spacing:.08em}.state-path{display:grid;grid-template-columns:1fr auto 1fr auto 1fr;align-items:center;gap:10px}.state-path article{display:grid;gap:8px;text-align:center}.state-path>i{display:grid;gap:5px;color:#55b6ff;font-size:26px;font-style:normal;text-align:center}.state-path>i b{color:#526a86;font-size:10px;text-transform:uppercase}.mini-particles{position:relative;height:120px;border:1px solid var(--color-home-line);border-radius:14px;background:#fbfdff}.mini-particles span{width:12px;height:12px}.mini-particles span:nth-child(4n+1){left:18%;top:25%}.mini-particles span:nth-child(4n+2){left:42%;top:25%}.mini-particles span:nth-child(4n+3){left:66%;top:25%}.mini-particles span:nth-child(4n){left:30%;top:60%}.mini-particles.is-liquid span:nth-child(n){top:auto;bottom:15%}.mini-particles.is-gas span:nth-child(2n){top:18%;bottom:auto}.mini-particles.is-gas span:nth-child(3n){left:72%;top:64%;bottom:auto}.gas-vessel{position:relative;min-width:45%;height:250px;margin:auto;overflow:hidden;border:4px solid #526a86;border-top-color:#9bb3cb;background:#eef8ff;transition:width .3s}.gas-vessel>div i{position:absolute;left:calc(6% + (var(--i) % 5)*20%);top:calc(8% + ((var(--i)/5) - (var(--i)/5)%1)*35%);width:14px;height:14px;border-radius:50%;background:#2779e8;animation:particle-gas var(--speed) linear infinite alternate}.gas-vessel>b{position:absolute;right:12px;bottom:10px;padding:7px 10px;border-radius:9px;background:#10264a;color:#fff}.mini-graph{max-width:460px;margin:18px auto 0}.heating-compare,.radiation-lab{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.heating-compare article,.radiation-lab{padding:18px;border:1px solid var(--color-home-line);border-radius:16px;background:#fbfdff}.heating-compare span{color:#2779e8;text-transform:uppercase;font-size:10px;font-weight:800}.heating-compare strong{display:block;margin:8px 0;font:750 28px var(--font-display)}.heating-compare p,.radiation-lab p{margin:0;color:var(--color-home-muted)}.evaporation-scene{position:relative;height:240px;overflow:hidden;border-radius:18px;background:linear-gradient(#eef9ff 0 45%,#61c2ed 46%)}.liquid-surface i{position:relative;display:inline-block;top:150px;margin:8px;width:13px;height:13px;border-radius:50%;background:#eafaff}.evaporation-scene>span{position:absolute;bottom:45%;color:#2779e8;font-size:30px;animation:evaporate 1.4s ease-out infinite}.conduction-svg .is-hot{animation:particle-vibrate .24s ease-in-out infinite alternate}.conduction-svg .electron{animation:electron-flow 1.4s linear infinite}.convection-svg path{animation:current-pulse 1.5s ease-in-out infinite}.radiation-object{position:relative;width:160px;height:160px;border-radius:24px;background:#1c2633}.radiation-object.is-shiny{border:3px solid #9fb0c4;background:linear-gradient(135deg,#fff,#dbe4ee,#fff)}.radiation-object i{position:absolute;left:80px;top:80px;width:calc(45px + var(--i)*8px);height:calc(45px + var(--i)*8px);border:2px solid #ef635d;border-radius:50%;transform:translate(-50%,-50%);animation:radiate 1.8s ease-out infinite;animation-delay:calc(var(--i)*.15s)}.radiation-lab{align-items:center}.visual-note{padding:12px;border-radius:12px;background:#eef8ff;color:#155db4;text-align:center;font-weight:750}.wave-svg polyline{stroke-dasharray:12 4;animation:wave-dash 2s linear infinite}.wave-particle{animation:wave-particle 1s ease-in-out infinite alternate}.longitudinal-strip{position:relative;height:125px;margin-top:14px;overflow:hidden;border:1px solid var(--color-home-line);border-radius:16px;background:#fbfdff}.longitudinal-strip i{position:absolute;top:44px;width:6px;height:36px;border-radius:3px;background:#2779e8;animation:longitudinal 1.2s ease-in-out infinite alternate}.longitudinal-strip span{position:relative;top:15px;margin-left:18%;color:#b84b59;font-size:10px;font-weight:800;text-transform:uppercase}.longitudinal-strip b{position:absolute;left:22px;bottom:10px;color:#526a86;font-size:11px}.spectrum-bar{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));overflow:hidden;border-radius:15px}.spectrum-bar button{min-height:90px;padding:8px 4px;border:0;background:var(--band);color:#fff;font-size:10px;font-weight:800;cursor:pointer;opacity:.72;transition:opacity .2s,transform .2s}.spectrum-bar button:hover,.spectrum-bar button.is-active{opacity:1;transform:translateY(-3px)}.spectrum-direction{display:flex;justify-content:space-between;padding:8px 2px;color:#526a86;font-size:10px;font-weight:750}.spectrum-detail{padding:18px;border:1px solid var(--color-home-line);border-radius:14px;background:#fbfdff}.spectrum-detail strong{color:#2779e8;text-transform:uppercase}.spectrum-detail p{margin:6px 0 0}.visible-colours{display:grid;grid-template-columns:repeat(7,1fr);height:25px;margin-top:12px;overflow:hidden;border-radius:999px}.visible-colours i{display:block}@keyframes particle-vibrate{to{transform:translate(3px,-2px)}}@keyframes particle-liquid{to{transform:translate(13px,-8px)}}@keyframes particle-gas{to{transform:translate(34px,24px)}}@keyframes collision-travel{to{transform:translate(25px,12px)}}@keyframes evaporate{0%{transform:translateY(0);opacity:1}to{transform:translateY(-80px);opacity:0}}@keyframes electron-flow{to{transform:translate(60px)}}@keyframes current-pulse{50%{opacity:.45}}@keyframes radiate{0%{transform:translate(-50%,-50%) scale(.25);opacity:.8}to{transform:translate(-50%,-50%) scale(1.15);opacity:0}}@keyframes wave-particle{to{transform:translateY(-22px)}}@keyframes longitudinal{to{transform:translate(8px)}}@keyframes wave-dash{to{stroke-dashoffset:-30}}@media(max-width:680px){.unit-facts,.heating-compare,.radiation-lab,.particle-property-links,.controlled-comparison,.terminology-compare,.formula-meaning>div,.brownian-notes{grid-template-columns:1fr}.lesson-roadmap{grid-template-columns:1fr}.lesson-roadmap>i,.terminology-compare>i{transform:rotate(90deg);justify-self:center}.state-path{grid-template-columns:1fr}.state-path>i{transform:rotate(90deg)}.spectrum-bar{grid-template-columns:repeat(4,1fr)}.unit-teaching__lede{font-size:15px}.unit-svg{min-height:220px}.unit-flow{justify-content:flex-start}.unit-misconception,.temperature-converter{grid-template-columns:1fr}.temperature-converter>i{transform:rotate(90deg);justify-self:center}.temperature-scales>div strong{position:static;grid-column:1/-1}.particle-focus-label{display:block}.particle-focus-label p{margin-top:4px}}@media(prefers-reduced-motion:reduce){.lesson-player{animation:none}.lesson-progress i,.lesson-sidebar,.lesson-tutor{transition:none}.lesson-heading__aqua .aqua-mascot,.vacuum-visual i{animation:none}}.lesson-summary-save{display:inline-flex;align-items:center;gap:7px;min-height:38px;margin-top:9px;padding:0 12px;border:1px solid var(--color-home-line);border-radius:10px;background:#fff;color:var(--color-home-accent-hover);font-size:11px;font-weight:700}.lesson-summary-save:hover{border-color:var(--color-home-line-strong);background:var(--color-home-accent-soft)}.chapter-complete-prompt{position:fixed;z-index:120;inset:0;display:grid;place-items:center;padding:22px;background:#0d264647;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.chapter-complete-prompt__card{position:relative;display:grid;justify-items:center;width:min(440px,100%);padding:28px;border:1px solid var(--color-home-line);border-radius:20px;background:#fff;box-shadow:0 22px 70px #103b7033;text-align:center}.chapter-complete-prompt__card .aqua-mascot{width:76px;margin-bottom:8px}.chapter-complete-prompt__card>span{color:var(--color-home-accent-hover);font-size:10px;font-weight:800;letter-spacing:.06em;text-transform:uppercase}.chapter-complete-prompt__card h2{margin:7px 0 5px;font:700 24px/1.2 var(--font-display)}.chapter-complete-prompt__card p{max-width:320px;margin:0;color:var(--color-home-muted);font-size:12px;line-height:1.55}.chapter-complete-prompt__card>div{display:grid;width:100%;gap:7px;margin-top:19px}.chapter-complete-prompt__card a{display:flex;align-items:center;justify-content:space-between;min-height:43px;padding:0 12px;border:1px solid var(--color-home-line);border-radius:10px;color:var(--color-home-accent-hover);text-decoration:none;font-size:11px;font-weight:700}.chapter-complete-prompt__card a:hover{border-color:var(--color-home-line-strong);background:var(--color-home-accent-soft)}.chapter-complete-prompt__close{position:absolute;top:10px;right:10px;display:grid;place-items:center;width:36px;height:36px;border:0;border-radius:9px;background:transparent;color:var(--color-home-muted)}.chapter-complete-prompt__close:hover{background:var(--color-home-accent-soft)}.chapter-page{min-height:100dvh;background:#fafdff;color:var(--color-home-ink)}.chapter-page :is(a,button):focus-visible{outline:3px solid var(--color-home-focus);outline-offset:3px}.chapter-topbar{display:flex;align-items:center;justify-content:space-between;min-height:66px;padding:0 max(24px,calc((100% - 1040px)/2));border-bottom:1px solid var(--color-home-line);background:#fffffff5}.chapter-topbar a{display:inline-flex;align-items:center;gap:7px;color:var(--color-home-ink);text-decoration:none;font-size:12px;font-weight:700}.chapter-topbar>span{color:var(--color-home-muted);font-size:11px}.chapter-page main{width:min(1040px,calc(100% - 40px));margin:0 auto;padding:48px 0 80px}.chapter-intro{display:grid;grid-template-columns:minmax(0,1fr) 310px;align-items:end;gap:60px;padding-bottom:34px;border-bottom:1px solid var(--color-home-line)}.chapter-intro>div>span,.chapter-map header span{color:var(--color-home-accent-hover);font-size:11px;font-weight:800;letter-spacing:.06em;text-transform:uppercase}.chapter-intro h1{margin:8px 0 10px;font:700 clamp(42px,7vw,76px)/.98 var(--font-display)}.chapter-intro>div>p{margin:0;color:var(--color-home-muted);font-size:clamp(18px,2.4vw,26px);line-height:1.35}.chapter-intro aside{display:grid;grid-template-columns:72px 1fr;align-items:center;gap:15px;padding:15px;border:1px solid var(--color-home-line);border-radius:17px;background:#fff}.chapter-intro aside p{margin:0;color:var(--color-home-muted);font-size:12px;line-height:1.55}.chapter-intro .aqua-mascot{width:70px}.chapter-map{margin-top:30px;padding:24px;border:1px solid var(--color-home-line);border-radius:18px;background:#fff}.chapter-map>header{display:flex;align-items:center;gap:12px}.chapter-map>header svg{color:var(--color-home-accent-hover)}.chapter-map h2,.chapter-modules h2,.chapter-revision h2{margin:3px 0 0;font:700 20px var(--font-display)}.chapter-map>ul{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:14px;margin:22px 0 0;padding:0;list-style:none}.chapter-map li{list-style:none}.chapter-map li>span{display:block;padding:11px 13px;border-left:3px solid var(--color-home-accent);background:var(--color-home-accent-soft);font-size:12px;font-weight:700}.chapter-map li ul{display:grid;gap:7px;margin:8px 0 0 14px;padding:0}.chapter-map li li>span{border-left-width:1px;background:#f7fafc;color:var(--color-home-muted);font-weight:600}.chapter-modules{margin-top:34px}.chapter-modules>header{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}.chapter-modules>header>span{display:flex;align-items:center;gap:6px;color:var(--color-home-muted);font-size:11px}.chapter-modules>article{display:grid;grid-template-columns:48px minmax(0,1fr);gap:18px;padding:22px 0;border-top:1px solid var(--color-home-line)}.chapter-modules>article>span{color:var(--color-home-accent);font:700 24px var(--font-display)}.chapter-modules small{color:var(--color-home-muted);font-size:10px;text-transform:uppercase}.chapter-modules h3{margin:4px 0 5px;font:700 17px var(--font-display)}.chapter-modules p{margin:0;color:var(--color-home-muted);font-size:12px;line-height:1.55}.chapter-modules ul{display:flex;flex-wrap:wrap;gap:6px;margin:11px 0 0;padding:0;list-style:none}.chapter-modules li{padding:5px 8px;border-radius:8px;background:var(--color-home-accent-soft);color:var(--color-home-accent-hover);font-size:9px}.chapter-coverage{display:flex;align-items:center;gap:14px;margin-top:24px;padding:18px;border:1px solid var(--color-home-line);border-radius:14px;background:#fff}.chapter-coverage svg{flex:0 0 auto;color:var(--color-home-accent-hover)}.chapter-coverage h2{margin:0;font:700 14px var(--font-display)}.chapter-coverage p{margin:4px 0 0;color:var(--color-home-muted);font-size:11px}.chapter-start{display:flex;align-items:center;justify-content:center;gap:9px;width:fit-content;min-height:50px;margin:25px 0 0 auto;padding:0 19px;border-radius:12px;background:var(--color-home-accent);color:#fff;text-decoration:none;font-size:12px;font-weight:800}.chapter-revision{display:grid;gap:24px;margin-top:32px}.chapter-revision>section,.revision-pair section{padding:22px;border:1px solid var(--color-home-line);border-radius:16px;background:#fff}.chapter-revision section>header{display:flex;align-items:center;gap:8px;margin-bottom:14px}.chapter-revision section>header svg{color:var(--color-home-accent-hover)}.revision-definitions{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:10px}.revision-definitions article{padding:14px;background:#f7fafc}.revision-definitions p,.revision-pair li,.revision-coverage p{color:var(--color-home-muted);font-size:11px;line-height:1.55}.revision-equations{display:flex;flex-wrap:wrap;gap:10px}.revision-equations strong{padding:14px 18px;border-radius:11px;background:#10264a;color:#fff}.revision-pair{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}.revision-pair ul{margin:0;padding-left:18px}.revision-coverage p{padding:8px 0;border-top:1px solid var(--color-home-line);margin:0}.revision-actions{display:flex;flex-wrap:wrap;gap:9px;justify-content:flex-end}.revision-actions :is(button,a){min-height:44px;padding:0 14px;border:1px solid var(--color-home-line);border-radius:10px;background:#fff;color:var(--color-home-ink);text-decoration:none;font-size:11px;font-weight:700}.revision-actions button:disabled{opacity:.48}.revision-lessons header p{margin:3px 0 0;color:var(--color-home-muted);font-size:11px;line-height:1.5}.revision-lessons>div{display:grid;gap:8px}.revision-lessons a{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:46px;padding:0 14px;border:1px solid var(--color-home-line);border-radius:10px;color:var(--color-home-ink);background:#f7fafc;text-decoration:none;font-size:12px;font-weight:700}.revision-lessons a:hover{border-color:var(--color-home-accent);background:#fff}.revision-lessons a svg{color:var(--color-home-accent-hover)}@media(max-width:700px){.chapter-topbar{padding-inline:16px}.chapter-topbar>span{display:none}.chapter-page main{width:calc(100% - 24px);padding-top:28px}.chapter-intro{grid-template-columns:1fr;gap:22px}.chapter-map>ul,.revision-pair{grid-template-columns:1fr}.chapter-modules>article{grid-template-columns:36px minmax(0,1fr)}.chapter-start{width:100%}.revision-actions{flex-direction:column}.revision-actions :is(button,a){display:grid;place-items:center;width:100%}}.chapter-review-main{width:min(960px,calc(100% - 48px));margin:0 auto;padding:32px 0 90px;animation:syllabus-enter .52s var(--ease-out) both}.review-back{display:inline-flex;align-items:center;gap:7px;min-height:40px;color:var(--color-home-muted);text-decoration:none;font-size:12px;font-weight:700}.review-back:hover{color:var(--color-home-accent-hover)}.chapter-review-heading{display:flex;align-items:end;justify-content:space-between;gap:28px;padding:13px 0 25px;border-bottom:1px solid var(--color-home-line)}.chapter-review-heading>div:first-child>span{color:var(--color-home-accent-hover);font-size:12px;font-weight:700}.chapter-review-heading h1{margin:5px 0 4px;font:700 clamp(30px,3.2vw,43px)/1.05 var(--font-display);letter-spacing:-.045em}.chapter-review-heading p{margin:0;color:var(--color-home-muted);font-size:14px}.review-status-list{display:grid;justify-items:start;gap:7px;min-width:176px}.review-status-list span{display:inline-flex;align-items:center;gap:7px;color:var(--color-home-muted);font-size:10px}.review-status-list span.is-done{color:#147558}.review-status-list span.is-done svg{border-radius:50%;background:#dff6ec}.review-tabs{display:grid;grid-template-columns:repeat(3,1fr);margin:22px 0;overflow:hidden;border:1px solid var(--color-home-line);border-radius:14px;background:#fff}.review-tabs button{position:relative;display:flex;align-items:center;justify-content:center;gap:8px;min-height:52px;border:0;border-right:1px solid var(--color-home-line);background:#fff;color:var(--color-home-muted);font-size:12px;font-weight:700}.review-tabs button:last-child{border-right:0}.review-tabs button:hover{background:var(--color-home-accent-soft);color:var(--color-home-ink)}.review-tabs button.is-active{background:var(--color-home-accent-soft);color:var(--color-home-accent-hover)}.review-tabs button.is-active:after{content:"";position:absolute;right:16px;bottom:0;left:16px;height:3px;border-radius:3px 3px 0 0;background:var(--color-home-accent)}.review-summary{display:grid;gap:14px}.review-panel{overflow:clip;border:1px solid var(--color-home-line);border-radius:16px;background:#fff}.review-panel--intro{padding:22px 24px;background:linear-gradient(90deg,var(--color-home-accent-soft),#fff 72%)}.review-panel--intro>span{color:var(--color-home-accent-hover);font-size:10px;font-weight:700;text-transform:uppercase}.review-panel--intro h2{margin:6px 0 5px;font:700 20px/1.25 var(--font-display)}.review-panel--intro p{max-width:700px;margin:0;color:var(--color-home-muted);font-size:12px;line-height:1.6}.review-panel__heading{display:flex;align-items:center;justify-content:space-between;min-height:60px;padding:0 20px;border-bottom:1px solid var(--color-home-line)}.review-panel__heading>div{display:flex;align-items:center;gap:11px}.review-panel__heading span{display:grid;place-items:center;width:29px;height:29px;border-radius:9px;background:var(--color-home-accent-soft);color:var(--color-home-accent-hover);font-size:10px;font-weight:700}.review-panel__heading h2{margin:0;font:700 15px/1.2 var(--font-display)}.review-panel__heading small{color:var(--color-home-muted);font-size:10px}.summary-topics details+details{border-top:1px solid #edf2f7}.summary-topics summary{display:grid;grid-template-columns:52px minmax(0,1fr) auto 18px;align-items:center;gap:10px;min-height:50px;padding:6px 20px;cursor:pointer;list-style:none}.summary-topics summary:hover{background:#f9fcff}.summary-topics summary::-webkit-details-marker{display:none}.summary-topics summary>span{color:var(--color-home-accent-hover);font-size:11px;font-weight:700}.summary-topics summary strong{font-size:12px}.summary-topics summary small{color:var(--color-home-muted);font-size:9px}.summary-topics summary svg{color:var(--color-home-muted);transition:transform .18s}.summary-topics details[open] summary svg{transform:rotate(180deg)}.summary-topics details>div{padding:3px 20px 15px 72px}.topic-notes-content{padding-top:0!important}.topic-notes-content .topic-summary-sections{padding:0}.module-notes-list{display:grid;gap:10px}.module-note{padding:15px;border:1px solid #e1ebf4;border-radius:12px;background:#fbfdff}.module-note header{display:flex;align-items:baseline;gap:9px}.module-note header span{color:var(--color-home-accent-hover);font-size:9px;font-weight:800;letter-spacing:.08em}.module-note h3{margin:0;color:var(--color-home-ink);font:700 15px/1.25 var(--font-display)}.module-note>p{margin:7px 0;color:#40536b;font-size:11px;line-height:1.5}.module-note ul{display:grid;gap:4px;margin:7px 0 0;padding-left:17px;color:#40536b;font-size:11px;line-height:1.45}.module-note .summary-mistake{margin-top:10px}.summary-topics h3{margin:11px 0 5px;color:var(--color-home-accent-hover);font-size:9px;letter-spacing:.06em;text-transform:uppercase}.summary-topics p{margin:0;padding:7px 0;color:#40536b;font-size:11px;line-height:1.5}.review-facts{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));margin:0}.review-facts>div{padding:15px 20px;border-right:1px solid #edf2f7;border-bottom:1px solid #edf2f7}.review-facts>div:nth-child(2n){border-right:0}.review-facts dt{color:var(--color-home-ink);font-size:11px;font-weight:700}.review-facts dd{margin:5px 0 0;color:var(--color-home-muted);font-size:11px;line-height:1.5}.review-facts--equations dd{color:var(--color-home-accent-hover);font:700 15px/1.5 ui-monospace,SFMono-Regular,Consolas,monospace}.review-checklist{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));margin:0;padding:10px 20px 17px;list-style:none}.review-checklist li{display:flex;align-items:flex-start;gap:9px;padding:10px 12px;color:#40536b;font-size:11px;line-height:1.5}.review-checklist svg{flex:0 0 auto;color:#208360}.review-checklist--warning svg{color:#b06b17}.topic-summary-sections{display:grid;gap:0;padding:0 20px 8px}.topic-summary-section{padding:20px 0;border-bottom:1px solid #edf2f7}.topic-summary-section:last-child{border-bottom:0}.topic-summary-section>header{display:flex;align-items:baseline;gap:10px;margin-bottom:9px}.topic-summary-section>header>span{color:var(--color-home-accent-hover);font-size:10px;font-weight:800;letter-spacing:.08em}.topic-summary-section h3{margin:0;font:700 17px/1.25 var(--font-display);color:var(--color-home-ink)}.topic-summary-section>p{margin:0 0 10px;color:#40536b;font-size:12px;line-height:1.65}.topic-summary-section ul{display:grid;gap:6px;margin:0;padding-left:18px;color:#40536b;font-size:12px;line-height:1.55}.summary-comparison{overflow-x:auto;margin-top:12px;border:1px solid var(--color-home-line);border-radius:11px}.summary-comparison>div{display:grid;grid-template-columns:repeat(3,minmax(150px,1fr));min-width:480px}.summary-comparison>div:first-child{background:var(--color-home-accent-soft);color:var(--color-home-accent-hover);font-size:10px;text-transform:uppercase;letter-spacing:.05em}.summary-comparison>div>*{padding:10px 12px;border-right:1px solid #edf2f7;border-bottom:1px solid #edf2f7;font-size:11px;line-height:1.45}.summary-comparison>div>*:last-child{border-right:0}.summary-formula{display:grid;gap:5px;margin-top:13px;padding:16px;border-radius:12px;background:#10264a;color:#fff}.summary-formula span{color:#9ed7ff;font-size:10px;font-weight:800;text-transform:uppercase}.summary-formula strong{font:700 24px/1.25 ui-monospace,SFMono-Regular,Consolas,monospace}.summary-formula small{color:#d8e9f8;font-size:10px}.summary-example{display:grid;gap:7px;margin-top:13px;padding:15px;border-left:3px solid var(--color-home-accent);background:#f7fbff}.summary-example>b,.summary-tip b,.summary-mistake b{color:var(--color-home-accent-hover);font-size:10px;letter-spacing:.06em;text-transform:uppercase}.summary-example>strong{color:var(--color-home-ink);font-size:12px}.summary-example ol{display:grid;gap:4px;margin:0;padding-left:19px;color:#40536b;font-size:11px;line-height:1.5}.summary-example em{color:#147558;font-size:13px;font-weight:800;font-style:normal}.summary-tip,.summary-mistake{display:grid;gap:4px;margin-top:12px;padding:12px 14px;border-radius:10px;font-size:11px;line-height:1.5}.summary-tip{background:#fffaf0}.summary-tip span{color:#6d5727}.summary-mistake{background:#fff5f3}.summary-mistake span{color:#9f4c43}.summary-mistake strong{color:#147558}.summary-diagram{display:block;width:min(100%,620px);margin-top:14px;border:1px solid var(--color-home-line);border-radius:12px;background:#fbfdff}.coverage-audit>p{margin:14px 20px;color:var(--color-home-muted);font-size:11px;line-height:1.5}.coverage-audit>div{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,1fr);gap:8px 18px;padding:10px 20px;border-top:1px solid #edf2f7;font-size:10px;line-height:1.4}.coverage-audit>div span{color:var(--color-home-muted)}.mind-map-layout{display:grid;grid-template-columns:minmax(0,1fr) 286px;gap:16px;align-items:start}.mind-map-canvas,.mind-map-detail{border:1px solid var(--color-home-line);border-radius:16px;background:#fff}.mind-map-canvas{min-height:560px;padding:24px;overflow-x:auto}.mind-map-root{display:grid;min-width:250px;margin:0 auto 25px;padding:14px 22px;border:1px solid var(--color-home-accent);border-radius:14px;background:var(--color-home-accent);color:#fff;text-align:center}.mind-map-root span{font-size:9px;text-transform:uppercase}.mind-map-root strong{margin-top:3px;font:700 15px/1.3 var(--font-display)}.mind-map-branches{position:relative;display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:12px;padding-top:18px}.mind-map-branches:before{content:"";position:absolute;top:0;right:10%;left:10%;height:1px;background:var(--color-home-line-strong)}.mind-map-branch{position:relative}.mind-map-branch:before{content:"";position:absolute;top:-18px;left:50%;width:1px;height:18px;background:var(--color-home-line-strong)}.mind-map-group{display:flex;align-items:center;gap:8px;width:100%;min-height:58px;padding:9px 11px;border:1px solid var(--color-home-line-strong);border-radius:12px;background:var(--color-home-accent-soft);text-align:left}.mind-map-group:hover{border-color:var(--color-home-accent);transform:translateY(-1px)}.mind-map-group>svg{flex:0 0 auto;color:var(--color-home-accent-hover);transition:transform .18s}.mind-map-group[aria-expanded=false]>svg{transform:rotate(-90deg)}.mind-map-group span{display:grid;gap:2px}.mind-map-group strong{font-size:11px}.mind-map-group small{color:var(--color-home-muted);font-size:9px}.mind-map-topics{display:grid;gap:7px;margin:9px 0 0 13px;padding-left:12px;border-left:1px solid var(--color-home-line-strong)}.mind-map-topic>button{display:flex;align-items:center;gap:6px;width:100%;min-height:42px;padding:7px 9px;border:1px solid var(--color-home-line);border-radius:10px;background:#fff;color:#344a65;text-align:left;font-size:10px;line-height:1.3}.mind-map-topic>button:hover{border-color:var(--color-home-line-strong);background:#f9fcff;transform:translate(2px)}.mind-map-topic>button>svg{flex:0 0 auto;transition:transform .18s}.mind-map-topic>button[aria-expanded=false]>svg{transform:rotate(-90deg)}.mind-map-topic>button span{display:grid}.mind-map-topic>button b{color:var(--color-home-accent-hover);font-size:9px}.mind-map-lessons{display:grid;gap:4px;padding:5px 0 2px 14px}.mind-map-lessons button{display:flex;align-items:center;justify-content:space-between;gap:8px;min-height:34px;padding:5px 8px;border:0;border-radius:8px;background:transparent;color:var(--color-home-muted);text-align:left;font-size:9px}.mind-map-lessons button:hover{background:var(--color-home-accent-soft);color:var(--color-home-accent-hover)}.mind-map-detail{position:sticky;top:calc(var(--physics-shell-header-height) + 22px);padding:20px}.mind-map-detail>span{color:var(--color-home-accent-hover);font-size:9px;font-weight:700;text-transform:uppercase}.mind-map-detail h2{margin:7px 0;font:700 18px/1.3 var(--font-display)}.mind-map-detail p{margin:0;color:var(--color-home-muted);font-size:11px;line-height:1.55}.mind-map-detail>div{display:flex;flex-wrap:wrap;gap:5px;margin-top:14px}.mind-map-detail small{padding:5px 7px;border-radius:7px;background:#f1f6fb;color:#4f6278;font-size:9px}.mind-map-detail>a{display:flex;align-items:center;justify-content:center;gap:7px;min-height:42px;margin-top:18px;border-radius:11px;background:var(--color-home-accent);color:#fff;text-decoration:none;font-size:11px;font-weight:700}.mind-map-detail>a.mind-map-detail__notes{margin-top:8px;background:#f1f6fb;color:var(--color-home-accent-hover)}.chapter-notes{min-height:560px;padding:0 0 60px;border:1px solid var(--color-home-line);border-radius:16px;background:#fff}.notes-toolbar{position:sticky;z-index:4;top:var(--physics-shell-header-height);display:flex;align-items:center;justify-content:space-between;min-height:52px;padding:0 18px;border-bottom:1px solid var(--color-home-line);border-radius:16px 16px 0 0;background:#fffffff5;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.notes-toolbar>span{display:flex;align-items:center;gap:6px;color:var(--color-home-muted);font-size:10px}.notes-toolbar>span.is-saved{color:#147558}.notes-toolbar>div{display:flex;gap:3px}.notes-toolbar button{display:grid;place-items:center;width:38px;height:38px;border:0;border-radius:9px;background:transparent;color:#52657b}.notes-toolbar button:hover{background:var(--color-home-accent-soft);color:var(--color-home-accent-hover)}.notes-empty{display:grid;justify-items:center;max-width:390px;margin:70px auto 35px;padding:0 22px;text-align:center}.notes-empty svg{color:var(--color-home-accent)}.notes-empty h2{margin:11px 0 5px;font:700 18px/1.2 var(--font-display)}.notes-empty p{margin:0;color:var(--color-home-muted);font-size:11px;line-height:1.55}.notes-blocks{display:grid;gap:8px;max-width:760px;margin:24px auto 0;padding:0 22px}.note-block{position:relative;display:grid;grid-template-columns:24px minmax(0,1fr) 34px;align-items:start;gap:4px;padding:10px 7px;border:1px solid transparent;border-radius:11px}.note-block:hover,.note-block:focus-within{border-color:var(--color-home-line)}.note-block__drag{margin-top:6px;color:#9aa8b8}.note-block__label{display:inline-flex;margin-bottom:6px;color:var(--color-home-accent-hover);font-size:9px;font-weight:800;letter-spacing:.08em}.note-block__row{display:flex;gap:8px}.note-block__row>b{padding-top:2px;color:var(--color-home-accent-hover);font-size:12px}.note-block__editor{width:100%;min-height:24px;outline:0;color:#31465f;font-size:12px;line-height:1.65}.note-block__editor:empty:before{content:attr(data-placeholder);color:#9aa8b8}.note-block--heading .note-block__editor{font:700 20px/1.4 var(--font-display);color:var(--color-home-ink)}.note-block--formula,.note-block--key-point,.note-block--exam-tip{border-color:var(--color-home-line);background:#f9fcff}.note-block--formula .note-block__editor{color:var(--color-home-accent-hover);font:700 14px/1.6 ui-monospace,SFMono-Regular,Consolas,monospace}.note-block--exam-tip{background:#fffaf0}.note-block--exam-tip .note-block__label{color:#a46517}.note-block__delete{display:grid;place-items:center;width:32px;height:32px;border:0;border-radius:8px;background:transparent;color:#8796a8;opacity:0}.note-block:hover .note-block__delete,.note-block:focus-within .note-block__delete{opacity:1}.note-block__delete:hover{background:#fff0f0;color:#b33b3b}.note-divider{display:flex;align-items:center;gap:8px;max-width:760px;margin:8px auto;padding:0 29px;color:#9aa8b8}.note-divider hr{flex:1;border:0;border-top:1px solid var(--color-home-line)}.note-divider button{display:grid;place-items:center;width:32px;height:32px;border:0;background:transparent;color:inherit;opacity:0}.note-divider:hover button{opacity:1}.add-block{position:relative;max-width:716px;margin:18px auto 0}.add-block>button{display:inline-flex;align-items:center;gap:7px;min-height:42px;padding:0 13px;border:1px solid var(--color-home-line);border-radius:11px;background:#fff;color:var(--color-home-accent-hover);font-size:11px;font-weight:700}.add-block>button:hover{border-color:var(--color-home-line-strong);background:var(--color-home-accent-soft)}.add-block__menu{position:absolute;z-index:8;top:calc(100% + 7px);left:0;display:grid;grid-template-columns:repeat(2,190px);gap:2px;padding:7px;border:1px solid var(--color-home-line);border-radius:13px;background:#fff;box-shadow:0 14px 36px #103b7026}.add-block__menu button{display:grid;grid-template-columns:27px 1fr;align-items:center;gap:7px;min-height:48px;padding:6px 8px;border:0;border-radius:9px;background:#fff;text-align:left}.add-block__menu button:hover{background:var(--color-home-accent-soft)}.add-block__menu button>svg,.add-block__menu button>span:first-child{color:var(--color-home-accent-hover)}.add-block__menu button>span:last-child{display:grid}.add-block__menu strong{font-size:10px}.add-block__menu small{color:var(--color-home-muted);font-size:8px}.chapter-review-page :is(button,a,[contenteditable]):focus-visible{outline:3px solid var(--color-home-focus);outline-offset:2px}@media(prefers-reduced-motion:no-preference){.mind-map-group,.mind-map-topic>button{transition:border-color .18s,background .18s,transform .18s}}@media(max-width:820px){.mind-map-layout{grid-template-columns:1fr}.mind-map-detail{position:static}.chapter-review-heading{align-items:start}}@media(max-width:620px){.chapter-review-main{width:100%;padding:22px 12px 70px}.chapter-review-heading{display:grid}.review-status-list{grid-template-columns:1fr}.review-tabs button{min-height:56px;padding:0 5px}.review-tabs button span{font-size:10px}.review-facts,.review-checklist{grid-template-columns:1fr}.review-facts>div{border-right:0}.summary-topics details>div{padding-left:20px}.mind-map-canvas{padding:16px 12px}.mind-map-branches{grid-template-columns:1fr}.mind-map-branches:before,.mind-map-branch:before{display:none}.notes-toolbar{top:117px}.add-block{margin-inline:22px}.add-block__menu{grid-template-columns:minmax(0,1fr);width:min(300px,calc(100vw - 44px))}}.practice-page{--syllabus-nav-height: var(--physics-shell-header-height);min-height:100dvh;color:var(--ink, #10234a);background:var(--physics-shell-background)}.practice-layout{width:100%;margin:0;display:grid;grid-template-columns:var(--physics-shell-sidebar-width) minmax(0,1fr) var(--physics-shell-right-panel-width);gap:var(--physics-shell-content-gap);padding:var(--physics-shell-content-top) 22px 52px 0}.physics-placeholder-layout .practice-main{grid-column:2}.practice-sidebar,.practice-summary-card,.practice-tip,.practice-progress,.practice-table,.practice-mode{border:1px solid #dbe7f5;border-radius:16px;background:#ffffffe6;box-shadow:0 10px 28px #214a7f0b}.practice-sidebar{align-self:start;position:sticky;top:calc(var(--physics-shell-header-height) + 24px);padding:18px 14px}.practice-sidebar h2{margin:5px 9px 13px;font-size:1rem}.practice-unit-list{display:grid;gap:3px}.practice-unit{display:grid;grid-template-columns:22px minmax(0,1fr) auto;align-items:center;gap:7px;width:100%;padding:12px 9px;color:#1b335b;border:1px solid transparent;border-radius:10px;background:transparent;font:inherit;font-size:.86rem;text-align:left;cursor:pointer;transition:background .18s ease,border-color .18s ease,transform .18s ease}.practice-unit:hover{background:#f0f7ff;border-color:#dceaff}.practice-unit:active{transform:scale(.985)}.practice-unit.active{border-color:#d6e8ff;background:#eef6ff;color:#176be5;box-shadow:inset 3px 0 #3180ef}.practice-unit-number,.practice-unit-progress{font-weight:800}.practice-unit-progress{color:#6680a3;font-size:.79rem}.practice-unit.active .practice-unit-progress{color:#2476ed}.practice-filter-panel{display:grid;gap:13px;margin-top:22px;padding:20px 9px 3px;border-top:1px solid #e3ecf6}.practice-filter-panel h2{margin:0 0 5px}.practice-filter-panel label{display:grid;gap:6px;color:#26405f;font-size:.78rem;font-weight:760}.practice-filter-panel select,.count-control select{width:100%;min-height:38px;padding:0 10px;color:#263e60;border:1px solid #d6e3f2;border-radius:9px;background:#fff;font:inherit;cursor:pointer;outline:none}.practice-filter-panel select:focus,.count-control select:focus{border-color:#2f80ee;box-shadow:0 0 0 3px #2f80ee24}.filter-reset,.selection-actions button{color:#526f96;border:0;background:transparent;font:inherit;font-size:.79rem;font-weight:750;cursor:pointer}.filter-reset{justify-self:start;padding:5px 0}.filter-reset:hover,.selection-actions button:hover{color:#2174e9}.practice-main{min-width:0}.practice-heading{margin-bottom:26px}.practice-heading h1{margin:0 0 7px;color:#10234a;font-size:clamp(1.75rem,2.6vw,2.45rem);letter-spacing:-.045em}.practice-heading p{max-width:590px;margin:0;color:#597093;font-size:1rem;line-height:1.55}.practice-section-title{margin:0 0 11px;color:#142c50;font-size:1rem}.practice-modes{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin-bottom:30px}.practice-mode{position:relative;display:grid;min-height:170px;place-items:center;align-content:center;gap:9px;padding:19px 14px;color:#1a3359;text-align:center;cursor:pointer;transition:border-color .18s ease,background .18s ease,box-shadow .18s ease,transform .18s ease}.practice-mode:hover{border-color:#9fc8ff;box-shadow:0 14px 30px #206bd31c;transform:translateY(-2px)}.practice-mode:active{transform:scale(.98)}.practice-mode.selected{border-color:#3384f4;background:linear-gradient(150deg,#fafdff,#edf6ff);box-shadow:0 10px 25px #257ced1c}.mode-icon{display:grid;width:42px;height:42px;place-items:center;color:#2d80ef;border-radius:13px;background:#eaf4ff}.practice-mode strong{font-size:.91rem}.practice-mode span{max-width:140px;color:#67809f;font-size:.76rem;line-height:1.4}.recommended,.mode-selected{position:absolute;top:11px;right:11px;color:#1874e9;font-size:.66rem;font-weight:800}.recommended{top:auto;bottom:11px;right:auto}.selection-header{display:flex;align-items:center;justify-content:space-between;gap:12px}.selection-actions{display:flex;gap:14px}.practice-table{overflow:hidden}.practice-table-head,.practice-topic-row{display:grid;grid-template-columns:30px minmax(0,1fr) 76px 124px;align-items:center;column-gap:10px}.practice-table-head{min-height:35px;padding:0 16px;color:#6b81a0;border-bottom:1px solid #e4ecf6;font-size:.68rem;font-weight:800;text-transform:uppercase;letter-spacing:.035em}.practice-topic-row{width:100%;min-height:70px;padding:10px 16px;color:inherit;border:0;border-bottom:1px solid #e7eef7;background:#fff;text-align:left;cursor:pointer;transition:background .18s ease}.practice-topic-row:last-child{border-bottom:0}.practice-topic-row:hover{background:#f5faff}.practice-topic-row.disabled{cursor:default;opacity:.78}.practice-topic-row.disabled:hover{background:#fff}.topic-check{display:grid;place-items:center;width:18px;height:18px;border:1.5px solid #b7c8dc;border-radius:5px;color:#fff}.topic-check.checked{border-color:#2c7ff0;background:#2c7ff0;animation:check-in .18s ease-out}@keyframes check-in{0%{transform:scale(.75)}to{transform:scale(1)}}.topic-name{display:block;color:#173055;font-size:.87rem;font-weight:800;line-height:1.3}.topic-meta{display:block;margin-top:3px;color:#69809d;font-size:.74rem}.topic-coverage{color:#5b7699;font-size:.75rem;font-weight:750}.topic-question-count{color:#3d5b80;font-size:.77rem;font-weight:700}.topic-question-count.empty{color:#8496ab;font-weight:650}.selection-footer{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:14px 16px;color:#5a7396;border:1px solid #dbe7f5;border-top:0;border-radius:0 0 16px 16px;background:#f9fcff;font-size:.78rem;font-weight:700}.selection-footer strong{color:#1d6fdd}.selection-empty{margin:0;padding:30px 18px;color:#69809d;text-align:center}.practice-right{display:grid;align-content:start;gap:13px}.practice-tip{display:grid;grid-template-columns:66px 1fr;align-items:center;gap:6px;padding:14px;border:0;background:linear-gradient(135deg,#eaf5ff,#f7fbff)}.practice-tip img{width:63px;height:74px;object-fit:contain}.practice-tip b{display:block;margin-bottom:4px;color:#2877e9;font-size:.75rem}.practice-tip p{margin:0;color:#395677;font-size:.78rem;line-height:1.45}.practice-summary-card,.practice-progress{padding:17px}.practice-summary-card h2,.practice-progress h2{margin:0 0 15px;color:#183153;font-size:.91rem}.summary-metrics{display:grid;gap:14px}.summary-metric strong{display:block;color:#2678ed;font-size:1.2rem;line-height:1}.summary-metric span{display:block;margin-top:4px;color:#69809c;font-size:.74rem}.summary-details{display:grid;gap:4px;margin:16px 0;padding-top:14px;border-top:1px solid #e6eef7;color:#5c7597;font-size:.77rem;line-height:1.45}.summary-details b{color:#294d78}.count-control{display:grid;gap:6px;margin:13px 0 14px;color:#345270;font-size:.76rem;font-weight:760}.practice-start{display:flex;align-items:center;justify-content:center;gap:7px;width:100%;min-height:42px;color:#fff;border:1px solid #2f7de8;border-radius:10px;background:linear-gradient(135deg,#3a91f6,#2175e8);box-shadow:0 7px 16px #2576e833;font:inherit;font-size:.84rem;font-weight:800;cursor:pointer;transition:transform .18s ease,box-shadow .18s ease,filter .18s ease}.practice-start:hover:not(:disabled){filter:brightness(1.03);box-shadow:0 10px 19px #2576e847}.practice-start:hover:not(:disabled) svg{transform:translate(3px)}.practice-start:active:not(:disabled){transform:scale(.98)}.practice-start:disabled{color:#91a4ba;border-color:#dbe6f2;background:#eaf0f6;box-shadow:none;cursor:not-allowed}.practice-progress p{margin:0;color:#617a9d;font-size:.78rem;line-height:1.5}.progress-stat{display:flex;justify-content:space-between;gap:8px;margin-top:12px;color:#647c9d;font-size:.77rem}.progress-stat b{color:#234b76}.practice-session{width:min(700px,calc(100% - 40px));margin:70px auto}.practice-session-card{padding:clamp(25px,6vw,50px);text-align:center}.practice-session-card .mode-icon{margin:0 auto 16px}.practice-session-card h1{margin:0 0 10px;font-size:clamp(1.65rem,4vw,2.2rem);letter-spacing:-.04em}.practice-session-card p{color:#5c7597;line-height:1.55}.practice-session-actions{display:flex;justify-content:center;gap:10px;margin-top:23px}.practice-secondary{display:inline-grid;min-height:42px;place-items:center;padding:0 15px;color:#2b72d7;border:1px solid #cfe0f4;border-radius:10px;background:#fff;font:inherit;font-weight:780;text-decoration:none}@media(max-width:1200px){.practice-layout{grid-template-columns:220px minmax(0,1fr) 255px;gap:16px;width:min(100% - 32px,1160px)}.practice-modes{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:900px){.practice-layout{grid-template-columns:1fr}.physics-placeholder-layout .practice-main{grid-column:1}.practice-sidebar{position:static;display:grid;grid-template-columns:minmax(0,1fr) 230px;gap:18px}.practice-filter-panel{margin-top:0;padding-top:0;border-top:0;border-left:1px solid #e3ecf6;padding-left:17px}.practice-right{grid-template-columns:repeat(2,minmax(0,1fr))}.practice-tip{grid-column:span 2}}@media(max-width:620px){.practice-layout{width:min(100% - 24px,600px);padding-top:20px}.practice-sidebar{grid-template-columns:1fr;gap:15px}.practice-filter-panel{grid-template-columns:repeat(2,minmax(0,1fr));border-top:1px solid #e3ecf6;border-left:0;padding:16px 0 0}.practice-filter-panel h2,.filter-reset{grid-column:span 2}.practice-heading{margin-bottom:20px}.practice-modes{grid-template-columns:1fr}.practice-mode{min-height:120px;grid-template-columns:45px 1fr;text-align:left;place-items:start;align-content:center}.practice-mode .mode-icon{grid-row:span 2}.practice-mode span{max-width:none}.recommended{left:72px;right:auto}.practice-table-head{grid-template-columns:27px minmax(0,1fr) 92px;padding:0 11px}.practice-table-head span:nth-child(3),.topic-coverage{display:none}.practice-topic-row{grid-template-columns:27px minmax(0,1fr) 92px;padding:10px 11px}.selection-footer{align-items:flex-start;flex-direction:column}.practice-right{grid-template-columns:1fr}.practice-tip{grid-column:auto}.practice-start{position:sticky;bottom:10px}.practice-session{margin:32px auto}}.practice-sidebar nav{display:grid;gap:3px}.practice-sidebar nav button{display:grid;grid-template-columns:21px minmax(0,1fr) auto;align-items:center;gap:7px;width:100%;padding:12px 9px;color:#1b335b;border:1px solid transparent;border-radius:10px;background:transparent;font:inherit;font-size:.86rem;text-align:left;cursor:pointer;transition:background .18s ease,border-color .18s ease,transform .18s ease}.practice-sidebar nav button:hover{background:#f0f7ff;border-color:#dceaff}.practice-sidebar nav button:active{transform:scale(.985)}.practice-sidebar nav button.is-active{border-color:#d6e8ff;background:#eef6ff;color:#176be5;box-shadow:inset 3px 0 #3180ef}.practice-sidebar nav button span,.practice-sidebar nav button b{font-weight:800}.practice-sidebar nav button b{color:#6680a3;font-size:.79rem}.practice-filters{display:grid;gap:13px;margin-top:22px;padding:20px 9px 3px;border-top:1px solid #e3ecf6}.practice-filters h2{margin:0 0 5px}.practice-filters label{display:grid;gap:6px;color:#26405f;font-size:.78rem;font-weight:760}.practice-filters select,.summary-select select{width:100%;min-height:38px;padding:0 10px;color:#263e60;border:1px solid #d6e3f2;border-radius:9px;background:#fff;font:inherit;outline:none}.practice-filters select:focus,.summary-select select:focus{border-color:#2f80ee;box-shadow:0 0 0 3px #2f80ee24}.practice-filters button,.practice-topics header button{display:inline-flex;align-items:center;gap:5px;justify-self:start;padding:5px 0;color:#526f96;border:0;background:transparent;font:inherit;font-size:.79rem;font-weight:750;cursor:pointer}.practice-filters button:hover,.practice-topics header button:hover{color:#2174e9}.practice-heading>span{display:inline-block;margin-bottom:8px;color:#2d7ce9;font-size:.76rem;font-weight:800}.practice-modes{display:block;margin-bottom:30px}.practice-modes>header{margin-bottom:11px}.practice-modes>header h2,.practice-topics h2{margin:0;color:#142c50;font-size:1rem}.practice-modes>div{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}.practice-modes>div>button{position:relative;display:grid;min-height:170px;place-items:center;align-content:center;gap:9px;padding:19px 14px;color:#1a3359;border:1px solid #dbe7f5;border-radius:16px;background:#ffffffe6;box-shadow:0 10px 28px #214a7f0b;font:inherit;text-align:center;cursor:pointer;transition:border-color .18s ease,background .18s ease,box-shadow .18s ease,transform .18s ease}.practice-modes>div>button:hover{border-color:#9fc8ff;box-shadow:0 14px 30px #206bd31c;transform:translateY(-2px)}.practice-modes>div>button:active{transform:scale(.98)}.practice-modes>div>button.is-selected{border-color:#3384f4;background:linear-gradient(150deg,#fafdff,#edf6ff);box-shadow:0 10px 25px #257ced1c}.practice-modes svg{color:#2d80ef}.practice-modes strong{font-size:.91rem}.practice-modes p{max-width:140px;margin:0;color:#67809f;font-size:.76rem;line-height:1.4}.practice-modes small{position:absolute;bottom:11px;display:inline-flex;align-items:center;gap:4px;color:#1874e9;font-size:.66rem;font-weight:800}.practice-topics>header{display:flex;align-items:flex-end;justify-content:space-between;gap:12px;margin-bottom:11px}.practice-topics>header p{margin:4px 0 0;color:#6b81a0;font-size:.76rem}.practice-topics>header>div:last-child{display:flex;gap:14px}.topic-table{overflow:hidden;border:1px solid #dbe7f5;border-radius:16px;background:#fff;box-shadow:0 10px 28px #214a7f0b}.topic-table article{display:grid;grid-template-columns:30px minmax(0,1fr) 76px 124px;align-items:center;min-height:70px;padding:10px 16px;column-gap:10px;border-bottom:1px solid #e7eef7;transition:background .18s ease}.topic-table article:last-child{border-bottom:0}.topic-table article:hover{background:#f5faff}.topic-table article.is-unavailable{opacity:.74}.topic-table label{display:grid}.topic-table input{position:absolute;opacity:0;pointer-events:none}.topic-table .checkbox-mark{display:grid;place-items:center;width:18px;height:18px;color:#fff;border:1.5px solid #b7c8dc;border-radius:5px}.topic-table input:checked+.checkbox-mark{border-color:#2c7ff0;background:#2c7ff0;animation:check-in .18s ease-out}.topic-table article>div strong{display:block;color:#173055;font-size:.87rem;line-height:1.3}.topic-table article>div p,.topic-table article>div small{display:block;margin:3px 0 0;color:#69809d;font-size:.74rem}.topic-coverage{display:grid;gap:2px;color:#69809d;font-size:.68rem}.topic-coverage b{color:#2d78df;font-size:.8rem}.topic-questions{color:#3d5b80;font-size:.77rem;font-weight:700}.practice-summary{display:grid;align-content:start;gap:13px}.practice-summary>.summary-card{padding:17px;border:1px solid #dbe7f5;border-radius:16px;background:#ffffffe6;box-shadow:0 10px 28px #214a7f0b}.summary-card h2{margin:0 0 15px;color:#183153;font-size:.91rem}.summary-card .summary-metric{margin:0 0 14px}.summary-select{display:grid;gap:6px;margin:14px 0;padding-top:14px;border-top:1px solid #e6eef7;color:#345270;font-size:.76rem;font-weight:760}.summary-note{min-height:34px;margin:0 0 14px;color:#5c7597;font-size:.77rem;line-height:1.45}.practice-tip>span{color:#2877e9;font-size:.75rem;font-weight:800}.practice-progress{display:grid;gap:13px}.practice-progress>div{display:flex;align-items:flex-start;gap:9px;color:#2c7ce7}.practice-progress>div span{display:grid;gap:3px}.practice-progress>div strong{color:#294d78;font-size:.77rem}.practice-progress>div small{color:#69809d;font-size:.7rem;line-height:1.35}.practice-mode-label{justify-self:end;display:inline-flex;align-items:center;gap:5px;color:#597093;font-size:.8rem;font-weight:700}.practice-session>a{display:inline-flex;align-items:center;gap:5px;color:#347be2;font-size:.85rem;font-weight:750;text-decoration:none}.practice-session>section{margin-top:18px;padding:clamp(25px,6vw,50px);color:#183153;border:1px solid #dbe7f5;border-radius:18px;background:#fff;box-shadow:0 12px 32px #214a7f12;text-align:center}.practice-session>section>span{display:inline-flex;align-items:center;gap:5px;color:#2877e9;font-size:.8rem;font-weight:800}.practice-session>section h1{margin:12px 0 10px;font-size:clamp(1.65rem,4vw,2.2rem);letter-spacing:-.04em}.practice-session>section p{color:#5c7597;line-height:1.55}.practice-session>section>div{display:grid;gap:8px;place-items:center;margin:22px 0;color:#2c7ce7}.practice-session .practice-start{display:inline-flex;width:auto;padding:0 17px;text-decoration:none}@media(max-width:1200px){.practice-modes>div{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:900px){.practice-sidebar{grid-template-columns:minmax(0,1fr) 230px;gap:18px}.practice-filters{margin-top:0;padding-top:0;padding-left:17px;border-top:0;border-left:1px solid #e3ecf6}.practice-summary{grid-template-columns:repeat(2,minmax(0,1fr))}.practice-summary .practice-tip{grid-column:span 2}}@media(max-width:620px){.practice-sidebar{grid-template-columns:1fr}.practice-filters{grid-template-columns:repeat(2,minmax(0,1fr));padding:16px 0 0;border-top:1px solid #e3ecf6;border-left:0}.practice-filters h2,.practice-filters button{grid-column:span 2}.practice-modes>div{grid-template-columns:1fr}.practice-modes>div>button{min-height:120px;grid-template-columns:45px 1fr;text-align:left;place-items:start;align-content:center}.practice-modes>div>button svg{grid-row:span 2}.practice-modes p{max-width:none}.practice-modes small{left:72px;right:auto}.topic-table article{grid-template-columns:27px minmax(0,1fr) 92px;padding:10px 11px}.topic-coverage{display:none}.practice-summary{grid-template-columns:1fr}.practice-summary .practice-tip{grid-column:auto}}.practice-player{min-height:100dvh;background:linear-gradient(180deg,#f8fbff,#fff 44%);color:#163154}.player-nav{display:grid;grid-template-columns:auto auto minmax(0,1fr) auto;align-items:center;gap:14px;min-height:78px;padding:0 clamp(20px,4vw,58px);border-bottom:1px solid #dce7f5;background:#fff}.player-nav .syllabus-brand{display:flex;align-items:center;gap:7px;color:#10234a;font-size:23px;font-weight:850;letter-spacing:-.05em;text-decoration:none}.player-nav .syllabus-brand img{width:38px;height:48px;object-fit:contain}.player-course{padding-left:14px;border-left:1px solid #d6e1ef;color:#577092;font-weight:650}.player-nav nav{justify-self:center;display:flex;gap:14px}.player-nav nav a,.player-nav nav button{padding:11px 9px;color:#506987;border:0;border-bottom:3px solid transparent;background:transparent;font:inherit;font-size:.92rem;font-weight:760;text-decoration:none}.player-nav nav a.active{color:#1973e7;border-color:#287cf0}.finish-button{min-height:42px;padding:0 14px;border:1px solid #d6e3f2;border-radius:10px;background:#fff;color:#204268;font:inherit;font-weight:800;cursor:pointer}.player-layout{display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:20px;width:min(1470px,calc(100% - 48px));margin:0 auto;padding:28px 0 48px}.player-card,.navigator-card,.question-info,.player-tip,.help-card{border:1px solid #dbe7f5;border-radius:15px;background:#fff;box-shadow:0 10px 28px #1b5b9408}.player-card{padding:clamp(22px,3vw,42px)}.player-question-header{display:flex;align-items:start;justify-content:space-between;gap:16px}.player-question-header p{margin:0;color:#2877e9;font-weight:800}.player-question-header h1{margin:8px 0 0;font-size:clamp(1.22rem,2.4vw,1.75rem);letter-spacing:-.035em}.player-question-header>span{border:1px solid #cfe0f4;border-radius:8px;padding:8px 12px;color:#254f81;font-size:.85rem;font-weight:800}.player-question{display:grid;grid-template-columns:28px minmax(0,1fr);gap:12px;margin:28px 0 20px}.paper-number{font-family:Arial,sans-serif;font-size:1.05rem;font-weight:700;color:#202c38}.session-prompt{grid-column:2;margin:0 0 12px;color:#1c365d;font-size:1.03rem;line-height:1.55}.session-diagram{grid-column:2;display:block;width:min(100%,660px);height:auto;margin:4px auto 18px;color:#252a31;font-family:Arial,sans-serif}.session-diagram text{font-size:23px;fill:#252a31}.session-table-wrap{grid-column:2;overflow-x:auto;margin:4px 0 18px}.session-table-wrap table{width:min(100%,510px);border-collapse:collapse;text-align:center;color:#162f56}.session-table-wrap th,.session-table-wrap td{border:1px solid #d9e4f0;padding:11px 16px}.session-table-wrap th{background:#f4f8fc;font-weight:800}.player-answer{margin-top:24px;padding-top:24px;border-top:1px solid #e1ebf5}.player-answer h2{margin:0 0 16px;font-size:1.05rem}.session-options{display:grid;gap:9px;max-width:700px}.session-options button{display:grid;grid-template-columns:32px minmax(0,1fr) auto;align-items:center;gap:12px;min-height:55px;padding:10px 13px;border:1px solid #d5e2ef;border-radius:10px;background:#fff;color:#19375e;text-align:left;font:inherit;cursor:pointer;transition:transform .16s,border-color .16s,background .16s,box-shadow .16s}.session-options button:hover:not(:disabled){border-color:#66a7fa;box-shadow:0 5px 14px #1d73df12}.session-options button:active:not(:disabled){transform:scale(.99)}.session-options button:focus-visible,.player-actions button:focus-visible,.player-footer button:focus-visible,.finish-button:focus-visible{outline:3px solid #96c4ff;outline-offset:3px}.session-options b{display:grid;place-items:center;width:28px;height:28px;border-radius:7px;background:#edf4fc;color:#2877e9}.session-options .selected{border-color:#287cf0;background:#eff7ff}.session-options .selected b{background:#287cf0;color:#fff}.session-options .correct{border-color:#8bd7ae;background:#effbf5;color:#15764e}.session-options .correct b{background:#2ba96f;color:#fff}.session-options .wrong{border-color:#f2b8ad;background:#fff4f1;color:#b04a36}.session-options .wrong b{background:#e77863;color:#fff}.numeric-answer{display:flex;align-items:center;gap:10px;max-width:420px}.numeric-answer input{width:220px;min-height:48px;padding:0 12px;border:1px solid #cfe0f4;border-radius:9px;color:#173255;font:inherit;font-size:1rem}.player-actions{display:flex;align-items:center;gap:12px;margin-top:20px}.player-actions>button:not(.player-submit),.player-footer button{display:inline-flex;align-items:center;justify-content:center;gap:7px;min-height:42px;padding:0 13px;border:1px solid #d1e0f0;border-radius:9px;background:#fff;color:#2868ba;font:inherit;font-weight:780;cursor:pointer}.player-actions .flagged{border-color:#f2b458;background:#fff7e9;color:#a8650c}.player-submit{display:inline-flex;align-items:center;justify-content:center;gap:7px;min-height:44px;padding:0 17px;border:1px solid #287cf0;border-radius:9px;background:#287cf0;color:#fff;font:inherit;font-weight:850;text-decoration:none;cursor:pointer}.player-submit:disabled{border-color:#dbe6f2;background:#eaf0f6;color:#91a4ba;cursor:not-allowed}.qa-fill{border-color:#cfe0f4!important;background:#fff!important;color:#2569c9!important}.player-feedback{display:grid;grid-template-columns:auto 1fr;gap:13px;margin-top:22px;padding:18px;border-radius:12px}.player-feedback>svg{font-size:26px}.player-feedback h2,.player-feedback h3{margin:0 0 6px}.player-feedback h3{margin-top:14px;font-size:.9rem}.player-feedback p{margin:0;color:#416080;line-height:1.52}.player-feedback.is-correct{background:#effbf5;color:#19734f}.player-feedback.is-wrong{background:#fff6ed;color:#a35e10}.official-answer{display:grid;gap:3px;margin-top:14px;padding-top:12px;border-top:1px solid #cae8d8}.official-answer span{font-size:.72rem;font-weight:850;letter-spacing:.04em;text-transform:uppercase}.official-answer b{font-size:.88rem}.player-footer{display:grid;grid-template-columns:1fr minmax(200px,1.4fr) 1fr;align-items:center;gap:18px;margin-top:18px;padding:0 2px}.player-footer>button:last-child{justify-self:end}.player-footer button:disabled{opacity:.45;cursor:not-allowed}.player-footer>div{text-align:center;color:#355677;font-size:.85rem;font-weight:750}.player-footer i{display:block;height:4px;overflow:hidden;margin-top:10px;border-radius:999px;background:#dce6f2}.player-footer i b{display:block;height:100%;border-radius:inherit;background:#287cf0;transition:width .18s}.player-sidebar{align-self:start;display:grid;gap:16px}.navigator-card,.question-info,.player-tip,.help-card{padding:20px}.navigator-card h2,.question-info h2,.player-tip h2,.help-card h2{margin:0 0 14px;font-size:1rem}.navigator-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:10px}.navigator-grid button{aspect-ratio:1;border:1px solid #d7e2ef;border-radius:9px;background:#fff;color:#294a71;font:inherit;font-weight:800;cursor:pointer}.navigator-grid button.current{border:2px solid #287cf0;color:#287cf0;background:#eff7ff}.navigator-grid button.answered:not(.current){border-color:#98dcb9;background:#f0fbf5;color:#15764e}.navigator-grid button.review{border-color:#f2ba63;background:#fff8eb;color:#ae6d11}.navigator-key{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px;color:#526b89;font-size:.72rem}.navigator-key span{display:flex;align-items:center;gap:5px}.navigator-key i{width:10px;height:10px;border-radius:50%;background:#d8e1ed}.navigator-key i.answered{background:#78d4a4}.navigator-key i.review{background:#ffb34e}.question-info dl{display:grid;gap:12px;margin:0}.question-info dl div{display:flex;justify-content:space-between;gap:12px;color:#57708e;font-size:.82rem}.question-info dt{font-weight:650}.question-info dd{max-width:60%;margin:0;color:#1d3f68;text-align:right}.player-tip{display:grid;grid-template-columns:62px 1fr;gap:10px;background:linear-gradient(135deg,#ecf6ff,#fafcff)}.player-tip .aqua-mascot img{width:58px;height:auto}.player-tip h2{color:#2877e9}.player-tip p,.help-card p{margin:0;color:#476483;font-size:.82rem;line-height:1.5}.finish-dialog{position:fixed;z-index:50;inset:0;display:grid;place-items:center;padding:20px;background:#102a4c55}.finish-dialog>section{width:min(420px,100%);padding:26px;border-radius:16px;background:#fff;box-shadow:0 20px 60px #0e274c44}.finish-dialog h2{margin:0}.finish-dialog p{color:#56708f;line-height:1.5}.finish-dialog section>div{display:flex;justify-content:flex-end;gap:10px}.finish-dialog button:not(.player-submit){min-height:42px;padding:0 13px;border:1px solid #d3e0ed;border-radius:9px;background:#fff;color:#254c77;font:inherit;font-weight:750;cursor:pointer}.practice-results{width:min(660px,calc(100% - 40px));margin:70px auto;padding:42px;border:1px solid #dbe7f5;border-radius:18px;background:#fff;color:#173255;text-align:center}.practice-results>p:first-child{color:#2877e9;font-weight:850}.results-score{display:grid;place-items:center;width:150px;height:150px;margin:26px auto;border:8px solid #87bdf9;border-radius:50%;color:#2877e9}.results-score strong{font-size:1.7rem}.results-score span{color:#567493;font-size:.8rem}.practice-results>section{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:28px 0}.practice-results>section div{padding:14px;border-radius:10px;background:#f5f9fd}.practice-results>section b,.practice-results>section span{display:block}.practice-results>section b{color:#2877e9;font-size:1.2rem}.practice-results>section span{margin-top:4px;color:#5f7895;font-size:.75rem}.result-actions{display:flex;justify-content:center;gap:14px;align-items:center}.result-actions>a:not(.player-submit){color:#2877e9;font-weight:800;text-decoration:none}@media(max-width:1080px){.player-layout{grid-template-columns:1fr;width:min(100% - 32px,900px)}.player-sidebar{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:700px){.player-nav{grid-template-columns:auto 1fr;padding:0 15px;min-height:64px}.player-nav .syllabus-brand{font-size:20px}.player-nav .syllabus-brand img{width:32px;height:42px}.player-course,.player-nav nav{display:none}.finish-button{justify-self:end}.player-layout{width:min(100% - 24px,640px);padding-top:18px}.player-card{padding:20px}.player-question-header{display:block}.player-question-header>span{display:inline-block;margin-top:12px}.player-question{grid-template-columns:1fr}.paper-number,.session-prompt,.session-diagram,.session-table-wrap{grid-column:auto}.player-sidebar{grid-template-columns:1fr}.player-footer{grid-template-columns:1fr 1fr;gap:10px}.player-footer>div{grid-row:1;grid-column:span 2}.player-footer>button:last-child{justify-self:end}.player-actions{flex-wrap:wrap}.practice-results{margin:30px auto;padding:26px}.practice-results>section{grid-template-columns:1fr}.result-actions{flex-direction:column}}.practice-heading>span{color:var(--color-home-accent-hover, #247fc4);font-size:13px;font-weight:700}.practice-heading h1{margin:4px 0;font:700 clamp(32px,3.2vw,44px)/1.05 var(--font-display);letter-spacing:-.045em}.practice-heading p{margin:0;color:var(--color-home-muted, #597093);font-size:14px;line-height:1.45}.practice-section-title,.practice-modes>header h2,.practice-topics h2{font:700 17px/1.25 var(--font-display);letter-spacing:-.015em}.practice-heading{margin-bottom:24px}.practice-mode{min-height:118px;gap:8px;padding:16px}.practice-mode strong{font:700 13px/1.3 var(--font-display)}.practice-mode span,.practice-mode p{max-width:none;margin:0;color:var(--color-home-muted, #67809f);font-size:11px;line-height:1.45}.practice-modes{margin-bottom:22px}.practice-unit{min-height:58px;padding:10px;font-size:12px;line-height:1.35}.practice-unit-progress{font-size:10px}.practice-topic-row{min-height:54px;padding:8px 16px 8px 20px}.practice-topic-row .topic-name{font-size:13px;line-height:1.35}.practice-topic-row .topic-meta{font-size:9px}.practice-player{font-size:14px}.player-card{padding:28px}.player-question-header p{font-size:13px}.player-question-header h1{font:700 28px/1.15 var(--font-display);letter-spacing:-.035em}.player-question-header>span{padding:7px 11px;font-size:12px}.session-prompt{font-size:16px;line-height:1.55}.player-answer h2{font:700 17px/1.25 var(--font-display)}.session-options button{min-height:48px;font-size:15px}.navigator-card h2,.question-info h2,.player-tip h2,.help-card h2{font:700 17px/1.25 var(--font-display)}.question-info dl div,.player-tip p,.help-card p{font-size:13px}.practice-summary-card h2,.practice-progress h2{font:700 13px/1.25 var(--font-display)}.summary-metric strong{font:700 16px/1 var(--font-display)}.summary-metric span,.summary-note,.practice-tip p,.practice-progress p{font-size:11px;line-height:1.45}.count-control,.summary-select{font-size:10px}.practice-start{font-size:11px}.practice-tip b,.practice-tip>span{font-size:10px}.past-paper-figure{grid-column:2;display:block;width:min(100%,760px);max-height:520px;margin:6px auto 20px;object-fit:contain;border:1px solid #e0e8f2;border-radius:10px;background:#fff}.structured-player-layout{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:16px;width:min(1460px,calc(100% - 40px));margin:0 auto;padding:18px 0 42px}.structured-player-card{min-width:0;border:1px solid #dbe7f5;border-radius:16px;background:#fff;box-shadow:0 10px 30px #103b700a}.structured-player-card>.player-question-header{padding:24px 28px 18px}.structured-question-renderer{padding:0 28px 22px}.structured-context{margin:0 0 18px;color:#173055;font-size:16px;line-height:1.65}.structured-figure{margin:0 0 22px;padding:18px;border:1px solid #dbe7f5;border-radius:12px;background:#fff;text-align:center}.structured-figure img{display:block;max-width:100%;max-height:560px;margin:auto;object-fit:contain}.structured-figure figcaption{margin-top:10px;color:#173055;font-weight:700}.structured-part-list{display:grid;gap:12px}.structured-part-section{padding:18px;border:1px solid #dbe7f5;border-radius:12px;background:#fff}.structured-part-section>header{display:grid;grid-template-columns:auto 1fr auto;align-items:start;gap:14px}.structured-part-section>header strong{color:#2779e8}.structured-part-section>header p{margin:0;color:#173055;line-height:1.55}.structured-part-section>header span{white-space:nowrap;color:#526a86;font-size:13px;font-weight:700}.structured-written,.structured-short,.structured-number,.structured-number-row label,.structured-label-fields label{display:grid;gap:7px;margin:15px 0 0;color:#526a86;font-size:13px;font-weight:700}.structured-written textarea{min-height:118px;resize:vertical}.structured-written textarea,.structured-short input,.structured-number input,.structured-number-row input,.structured-label-fields input{width:100%;border:1px solid #cfdceb;border-radius:9px;background:#fff;padding:11px 12px;color:#173055;font:inherit}.structured-written small{justify-self:end;color:#8091a6;font-weight:500}.structured-number{grid-template-columns:auto minmax(110px,220px) auto;align-items:center}.structured-number-row,.structured-label-fields{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.structured-actions{display:flex;align-items:center;gap:10px;padding:14px 28px;border-top:1px solid #e7eef6}.structured-actions>span{margin-left:auto;color:#36a875;font-size:12px}.structured-actions button{min-height:38px;padding:0 13px;border:1px solid #d6e2ef;border-radius:9px;background:#fff}.structured-bottom-nav{grid-column:1/-1;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;padding:12px 18px;border:1px solid #dbe7f5;border-radius:12px;background:#fff}.structured-bottom-nav a{display:flex;align-items:center;gap:6px;color:#2779e8;text-decoration:none}.structured-bottom-nav a:last-child{justify-self:end}.structured-bottom-nav b{color:#526a86;font-size:13px}@media(max-width:900px){.structured-player-layout{grid-template-columns:1fr;width:min(100% - 24px,760px)}.structured-player-layout>.player-sidebar{grid-row:auto}.structured-bottom-nav{grid-column:1}.structured-number-row,.structured-label-fields{grid-template-columns:1fr}}.structured-subpart{margin:10px 0 0 34px}.structured-subpart .structured-part-section{background:#fbfdff}.structured-context--after-figure{margin-top:-4px}.structured-native-figure{max-width:620px;margin-inline:auto}.structured-native-figure svg{display:block;width:min(100%,520px);height:auto;margin:auto}.structured-native-figure text{fill:#163154;font:600 18px/1.2 inherit}.structured-short{max-width:640px}.structured-short input{min-height:44px}.structured-part-section.is-correct{border-color:#93d9b6;background:#f6fcf9}.structured-part-section.is-incorrect{border-color:#efc0b7;background:#fffaf8}.structured-part-feedback{display:grid;grid-template-columns:auto 1fr;gap:12px;margin-top:14px;padding:12px 14px;border-radius:9px;background:#fff}.structured-part-feedback strong{color:#173055}.structured-part-feedback p{margin:0;color:#526a86;font-size:13px;line-height:1.45}.structured-submit-summary{display:grid;grid-template-columns:auto 1fr;gap:12px;margin:0 28px 20px;padding:16px;border:1px solid #9eddbd;border-radius:11px;background:#f1fbf6;color:#1c7652}.structured-submit-summary p{margin:4px 0;color:#456c5d;font-size:13px}.structured-submit-summary details{margin-top:10px}.structured-submit-summary summary{cursor:pointer;font-size:13px;font-weight:800}.structured-submit-summary ul{margin:8px 0 0;padding-left:18px;color:#355d4e;font-size:13px}.structured-actions>span{display:inline-flex;align-items:center;gap:5px}.structured-actions button{display:inline-flex;align-items:center;justify-content:center;gap:6px;color:#2868ba;font:inherit;font-size:13px;font-weight:760;cursor:pointer}.structured-actions button:disabled{opacity:.5;cursor:not-allowed}.structured-actions .player-submit{min-width:132px;border-color:#287cf0;background:#287cf0;color:#fff}.structured-actions .flagged{border-color:#f2ba63;background:#fff8eb;color:#a96811}.structured-bottom-nav button{display:inline-flex;align-items:center;gap:6px;border:0;background:transparent;color:#2779e8;font:inherit;font-size:13px;font-weight:760;cursor:pointer}.structured-bottom-nav>div{text-align:center}.structured-bottom-nav i{display:block;width:220px;height:4px;margin-top:8px;overflow:hidden;border-radius:999px;background:#dce6f2}.structured-bottom-nav i b{display:block;height:100%;border-radius:inherit;background:#287cf0}.structured-player-layout .navigator-grid button{appearance:none;text-decoration:none}.structured-player-layout .navigator-card,.structured-player-layout .question-info{padding:18px}.structured-number input:disabled,.structured-short input:disabled,.structured-written textarea:disabled,.structured-number-row input:disabled,.structured-label-fields input:disabled{background:#f5f8fb;color:#425b77}.structured-player-card>.player-question-header h1{font-size:clamp(1.22rem,2vw,1.62rem)}.structured-submit-summary{margin:0 28px 18px;padding:14px 16px;border:1px solid #b9e5cf;border-radius:10px;background:#f2fbf7;color:#216a4e}.structured-submit-summary p{margin:4px 0 0;font-size:13px;line-height:1.5}.aqua-selectable-question{position:relative;min-width:0}.aqua-selection-ask{position:fixed;z-index:1200;display:inline-flex;align-items:center;gap:8px;height:36px;padding:8px 12px;border:1px solid #e1eaf6;border-radius:10px;background:#fff;box-shadow:0 4px 16px #2563eb14;color:#2563eb;font:600 14px/1 var(--font-body);white-space:nowrap;cursor:pointer;transform:translate(-50%,-100%) translateY(4px) scale(.97);opacity:0;animation:aqua-selection-ask-in .13s cubic-bezier(.22,1,.36,1) forwards;transition:background-color .12s ease,border-color .12s ease,box-shadow .12s ease,transform 80ms ease}.aqua-selection-ask.is-below{transform:translate(-50%) translateY(-4px) scale(.97);animation-name:aqua-selection-ask-in-below}.aqua-selection-ask:after{content:"";position:absolute;left:50%;bottom:-5px;width:9px;height:9px;border-right:1px solid #e1eaf6;border-bottom:1px solid #e1eaf6;background:#fff;transform:translate(-50%) rotate(45deg)}.aqua-selection-ask.is-below:after{top:-5px;bottom:auto;border-top:1px solid #e1eaf6;border-left:1px solid #e1eaf6;border-right:0;border-bottom:0}.aqua-selection-ask img{display:block;width:20px;height:21px;object-fit:contain}.aqua-selection-ask svg{margin-left:2px;color:#4b8df8}.aqua-selection-ask:hover{border-color:#b9d7f5;background:#f5faff;box-shadow:0 6px 18px #2563eb1f}.aqua-selection-ask:active{transform:translate(-50%,-100%) translateY(4px) scale(.97)}.aqua-selection-ask.is-below:active{transform:translate(-50%) translateY(-4px) scale(.97)}::selection{background:#67b2f747;color:inherit}@keyframes aqua-selection-ask-in{to{opacity:1;transform:translate(-50%,-100%) translateY(0) scale(1)}}@keyframes aqua-selection-ask-in-below{to{opacity:1;transform:translate(-50%) translateY(0) scale(1)}}@media(prefers-reduced-motion:reduce){.aqua-selection-ask{animation:none;opacity:1;transform:translate(-50%,-100%)}}.practice-summary-page{--practice-result-ink:#071951;--practice-result-muted:#6682b6;--practice-result-blue:#1684ff;--practice-result-line:#d6e9ff;min-height:100dvh;color:var(--practice-result-ink);background:radial-gradient(ellipse at 50% 76%,#e8f5ff 0,transparent 72%),linear-gradient(135deg,#f7fbff,#fbfdff 48%,#f0f9ff);font-family:Arial,Helvetica,sans-serif;padding:0 clamp(24px,3.9vw,65px) 32px}.practice-summary-page *{box-sizing:border-box}.practice-summary-page a{text-decoration:none;color:inherit}.practice-summary-page button{font:inherit;cursor:pointer}.practice-summary-page :is(a,button):focus-visible{outline:3px solid #80bfff;outline-offset:4px}.practice-result-main{max-width:1544px;margin:auto}.practice-result-hero{display:grid;grid-template-columns:minmax(0,1.65fr) minmax(180px,.9fr) minmax(290px,1.4fr) minmax(220px,1fr);align-items:center;gap:16px;min-height:310px;padding:26px 25px 25px 37px;border:1px solid #dcecff;border-radius:29px;background:linear-gradient(120deg,#ffffff8f,#f3faff99);box-shadow:0 16px 38px #58b0f609;animation:practice-result-enter .65s cubic-bezier(.22,1,.36,1) both}.practice-result-eyebrow{margin:0 0 12px;color:#1384ff;font-size:13px;font-weight:700;letter-spacing:2.8px}.practice-result-intro h1{margin:0;font-size:clamp(30px,2.95vw,49px);line-height:1.14;font-weight:750;letter-spacing:-1.7px;white-space:nowrap}.practice-result-description{max-width:430px;margin:13px 0 16px;color:var(--practice-result-muted);font-size:20px;line-height:1.4}.practice-result-topics{display:flex;align-items:center;gap:14px;min-height:74px;padding:11px 15px 11px 12px;border-radius:15px;background:#e5f2ffb5;color:#224687!important;transition:background .2s}.practice-result-topics:hover{background:#d7ebff}.practice-result-topic-icon{display:grid;place-items:center;flex-shrink:0;width:49px;height:49px;border-radius:13px;background:#f8fcff;color:var(--practice-result-blue)}.practice-result-topic-icon svg{width:27px;height:27px}.practice-result-topics>div{flex:1;min-width:0}.practice-result-topics strong{display:block;font-size:15px;font-weight:500}.practice-result-topics div>span{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:#6585bd;font-size:15px;line-height:1.6}.practice-result-topics>svg{flex-shrink:0;color:var(--practice-result-blue)}.practice-result-ring{position:relative;width:100%;max-width:255px;aspect-ratio:1;justify-self:center}.practice-result-ring svg{display:block;width:100%;height:100%;overflow:visible;transform:rotate(-90deg)}.practice-result-ring circle{fill:none}.practice-result-ring-halo{stroke:#fff9;stroke-width:14}.practice-result-ring-track{stroke:#d1e6ff;stroke-width:18}.practice-result-ring-draw{stroke:#acd4ff;stroke-width:18;stroke-dasharray:100;stroke-dashoffset:100;animation:practice-result-ring-draw 1.2s ease-out .15s forwards,practice-result-ring-settle 1s ease 1.35s forwards}.practice-result-ring-progress{stroke:#258bfa;stroke-width:18;stroke-linecap:butt;stroke-dasharray:100;stroke-dashoffset:100;animation:practice-result-ring-progress 1.2s ease-out .15s forwards}.practice-result-ring-copy{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;animation:practice-result-number .8s ease .2s both}.practice-result-ring-copy strong{font-size:clamp(35px,2.8vw,47px);line-height:1.2;letter-spacing:-1.5px}.practice-result-ring-copy span{font-size:22px;color:#5a79b0}.practice-result-spark{position:absolute;color:#78bfff;font-size:28px;line-height:1}.practice-result-spark--0{left:3%;top:9%}.practice-result-spark--1{right:-3%;top:42%}.practice-result-spark--2{right:8%;bottom:12%;font-size:24px}.practice-result-spark--3{left:7%;bottom:10%;font-size:18px}.practice-result-spark--4{left:-2%;top:24%;font-size:13px;color:#aad6ff}.practice-result-spark--5{left:0;bottom:22%;font-size:13px;color:#aad6ff}.practice-result-statistics{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}.practice-result-stat{height:174px;padding:15px 17px;border:1px solid var(--practice-result-line);border-radius:19px;background:#ffffff63;display:flex;flex-direction:column;align-items:flex-start}.practice-result-stat-icon{width:48px;height:48px;display:grid;place-items:center;border-radius:50%;background:#eaf4ff;color:#158aff;margin-bottom:10px}.practice-result-stat-icon svg{width:27px;height:27px}.practice-result-stat--warning .practice-result-stat-icon{color:#ee315a;background:#ffedf1}.practice-result-stat-label{color:#41629f;font-size:16px;line-height:1.12;min-height:35px}.practice-result-stat strong{font-size:36px;line-height:1.15;margin-top:6px;letter-spacing:-.8px;white-space:nowrap}.practice-result-celebration{position:relative;height:254px;align-self:center}.practice-result-mascot{position:absolute;width:110%;max-width:270px;height:auto;left:50%;top:54%;transform:translate(-50%,-50%);animation:practice-result-float 4s ease-in-out infinite;z-index:2}.practice-result-mascot-shadow{position:absolute;width:64%;height:20px;background:#c9e3ff;bottom:-1px;left:20%;border-radius:50%;animation:practice-result-shadow 4s ease-in-out infinite}.practice-result-confetti{position:absolute;inset:0}.practice-result-confetti i{position:absolute;width:9px;height:17px;background:#76caff;border-radius:3px;animation:practice-result-confetti 5s ease-in-out infinite;animation-delay:calc(var(--confetti-index) * -.37s)}.practice-result-confetti i:nth-child(1){left:1%;top:10%;transform:rotate(-40deg)}.practice-result-confetti i:nth-child(2){left:25%;top:2%;background:#ff78a2;transform:rotate(-35deg)}.practice-result-confetti i:nth-child(3){left:72%;top:2%;transform:rotate(30deg)}.practice-result-confetti i:nth-child(4){right:5%;top:12%;background:#ff91bb;transform:rotate(40deg)}.practice-result-confetti i:nth-child(5){right:-3%;top:42%;background:#389bff;transform:rotate(40deg)}.practice-result-confetti i:nth-child(6){left:7%;top:38%;background:#ffd055;transform:rotate(-55deg)}.practice-result-confetti i:nth-child(7){left:15%;bottom:4%;background:#ff97c1;transform:rotate(-25deg)}.practice-result-confetti i:nth-child(8){right:10%;bottom:14%;background:#ffd055;transform:rotate(35deg)}.practice-result-confetti i:nth-child(9){left:19%;top:21%;height:23px;width:6px;background:#ffd055;transform:rotate(-28deg)}.practice-result-confetti i:nth-child(10){left:15%;top:27%;height:17px;width:6px;background:#ffd055;transform:rotate(-60deg)}.practice-result-confetti i:nth-child(11){right:16%;top:34%;height:25px;width:6px;background:#ffd055;transform:rotate(48deg)}.practice-result-confetti i:nth-child(12){right:13%;top:41%;height:22px;width:6px;background:#ffd055;transform:rotate(75deg)}.practice-result-review{margin-top:20px;padding:18px 23px 24px;border:1px solid #fff;border-radius:23px;background:#ffffffab;animation:practice-result-enter .65s cubic-bezier(.22,1,.36,1) .12s both}.practice-result-review-heading{display:flex;align-items:flex-start;gap:18px;padding:0 7px 14px}.practice-result-review-icon{width:48px;height:48px;flex-shrink:0;display:grid;place-items:center;background:#ffedf1;color:#ec3158;border-radius:50%}.practice-result-review-icon svg{width:26px;height:26px}.practice-result-review-icon.is-success{background:#e0f8ee;color:#0cac87}.practice-result-review-heading h2{margin:6px 0 2px;font-size:28px;line-height:1.25;letter-spacing:-.8px}.practice-result-review-heading p{margin:0;color:var(--practice-result-muted);font-size:18px;line-height:1.4}.practice-result-notebook{display:flex;align-items:center;justify-content:center;gap:13px;margin-left:auto;margin-top:6px;min-height:49px;padding:0 20px;border-radius:28px;background:#e7f3ff;color:#1684ff!important;font-size:16px;white-space:nowrap;transition:background .2s,transform .2s}.practice-result-notebook svg{width:22px;height:22px}.practice-result-notebook svg:last-child{width:17px}.practice-result-notebook:hover{background:#d5eaff;transform:translateY(-2px)}.practice-result-review-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px 12px}.practice-result-review-grid--scroll{max-height:430px;overflow:auto;padding:3px}.practice-result-mistake{position:relative;display:flex;gap:16px;align-items:flex-start;min-height:114px;padding:15px 18px 12px 23px;border:1px solid var(--practice-result-line);border-radius:19px;background:#ffffff6b;animation:practice-result-enter .5s ease both;animation-delay:calc(.2s + var(--card-order) * .07s);transition:transform .22s,border-color .22s,box-shadow .22s}.practice-result-mistake:before{content:"";position:absolute;left:9px;top:15px;width:3px;height:39px;border-radius:3px;background:#f43d68}.practice-result-mistake:hover{transform:translateY(-3px);border-color:#93c7ff;box-shadow:0 8px 20px #429ff313}.practice-result-question-number{display:grid;place-items:center;min-width:57px;height:39px;border-radius:22px;background:#ffedf2;color:#f32c58;font-size:18px;font-weight:700}.practice-result-mistake-content{flex:1;min-width:0}.practice-result-mistake h3{margin:1px 0 9px;font-size:18px;line-height:1.2;letter-spacing:-.35px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.practice-result-answer-pair{display:grid;grid-template-columns:1fr 1fr;gap:16px}.practice-result-answer-pair>div{min-width:0}.practice-result-answer-pair>div+div{padding-left:17px;border-left:1px solid #deebfa}.practice-result-answer-pair>div>span{display:block;font-size:14px;line-height:1.2;margin-bottom:4px;color:#6d87b9}.practice-result-answer{display:inline-flex;max-width:100%;align-items:center;gap:10px;border-radius:30px;padding:5px 12px;font-size:14px;font-weight:400;line-height:1.25}.practice-result-answer>span{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.practice-result-answer svg{width:18px;height:18px;flex-shrink:0}.practice-result-answer--wrong{color:#f22b58;background:#ffedf2}.practice-result-answer--correct{color:#009b83;background:#dff8f1}.practice-result-card-arrow{display:grid;place-items:center;align-self:center;flex-shrink:0;width:45px;height:45px;border-radius:50%;background:#eaf4ff;color:#1684ff}.practice-result-card-arrow svg{width:22px;height:22px}.practice-result-actions{display:flex;align-items:center;justify-content:flex-end;gap:17px;padding:12px 6px 0 78px}.practice-result-actions--wide{grid-column:1/-1;padding-left:0}.practice-result-actions a{display:flex;align-items:center;justify-content:center;gap:17px;min-height:68px;flex:1;max-width:333px;border-radius:40px;font-weight:600;font-size:18px;transition:transform .2s,filter .2s,background .2s}.practice-result-actions svg{width:24px;height:24px;flex-shrink:0}.practice-result-back{background:#e0f0ff;border:1px solid white;color:#1684ff!important}.practice-result-primary{color:#fff!important;background:linear-gradient(135deg,#258dff,#1981f6);box-shadow:0 9px 20px #298dff20}.practice-result-primary svg{margin-left:15px}.practice-result-actions a:hover{transform:translateY(-2px);filter:brightness(1.04)}.practice-result-back:hover{background:#d3eaff}.practice-result-perfect{grid-column:1/-1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;min-height:224px;border:1px solid var(--practice-result-line);border-radius:19px;background:#f4fbff}.practice-result-perfect svg{width:48px;height:48px;color:#0eac89}.practice-result-perfect strong{font-size:23px}.practice-result-perfect span{color:var(--practice-result-muted)}.practice-result-floating{position:fixed;right:0;bottom:80px;display:grid;gap:8px;z-index:35}.practice-result-floating button{display:flex;flex-direction:column;justify-content:center;align-items:center;gap:4px;width:65px;height:99px;border:1px solid #d5eaff;background:#ffffffed;border-radius:40px;color:#1d4894;font-size:12px;line-height:1.3;transition:transform .2s,box-shadow .2s}.practice-result-floating img{width:34px;height:40px}.practice-result-floating svg{width:30px;height:30px;color:#1684ff}.practice-result-floating button:hover{transform:scale(1.035);box-shadow:0 0 18px #61b8ff30}body:has(.practice-summary-page) .aqua-memo-launcher{display:none}body:has(.practice-summary-page) .aqua-chat__launcher{bottom:14px;right:15px}@keyframes practice-result-enter{0%{opacity:0;translate:0 12px}to{opacity:1;translate:0 0}}@keyframes practice-result-number{0%{opacity:0}to{opacity:1}}@keyframes practice-result-ring-draw{to{stroke-dashoffset:0}}@keyframes practice-result-ring-settle{to{opacity:0}}@keyframes practice-result-ring-progress{to{stroke-dashoffset:calc(100 - var(--ring-progress))}}@keyframes practice-result-float{0%,to{transform:translate(-50%,-50%)}50%{transform:translate(-50%,calc(-50% - 7px))}}@keyframes practice-result-shadow{0%,to{opacity:.8;scale:1}50%{opacity:.55;scale:.93}}@keyframes practice-result-confetti{0%,to{translate:0 0}50%{translate:2px -5px}}@media(max-width:1450px){.practice-result-hero{grid-template-columns:minmax(0,1.65fr) minmax(160px,.85fr) minmax(275px,1.4fr) minmax(190px,.95fr);padding:24px;min-height:280px;gap:13px}.practice-result-description{font-size:18px}.practice-result-stat{padding:14px 12px;height:165px}.practice-result-stat strong{font-size:32px}.practice-result-stat-label{font-size:15px}.practice-result-celebration{height:235px}.practice-result-review-heading h2{font-size:26px}.practice-result-review-heading p{font-size:16px}.practice-result-mistake{gap:12px;min-height:110px;padding-right:13px}.practice-result-mistake h3{font-size:17px}.practice-result-answer-pair{gap:8px}.practice-result-answer-pair>div+div{padding-left:10px}.practice-result-answer{padding:5px 9px;gap:6px;font-size:13px}.practice-result-actions{padding-left:24px}.practice-result-actions a{font-size:16px;gap:10px;min-height:62px}}@media(min-width:1100px)and (max-height:800px){.practice-result-hero{min-height:250px;padding-top:18px;padding-bottom:18px}.practice-result-celebration{height:208px}.practice-result-ring{max-width:218px}.practice-result-description{font-size:17px;margin:10px 0 12px}.practice-result-topics{min-height:63px}.practice-result-topic-icon{width:42px;height:42px}.practice-result-review{margin-top:16px;padding:15px 20px 18px}.practice-result-review-heading{padding-bottom:13px}.practice-result-mistake{min-height:98px;padding-top:12px;padding-bottom:10px}.practice-result-mistake h3{margin-bottom:6px}.practice-result-actions a{min-height:57px}.practice-result-review-heading h2{font-size:25px}.practice-result-stat{height:158px}.practice-result-floating{bottom:75px}}@media(max-width:1150px){.practice-summary-page{padding-inline:24px}.practice-result-hero{grid-template-columns:minmax(0,1.6fr) minmax(155px,.8fr) minmax(255px,1.2fr);gap:18px}.practice-result-celebration{display:none}.practice-result-intro h1{font-size:32px}.practice-result-topics div>span{font-size:13px}.practice-result-description{font-size:17px}.practice-result-notebook{padding:0 15px;font-size:14px}.practice-result-review-heading{gap:12px}.practice-result-mistake{gap:10px;padding-left:19px}.practice-result-question-number{min-width:45px;font-size:16px}.practice-result-card-arrow{width:34px;height:34px}.practice-result-answer-pair{grid-template-columns:1fr;gap:5px}.practice-result-answer-pair>div{display:flex;gap:8px;align-items:center}.practice-result-answer-pair>div+div{border:0;padding:0}.practice-result-answer-pair>div>span{min-width:88px;margin:0;font-size:12px}.practice-result-floating{right:0}.practice-result-floating button{width:51px;height:84px}}@media(max-width:800px){.practice-result-hero{grid-template-columns:1fr 1fr;padding:22px;gap:20px}.practice-result-intro{grid-column:1/-1}.practice-result-intro h1{white-space:normal;font-size:34px}.practice-result-description{max-width:none}.practice-result-statistics{grid-template-columns:1fr}.practice-result-stat{height:auto;min-height:75px;display:grid;grid-template-columns:36px 1fr auto;align-items:center;gap:10px;padding:10px}.practice-result-stat-icon{width:34px;height:34px;margin:0}.practice-result-stat-icon svg{width:22px;height:22px}.practice-result-stat-label{min-height:0;font-size:13px}.practice-result-stat strong{font-size:22px;margin:0}.practice-result-review-heading{flex-wrap:wrap}.practice-result-review-heading>div{flex:1}.practice-result-review-heading h2{font-size:23px}.practice-result-notebook{margin-left:60px;min-height:42px}.practice-result-review-grid{grid-template-columns:1fr}.practice-result-review{padding:18px 14px}.practice-result-answer-pair{grid-template-columns:1fr 1fr}.practice-result-answer-pair>div{display:block}.practice-result-answer-pair>div+div{border-left:1px solid var(--practice-result-line);padding-left:10px}.practice-result-answer-pair>div>span{margin-bottom:4px}.practice-result-actions,.practice-result-actions--wide{grid-column:1/-1;padding:12px 0 0;gap:10px}.practice-result-actions a{font-size:14px;min-height:53px;gap:6px}.practice-result-primary svg{margin:0}.practice-result-floating{bottom:83px}.practice-result-floating button{width:43px;height:72px;font-size:10px}.practice-result-floating img{width:27px;height:30px}.practice-result-floating svg{width:25px;height:25px}}@media(prefers-reduced-motion:reduce){.practice-summary-page *,.practice-summary-page *:before{animation:none!important;transition:none!important}.practice-result-ring-draw{stroke-dashoffset:0;opacity:0}.practice-result-ring-progress{stroke-dashoffset:calc(100 - var(--ring-progress))}.practice-result-mistake:hover,.practice-result-actions a:hover,.practice-result-notebook:hover,.practice-result-floating button:hover{transform:none}}@media(min-width:1451px){.practice-result-intro,.practice-result-statistics{translate:0 6px}.practice-result-intro h1{font-size:48px}}@media(min-width:1100px)and (max-height:800px){.practice-result-perfect{min-height:165px}.practice-result-review-heading p{font-size:15px}.practice-result-review-heading h2{margin-top:3px}}@media(min-width:1100px)and (max-height:800px){.practice-summary-page{padding-bottom:16px}.practice-result-hero{min-height:230px;padding-top:14px;padding-bottom:14px}.practice-result-intro h1{font-size:34px}.practice-result-eyebrow{margin-bottom:8px}.practice-result-description{font-size:16px;margin:9px 0 12px}.practice-result-topics{min-height:57px;padding-block:8px}.practice-result-ring{max-width:190px}.practice-result-stat{height:145px}.practice-result-mistake{min-height:88px;padding-top:10px;padding-bottom:9px}.practice-result-mistake h3{font-size:16px;margin-bottom:5px}.practice-result-answer-pair>div>span{font-size:12px}.practice-result-answer{padding-block:4px}.practice-result-review-heading p{font-size:14px}.practice-result-review-heading h2{font-size:24px}.practice-result-celebration{height:195px}.practice-result-review{padding-bottom:15px}.practice-result-review-grid{gap:9px 12px}}.practice-summary-page{padding-top:24px}.paper-preview-page{min-height:100dvh;color:#163154;background:linear-gradient(180deg,#f8fbff,#fff 42%)}.paper-preview-nav{position:sticky;top:0;z-index:20;display:grid;grid-template-columns:auto auto minmax(0,1fr) auto;align-items:center;gap:14px;min-height:72px;padding:0 clamp(20px,4vw,58px);border-bottom:1px solid #dce7f5;background:#ffffffed;-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px)}.paper-preview-nav .syllabus-brand{display:flex;align-items:center;gap:7px;color:#10234a;font-size:23px;font-weight:850;letter-spacing:-.05em;text-decoration:none}.paper-preview-nav .syllabus-brand img{width:38px;height:48px;object-fit:contain}.paper-preview-nav .syllabus-course{border:0;border-left:1px solid #d6e1ef;padding:2px 0 2px 14px;color:#577092;background:none;font:inherit;font-weight:650}.paper-preview-nav nav{justify-self:center;display:flex;gap:15px}.paper-preview-nav nav a,.paper-preview-nav nav span{padding:8px 10px;color:#5c7091;font-size:.9rem;font-weight:760;text-decoration:none}.paper-preview-nav nav span{color:#2476ed;border-bottom:3px solid #317ff1}.preview-dev-label{justify-self:end;color:#2678ed;border:1px solid #cde1fb;border-radius:999px;padding:6px 10px;background:#eff7ff;font-size:.72rem;font-weight:800}.paper-preview-layout{width:min(1440px,calc(100% - 48px));margin:0 auto;display:grid;grid-template-columns:250px minmax(390px,1fr) 330px;gap:20px;padding:30px 0 52px}.preview-sidebar,.preview-list-panel,.preview-detail-card,.preview-paper-card,.preview-tutor{border:1px solid #dbe7f5;border-radius:16px;background:#ffffffeb;box-shadow:0 10px 28px #214a7f0b}.preview-sidebar{position:sticky;top:94px;align-self:start;display:grid;gap:20px;padding:20px}.preview-eyebrow{margin:0 0 6px;color:#2877e9;font-size:.72rem;font-weight:850;letter-spacing:.04em;text-transform:uppercase}.preview-sidebar h1{margin:0;font-size:1.45rem;letter-spacing:-.04em}.preview-sidebar>div>p:not(.preview-eyebrow){margin:7px 0 0;color:#66809f;font-size:.8rem;line-height:1.45}.preview-paper-card{display:flex;gap:10px;padding:12px;border-color:#d5e8fe;background:#f4f9ff}.preview-paper-card svg{flex:0 0 auto;color:#2c7de7}.preview-paper-card strong,.preview-paper-card span{display:block}.preview-paper-card strong{font-size:.79rem}.preview-paper-card span{margin-top:3px;color:#69809d;font-size:.69rem}.preview-sidebar h2{margin:0 0 9px;font-size:.84rem}.preview-filter-list{display:grid;gap:4px}.preview-filter-list button{display:flex;align-items:center;justify-content:space-between;width:100%;padding:9px 8px;color:#3b587c;border:1px solid transparent;border-radius:9px;background:transparent;font:inherit;font-size:.78rem;text-align:left;cursor:pointer;transition:background .18s,border-color .18s,transform .18s}.preview-filter-list button:hover{border-color:#d8e8fb;background:#f4f9ff}.preview-filter-list button:active{transform:scale(.985)}.preview-filter-list button.active{color:#1973e7;border-color:#cfe4fe;background:#eef6ff;box-shadow:inset 3px 0 #3180ef}.preview-filter-list b{font-size:.7rem}.preview-tutor{display:grid;grid-template-columns:46px 1fr;gap:7px;padding:10px;border:0;background:linear-gradient(135deg,#eaf5ff,#f7fbff)}.preview-tutor img{width:43px;height:52px;object-fit:contain}.preview-tutor p{margin:0;color:#42607f;font-size:.7rem;line-height:1.45}.preview-tutor b{display:block;color:#2877e9}.preview-list-panel{overflow:hidden}.preview-list-panel>header{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:18px;border-bottom:1px solid #e3ecf6}.preview-list-panel h2{margin:0;color:#193455;font-size:1rem}.preview-search{display:flex;align-items:center;gap:7px;width:min(260px,50%);min-height:38px;padding:0 10px;color:#64809d;border:1px solid #d4e1f0;border-radius:9px;background:#fff}.preview-search:focus-within{border-color:#2f80ee;box-shadow:0 0 0 3px #2f80ee24}.preview-search input{width:100%;border:0;outline:0;color:#254668;background:transparent;font:inherit;font-size:.76rem}.preview-list{max-height:calc(100dvh - 160px);overflow:auto}.preview-list>button{display:grid;grid-template-columns:20px 36px minmax(0,1fr) auto;align-items:center;gap:9px;width:100%;padding:13px 16px;color:#1d385d;border:0;border-bottom:1px solid #e7eef7;background:#fff;text-align:left;cursor:pointer;transition:background .18s}.preview-list>button:hover{background:#f5faff}.preview-list>button.active{background:#eef6ff;box-shadow:inset 3px 0 #3180ef}.record-status{display:grid;place-items:center}.record-status.ready{color:#2cb878}.record-status.needs-options,.record-status.unmapped{color:#ef9a31}.record-status.has-diagram{color:#538fe2}.record-number{font-size:.76rem;font-weight:850}.record-copy{min-width:0}.record-copy strong,.record-copy small{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.record-copy strong{font-size:.78rem}.record-copy small{margin-top:3px;color:#7489a4;font-size:.68rem}.record-pill{color:#5c7597;border:1px solid #d8e6f5;border-radius:999px;padding:4px 7px;font-size:.64rem;font-weight:760}.preview-detail{align-self:start;position:sticky;top:94px;display:grid;gap:12px}.preview-detail-heading{padding:5px 4px}.preview-detail-heading h2{margin:0;color:#173255;font-size:1.18rem}.preview-detail-heading span{display:block;margin-top:5px;color:#7187a2;font-size:.72rem;line-height:1.35}.preview-detail-card{padding:16px}.detail-prompt{margin:0;color:#234365;font-size:.84rem;line-height:1.55}.detail-options{display:grid;gap:7px;margin:16px 0 0;padding:0;list-style:none}.detail-options li{display:grid;grid-template-columns:23px 1fr auto;align-items:start;gap:7px;padding:9px;color:#4c6788;border:1px solid #dde8f4;border-radius:9px;font-size:.76rem;line-height:1.4}.detail-options li.correct{color:#17734f;border-color:#a9e1c6;background:#f0fbf5}.detail-options b{display:grid;place-items:center;width:21px;height:21px;color:#2776df;border-radius:6px;background:#eef6ff;font-size:.7rem}.detail-options li.correct b{color:#18744f;background:#d9f5e5}.detail-options svg{color:#24a568}.detail-meta h3{margin:0 0 10px;color:#2b4b71;font-size:.8rem}.detail-meta p{display:grid;gap:3px;margin:0 0 10px;color:#69809d;font-size:.72rem;line-height:1.4}.detail-meta p:last-child{margin-bottom:0}.detail-meta b{color:#355474;font-size:.68rem;text-transform:uppercase;letter-spacing:.035em}.review-callout{display:flex;gap:8px;margin-top:15px;padding:10px;color:#9a5b12;border:1px solid #f0d6a3;border-radius:9px;background:#fff8e9;font-size:.74rem;line-height:1.4}.review-callout svg{flex:0 0 auto}.review-callout b{display:block}.source-reference{display:inline-block;margin-top:11px;color:#2877e9;font-size:.72rem;font-weight:760;text-decoration:none}.preview-empty{display:grid;justify-items:center;gap:8px;padding:34px 18px;color:#6d84a1;text-align:center;font-size:.8rem}.preview-empty svg{color:#8ba4c1}.preview-empty button{color:#2877e9;border:0;background:transparent;font:inherit;font-weight:800;cursor:pointer}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}@media(max-width:1120px){.paper-preview-layout{grid-template-columns:220px minmax(330px,1fr);width:min(100% - 32px,1000px)}.preview-detail{position:static;grid-column:span 2;grid-template-columns:repeat(2,minmax(0,1fr))}.preview-detail-heading{grid-column:span 2}.preview-detail-card:first-of-type{grid-column:span 2}}@media(max-width:700px){.paper-preview-nav{grid-template-columns:auto 1fr;min-height:62px;padding:0 14px}.paper-preview-nav .syllabus-brand{font-size:20px}.paper-preview-nav .syllabus-brand img{width:31px;height:42px}.paper-preview-nav .syllabus-course,.paper-preview-nav nav span,.preview-dev-label{display:none}.paper-preview-nav nav{justify-self:end;gap:0}.paper-preview-nav nav a{padding:8px;font-size:.78rem}.paper-preview-layout{grid-template-columns:1fr;width:min(100% - 24px,620px);padding-top:20px}.preview-sidebar{position:static}.preview-list-panel>header{align-items:flex-start;flex-direction:column}.preview-search{width:100%}.preview-list{max-height:none}.preview-list>button{grid-template-columns:18px 32px minmax(0,1fr)}.record-pill{display:none}.preview-detail{position:static;grid-column:auto;grid-template-columns:1fr}.preview-detail-heading,.preview-detail-card:first-of-type{grid-column:auto}}@media(prefers-reduced-motion:reduce){.preview-filter-list button,.preview-list>button{transition:none}}.original-paper-page{display:block;width:100%;height:auto;border:1px solid #dbe7f5;border-radius:8px}.region-note{margin:10px 0 0;color:#607996;font-size:.72rem;line-height:1.4}.editor-paper-select{display:grid;gap:6px;margin:18px 0;color:#587290;font-size:12px;font-weight:700}.editor-paper-select select{width:100%;padding:10px;border:1px solid #dbe7f5;border-radius:9px;background:#fff;color:#183153;font:inherit}.editor-image-card{display:grid;gap:12px}.editor-crop-frame{height:360px;overflow:hidden;border:1px solid #dbe7f5;border-radius:10px;background:#f4f8fc;display:grid;place-items:center}.editor-crop-frame img{width:100%;height:100%;object-fit:contain;transform-origin:center;transition:transform .15s}.editor-controls{display:grid;grid-template-columns:1fr 1fr auto;align-items:end;gap:10px}.editor-controls label{display:grid;gap:5px;color:#587290;font-size:11px;font-weight:700}.editor-controls input{width:100%}.editor-save{min-height:36px;padding:0 13px;border:1px solid #287cf0;border-radius:8px;background:#287cf0;color:#fff;font:inherit;font-size:12px;font-weight:800;cursor:pointer}.editor-controls small{color:#18744f;font-size:11px}.editor-form{display:grid;gap:14px}.editor-form>label{display:grid;gap:6px;color:#183153;font-size:12px;font-weight:800}.editor-form textarea{width:100%;padding:10px;border:1px solid #d5e2ef;border-radius:8px;color:#183153;font:inherit;line-height:1.5;resize:vertical}.editor-options{display:grid;gap:8px}.editor-options label{display:grid;grid-template-columns:28px 1fr;gap:8px;align-items:center}.editor-options span{display:grid;place-items:center;width:26px;height:26px;border-radius:6px;background:#edf4fc;color:#2877e9;font-weight:800}.editor-options input{padding:8px;border:1px solid #d5e2ef;border-radius:7px;font:inherit;color:#183153}.paper-editor-sequential{min-height:100dvh;background:#f6faff;color:#173255}.editor-topbar{position:sticky;top:0;z-index:5;display:flex;align-items:center;gap:22px;min-height:68px;padding:0 28px;border-bottom:1px solid #dbe7f5;background:#fff}.editor-topbar a{color:#2877e9;text-decoration:none;font-weight:800}.editor-topbar strong{font-size:17px}.editor-topbar label{display:flex;align-items:center;gap:7px;margin-left:auto;color:#607996;font-size:12px;font-weight:700}.editor-topbar select{padding:8px 10px;border:1px solid #d5e2ef;border-radius:8px;background:#fff;color:#173255}.editor-topbar>span{color:#607996;font-size:12px}.editor-workspace{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:18px;width:min(1500px,calc(100% - 36px));margin:18px auto}.editor-source-panel,.editor-edit-panel{min-width:0;padding:18px;border:1px solid #dbe7f5;border-radius:14px;background:#fff;box-shadow:0 8px 24px #1b5b9408}.editor-source-panel>header,.editor-edit-panel>header{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}.editor-source-panel h2,.editor-edit-panel h2{margin:0;font-size:18px}.editor-source-panel header span,.editor-status{color:#6a829e;font-size:12px;font-weight:700}.editor-source-scroll{height:calc(100dvh - 150px);min-height:560px;overflow:auto;border:1px solid #dbe7f5;border-radius:9px;background:#eef4fa;text-align:center}.editor-source-scroll img{display:block;width:100%;min-height:100%;object-fit:contain}.editor-source-panel>p{margin:10px 0 0;color:#6a829e;font-size:11px}.editor-edit-panel{display:grid;align-content:start;gap:14px}.editor-crop-stage{position:relative;height:360px;overflow:hidden;border:1px solid #c8d9eb;border-radius:10px;background:#e9f2fb}.editor-crop-viewport{position:absolute;overflow:hidden;border:2px solid #287cf0;background:#fff;box-shadow:0 0 0 9999px #15365a33}.editor-crop-viewport img{width:100%;height:100%;object-fit:contain}.editor-slider-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:9px}.editor-slider-grid label{display:grid;gap:5px;color:#587290;font-size:11px;font-weight:750}.editor-slider-grid input{width:100%}.editor-stem-field{display:grid;gap:6px;color:#173255;font-size:12px;font-weight:800}.editor-stem-field textarea{width:100%;padding:10px;border:1px solid #d5e2ef;border-radius:8px;color:#173255;font:inherit;line-height:1.45;resize:vertical}.editor-option-fields{display:grid;gap:8px}.editor-option-fields label{display:grid;grid-template-columns:25px 1fr;gap:8px;align-items:center}.editor-option-fields b{display:grid;place-items:center;width:24px;height:24px;border-radius:6px;background:#edf4fc;color:#2877e9}.editor-option-fields input{padding:8px;border:1px solid #d5e2ef;border-radius:7px;font:inherit}.editor-actions{display:flex;align-items:center;gap:8px;flex-wrap:wrap;padding-top:8px;border-top:1px solid #e3ecf6}.editor-actions button{min-height:36px;padding:0 11px;border:1px solid #d5e2ef;border-radius:8px;background:#fff;color:#2870c8;font:inherit;font-size:11px;font-weight:800;cursor:pointer}.editor-actions .editor-save{background:#287cf0;border-color:#287cf0;color:#fff}.editor-actions button:disabled{opacity:.45;cursor:not-allowed}.editor-actions small{color:#19734f;font-size:11px}@media(max-width:900px){.editor-workspace{grid-template-columns:1fr}.editor-source-scroll{height:480px;min-height:0}.editor-topbar{flex-wrap:wrap;padding:10px 16px}.editor-topbar label{margin-left:0}}.editor-stage-image{position:absolute;inset:0;width:100%;height:100%;object-fit:contain}.editor-crop-viewport{display:grid;place-items:center;background:transparent}.editor-crop-viewport span{padding:6px 9px;border-radius:6px;background:#287cf0;color:#fff;font-size:11px;font-weight:800;box-shadow:0 2px 8px #15365a55}.editor-crop-viewport{touch-action:none}.crop-drag-label{cursor:move}.crop-handle,.crop-edge{position:absolute;z-index:2;border:0;background:#fff;box-shadow:0 1px 5px #15365a66}.crop-handle{width:14px;height:14px;border:2px solid #287cf0;border-radius:3px}.crop-nw{left:-8px;top:-8px;cursor:nwse-resize}.crop-ne{right:-8px;top:-8px;cursor:nesw-resize}.crop-sw{left:-8px;bottom:-8px;cursor:nesw-resize}.crop-se{right:-8px;bottom:-8px;cursor:nwse-resize}.crop-edge{width:8px;height:32px;padding:0;background:#287cf0;border-radius:4px}.crop-e{right:-5px;top:calc(50% - 16px);cursor:ew-resize}.crop-w{left:-5px;top:calc(50% - 16px);cursor:ew-resize}.crop-edge.crop-n,.crop-edge.crop-s{width:32px;height:8px;left:calc(50% - 16px);top:-5px;cursor:ns-resize}.crop-edge.crop-s{top:auto;bottom:-5px}.editor-auto-actions{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.editor-auto-actions button,.editor-auto-paper{min-height:32px;padding:0 10px;border:1px solid #bcd7f4;border-radius:7px;background:#eef6ff;color:#2870c8;font:inherit;font-size:11px;font-weight:800;cursor:pointer}.editor-auto-actions span{color:#65809f;font-size:11px}.editor-auto-paper{margin-left:auto;background:#287cf0;border-color:#287cf0;color:#fff;text-decoration:none;display:inline-flex;align-items:center}.inventory-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px;width:min(1400px,calc(100% - 36px));margin:18px auto;padding-bottom:40px}.inventory-card{padding:14px;border:1px solid #dbe7f5;border-radius:12px;background:#fff}.inventory-card header{display:flex;justify-content:space-between;gap:8px;margin-bottom:10px;color:#173255}.inventory-card header span{color:#2877e9;font-size:11px;font-weight:700}.inventory-card img{display:block;width:100%;height:180px;object-fit:contain;border:1px solid #e1eaf4;border-radius:8px;background:#f4f8fc}.inventory-card dl{display:grid;gap:6px;margin:10px 0 0}.inventory-card dl div{display:flex;justify-content:space-between;color:#68809d;font-size:11px}.inventory-card dd{margin:0;color:#24476e;font-weight:700}.inventory-summary{display:flex;gap:10px;flex-wrap:wrap;width:min(1400px,calc(100% - 36px));margin:18px auto 0}.inventory-summary span{padding:8px 12px;border:1px solid #dbe7f5;border-radius:9px;background:#fff;color:#617b9a;font-size:12px}.inventory-summary b{color:#173255}.inventory-card--needs-review{border-color:#f1c981}.inventory-card--skipped{opacity:.68}.inventory-reason{margin:10px 0 0;padding-top:9px;border-top:1px solid #e7eef7;color:#9a6321;font-size:11px;line-height:1.45}.inventory-note{width:min(1400px,calc(100% - 36px));margin:18px auto 0;padding:10px 12px;border:1px solid #cfe1f7;border-radius:9px;background:#f7fbff;color:#426385;font-size:12px}.inventory-note+.inventory-summary{margin-top:10px}.editor-applied-crops{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:10px;margin:12px 0 14px}.editor-applied-crop{margin:0;padding:10px;border:1px solid #cfe1f7;border-radius:10px;background:#f8fbff}.editor-applied-crop figcaption,.editor-adjust-label{margin:0 0 8px;color:#55718f;font-size:11px;font-weight:800;text-transform:uppercase;letter-spacing:.04em}.editor-applied-crop img{display:block;max-width:100%;width:auto;max-height:230px;margin:auto;object-fit:contain}.editor-adjust-label{margin-top:4px}.editor-audit-warning{margin:10px 0;padding:9px 11px;border:1px solid #f0c77e;border-radius:8px;background:#fff8ec;color:#875b18;font-size:11px;line-height:1.45}.paper-demo{min-height:100dvh;background:#f7fbff;color:#173255;padding:32px}.paper-demo>header,.paper-demo>section{width:min(900px,100%);margin-inline:auto}.paper-demo>header{display:flex;align-items:center;justify-content:space-between;color:#587394;font-size:.9rem}.paper-demo a{color:#2877e9;text-decoration:none;font-weight:800}.paper-demo>section{margin-top:26px;padding:32px;border:1px solid #dbe7f5;border-radius:18px;background:#fff;box-shadow:0 12px 28px #1b5b9410}.paper-demo h1{margin:6px 0 18px;font-size:clamp(1.25rem,3vw,1.75rem)}.paper-meta{display:flex;align-items:center;justify-content:space-between;gap:12px}.paper-meta p,.eyebrow{margin:0;color:#2877e9;font-weight:800}.paper-meta span{border-radius:999px;background:#edf6ff;padding:5px 10px;color:#2877e9;font-size:.8rem;font-weight:800}.question-progress{height:5px;overflow:hidden;border-radius:999px;background:#eaf1f8;margin:18px 0 28px}.question-progress span{display:block;height:100%;border-radius:inherit;background:#2d7df4;transition:width .2s ease}.native-question-paper{display:grid;grid-template-columns:44px minmax(0,1fr);gap:16px;padding:24px;border:1px solid #dbe7f5;border-radius:14px;background:#fff;color:#202c38;font-family:Arial,Helvetica,sans-serif}.paper-question-number{font-size:1.25rem;font-weight:700}.paper-question-content{min-width:0}.native-question-text{margin:0 0 18px;font-size:1.03rem;line-height:1.55}.native-question-text:last-child{margin-bottom:0}.native-diagram{display:block;width:min(100%,660px);height:auto;margin:20px auto;color:#252a31}.diagram-surface{fill:#d1d3d6}.diagram-object{fill:#fff;stroke:#252a31;stroke-width:3}.diagram-force{stroke:#252a31;stroke-width:2.7}.force-diagram marker path{fill:#252a31}.force-diagram text{font-size:23px;fill:#252a31}.wave-axis,.wave-measure{stroke:#252a31;stroke-width:2}.wave-line{fill:none;stroke:#2569c9;stroke-width:3}.wave-diagram text{font-size:20px;fill:#252a31;font-weight:700}.native-table-wrap{overflow-x:auto;margin:18px 0}.native-question-table{width:min(100%,480px);margin:auto;border-collapse:collapse;text-align:center;font-size:1rem}.native-question-table th,.native-question-table td{border:1.5px solid #292f36;padding:9px 14px}.native-question-table th{background:#f3f4f5;font-weight:700}.answer-panel{margin-top:28px;padding-top:26px;border-top:1px solid #e1ebf5}.answer-panel h2{margin:0 0 16px;font-size:1.1rem}.answers{display:grid;gap:10px;margin:0}.answers button{display:grid;grid-template-columns:34px 1fr;align-items:center;gap:11px;min-height:54px;padding:9px 14px;border:1px solid #cfe0f4;border-radius:10px;background:#fff;color:#294b70;text-align:left;font:inherit;cursor:pointer;transition:transform .16s ease,border-color .16s ease,background .16s ease,box-shadow .16s ease}.answers button:hover:not(:disabled){border-color:#67a4f6;box-shadow:0 5px 14px #1b5b9412}.answers button:active:not(:disabled){transform:scale(.99)}.answers button:focus-visible,.submit:focus-visible,.qa-fill:focus-visible{outline:3px solid #96c4ff;outline-offset:3px}.answers button strong{display:grid;place-items:center;width:28px;height:28px;border-radius:7px;background:#edf4fc;color:#2877e9}.answers .selected{border-color:#277bf0;background:#edf6ff}.answers .selected strong{background:#2877e9;color:#fff}.answer-actions{display:flex;align-items:center;gap:12px;margin-top:20px}.submit,.qa-fill{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:44px;padding:0 18px;border:1px solid #277bf0;border-radius:10px;background:#287cf0;color:#fff;font:inherit;font-weight:850;cursor:pointer;transition:transform .16s ease,box-shadow .16s ease}.submit:hover:not(:disabled),.qa-fill:hover{box-shadow:0 6px 16px #1d73df36}.submit:active:not(:disabled),.qa-fill:active{transform:scale(.98)}.submit:disabled{color:#91a4ba;border-color:#dbe6f2;background:#eaf0f6;cursor:not-allowed}.qa-fill{border-color:#cfe0f4;background:#fff;color:#2569c9}.feedback{display:grid;grid-template-columns:auto 1fr auto;gap:12px;align-items:start;margin-top:20px;padding:18px;border-radius:12px}.feedback>svg{font-size:26px}.feedback p{margin:6px 0;color:#416080;font-size:.92rem;line-height:1.5}.feedback.correct{background:#effbf5;color:#19734f}.feedback.wrong{background:#fff6ed;color:#a35e10}.official-mark-scheme{margin-top:12px;padding-top:12px;border-top:1px solid #cce8d9}.official-mark-scheme span{font-size:.78rem;font-weight:850;text-transform:uppercase;letter-spacing:.04em}.official-mark-scheme p{margin-bottom:0}.practice-result{text-align:center}.result-score{margin:20px auto;width:130px;height:130px;display:grid;place-items:center;border:7px solid #76b4fb;border-radius:50%;font-size:1.7rem;font-weight:900;color:#2877e9}.practice-result>.submit{margin-inline:auto}@media(max-width:600px){.paper-demo{padding:18px}.paper-demo>header{gap:12px;align-items:flex-start;flex-direction:column}.paper-demo>section{padding:20px}.native-question-paper{grid-template-columns:32px minmax(0,1fr);gap:10px;padding:16px}.feedback{grid-template-columns:auto 1fr}.feedback .submit{grid-column:span 2;width:100%}.answer-actions{align-items:stretch;flex-direction:column}.answer-actions .submit,.answer-actions .qa-fill{width:100%}}.past-paper-archive{min-height:100dvh;background:#fafdff;color:var(--color-home-ink,#173055)}.archive-nav{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:68px;padding:0 28px;border-bottom:1px solid var(--color-home-line,#dbe7f5);background:#fffffff0;-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px)}.archive-nav a,.archive-nav span{display:inline-flex;align-items:center;gap:7px;color:var(--color-home-muted,#577092);font-size:13px;font-weight:700;text-decoration:none}.archive-nav a:first-child{color:var(--color-home-ink,#173055)}.archive-nav a:hover{color:var(--color-home-accent-hover,#247fc4)}.archive-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:24px;width:min(1160px,calc(100% - 48px));margin:0 auto;padding:34px 0 72px}.archive-main{min-width:0}.archive-eyebrow{margin:0 0 6px;color:var(--color-home-accent-hover,#247fc4);font-size:13px;font-weight:700}.archive-main h1{margin:4px 0;font:700 clamp(32px,3.2vw,44px)/1.05 var(--font-display);letter-spacing:-.045em}.archive-intro{max-width:620px;margin:0;color:var(--color-home-muted,#597093);font-size:14px;line-height:1.5}.archive-year{display:inline-flex;align-items:baseline;gap:10px;margin-top:24px;padding:10px 14px;border:1px solid var(--color-home-line,#dbe7f5);border-radius:12px;background:#fff}.archive-year span{color:var(--color-home-muted,#577092);font-size:11px}.archive-year strong{font:700 19px/1 var(--font-display)}.archive-series{margin-top:26px}.archive-series h2,.archive-papers h2{margin:0;font:700 17px/1.25 var(--font-display)}.archive-series>div{display:flex;flex-wrap:wrap;gap:8px;margin-top:11px}.archive-series button{display:grid;gap:3px;padding:10px 13px;border:1px solid var(--color-home-line,#dbe7f5);border-radius:11px;background:#fff;color:var(--color-home-ink,#173055);font:inherit;font-size:12px;font-weight:700;text-align:left;cursor:pointer;transition:background .18s,border-color .18s,transform .16s}.archive-series button:hover{border-color:var(--color-home-line-strong,#acd0ee);background:#f7fbff}.archive-series button:active{transform:scale(.98)}.archive-series button.is-selected{border-color:var(--color-home-accent,#5db7ff);background:var(--color-home-accent-soft,#eaf6ff);color:var(--color-home-accent-hover,#247fc4)}.archive-series small{color:var(--color-home-muted,#69809d);font-size:10px;font-weight:500}.archive-papers{margin-top:30px}.archive-papers>header{display:flex;align-items:end;justify-content:space-between;gap:14px;margin-bottom:11px}.archive-papers>header p{margin:4px 0 0;color:var(--color-home-muted,#69809d);font-size:11px}.archive-papers>header>span{color:var(--color-home-muted,#69809d);font-size:11px}.paper-card-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.archive-paper-card{padding:16px;border:1px solid var(--color-home-line,#dbe7f5);border-radius:14px;background:#fff;box-shadow:0 8px 24px #103b700b}.archive-paper-card header{display:flex;align-items:flex-start;justify-content:space-between;gap:10px}.paper-code{color:var(--color-home-accent-hover,#247fc4);font-size:10px;font-weight:800;letter-spacing:.04em}.archive-paper-card h3{margin:4px 0 0;font:700 15px/1.25 var(--font-display)}.paper-status{display:inline-flex;align-items:center;gap:4px;white-space:nowrap;font-size:9px;font-weight:800;letter-spacing:.04em}.status-ready{color:#137555}.status-needs-review,.status-processing{color:#a36b12}.paper-type{margin:10px 0;color:#496684;font-size:11px}.archive-paper-card dl{display:grid;gap:7px;margin:12px 0 15px;padding-top:11px;border-top:1px solid #edf2f7}.archive-paper-card dl div{display:flex;justify-content:space-between;align-items:center;gap:10px;color:#69809d;font-size:10px}.archive-paper-card dt{display:inline-flex;align-items:center;gap:5px}.archive-paper-card dd{margin:0;color:#2c4d72;text-align:right;font-weight:700}.archive-start{display:inline-flex;align-items:center;justify-content:center;gap:6px;width:100%;min-height:38px;border:1px solid var(--color-home-accent,#5db7ff);border-radius:10px;background:var(--color-home-accent,#5db7ff);color:#fff;font:inherit;font-size:11px;font-weight:800;text-decoration:none;cursor:pointer}.archive-start:hover{background:var(--color-home-accent-hover,#247fc4)}.archive-start:disabled{border-color:#dbe4ed;background:#edf2f6;color:#8091a3;cursor:not-allowed}.archive-aside{display:grid;align-content:start;gap:12px}.archive-tutor,.archive-note{padding:16px;border:1px solid var(--color-home-line,#dbe7f5);border-radius:14px;background:#fff}.archive-tutor{display:grid;grid-template-columns:56px 1fr;align-items:center;gap:10px;background:linear-gradient(135deg,#eaf6ff,#fff)}.archive-tutor .aqua-mascot img{width:52px}.archive-tutor strong{color:var(--color-home-accent-hover,#247fc4);font-size:11px}.archive-tutor p,.archive-note p{margin:4px 0 0;color:#587290;font-size:11px;line-height:1.5}.archive-note h2{margin:0;font:700 15px/1.25 var(--font-display)}@media(max-width:820px){.archive-layout{grid-template-columns:1fr;width:min(100% - 32px,700px)}.archive-aside{grid-template-columns:repeat(2,minmax(0,1fr))}.archive-tutor,.archive-note{min-width:0}}@media(max-width:560px){.archive-nav{padding:0 14px}.archive-nav span{display:none}.archive-layout{width:min(100% - 24px,600px);padding-top:24px}.paper-card-grid,.archive-aside{grid-template-columns:1fr}.archive-series>div{display:grid;grid-template-columns:1fr}.archive-series button{width:100%}}.status-layout{grid-template-columns:minmax(0,1fr) 260px}.status-table-wrap{margin-top:24px;overflow:auto;border:1px solid var(--color-home-line,#dbe7f5);border-radius:14px;background:#fff}.status-table{width:100%;border-collapse:collapse;font-size:11px}.status-table th,.status-table td{padding:11px 12px;border-bottom:1px solid #edf2f7;text-align:left;white-space:nowrap}.status-table th{background:#f7fbff;color:#69809d;font-size:10px;font-weight:800}.status-table tr:last-child td{border-bottom:0}.status-table td:nth-child(n+3){text-align:center}.status-table td b{display:block;color:#173055}.status-table td small{display:block;margin-top:2px;color:#69809d;font-size:9px}.status-ok{color:#36b37e}.status-pill{display:inline-flex;align-items:center;gap:4px;font-size:9px;font-weight:800;letter-spacing:.03em}.status-pill.is-ready{color:#137555}.status-pill.is-review{color:#a36b12}.paper-readiness-note{margin:-5px 0 14px;color:#69809d;font-size:10px;line-height:1.45}.mcq-review-list{display:grid;gap:14px}.mcq-review-card{border:1px solid #dbe7f5;border-radius:14px;padding:16px 18px;background:#fff}.mcq-review-card.is-review{border-color:#f2b24b;background:#fffaf1}.mcq-review-card header{display:flex;justify-content:space-between;gap:12px;color:#16315f}.mcq-review-card header span{font-size:12px;font-weight:700;color:#2f8b67}.mcq-review-card.is-review header span{color:#b36b00}.mcq-review-card p{line-height:1.5}.mcq-review-card ol{display:grid;gap:5px;margin:8px 0 0;padding-left:24px}.mcq-review-card small{display:block;margin-top:10px;color:#a15f00}.status-failed{color:#b44747}.structured-review-page{min-height:100vh;background:#f5f9fd}.structured-review-grid{display:grid;grid-template-columns:minmax(320px,.9fr) minmax(300px,.72fr) minmax(420px,1.15fr);gap:16px;padding:18px;align-items:start}.structured-review-pane{min-width:0;height:calc(100vh - 104px);overflow:auto;border:1px solid #d8e5f3;border-radius:18px;background:#fff;padding:16px}.structured-review-pane>header{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px}.structured-review-pane h2{margin:0;font-size:18px;color:#102b50}.structured-review-pane iframe{width:100%;height:calc(100% - 42px);border:0;border-radius:10px;background:#edf4fb}.structure-tree article{color:#173459;line-height:1.55}.structure-tree ul{padding-left:22px}.structure-tree li{margin:8px 0}.structure-tree p{margin:6px 0;white-space:pre-line;color:#58708e}.structure-tree .is-valid{color:#168b5b;font-weight:800}.structure-tree .is-review{color:#b76b12;font-weight:800}.reconstruction-preview .structured-question-renderer{padding:2px}.reconstruction-preview .structured-part-section{margin-bottom:14px}@media(max-width:1180px){.structured-review-grid{grid-template-columns:1fr}.structured-review-pane{height:auto;min-height:620px}}.mistakes-shell,.review-shell{width:min(100% - 40px,1240px);margin:0 auto;padding:44px 0 80px}.mistakes-hero{display:flex;justify-content:space-between;align-items:center;min-height:180px}.eyebrow{display:block;color:#287cf0;font-weight:800;font-size:15px;letter-spacing:.01em}.mistakes-hero h1,.review-header h1{margin:12px 0 8px;color:#102a55;font-size:46px;line-height:1.05;letter-spacing:-.04em}.mistakes-hero p,.review-header p{margin:0;color:#607798;font-size:17px}.mistakes-hero-mark{display:flex;align-items:center;gap:14px;color:#7c96b9;font-size:14px;font-weight:700;line-height:1.4}.mistakes-hero-mark img{width:150px;height:150px;object-fit:contain;filter:drop-shadow(0 12px 14px #bfd7f544)}.mistake-summary{display:flex;align-items:center;gap:16px;margin:20px 0 28px}.summary-tile{display:grid;grid-template-columns:28px auto;grid-template-rows:1fr 1fr;column-gap:10px;width:170px;padding:17px 20px;border-radius:18px}.summary-tile span{grid-row:span 2;display:grid;place-items:center}.summary-tile svg{width:24px;height:24px}.summary-tile strong{font-size:25px;line-height:1;color:#132e5b}.summary-tile small{color:#607798}.summary-tile.coral{background:#fff2f1;color:#e56060}.summary-tile.coral svg{color:#ef7272}.summary-tile.orange{background:#fff8ed}.summary-tile.orange svg{color:#f0a33c}.summary-tile.green{background:#effaf5}.summary-tile.green svg{color:#20a274}.primary-button,.secondary-button,.ask-button,.text-button,.back-button{display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:44px;border-radius:11px;border:1px solid transparent;font:inherit;font-weight:800;cursor:pointer;transition:transform .2s ease,box-shadow .2s ease,background .2s ease}.primary-button{padding:0 18px;color:#fff;background:#287cf0;box-shadow:0 8px 16px #287cf022}.primary-button:hover{transform:translateY(-2px);box-shadow:0 12px 22px #287cf033}.primary-button:disabled{opacity:.45;cursor:not-allowed;transform:none}.primary-button.small{min-height:40px;padding:0 15px}.secondary-button{padding:0 16px;color:#287cf0;background:#fff;border-color:#d8e7f8}.secondary-button:hover,.ask-button:hover{background:#f2f8ff}.focus-card{display:grid;grid-template-columns:1.15fr 1.5fr auto;align-items:center;gap:28px;padding:26px 28px;margin-bottom:32px;border:1px solid #e1edf8;border-radius:20px;background:#fbfdff;box-shadow:0 8px 28px #acc8e51c}.focus-intro{display:flex;gap:16px;align-items:center}.focus-icon{display:grid;place-items:center;width:48px;height:48px;border-radius:14px;background:#e7f1ff;color:#287cf0}.focus-card h2{margin:0 0 7px;color:#142f5b;font-size:20px}.focus-card p{margin:0;color:#647b9b}.focus-bars{display:grid;gap:12px}.focus-row{display:grid;grid-template-columns:100px 88px 1fr;gap:10px;align-items:center;color:#1b3763;font-size:14px}.focus-row span{color:#657c9b}.focus-row i{height:8px;background:#eaf1f8;border-radius:99px;overflow:hidden}.focus-row b{display:block;width:var(--bar);height:100%;background:#3180ef;border-radius:inherit;transform-origin:left;animation:grow .65s ease both}.mistake-toolbar{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:16px}.mistake-tabs{display:flex;gap:6px;flex-wrap:wrap}.mistake-tabs button{padding:11px 14px;border:0;background:transparent;color:#6b809f;border-radius:12px;font:inherit;font-weight:700;cursor:pointer}.mistake-tabs button.active{color:#287cf0;background:#eaf3ff}.mistake-tabs b{margin-left:5px}.selects{display:flex;gap:10px}.selects label{display:grid;gap:5px;color:#6680a3;font-size:11px;font-weight:800}.selects select{min-width:130px;padding:11px 28px 11px 12px;border:1px solid #dce8f4;border-radius:12px;background:#fff;color:#233d66;font:inherit}.mistake-list{display:grid;gap:16px}.mistake-card{display:grid;grid-template-columns:48px minmax(260px,1.7fr) 150px minmax(200px,1.05fr) 120px;gap:18px;align-items:start;padding:20px;border:1px solid #e3edf7;border-radius:18px;background:#fff;box-shadow:0 8px 24px #a5c0df18;animation:rise .5s ease both;animation-delay:var(--delay);transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease}.mistake-card:hover{transform:translateY(-2px);border-color:#cbdff4;box-shadow:0 13px 28px #a5c0df2a}.status-icon{width:42px;height:42px;border-radius:13px;display:grid;place-items:center}.status-icon svg{width:22px;height:22px}.status-icon.not_retried{color:#287cf0;background:#ebf4ff}.status-icon.needs_review{color:#e89a2c;background:#fff3df}.status-icon.mastered{color:#20a274;background:#e9f8f1}.card-kicker{display:flex;justify-content:space-between;gap:10px;color:#142f5b;font-size:14px}.card-kicker span{color:#7389a6;font-size:12px}.mistake-question h2{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin:10px 0 12px;color:#1a355f;font-size:16px;line-height:1.55}.meta-chips{display:flex;flex-wrap:wrap;gap:6px}.meta-chips span{padding:6px 8px;border-radius:8px;background:#f4f7fb;color:#6a809d;font-size:11px}.text-button{min-height:30px;padding:0;color:#287cf0;background:transparent;font-size:13px}.answer-compare{display:grid;gap:15px;padding-left:16px;border-left:1px solid #e5edf5}.answer-compare small,.review-answer-grid small{display:block;color:#7890ad;font-size:12px;margin-bottom:5px}.answer-compare strong,.review-answer-grid strong{display:flex;align-items:center;gap:6px;font-size:18px}.wrong-answer{color:#df6262}.correct-answer{color:#15936c}.why-wrong{padding:14px;border-radius:12px;background:#f0f7ff}.why-wrong h3,.review-explanation h2{display:flex;align-items:center;gap:7px;margin:0 0 9px;color:#183663;font-size:14px}.why-wrong h3 svg,.review-explanation h2 svg{color:#287cf0}.why-wrong p{margin:0 0 12px;color:#456383;font-size:13px;line-height:1.5}.ask-button{min-height:36px;padding:0 10px;color:#287cf0;background:#fff;border-color:#dbe9f8;font-size:12px}.ask-button img{width:20px;height:20px}.card-action{display:grid;justify-items:end;gap:9px}.card-action small{color:#7890ad}.empty-state{display:grid;justify-items:center;text-align:center;padding:70px 22px;margin-top:26px;border:1px dashed #cfe0f2;border-radius:22px;background:#fbfdff}.empty-aqua img{width:125px;height:125px;object-fit:contain}.empty-state h2{margin:14px 0 8px;color:#17325e;font-size:24px}.empty-state p{max-width:440px;margin:0 0 18px;color:#6680a3;line-height:1.6}.empty-state small{margin-top:18px;color:#8aa0ba}.review-shell{max-width:900px}.back-button{padding:0;color:#557394;background:transparent}.review-header{margin:34px 0 22px}.review-card{padding:30px;border:1px solid #e1edf8;border-radius:22px;background:#fff;box-shadow:0 12px 32px #aac7e51c}.review-question h2,.session-card h1{margin:0 0 24px;color:#15335f;font-size:24px;line-height:1.5}.review-question>img{display:block;max-width:100%;max-height:340px;margin:0 auto 24px;object-fit:contain}.review-answer-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:24px 0}.review-answer-grid>div{padding:17px;border-radius:13px;background:#fff6f5}.review-answer-grid>div+div{background:#f0faf6}.review-explanation{margin-top:22px;padding:20px;border-radius:16px;background:#eef6ff}.review-explanation p{margin:0 0 15px;color:#456383;line-height:1.6}.review-cta{margin-top:25px}.retry-area{padding-top:8px}.retry-area h3{color:#183663}.retry-area input,.session-card>input{width:100%;box-sizing:border-box;padding:14px;border:1px solid #cfdfee;border-radius:12px;font:inherit}.review-options{display:grid;gap:10px;margin:14px 0 18px}.review-options button{display:flex;gap:12px;align-items:center;padding:14px;text-align:left;border:1px solid #dbe7f3;border-radius:12px;background:#fff;color:#274669;font:inherit;cursor:pointer}.review-options button.selected{border-color:#287cf0;background:#edf5ff;color:#176be5}.review-options b{display:grid;place-items:center;width:28px;height:28px;border-radius:50%;background:#edf3f9}.retry-result,.session-feedback{display:flex;gap:12px;align-items:flex-start;margin-top:22px;padding:17px;border-radius:14px}.retry-result.correct,.session-feedback{color:#138866;background:#edf9f4}.retry-result.wrong{color:#b9761f;background:#fff7ea}.retry-result h2,.session-feedback h2{margin:0 0 5px;font-size:16px}.retry-result p,.session-feedback p{margin:0;color:#5d7693}.session-shell{max-width:760px}.session-progress{display:flex;justify-content:space-between;margin-bottom:14px;color:#6d84a1}.session-card h1{font-size:26px}.session-card .secondary-button{margin-top:12px}@keyframes rise{0%{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}@keyframes grow{0%{transform:scaleX(0)}to{transform:scaleX(1)}}@media(max-width:950px){.focus-card{grid-template-columns:1fr 1fr}.focus-card>.secondary-button{grid-column:span 2;justify-self:start}.mistake-card{grid-template-columns:42px 1fr 150px}.why-wrong{grid-column:2 / -1}.card-action{grid-column:3;grid-row:2;justify-items:start}.mistake-question{grid-column:2}.answer-compare{grid-column:3;grid-row:1 / span 1}}@media(max-width:680px){.mistakes-shell,.review-shell{width:min(100% - 24px,600px);padding-top:24px}.mistakes-hero-mark{display:none}.mistakes-hero h1,.review-header h1{font-size:38px}.mistake-summary{display:grid;grid-template-columns:1fr 1fr}.summary-tile{width:auto}.mistake-summary>.primary-button{grid-column:span 2;justify-self:stretch}.focus-card{grid-template-columns:1fr;padding:20px}.focus-card>.secondary-button{grid-column:auto}.mistake-toolbar{align-items:stretch;flex-direction:column}.selects{display:grid;grid-template-columns:1fr 1fr}.selects select{min-width:0;width:100%}.mistake-card{grid-template-columns:40px 1fr;gap:13px}.mistake-question,.answer-compare,.why-wrong,.card-action{grid-column:1 / -1}.answer-compare{grid-template-columns:1fr 1fr;padding:15px 0 0;border-left:0;border-top:1px solid #e5edf5}.card-action{display:flex;align-items:center;justify-content:space-between}.review-card{padding:20px}.review-answer-grid{grid-template-columns:1fr}.review-options button{min-height:50px}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.01ms!important;transition-duration:.01ms!important}}.progress-page{min-height:100dvh;background:var(--physics-shell-background);color:var(--color-home-ink)}.progress-dashboard{width:min(1196px,calc(100% - 48px));margin:0 auto;padding:30px 0 76px}.progress-heading{display:flex;align-items:center;justify-content:space-between;gap:24px}.progress-heading h1{margin:0;font:700 clamp(30px,3vw,38px)/1.08 var(--font-display);letter-spacing:-.04em}.progress-heading p{margin:5px 0 0;color:#647c9d;font-size:13px}.period-select{display:flex;align-items:center;gap:8px;min-width:154px;height:42px;padding:0 12px;border:1px solid #d7e5f3;border-radius:12px;background:#fff;color:#1476eb}.period-select select{flex:1;border:0;outline:0;background:transparent;color:#102b50;font:600 12px/1 var(--font-body);cursor:pointer}.progress-card{border:1px solid #deebf6;border-radius:16px;background:#fffffff0;box-shadow:0 7px 24px #22517e0b}.mastery-overview{display:grid;grid-template-columns:290px 1fr 380px;align-items:stretch;gap:24px;min-height:244px;margin-top:21px;padding:20px 21px}.mastery-ring-wrap{display:grid;place-items:center;align-content:center;border-right:1px solid #e4edf6}.mastery-ring{display:grid;place-items:center;width:172px;height:172px;border-radius:50%;background:conic-gradient(#328af4 var(--mastery),#e9f0f7 0);animation:ring-reveal 1.05s var(--ease-out) both}.mastery-ring:before{content:"";grid-area:1 / 1;width:153px;height:153px;border-radius:50%;background:#fff}.mastery-ring>div{z-index:1;grid-area:1 / 1;display:grid;place-items:center}.mastery-ring strong{color:#102b50;font:700 42px/1 var(--font-display);letter-spacing:-.04em}.mastery-ring span{margin-top:5px;color:#647c9d;font-size:11px}.mastery-ring-wrap>small{display:inline-flex;align-items:center;gap:5px;margin-top:10px;padding:6px 11px;border-radius:999px;background:#eaf5ff;color:#1174e7;font-size:10px;font-weight:700}.top-topics{display:grid;align-content:center;gap:15px;padding:4px 0}.top-topics h2,.section-title-row h2{margin:0;color:#102b50;font:700 14px/1.2 var(--font-display)}.topic-mastery{display:grid;gap:7px}.topic-mastery>span{display:grid;grid-template-columns:20px minmax(0,1fr) auto;align-items:center;gap:8px}.topic-mastery svg{color:#20b781}.topic-mastery strong{overflow:hidden;font-size:11px;text-overflow:ellipsis;white-space:nowrap}.topic-mastery b{font-size:11px}.topic-mastery i,.unit-mastery-list i{display:block;height:6px;margin-left:28px;overflow:hidden;border-radius:999px;background:#e8eff5}.topic-mastery em,.unit-mastery-list b{display:block;width:var(--progress);height:100%;border-radius:inherit;background:linear-gradient(90deg,#28ba85,#59ce9d);transform-origin:left;animation:progress-grow .85s var(--ease-out) var(--delay) both}.top-topics>button{justify-self:start;display:inline-flex;align-items:center;gap:6px;border:0;padding:0;background:transparent;color:#0874e9;font-size:11px;font-weight:700;cursor:pointer}.aqua-progress-message{display:flex;align-items:center;gap:20px;min-width:0;padding:21px;border-radius:14px;background:linear-gradient(125deg,#f2f9ff,#fbfdff)}.aqua-progress-message img{width:114px;height:128px;object-fit:contain;object-position:center}.aqua-progress-message h2{margin:0;color:#102b50;font:700 14px/1.25 var(--font-display)}.aqua-progress-message p{margin:7px 0 0;color:#607898;font-size:12px;line-height:1.55}.progress-stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:16px}.dashboard-stat{display:flex;align-items:center;gap:17px;min-height:116px;padding:18px;border:1px solid rgba(31,83,134,.055);border-radius:14px;box-shadow:0 5px 16px #22517e09;transition:border-color .18s,box-shadow .18s,transform .18s}.dashboard-stat:hover{border-color:#cbdff2;box-shadow:0 8px 20px #22517e12;transform:translateY(-1px)}.dashboard-stat>span{display:grid;place-items:center;flex:0 0 auto;width:58px;height:58px;border-radius:50%}.dashboard-stat strong{display:block;color:#102b50;font:700 27px/1 var(--font-display)}.dashboard-stat p{margin:5px 0 0;color:#5e7595;font-size:11px}.dashboard-stat small{display:block;margin-top:7px;font-size:9px;font-weight:600}.dashboard-stat--blue{background:#f8fbff}.dashboard-stat--blue>span{background:#e6f3ff;color:#1680f7}.dashboard-stat--blue small{color:#1475e6}.dashboard-stat--green{background:#f5fcf9}.dashboard-stat--green>span{background:#e1f8ee;color:#10aa75}.dashboard-stat--green small{color:#0d9e6c}.dashboard-stat--coral{background:#fff8f8}.dashboard-stat--coral>span{background:#ffe9e9;color:#e9444a}.dashboard-stat--coral small{color:#e04449}.dashboard-stat--orange{background:#fffbf5}.dashboard-stat--orange>span{background:#fff0dc;color:#ff8b16}.dashboard-stat--orange small{color:#ed7c0b}.progress-detail-grid{display:grid;grid-template-columns:minmax(0,1.78fr) minmax(320px,.94fr);gap:14px;margin-top:16px}.activity-card,.recent-card,.unit-mastery-card{min-width:0;padding:17px 19px}.section-title-row{display:flex;align-items:center;justify-content:space-between;gap:16px}.section-title-row p{margin:4px 0 0;color:#657b99;font-size:10px}.section-title-row :is(button,a){display:inline-flex;align-items:center;gap:5px;border:0;padding:4px;background:transparent;color:#0874e9;font-size:10px;font-weight:700;text-decoration:none;cursor:pointer}.activity-content{display:grid;grid-template-columns:minmax(0,1fr) 190px;gap:19px;margin-top:6px}.activity-bars{display:grid;grid-template-columns:repeat(var(--columns),minmax(28px,1fr));align-items:end;gap:9px;height:129px;padding:9px 0 0}.activity-bars button{position:relative;display:grid;grid-template-rows:16px 80px 18px;align-items:end;height:100%;border:0;padding:0;background:transparent;color:#607797;cursor:pointer}.activity-bars button>strong{align-self:center;color:#203f65;font-size:9px}.activity-bars button>i{display:flex;align-items:end;justify-content:center;height:80px;border-bottom:1px solid #e2ebf4}.activity-bars button>i b{width:min(38px,72%);height:var(--height);min-height:2px;border-radius:5px 5px 2px 2px;background:linear-gradient(#6ebaff,#2f84f4);transform-origin:bottom;animation:progress-grow .72s var(--ease-out) var(--delay) both}.activity-bars button:hover>i b,.activity-bars button.is-active>i b{background:#116fdf}.activity-bars button>small{align-self:end;font-size:9px}.activity-tooltip{position:absolute;z-index:3;bottom:calc(100% - 7px);left:50%;display:none;width:max-content;max-width:160px;padding:7px 9px;border-radius:8px;background:#102b50;color:#fff;font-size:9px;line-height:1.35;transform:translate(-50%);box-shadow:0 6px 16px #0b274a33}.activity-tooltip b{display:block}.activity-bars button:hover .activity-tooltip,.activity-bars button:focus-visible .activity-tooltip,.activity-bars button.is-active .activity-tooltip{display:block}.activity-summary{display:grid;align-content:center;padding-left:24px;border-left:1px solid #e1ebf4}.activity-summary strong{color:#2382f1;font:700 33px/1 var(--font-display)}.activity-summary span{max-width:130px;margin-top:6px;color:#546d8e;font-size:11px;line-height:1.35}.activity-summary small{margin-top:11px;color:#0aa876;font-size:10px;line-height:1.4}.activity-summary small.is-down{color:#d64c52}.recent-card{grid-column:2;grid-row:1 / span 2}.recent-list{margin-top:8px}.recent-list.is-expanded{max-height:480px;overflow-y:auto}.recent-list article{display:grid;grid-template-columns:35px minmax(0,1fr) auto;align-items:center;gap:10px;min-height:67px;border-bottom:1px solid #e6eef6}.recent-list article:last-child{border-bottom:0}.recent-icon{display:grid;place-items:center;width:32px;height:32px;border-radius:50%;font-size:18px}.recent-icon--green{background:#e8f8f1;color:#15ae78}.recent-icon--coral{background:#ffeded;color:#e9444a}.recent-icon--orange{background:#fff3e1;color:#ed8616}.recent-icon--blue{background:#e9f4ff;color:#1780f5}.recent-list strong{display:block;overflow:hidden;font-size:10px;text-overflow:ellipsis;white-space:nowrap}.recent-list p{display:-webkit-box;margin:4px 0 0;overflow:hidden;color:#647a98;font-size:9px;line-height:1.35;-webkit-box-orient:vertical;-webkit-line-clamp:2}.recent-list time{align-self:start;padding-top:22px;color:#768aa4;font-size:9px;white-space:nowrap}.recent-empty{display:grid;place-items:center;min-height:210px;padding:24px;color:#247de9;text-align:center}.recent-empty strong{margin-top:11px;color:#102b50;font-size:12px}.recent-empty p{max-width:240px;margin:6px 0 0;color:#647c9d;font-size:10px;line-height:1.45}.unit-mastery-card{scroll-margin-top:calc(var(--physics-shell-header-height) + 24px)}.unit-mastery-list{display:grid;gap:6px;margin-top:12px}.unit-mastery-list a{display:grid;grid-template-columns:20px 220px minmax(100px,1fr) 38px;align-items:center;gap:8px;min-height:20px;padding:2px 3px;border-radius:7px;color:#102b50;text-decoration:none;transition:background .18s}.unit-mastery-list a:hover{background:#f2f8fd}.unit-mastery-list span{color:#526b8b;font-size:10px}.unit-mastery-list strong{overflow:hidden;color:#58708e;font-size:10px;font-weight:500;text-overflow:ellipsis;white-space:nowrap}.unit-mastery-list i{margin-left:0}.unit-mastery-list em{color:#102b50;font-size:10px;font-style:normal;font-weight:700;text-align:right}.progress-enter{opacity:0;transform:translateY(18px);animation:progress-enter .52s var(--ease-out) var(--enter-delay) forwards}.progress-page :is(button,a,select):focus-visible{outline:3px solid var(--color-home-focus);outline-offset:2px}@keyframes progress-enter{to{opacity:1;transform:translateY(0)}}@keyframes progress-grow{0%{transform:scaleX(0)}}@keyframes ring-reveal{0%{background:conic-gradient(#328af4,#e9f0f7 0);transform:rotate(-6deg);opacity:.55}}@media(max-width:1040px){.mastery-overview{grid-template-columns:260px 1fr}.aqua-progress-message{grid-column:1 / -1}.progress-stat-grid{grid-template-columns:repeat(2,1fr)}.progress-detail-grid{grid-template-columns:1fr}.recent-card{grid-column:auto;grid-row:auto}}@media(max-width:720px){.progress-dashboard{width:100%;padding:24px 12px 72px}.progress-heading{align-items:stretch;flex-direction:column;gap:14px}.period-select{width:100%}.mastery-overview{grid-template-columns:1fr;padding:18px}.mastery-ring-wrap{padding-bottom:20px;border-right:0;border-bottom:1px solid #e4edf6}.aqua-progress-message{grid-column:auto}.progress-stat-grid{grid-template-columns:1fr}.dashboard-stat{min-height:100px}.activity-content{grid-template-columns:1fr}.activity-summary{grid-template-columns:auto 1fr;column-gap:9px;padding:14px 0 0;border-top:1px solid #e1ebf4;border-left:0}.activity-summary small{grid-column:1 / -1}.unit-mastery-list a{grid-template-columns:18px minmax(110px,1fr) 90px 34px}}@media(max-width:430px){.progress-heading h1{font-size:31px}.mastery-ring{width:158px;height:158px}.mastery-ring:before{width:140px;height:140px}.aqua-progress-message{align-items:flex-start;padding:16px}.aqua-progress-message img{width:82px;height:94px}.activity-card,.recent-card,.unit-mastery-card{padding:15px 13px}.activity-bars{gap:4px}.activity-bars button>i b{width:68%}.unit-mastery-list a{grid-template-columns:16px minmax(90px,1fr) 64px 32px;gap:5px}}@media(prefers-reduced-motion:reduce){.progress-enter,.mastery-ring,.topic-mastery em,.unit-mastery-list b,.activity-bars button>i b{opacity:1;transform:none;animation:none}}.aqua-network-lab{--ink: #10243d;--muted: #6b7d91;--line: #dbe6ef;--blue: #218bd0;--pale: #f4f9fc;min-height:100dvh;background:var(--pale);color:var(--ink);font-family:var(--font-body);padding-bottom:40px}.network-header{min-height:78px;padding:14px clamp(16px,4vw,58px);display:flex;align-items:center;justify-content:space-between;gap:20px;background:#fff;border-bottom:1px solid var(--line)}.network-brand{display:flex;align-items:center;gap:12px}.network-brand img{width:36px;height:42px;object-fit:contain}.network-brand p,.eyebrow{margin:0;color:var(--blue);font-size:10px;font-weight:800;letter-spacing:.14em}.network-brand h1{margin:3px 0 0;font:700 clamp(18px,2.2vw,25px)/1.05 var(--font-display);letter-spacing:-.04em}.network-actions{display:flex;gap:8px}.network-button{min-height:44px;padding:0 15px;border:1px solid var(--line);border-radius:12px;display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:800;font-size:13px;cursor:pointer}.network-button:disabled{opacity:.65;cursor:wait}.network-button--secondary{background:#fff;color:var(--ink)}.network-button--primary{background:var(--ink);border-color:var(--ink);color:#fff}.network-hero,.network-grid,.device-grid,.network-footer{width:min(1180px,calc(100% - 32px));margin-inline:auto}.network-hero{display:flex;align-items:end;justify-content:space-between;gap:28px;padding:54px 0 28px}.network-hero h2{max-width:650px;margin:8px 0 12px;font:700 clamp(30px,5vw,58px)/.98 var(--font-display);letter-spacing:-.06em}.network-hero p{max-width:680px;margin:0;color:var(--muted);font-size:15px;line-height:1.65}.hero-note{max-width:270px;padding:16px;border:1px solid var(--line);border-radius:16px;background:#fff;font-size:12px;line-height:1.5}.hero-note strong{display:block;margin-bottom:6px;font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:var(--blue)}.hero-note span{color:var(--muted)}.network-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}.network-card{min-height:230px;padding:17px;border:1px solid var(--line);border-radius:17px;background:#fff;box-shadow:0 7px 20px #2053780a}.network-card--running{border-color:#89c7eb}.network-card--pass{border-color:#93d8bd}.network-card--optional{border-color:#e8d29a;background:#fffdf7}.network-card--fail,.network-card--timeout{border-color:#e8aeb2}.network-card__top{display:flex;justify-content:space-between;align-items:center}.network-card__index{font:700 12px var(--font-display);color:#9aabba}.status{display:inline-flex;align-items:center;gap:4px;padding:5px 8px;border-radius:999px;font-size:9px;font-weight:900;letter-spacing:.08em}.status--idle{background:#edf3f7;color:#7a8b9d}.status--running{background:#e7f5ff;color:#1474ae}.status--pass{background:#e7f8f1;color:#178153}.status--optional{background:#fff4d8;color:#8a6517}.status--fail,.status--timeout{background:#fff0f0;color:#b73d49}.network-card h3{margin:26px 0 6px;font:700 18px/1.1 var(--font-display);letter-spacing:-.03em}.network-card>p{min-height:34px;margin:0;color:var(--muted);font:11px/1.45 ui-monospace,SFMono-Regular,Consolas,monospace}.network-card dl,.device-details{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px 14px;margin:20px 0 0;padding-top:13px;border-top:1px solid #edf2f5}.network-card dt,.device-details dt{color:#9aabba;font-size:9px;text-transform:uppercase;letter-spacing:.08em}.network-card dd,.device-details dd{margin:3px 0 0;font:700 12px var(--font-display);overflow-wrap:anywhere}.progress-track{height:4px;margin-top:16px;border-radius:99px;background:#e7f0f5;overflow:hidden}.progress-track span{display:block;height:100%;background:var(--blue);transition:width .2s}.network-error,.network-note{display:flex!important;align-items:flex-start;gap:5px;margin-top:12px!important;font-family:var(--font-body)!important}.network-error{color:#b73d49!important}.network-note{color:#8a6517!important}.device-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:12px}.device-panel,.diagnosis-panel{padding:22px;border:1px solid var(--line);border-radius:17px;background:#fff}.section-heading h2,.diagnosis-panel h2{margin:8px 0 0;font:700 23px/1.08 var(--font-display);letter-spacing:-.04em}.device-details{grid-template-columns:1fr 1fr}.device-details div:first-child{grid-column:1/-1}.device-details dd{font-family:var(--font-body);font-weight:600;line-height:1.4}.diagnosis-panel{background:var(--ink);color:#fff}.diagnosis-panel .eyebrow{color:#77cbff}.diagnosis-panel h2{font-size:28px}.diagnosis-panel p{margin:14px 0 0;color:#b6c7d7;font-size:13px;line-height:1.6}.network-footer{display:flex;justify-content:space-between;gap:20px;padding-top:24px;color:var(--muted);font-size:12px}.network-footer a{color:var(--blue);font-weight:800;text-decoration:none}.spin{animation:network-spin .9s linear infinite}@keyframes network-spin{to{transform:rotate(360deg)}}@media(max-width:900px){.network-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.network-hero{align-items:start;flex-direction:column}.hero-note{max-width:none;width:100%}}@media(max-width:600px){.network-header{align-items:stretch;flex-direction:column}.network-actions{display:grid;grid-template-columns:1fr 1fr}.network-button{padding:0 8px;font-size:12px}.network-hero,.network-grid,.device-grid,.network-footer{width:min(100% - 24px,520px)}.network-hero{padding:36px 0 20px}.network-grid,.device-grid{grid-template-columns:1fr}.network-card{min-height:0}.network-footer{flex-direction:column}.network-card h3{margin-top:20px}}@media(prefers-reduced-motion:reduce){.spin{animation:none}}.network-card--unreachable,.network-card--slow{border-color:#e8aeb2}.status--unreachable,.status--slow{background:#fff0f0;color:#b73d49}.network-meta{min-height:0!important;margin-top:12px!important;font-size:10px!important;line-height:1.5!important;overflow-wrap:anywhere}.auth-page{min-height:100vh;background:linear-gradient(135deg,#fff,#f8fcff 54%,#eef7ff);color:var(--color-home-ink)}.auth-page__main{min-height:calc(100vh - 77px)}.auth-layout{display:grid;grid-template-columns:minmax(380px,.82fr) minmax(480px,1.18fr);gap:clamp(36px,6vw,100px);align-items:center;width:min(100% - 80px,1450px);min-height:calc(100vh - 77px);margin:0 auto;padding:54px 0 64px}.auth-card{width:min(100%,630px)}.auth-card--success{align-self:center}.auth-card__icon{display:grid;place-items:center;width:56px;height:56px;margin-bottom:22px;border-radius:18px;background:#e8f8ef;color:#1b9a66}.auth-eyebrow{display:inline-flex;align-items:center;gap:7px;padding:10px 15px;border-radius:999px;background:#eaf4ff;color:#287ef0;font-size:15px;font-weight:850}.auth-card h1{margin:25px 0 11px;color:#102b55;font:800 clamp(43px,4.2vw,70px)/.99 var(--font-display);letter-spacing:-.055em}.auth-card h1 span,.account-card h1 span{color:#287ef0}.auth-subtitle{margin:0 0 29px;color:#6d85a5;font-size:19px;line-height:1.45}.auth-card form{display:grid;gap:18px}.auth-card label{display:grid;gap:8px;color:#142f59;font-size:15px;font-weight:800}.auth-input{display:flex;align-items:center;gap:12px;min-height:54px;padding:0 16px;border:1px solid #c8dbf0;border-radius:13px;background:#ffffffd1;color:#607b9e;transition:border-color .18s ease,box-shadow .18s ease,background-color .18s ease}.auth-input:focus-within{border-color:#4b98f6;background:#fff;box-shadow:0 0 0 4px #287ef01c}.auth-input input{width:100%;min-width:0;border:0;outline:0;background:transparent;color:#17365f;font:inherit;font-weight:500}.auth-input input::placeholder{color:#8da4c0}.auth-input button{display:grid;place-items:center;padding:3px;border:0;background:transparent;color:#6f88a8;cursor:pointer}.auth-card label.has-error .auth-input{border-color:#e27b7b;box-shadow:0 0 0 4px #e27b7b14}.auth-primary{display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:54px;padding:0 22px;border:1px solid #287ef0;border-radius:13px;background:#287ef0;color:#fff;font:inherit;font-weight:850;cursor:pointer;box-shadow:0 10px 20px #287ef02e;transition:transform .18s ease,box-shadow .18s ease,background-color .18s ease}.auth-primary:hover{transform:translateY(-2px);background:#2175e2;box-shadow:0 14px 25px #287ef03b}.auth-primary:active{transform:scale(.98)}.auth-primary:disabled{opacity:.55;cursor:not-allowed;transform:none;box-shadow:none}.auth-forgot{justify-self:end;margin-top:-7px;border:0;background:transparent;color:#287ef0;font:inherit;font-size:14px;font-weight:800;cursor:pointer}.auth-switch{margin-top:28px;color:#738ba9;font-size:15px}.auth-switch button,.auth-text-back{display:inline-flex;align-items:center;gap:5px;padding:0;border:0;background:transparent;color:#287ef0;font:inherit;font-weight:850;cursor:pointer}.auth-text-back{margin-top:22px;color:#5f789a}.auth-field-error{margin:-9px 0 -5px;color:#ca5454;font-size:13px;font-weight:700}.auth-error,.auth-config-note{display:flex;align-items:flex-start;gap:9px;margin:-8px 0 17px;padding:12px 14px;border-radius:11px;font-size:13px;line-height:1.45}.auth-error{border:1px solid #f0caca;background:#fff5f5;color:#b94b4b}.auth-config-note{border:1px solid #d8e6f5;background:#f2f8ff;color:#55769c}.auth-card--success p{max-width:500px;color:#667f9f;font-size:17px;line-height:1.55}.auth-card--success p strong{color:#17365f}.auth-card--success .auth-primary{margin-top:16px;width:min(100%,300px)}.auth-visual{position:relative;min-height:650px;overflow:hidden;border-radius:40px;background:radial-gradient(circle at 50% 47%,#6eb5ff47,#e3f3ffb3 42%,#f6fbffcc 70%)}.auth-visual__orbit{position:absolute;top:50%;left:50%;border:1px dashed rgba(109,177,247,.27);border-radius:50%;transform:translate(-50%,-50%) rotate(-12deg)}.auth-visual__orbit--outer{width:78%;height:68%}.auth-visual__orbit--inner{width:55%;height:48%;border-style:solid;border-color:#6db1f72b}.auth-visual__mascot-wrap{position:absolute;top:50%;left:50%;display:grid;place-items:center;transform:translate(-50%,-47%);animation:auth-float 4.6s ease-in-out infinite}.auth-visual__mascot-wrap img{width:clamp(220px,25vw,360px);height:clamp(280px,32vw,430px);object-fit:contain;filter:drop-shadow(0 22px 18px rgba(49,123,211,.22))}.auth-visual__mascot-wrap>span{position:absolute;top:22%;right:-33%;color:#287ef0;font-size:21px;line-height:1.1;transform:rotate(-7deg)}.auth-visual__mascot-wrap>span b{color:#54a0f5;font-weight:800}.auth-visual__card{position:absolute;display:grid;grid-template-columns:40px auto;align-items:center;gap:10px;min-width:148px;padding:13px 16px;border:1px solid rgba(205,226,246,.8);border-radius:20px;background:#ffffffe0;color:#5f7797;box-shadow:0 15px 27px #4685c11f;animation:auth-card-float 5.2s ease-in-out infinite}.auth-visual__card span{display:grid;place-items:center;width:40px;height:40px;border-radius:50%;background:#eef7ff;color:#287ef0;font-weight:900}.auth-visual__card strong{font-size:13px;line-height:1.25}.auth-visual__card--learn{top:18%;left:8%}.auth-visual__card--confidence{top:19%;right:8%;animation-delay:-1.2s}.auth-visual__card--support{bottom:25%;left:4%;animation-delay:-2.4s}.auth-visual__card--progress{right:4%;bottom:24%;animation-delay:-3.6s}.auth-visual__caption{position:absolute;right:26px;bottom:24px;left:26px;display:flex;align-items:center;justify-content:center;gap:7px;color:#6d88a9;font-size:13px;font-weight:750}.auth-visual__caption svg{color:#287ef0}.auth-loading{display:grid;place-items:center;gap:14px;min-height:100vh;color:#6682a4;font-weight:700}.auth-loading img{width:46px;height:50px}.account-card{width:min(100% - 80px,760px);margin:0 auto;padding:70px 0}.account-avatar{display:grid;place-items:center;width:64px;height:64px;margin-bottom:22px;border-radius:20px;background:#287ef0;color:#fff;font-size:28px;font-weight:850}.account-card h1{margin:24px 0 12px;color:#102b55;font:800 clamp(42px,5vw,70px)/1 var(--font-display);letter-spacing:-.05em}.account-card>p{color:#6d85a5;font-size:18px}.account-card>p strong{color:#17365f}.account-id{display:grid;gap:7px;margin-top:26px;font-size:13px!important}.account-id code{overflow-wrap:anywhere;padding:10px 12px;border-radius:9px;background:#eef6ff;color:#55789e;font:12px ui-monospace,SFMono-Regular,Consolas,monospace}.account-actions{display:flex;align-items:center;gap:22px;margin-top:30px}@keyframes auth-float{0%,to{transform:translate(-50%,-47%)}50%{transform:translate(-50%,calc(-47% - 4px))}}@keyframes auth-card-float{0%,to{transform:translateY(0)}50%{transform:translateY(-4px)}}@media(max-width:1040px){.auth-layout{grid-template-columns:minmax(350px,.9fr) minmax(350px,1.1fr);gap:34px;width:min(100% - 48px,960px)}.auth-visual{min-height:550px}.auth-visual__card{min-width:125px;padding:10px}.auth-visual__card span{width:32px;height:32px}.auth-visual__card strong{font-size:11px}.auth-visual__mascot-wrap>span{right:-20%;font-size:17px}}@media(max-width:760px){.auth-page__main{min-height:0}.auth-layout{display:block;width:min(100% - 32px,620px);padding:38px 0 56px}.auth-card{width:100%}.auth-card h1{font-size:clamp(42px,12vw,62px)}.auth-subtitle{font-size:16px}.auth-visual{display:none}.auth-card__icon{margin-top:10px}.account-card{width:min(100% - 32px,620px);padding:48px 0}.account-actions{align-items:stretch;flex-direction:column}.account-actions .auth-primary{width:100%}.home-navbar__actions{min-width:0}.auth-switch{line-height:1.6}}.aqua-calibration{min-height:100vh;padding:36px clamp(18px,4vw,64px) 64px;background:linear-gradient(145deg,#f6fbff,#eaf5ff);color:#17365f}.aqua-calibration__header{display:flex;align-items:flex-start;justify-content:space-between;gap:24px;max-width:1480px;margin:0 auto 24px}.aqua-calibration__back{display:inline-flex;align-items:center;gap:7px;padding:10px 13px;border:1px solid #cfe2f5;border-radius:11px;background:#fffc;color:#54759c;font-weight:800;cursor:pointer}.aqua-calibration__eyebrow{display:inline-flex;align-items:center;gap:7px;color:#287ef0;font-size:12px;font-weight:900;letter-spacing:.08em}.aqua-calibration h1{margin:9px 0 7px;font:800 clamp(28px,4vw,52px)/1 var(--font-display);letter-spacing:-.04em}.aqua-calibration__header p{margin:0;color:#6b87aa;font-size:15px}.aqua-calibration__tabs{display:flex;gap:10px;max-width:1480px;margin:0 auto 18px}.aqua-calibration__tabs button{display:inline-flex;align-items:center;gap:8px;padding:12px 16px;border:1px solid #d3e5f6;border-radius:12px;background:#fff;color:#7390b1;font-size:14px;font-weight:800;cursor:pointer}.aqua-calibration__tabs button.is-active{border-color:#287ef0;background:#287ef0;color:#fff;box-shadow:0 8px 18px #287ef02e}.aqua-calibration__workspace{display:grid;grid-template-columns:minmax(270px,330px) minmax(0,1fr);gap:20px;max-width:1480px;margin:0 auto}.aqua-calibration__controls,.aqua-calibration__preview{border:1px solid #d3e6f7;border-radius:20px;background:#fffc;box-shadow:0 18px 40px #3d6ea114}.aqua-calibration__controls{padding:20px}.aqua-calibration__section-title{display:flex;align-items:center;gap:10px;margin-bottom:12px}.aqua-calibration__section-title>span{display:grid;place-items:center;width:26px;height:26px;border-radius:50%;background:#e2efff;color:#287ef0;font-weight:900}.aqua-calibration__section-title strong,.aqua-calibration__section-title small{display:block}.aqua-calibration__section-title small{margin-top:3px;color:#8aa0ba;font-size:11px}.aqua-calibration__frame-list{display:grid;gap:8px;margin-bottom:25px}.aqua-calibration__frame-list button{display:grid;gap:4px;padding:11px 12px;border:1px solid #dceaf6;border-radius:10px;background:#fff;color:#5f7da2;text-align:left;cursor:pointer}.aqua-calibration__frame-list button.is-active{border-color:#7eb6fb;background:#edf6ff;color:#1a5fb2;box-shadow:inset 3px 0 #287ef0}.aqua-calibration__frame-list small{color:#9aafc7;font:11px ui-monospace,SFMono-Regular,Consolas,monospace}.aqua-calibration__slider{display:grid;grid-template-columns:1fr 72px;gap:7px 10px;align-items:center;margin:16px 0}.aqua-calibration__slider>span{grid-column:1 / -1;display:flex;justify-content:space-between;color:#6382a7;font-size:12px}.aqua-calibration__slider b{color:#287ef0}.aqua-calibration__slider output{font:800 12px ui-monospace,SFMono-Regular,Consolas,monospace}.aqua-calibration__slider input[type=range]{width:100%;accent-color:#287ef0}.aqua-calibration__number{width:72px;padding:7px 8px;border:1px solid #cfe2f4;border-radius:8px;color:#17365f;font:700 12px ui-monospace,SFMono-Regular,Consolas,monospace}.aqua-calibration__copy{display:inline-flex;align-items:center;justify-content:center;gap:7px;width:100%;min-height:42px;margin-top:8px;border:1px solid #287ef0;border-radius:10px;background:#287ef0;color:#fff;font-weight:800;cursor:pointer}.aqua-calibration__hint{margin-top:18px;padding:12px;border-radius:10px;background:#f0f7ff;color:#6b87aa;font-size:12px;line-height:1.5}.aqua-calibration__hint p{margin:5px 0 0}.aqua-calibration__preview{min-width:0;padding:14px}.aqua-calibration__preview-bar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:4px 4px 13px;color:#6e8bad;font-size:12px;font-weight:800}.aqua-calibration__preview-bar span{display:inline-flex;align-items:center;gap:7px}.aqua-calibration__preview-bar i{width:8px;height:8px;border-radius:50%;background:#39bb84;box-shadow:0 0 0 4px #39bb8421}.aqua-calibration__preview-bar b{color:#287ef0;font:700 12px ui-monospace,SFMono-Regular,Consolas,monospace}.aqua-calibration__stage{position:relative;min-height:500px}.aqua-calibration__stage .aqua-tour__stage{height:100%;min-height:500px}.aqua-calibration__crosshair{position:absolute;z-index:30;width:14px;height:14px;border:1px solid #287ef0;border-radius:50%;pointer-events:none;transform:translate(-50%,-50%);opacity:.75}.aqua-calibration__crosshair:before,.aqua-calibration__crosshair:after{position:absolute;content:"";background:#287ef0}.aqua-calibration__crosshair:before{top:6px;left:-6px;width:24px;height:1px}.aqua-calibration__crosshair:after{top:-6px;left:6px;width:1px;height:24px}.aqua-calibration__footnote{margin:12px 3px 0;color:#7d96b3;font-size:12px}.aqua-calibration__drag-surface{position:absolute;z-index:10;inset:0;cursor:crosshair}@media(max-width:900px){.aqua-calibration__header{display:block}.aqua-calibration__back{margin-bottom:20px}.aqua-calibration__workspace{grid-template-columns:1fr}.aqua-calibration__controls{order:2}.aqua-calibration__preview{order:1}.aqua-calibration__stage,.aqua-calibration__stage .aqua-tour__stage{min-height:430px}}@media(max-width:560px){.aqua-calibration{padding-inline:12px}.aqua-calibration__tabs{overflow-x:auto}.aqua-calibration__tabs button{white-space:nowrap}.aqua-calibration__preview{padding:8px}.aqua-calibration__stage,.aqua-calibration__stage .aqua-tour__stage{min-height:360px}.aqua-calibration__stage .aqua-tour__stage-viewport{padding:12px 10px 14px}.aqua-calibration__preview-bar{align-items:flex-start;flex-direction:column;gap:5px}}.economics-foundation{min-height:100vh;background:#f8fbfd;color:var(--color-home-ink)}.economics-foundation__main{width:min(1120px,calc(100% - 40px));margin:0 auto;padding:56px 0 88px}.economics-foundation__heading span{color:var(--color-home-accent-hover);font:700 12px/1 var(--font-body);letter-spacing:.08em;text-transform:uppercase}.economics-foundation__heading h1{margin:10px 0;font:700 clamp(34px,5vw,52px)/1.05 var(--font-display);letter-spacing:-.04em}.economics-foundation__heading p{max-width:700px;color:var(--color-home-muted);font-size:16px;line-height:1.6}.economics-card-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;margin-top:34px}.economics-card{padding:24px;border:1px solid var(--color-home-line);border-radius:18px;background:#fff}.economics-card h2,.economics-card h3{margin:0 0 8px}.economics-card p{margin:0;color:var(--color-home-muted);line-height:1.55}.economics-card small{display:block;margin-top:14px;color:var(--color-home-accent-hover);font-weight:700}.economics-card--wide{grid-column:1/-1}.assessment-papers{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin-top:28px}.answer-preview{display:grid;gap:12px;margin-top:18px}.answer-preview label{display:grid;gap:8px;font-weight:700}.answer-preview label span{display:flex;justify-content:space-between}.answer-preview textarea{width:100%;resize:vertical;padding:14px;border:1px solid var(--color-home-line-strong);border-radius:12px;font:400 15px/1.5 var(--font-body)}.empty-learning-state{margin-top:32px;padding:46px 28px;border:1px dashed var(--color-home-line-strong);border-radius:18px;background:#fff;text-align:center}.progress-zero-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin-top:28px}.progress-zero-grid strong{display:block;margin-bottom:4px;font:700 30px/1 var(--font-display)}.economics-notes textarea{width:100%;min-height:320px;margin-top:18px;padding:18px;border:1px solid var(--color-home-line);border-radius:14px;font:400 16px/1.6 var(--font-body)}.economics-mind-map{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:24px}.economics-mind-map article{padding:18px;border-left:3px solid var(--color-home-accent);border-radius:0 12px 12px 0;background:#fff}.economics-mind-map span{display:block;color:var(--color-home-accent-hover);font-weight:700}.economics-topic-overview{margin:16px 0;padding:22px;border:1px solid #bfe0e9;border-radius:16px;background:linear-gradient(135deg,#f0fbfd,#f5fbf8)}.economics-topic-overview>span{color:#1688a8;font-size:9px;font-weight:850;letter-spacing:.1em}.economics-topic-overview h3{max-width:760px;margin:7px 0;color:#173e56;font:700 18px/1.45 var(--font-display)}.economics-topic-overview p{max-width:780px;margin:0;color:#527184;font-size:12px;line-height:1.6}.economics-topic-overview>div{display:flex;align-items:center;gap:9px;margin-top:16px;overflow-x:auto;color:#268ca5}.economics-topic-overview b{flex:none;padding:8px 10px;border-radius:9px;background:#fff;color:#315c70;font-size:10px}@media(max-width:760px){.economics-foundation__main{width:min(100% - 24px,1120px);padding-top:34px}.economics-card-grid,.assessment-papers,.economics-mind-map{grid-template-columns:1fr}.progress-zero-grid{grid-template-columns:repeat(2,1fr)}}.practice-scope-tabs{display:flex;gap:8px;margin-top:28px}.practice-scope-tabs button{min-height:44px;padding:0 16px;border:1px solid var(--color-home-line-strong);border-radius:999px;background:#fff;color:#385f75;font-weight:750}.practice-scope-tabs button[aria-selected=true]{border-color:#188faa;background:#eaf8fb;color:#126f8b}.economics-practice-layout{display:grid;grid-template-columns:290px minmax(0,1fr);gap:18px;margin-top:18px}.economics-practice-layout>aside,.economics-live-question{border:1px solid var(--color-home-line);border-radius:18px;background:#fff}.economics-practice-layout>aside{display:grid;align-content:start;gap:7px;padding:16px}.economics-practice-layout>aside>span{padding:5px 7px;color:#1688a8;font-size:9px;font-weight:850;letter-spacing:.08em}.economics-practice-layout>aside button{display:grid;grid-template-columns:28px 1fr;align-items:start;gap:8px;min-height:52px;padding:10px;border:0;border-radius:11px;background:transparent;color:#45687c;text-align:left}.economics-practice-layout>aside button.is-current{background:#edf9fc;color:#16465e}.economics-practice-layout>aside i{display:grid;place-items:center;width:25px;height:25px;border-radius:8px;background:#e7f4f8;color:#1585a4;font-style:normal;font-weight:800}.economics-practice-layout>aside span{font-size:11px;line-height:1.45}.economics-live-question{padding:28px}.economics-live-question>header{display:flex;justify-content:space-between;gap:12px;color:#1688a8;font-size:10px;font-weight:800}.economics-live-question h2{margin:16px 0 20px;font:700 23px/1.42 var(--font-display)}.economics-live-options{display:grid;gap:9px}.economics-live-options button{display:flex;align-items:center;gap:10px;min-height:52px;padding:13px 15px;border:1px solid #d5e5ec;border-radius:12px;background:#fff;color:#31566b;text-align:left}.economics-live-options button.is-selected{border-color:#249fba;background:#edfafe}.question-dependencies{margin-top:18px;padding:14px;border-left:3px solid #72cab4;background:#f2faf7}.question-dependencies p{margin:4px 0 0;color:#52766c;font-size:11px}.question-actions{display:flex;justify-content:flex-end;gap:9px;margin-top:18px}.question-actions button,.mistake-retry,.review-practice-link{display:inline-flex;align-items:center;gap:7px;min-height:44px;padding:0 14px;border:1px solid #bddce6;border-radius:10px;background:#fff;color:#126f8e;text-decoration:none;font-weight:800}.practice-integrity{display:flex;gap:10px;margin-top:18px;padding:15px;border-radius:13px;background:#fff8e9;color:#6e5521}.practice-integrity p{margin:0;font-size:11px;line-height:1.5}.mistake-status{display:inline-block;margin-bottom:12px;padding:5px 8px;border-radius:999px;background:#fff3dc;color:#825c16;font-size:9px;font-weight:850;text-transform:uppercase}.mistake-status.is-mastered{background:#eaf8f3;color:#1b7058}.mistake-retry{margin-top:18px}.factor-review-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin-top:28px}.factor-review-grid article{padding:20px;border:1px solid #d8e7ee;border-radius:16px;background:#fff}.factor-review-grid svg{color:#168eaa}.factor-review-grid span{display:block;margin:10px 0 6px;color:#173f57;font-weight:800}.factor-review-grid p{margin:0;color:#587487;font-size:11px;line-height:1.5}.review-traps{display:grid;gap:9px;margin:0;padding-left:20px;color:#4c6a7c;line-height:1.5}.review-practice-link{margin-top:22px}.factor-mind-map{display:grid;justify-items:center;gap:17px;margin-top:28px;padding:28px;border:1px solid #d8e8ef;border-radius:20px;background:#f7fbfc}.factor-mind-map>svg{transform:rotate(90deg);color:#39a9c1}.factor-mind-map__root{display:flex;align-items:center;gap:10px;padding:17px 20px;border-radius:14px;background:#102d4c;color:#fff}.factor-mind-map__root.is-outcome{flex-wrap:wrap;justify-content:center;background:#e9f8f3;color:#1e6652}.factor-mind-map__root.is-outcome span{flex-basis:100%;text-align:center;font-size:10px}.factor-mind-map__branches{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:9px;width:100%}.factor-mind-map__branches article,.factor-mind-map__change article{display:grid;gap:5px;padding:15px;border-radius:12px;background:#fff;text-align:center}.factor-mind-map__branches span,.factor-mind-map__change span{color:#648090;font-size:10px}.factor-mind-map__change{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:9px;width:min(100%,720px)}.factor-mind-map>aside{display:flex;gap:9px;padding:13px;border-left:3px solid #e0a63e;background:#fff8e9;color:#6a531f}.factor-mind-map>aside p{margin:0;font-size:11px}@media(max-width:760px){.economics-practice-layout{grid-template-columns:1fr}.economics-practice-layout>aside{grid-auto-flow:column;grid-auto-columns:minmax(220px,75vw);overflow-x:auto}.economics-practice-layout>aside>span{display:none}.economics-live-question{padding:21px 16px}.question-actions{flex-direction:column}.factor-review-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.factor-mind-map__branches,.factor-mind-map__change{grid-template-columns:1fr}.practice-scope-tabs{overflow-x:auto}.practice-scope-tabs button{flex:none}}.economics-topic-overview nav{display:flex;gap:8px;margin-top:14px}.economics-topic-overview nav a{display:inline-flex;align-items:center;gap:6px;min-height:40px;padding:0 11px;border:1px solid #c8e1e8;border-radius:10px;background:#fff;color:#176f8a;text-decoration:none;font-size:10px;font-weight:800}.economics-lesson-page{min-height:100vh;background:#f5f9fc;color:var(--color-home-ink)}.economics-lesson-page button,.economics-lesson-page textarea{font:inherit}.economics-lesson-page button{cursor:pointer}.economics-lesson-page button:disabled{cursor:not-allowed;opacity:.45}.economics-lesson-page :is(button,a,summary,textarea,input):focus-visible{outline:3px solid #74d8ef;outline-offset:3px}.economics-lesson-layout{display:grid;grid-template-columns:280px minmax(0,1fr);min-height:calc(100vh - var(--physics-shell-header-height))}.econ-lesson-nav{position:sticky;top:var(--physics-shell-header-height);align-self:start;height:calc(100vh - var(--physics-shell-header-height));overflow:auto;padding:28px 20px;border-right:1px solid var(--color-home-line);background:#fff}.econ-lesson-nav>a{display:flex;align-items:center;gap:7px;color:var(--color-home-muted);font-size:12px;font-weight:700;text-decoration:none}.econ-lesson-nav header{display:grid;gap:8px;margin:25px 0 22px}.econ-lesson-nav header>span{color:var(--color-home-accent-hover);font-size:10px;font-weight:800;letter-spacing:.09em;text-transform:uppercase}.econ-lesson-nav header strong{font:750 18px/1.3 var(--font-display)}.econ-lesson-nav header small{display:flex;align-items:center;gap:6px;color:var(--color-home-muted)}.econ-lesson-nav nav{display:grid;gap:3px}.econ-lesson-nav nav button{display:grid;grid-template-columns:31px 1fr;align-items:center;gap:9px;min-height:50px;padding:7px;border:0;border-radius:11px;background:transparent;color:var(--color-home-muted);text-align:left;font-size:11px;line-height:1.3}.econ-lesson-nav nav button i{display:grid;place-items:center;width:29px;height:29px;border:1px solid var(--color-home-line);border-radius:9px;background:#fff;font-size:9px;font-style:normal;font-weight:800}.econ-lesson-nav nav button.is-current{background:#eaf7fd;color:#123b5a}.econ-lesson-nav nav button.is-current i{border-color:#1fa5cf;background:#1fa5cf;color:#fff}.econ-lesson-nav nav button.is-visited i{border-color:#9bdcc9;background:#edf9f5;color:#14815e}.econ-lesson-main{width:min(930px,calc(100% - 48px));margin:0 auto;padding:44px 0 90px}.econ-lesson-heading{display:grid;grid-template-columns:minmax(0,1fr) minmax(260px,340px);align-items:start;gap:36px}.econ-lesson-heading>div>span,.econ-step__header>span{color:#1688ad;font-size:10px;font-weight:850;letter-spacing:.1em;text-transform:uppercase}.econ-lesson-heading h1{margin:9px 0 6px;font:760 clamp(31px,4vw,48px)/1.04 var(--font-display);letter-spacing:-.04em}.econ-lesson-heading p{margin:0;color:var(--color-home-muted)}.econ-lesson-heading details{border:1px solid var(--color-home-line);border-radius:14px;background:#fff}.econ-lesson-heading summary{display:grid;gap:4px;padding:15px 17px;cursor:pointer;font-size:12px;font-weight:750}.econ-lesson-heading summary span{color:#1688ad;font-size:10px}.econ-lesson-heading ol{display:grid;gap:9px;margin:0;padding:0 22px 18px 42px;color:var(--color-home-muted);font-size:11px;line-height:1.5}.econ-progress{display:flex;align-items:center;gap:14px;margin:30px 0 24px}.econ-progress>span{flex:1;height:6px;overflow:hidden;border-radius:999px;background:#ddeaf2}.econ-progress b{display:block;height:100%;border-radius:inherit;background:#19a7ce;transition:width .32s cubic-bezier(.2,.8,.2,1)}.econ-progress>strong{color:#45667c;font-size:11px}.econ-step{min-height:590px;padding:42px clamp(24px,5vw,56px);border:1px solid #d9e7ef;border-radius:24px;background:#fff;box-shadow:0 12px 35px #18445e0f;animation:econ-section-in .3s cubic-bezier(.2,.8,.2,1)}.econ-step__header{margin-bottom:26px}.econ-step__header h2{margin:7px 0 0;font:750 clamp(26px,3.2vw,38px)/1.12 var(--font-display);letter-spacing:-.025em}.econ-lede{max-width:700px;margin:0 0 24px;color:#426176;font-size:16px;line-height:1.65}.econ-step__actions{display:flex;justify-content:space-between;gap:12px;margin-top:36px;padding-top:20px;border-top:1px solid var(--color-home-line)}.econ-step__actions button,.econ-primary,.econ-secondary{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:0 17px;border-radius:11px;font-size:12px;font-weight:800}.econ-back,.econ-secondary{border:1px solid var(--color-home-line);background:#fff;color:var(--color-home-ink)}.econ-continue,.econ-primary{border:1px solid #158eb5;background:#158eb5;color:#fff}.econ-continue:hover,.econ-primary:hover{background:#0f7698}.hook-scene{padding:29px;border-radius:20px;background:#102d4c;color:#fff}.hook-scene>span{color:#8fdbef;font-size:11px;font-weight:800;letter-spacing:.07em;text-transform:uppercase}.hook-scene>p{max-width:590px;margin:10px 0 25px;font:700 clamp(21px,3vw,30px)/1.3 var(--font-display)}.hook-scene>div{display:grid;grid-template-columns:repeat(3,1fr);gap:11px}.hook-scene button{display:grid;justify-items:start;gap:8px;min-height:144px;padding:18px;border:1px solid #ffffff28;border-radius:15px;background:#ffffff0d;color:#fff;text-align:left;transition:opacity .22s,transform .22s,border-color .22s,background .22s}.hook-scene button:hover,.hook-scene button.is-chosen{border-color:#67d0e8;background:#ffffff18;transform:translateY(-2px)}.hook-scene button.is-faded{opacity:.36;transform:scale(.98)}.hook-scene button strong{font-size:13px}.hook-scene button small{color:#bdd0df;font-size:10px}.choice-reveal{display:flex;gap:12px;margin-top:18px;padding:18px;border-left:3px solid #30b58a;border-radius:0 12px 12px 0;background:#edf9f5;color:#35586a}.choice-reveal svg{flex:none;color:#17825f}.choice-reveal p{margin:0;line-height:1.6}.scarcity-visual{margin:10px 0 24px;padding:20px;border:1px solid #dbeaf1;border-radius:18px;background:#f8fcfe}.scarcity-visual svg{display:block;width:100%;height:auto;max-height:330px}.scarcity-visual__track{fill:#e6eef3}.scarcity-visual__resource{fill:url(#resource-fill);animation:resource-grow .8s cubic-bezier(.2,.8,.2,1) both}.scarcity-visual__limit{stroke:#123b5a;stroke-width:2;stroke-dasharray:5 5}.scarcity-visual__kicker{fill:#527184;font-size:11px;font-weight:800;letter-spacing:1.2px}.scarcity-visual__label{fill:#fff;font-size:13px;font-weight:800}.scarcity-visual__limit-label{fill:#123b5a;font-size:11px;font-weight:700}.scarcity-visual__want circle{fill:#fff;stroke:#9dcbd8;stroke-width:2}.scarcity-visual__want path{stroke:#1c9fc3;stroke-width:3;stroke-linecap:round}.scarcity-visual__want{animation:want-in .27s ease both;animation-delay:calc(var(--i)*70ms)}.scarcity-visual__more{stroke:#1c9fc3;stroke-width:4;stroke-linecap:round}.scarcity-visual__gap{fill:#123b5a;font-size:13px;font-weight:800}.scarcity-visual figcaption{color:#49687a;font-size:12px;line-height:1.55}.scarcity-visual figcaption strong{color:#123b5a}.concept-card{position:relative;padding:25px 25px 22px;border-left:4px solid #1aa5cc;border-radius:0 17px 17px 0;background:#eef9fd}.concept-card>span,.goods-compare article>span,.practice-block>span,.exam-callout>span,.recap-map span,.lesson-complete>span{color:#1688ad;font-size:9px;font-weight:850;letter-spacing:.1em}.concept-card h3{margin:5px 0 15px;font:760 28px var(--font-display)}.concept-card p{margin:11px 0;color:#3d5c70;line-height:1.55}.concept-card p strong{display:block;color:#123b5a;font-size:10px;text-transform:uppercase}.note-button{display:inline-flex;align-items:center;gap:6px;min-height:40px;margin-top:11px;padding:0 12px;border:1px solid #bcdbe6;border-radius:10px;background:#fff;color:#126f91;font-size:11px;font-weight:800}.common-mistake,.oxygen-example,.completion-lock{display:flex;gap:12px;margin-top:18px;padding:17px;border-radius:13px}.common-mistake{background:#fff7e8;color:#6e531d}.common-mistake svg{flex:none;color:#c28618}.common-mistake p,.oxygen-example p,.completion-lock p{margin:4px 0 0;line-height:1.55;font-size:12px}.cause-effect{display:grid;justify-items:center;gap:20px;padding:28px;border-radius:20px;background:#f5fafc}.cause-effect__nodes{display:grid;width:min(100%,600px)}.cause-effect__piece{display:grid;justify-items:center}.cause-effect__arrow{margin:7px;color:#2ca8c5;animation:arrow-draw .42s ease both}.cause-effect__node{display:grid;width:100%;grid-template-columns:35px 1fr;gap:3px 12px;padding:15px 18px;border:1px solid #cfe2eb;border-radius:14px;background:#fff;color:#163d57;text-align:left;box-shadow:0 7px 18px #1c49600d}.cause-effect__node>span{grid-row:1/3;display:grid;place-items:center;width:32px;height:32px;border-radius:9px;background:#e6f7fa;color:#127b9c;font-size:10px;font-weight:850}.cause-effect__node small{color:#587487;font-size:10px;line-height:1.45}.stakeholder-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:9px;margin-top:22px}.stakeholder-strip article{display:grid;gap:5px;padding:14px;border-top:2px solid #78cab8;background:#f6fbfa}.stakeholder-strip svg{color:#1688ad}.stakeholder-strip strong{font-size:11px}.stakeholder-strip span{color:#587487;font-size:9px;line-height:1.4}.goods-compare{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:14px}.goods-compare>article{min-height:270px;padding:25px;border:1px solid #d8e7ee;border-radius:18px;background:#f9fcfd}.goods-compare>article:nth-child(3){border-top-color:#74cbb3}.goods-compare>div{color:#77909f;font-size:10px;font-weight:850;text-transform:uppercase}.goods-compare svg{display:block;margin:17px 0;color:#169cc2}.goods-compare h3{margin:0 0 8px;font:730 22px var(--font-display)}.goods-compare p{color:#47677a;font-size:12px;line-height:1.55}.goods-compare small{display:block;margin-top:16px;color:#356078;font-size:10px;font-weight:700}.oxygen-example{background:#eef9fd;color:#315a70}.oxygen-example svg{flex:none;color:#1688ad}.scenario{display:flex;gap:16px;padding:22px;border-radius:17px;background:#102d4c;color:#fff}.scenario svg{flex:none;color:#79d5e9}.scenario span{color:#90dff0;font-size:9px;font-weight:850;letter-spacing:.08em}.scenario p{margin:7px 0 0;font-size:15px;line-height:1.55}.choice-question{display:grid;gap:9px;margin:22px 0 0;padding:0;border:0}.choice-question legend{margin-bottom:12px;font:700 18px var(--font-display)}.choice-question button,.practice-options button{display:flex;align-items:center;gap:11px;min-height:50px;padding:12px 15px;border:1px solid #d6e5ed;border-radius:12px;background:#fff;color:#284d62;text-align:left;font-size:12px}.choice-question button:hover,.choice-question button.is-selected,.practice-options button:hover,.practice-options button.is-selected{border-color:#2aaac7;background:#eefafe}.answer-feedback{display:flex;gap:11px;margin-top:15px;padding:16px;border-radius:12px}.answer-feedback.is-correct{background:#edf9f5;color:#27604e}.answer-feedback.is-hint{background:#fff7e8;color:#6b531e}.answer-feedback>svg{flex:none}.answer-feedback strong{display:block}.answer-feedback p{margin:4px 0 0;font-size:12px;line-height:1.55}.answer-feedback small{display:block;margin-top:7px;font-weight:750}.practice-block{padding:23px 0;border-top:1px solid var(--color-home-line)}.practice-block:first-of-type{padding-top:0;border-top:0}.practice-block h3{margin:8px 0 15px;font:700 18px/1.4 var(--font-display)}.practice-options{display:grid;gap:8px}.practice-options svg{flex:none;color:#178eaf}.exam-callout{padding:23px;border-radius:17px;background:#102d4c;color:#fff}.exam-callout span{color:#83dcef}.exam-callout h3{display:flex;justify-content:space-between;gap:18px;margin:9px 0;font:700 19px/1.4 var(--font-display)}.exam-callout p{color:#c2d4df;font-size:12px}.exam-callout>div{display:flex;align-items:center;gap:10px;color:#8bdeec;font-size:11px;font-weight:800}.answer-builder{margin-top:18px}.answer-builder__fields>div{display:grid;justify-items:center}.answer-builder__fields>div>svg{margin:6px;color:#3ab2ca}.answer-builder label{display:grid;width:100%;gap:6px}.answer-builder label span{color:#244b61;font-size:10px;font-weight:850;text-transform:uppercase}.answer-builder textarea{width:100%;resize:vertical;padding:13px;border:1px solid #cfdee7;border-radius:11px;color:#163d57;line-height:1.5}.answer-builder__preview{margin-top:16px;padding:17px;border-left:3px solid #63cbb0;background:#f0faf7}.answer-builder__preview span{display:flex;align-items:center;gap:6px;color:#177b60;font-size:10px;font-weight:850;text-transform:uppercase}.answer-builder__preview p{margin:7px 0 0;line-height:1.55}.self-review{display:grid;gap:9px;margin:18px 0;padding:16px;border:1px solid #dbe8ee;border-radius:12px}.self-review legend{padding:0 7px;font-size:11px;font-weight:800}.self-review label{display:flex;align-items:flex-start;gap:8px;color:#3e6073;font-size:11px}.self-review input{margin-top:2px}.exam-callout~.note-button{margin-left:10px}.aqua-answer-button{display:inline-flex;align-items:center;gap:7px;min-height:46px;margin-left:9px;padding:0 14px;border:1px solid #b9dce7;border-radius:11px;background:#fff;color:#126e8e;font-size:11px;font-weight:800}.aqua-answer-button img{width:22px;height:25px}.recap-map{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}.recap-map article{display:grid;gap:8px;padding:19px;border:1px solid #dce8ef;border-radius:14px}.recap-map article:first-child{grid-column:1/-1;border-color:#9bd8e6;background:#f1fbfd}.recap-map strong{font-size:12px;line-height:1.5}.completion-lock{background:#fff7e8;color:#6d531b}.complete-button{margin-top:17px}.lesson-complete{display:grid;justify-items:center;padding:40px 20px;text-align:center}.lesson-complete>span{color:#16815f}.lesson-complete h3{margin:9px 0;font:760 30px var(--font-display)}.lesson-complete p{max-width:520px;color:#4d6a7b;line-height:1.6}.lesson-complete>div{display:flex;gap:10px;margin-top:17px}.lesson-complete :is(a,button){display:inline-flex;align-items:center;gap:7px;min-height:44px;padding:0 14px;border:1px solid #cfe0e8;border-radius:10px;background:#fff;color:#183f56;text-decoration:none;font-size:11px;font-weight:800}.module-detail .detail-start{text-decoration:none}.economics-lesson-page .aqua-selectable-question{display:block}@keyframes econ-section-in{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}@keyframes resource-grow{0%{width:0}to{width:318px}}@keyframes want-in{0%{opacity:0;transform:translateY(7px)}to{opacity:1;transform:none}}@keyframes arrow-draw{0%{opacity:0;transform:scaleY(0)}to{opacity:1;transform:scaleY(1)}}@media(max-width:980px){.economics-lesson-layout{grid-template-columns:1fr}.econ-lesson-nav{position:static;width:100%;height:auto;padding:16px 20px;border-right:0;border-bottom:1px solid var(--color-home-line)}.econ-lesson-nav header{display:none}.econ-lesson-nav nav{display:flex;overflow-x:auto;padding-top:12px}.econ-lesson-nav nav button{flex:0 0 48px;display:block;min-height:42px;padding:6px}.econ-lesson-nav nav button span{display:none}.econ-lesson-main{width:min(920px,calc(100% - 32px));padding-top:30px}.economics-lesson-page .physics-app-header.syllabus-nav{--syllabus-nav-height:117px}}@media(max-width:680px){.economics-lesson-page .physics-app-header.syllabus-nav{grid-template-columns:auto minmax(0,1fr) auto;gap:7px;padding-inline:8px}.economics-lesson-page .physics-app-header .syllabus-course{max-width:158px}.economics-lesson-page .physics-app-header__right{min-width:0}.economics-lesson-page .physics-app-header .mode-indicator{padding-inline:9px}.economics-lesson-page .physics-app-header .mode-indicator small{display:none}.economics-lesson-page .physics-app-header nav{width:100%;overflow:hidden}.economics-lesson-page .physics-app-header nav a{flex:1;min-width:0;font-size:11px}.econ-lesson-main{width:calc(100% - 20px);min-width:0;padding-top:22px}.econ-lesson-heading{grid-template-columns:minmax(0,1fr);gap:17px}.econ-lesson-heading h1{font-size:31px;overflow-wrap:anywhere}.econ-step{min-width:0;min-height:0;padding:26px 17px;border-radius:18px;overflow:hidden}.hook-scene{max-width:100%;padding:21px 16px;overflow:hidden}.hook-scene>p{overflow-wrap:anywhere}.hook-scene>div{grid-template-columns:minmax(0,1fr)}.hook-scene button{grid-template-columns:auto minmax(0,1fr);align-items:center;min-width:0;min-height:78px}.hook-scene button small{grid-column:2}.stakeholder-strip{grid-template-columns:repeat(2,minmax(0,1fr))}.goods-compare{grid-template-columns:minmax(0,1fr)}.goods-compare>div{text-align:center}.goods-compare>article{min-height:0}.recap-map{grid-template-columns:minmax(0,1fr)}.recap-map article:first-child{grid-column:auto}.scarcity-visual{padding:8px}.scarcity-visual__kicker{font-size:9px}.scarcity-visual__gap{font-size:11px}.econ-step__actions{position:sticky;bottom:0;z-index:5;margin-inline:-17px;margin-bottom:-26px;padding:13px 17px;background:#fffffff2;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.lesson-complete>div{flex-direction:column}.exam-callout h3{display:block}.exam-callout h3 b{display:block;margin-top:6px}.cause-effect{padding:18px 10px}}@media(prefers-reduced-motion:reduce){.econ-step,.econ-progress b,.hook-scene button,.scarcity-visual__resource,.scarcity-visual__want,.cause-effect__arrow{animation:none!important;transition:none!important}.econ-step__actions{scroll-behavior:auto}}.factors-hook{display:flex;align-items:center;justify-content:center;gap:20px;margin:24px 0;padding:32px;border-radius:18px;background:#102d4c;color:#fff}.factors-hook span{font-size:13px;font-weight:800;letter-spacing:.05em}.factors-hook strong{padding:12px 18px;border-radius:12px;background:#e8faf4;color:#176d55}.unscored-note{padding:13px 16px;border-left:3px solid #74cbb3;background:#f1faf7;color:#416b60;font-size:12px}.factor-definition-grid,.change-summary-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.factor-definition-grid article,.change-summary-grid article{padding:20px;border:1px solid #d9e8ef;border-radius:15px;background:#fbfdfe}.factor-definition-grid span{color:#1488aa;font-size:11px;font-weight:850;text-transform:uppercase}.factor-definition-grid strong,.change-summary-grid strong{display:block;margin:7px 0;color:#173f57;line-height:1.4}.factor-definition-grid p,.change-summary-grid p{margin:0;color:#557285;font-size:12px;line-height:1.55}.factor-visual{padding:22px;border:1px solid #d8e8ef;border-radius:20px;background:#f8fcfd}.factor-visual header span,.mobility-explorer header span,.quantity-quality figcaption span,.worked-example>span{color:#1587a9;font-size:9px;font-weight:850;letter-spacing:.1em}.factor-visual header h3,.mobility-explorer header h3,.quantity-quality h3{margin:6px 0;font:730 22px var(--font-display)}.factor-visual header p{margin:0;color:#587487;font-size:12px}.factor-visual__stage svg{display:block;width:100%;height:auto;max-height:350px}.factor-visual__stage svg g rect{fill:#fff;stroke:#cbdfe8;stroke-width:2;transition:all .2s ease}.factor-visual__stage svg g path{fill:none;stroke:#b8ccd7;stroke-width:2}.factor-visual__stage svg g text{fill:#31566c;font-size:13px;font-weight:800}.factor-visual__stage svg g.is-active rect{fill:#e9f9fd;stroke:#1da3c3;stroke-width:3}.factor-visual__stage svg g.is-active path{stroke:#1da3c3;stroke-width:3}.factor-visual__stage svg .factor-visual__reward{fill:#687f8e;font-size:10px}.factor-visual__stage svg .factor-visual__output{fill:#fff1d6;stroke:#b78325;stroke-width:2}.factor-visual__stage svg .factor-visual__output-label{fill:#7e6536;font-size:10px}.factor-visual__controls{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}.factor-visual__controls button{display:flex;align-items:center;gap:8px;min-height:52px;padding:9px;border:1px solid #d3e4eb;border-radius:11px;background:#fff;color:#31566c;text-align:left}.factor-visual__controls button[aria-pressed=true]{border-color:#1da3c3;background:#eaf9fd}.factor-visual__controls button span{display:grid}.factor-visual__controls small{color:#6d8491}.factor-visual__stage>aside{margin-top:12px;padding:15px;border-left:3px solid #6fcbb5;background:#f0faf7}.factor-visual__stage>aside p{margin:4px 0 0;color:#456c61;font-size:12px}.factor-table{width:100%;border-collapse:collapse;border:1px solid #d8e7ee;border-radius:14px;overflow:hidden}.factor-table th,.factor-table td{padding:14px;border-bottom:1px solid #e1ebf0;text-align:left}.factor-table th{background:#eef8fb;color:#27536a;font-size:11px;text-transform:uppercase}.factor-table td{color:#456477;font-size:13px}.exam-language{margin-top:18px;padding:18px;border-radius:14px;background:#102d4c;color:#fff}.exam-language p{margin:6px 0 0;color:#c5d6e0;font-size:12px;line-height:1.55}.worked-example{padding:24px;border-radius:18px;background:#f3fafb}.worked-example h3{margin:8px 0 15px}.worked-example ol{display:grid;gap:10px;padding-left:22px;color:#456477;font-size:13px;line-height:1.55}.worked-example>p{padding-top:12px;border-top:1px solid #d5e8ec;color:#315e70}.econ-apply-button{display:flex;align-items:center;gap:8px;min-height:48px;margin-top:16px;padding:0 15px;border:1px solid #abd9cc;border-radius:11px;background:#effaf6;color:#256b57;font-weight:800}.change-hook,.two-way-definition{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.change-hook article,.two-way-definition article{padding:22px;border:1px solid #d9e8ef;border-radius:16px;background:#fbfdfe}.change-hook span{color:#1689aa;font-size:10px;font-weight:850}.change-hook strong{display:block;margin:9px 0;color:#173f57}.change-hook p,.two-way-definition p{margin:0;color:#567487;font-size:12px;line-height:1.55}.two-way-definition{margin-top:16px}.two-way-definition strong{color:#16425a}.mobility-explorer{padding:22px;border:1px solid #d8e7ee;border-radius:19px;background:#f8fcfd}.mobility-explorer__tabs{display:flex;gap:8px;margin:18px 0;overflow-x:auto}.mobility-explorer__tabs button{min-height:42px;padding:0 15px;border:1px solid #cee0e8;border-radius:999px;background:#fff;color:#426479;font-weight:750;white-space:nowrap}.mobility-explorer__tabs button[aria-selected=true]{border-color:#168fac;background:#e9f8fb;color:#126e8a}.mobility-explorer__panel{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:14px}.mobility-explorer__panel article{min-height:160px;padding:20px;border-radius:14px;background:#fff}.mobility-explorer__panel span{color:#1788a8;font-size:9px;font-weight:850}.mobility-explorer__panel strong{display:block;margin:7px 0}.mobility-explorer__panel p{color:#557285;font-size:12px;line-height:1.55}.mobility-explorer__panel>svg{color:#4ab8cf}.quantity-quality{margin:20px 0;padding:22px;border:1px solid #d8e7ee;border-radius:18px}.quantity-quality>div{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}.quantity-quality article{display:grid;justify-items:start;gap:8px;padding:17px;border-radius:13px;background:#f3fafb}.quantity-quality article p{margin:0;color:#557285;font-size:12px;line-height:1.45}.quantity-quality article svg{color:#2aa8c3}.quantity-quality article b{color:#1a705a;font-size:11px}.quantity-quality>small{display:block;margin-top:14px;color:#607b8b;line-height:1.5}.factor-quick-checks .practice-block+.practice-block{margin-top:8px}.economics-factors-page .note-button svg,.economics-factors-page .complete-button svg{width:16px;height:16px}.economics-factors-page button:focus-visible,.economics-factors-page a:focus-visible{outline:3px solid #f0ae3c;outline-offset:3px}@media(max-width:680px){.factors-hook{flex-direction:column;padding:24px 16px;text-align:center}.factor-definition-grid,.change-summary-grid,.change-hook,.two-way-definition,.quantity-quality>div{grid-template-columns:1fr}.factor-visual{padding:15px 8px}.factor-visual__controls{grid-template-columns:repeat(2,minmax(0,1fr))}.factor-visual__stage svg{min-width:500px}.factor-visual__stage{overflow-x:auto}.mobility-explorer{padding:18px 12px}.mobility-explorer__panel{grid-template-columns:1fr}.mobility-explorer__panel>svg{transform:rotate(90deg);justify-self:center}.factor-table{display:block;overflow-x:auto;white-space:nowrap}}@media(prefers-reduced-motion:reduce){.factor-visual__stage svg g rect{transition:none}}.factor-visual__detail{margin-top:12px;padding:15px;border-left:3px solid #6fcbb5;background:#f0faf7}.factor-visual__detail p{margin:4px 0 0;color:#456c61;font-size:12px}@media(max-width:680px){.factor-visual__stage{overflow:visible}.factor-visual__stage svg{min-width:0}}:root{--color-primary: #5db7ff;--color-primary-hover: #369feF;--color-primary-soft: #e8f6ff;--color-sky: #79c9ff;--color-aqua-light: #aee1ff;--color-navy: #0b1d3a;--color-pink: #ff7da8;--color-amber: #f5b94c;--color-paper: #fafcff;--color-surface: #ffffff;--color-surface-blue: #f4faff;--color-ink-muted: #64748b;--color-border: #dcebf7;--color-border-strong: #b9ddf6;--color-disabled: #eef3f7;--color-disabled-ink: #9aa9b7;--color-home-accent: #3f8df5;--color-home-accent-hover: #2779e8;--color-home-accent-soft: #edf6ff;--color-home-accent-faint: rgba(63, 141, 245, .11);--color-home-paper: #fbfdff;--color-home-panel: rgba(255, 255, 255, .92);--color-home-panel-solid: #ffffff;--color-home-ink: #10264a;--color-home-muted: #667895;--color-home-line: #e1ebf5;--color-home-line-strong: #9bc8fb;--color-home-disabled: #f7f9fc;--color-home-disabled-ink: #97a5ba;--color-home-glow: rgba(185, 219, 255, .46);--color-home-glow-soft: rgba(225, 240, 255, .72);--color-home-orbit: rgba(116, 177, 239, .22);--color-home-shadow: rgba(24, 83, 154, .1);--color-home-shadow-strong: rgba(34, 111, 212, .22);--color-home-focus: #15345f;--font-display: "Outfit", "Avenir Next", "Segoe UI", sans-serif;--font-body: "Work Sans", "Segoe UI", sans-serif;--space-xs: 4px;--space-sm: 8px;--space-md: 16px;--space-lg: 24px;--space-xl: 32px;--space-2xl: 48px;--text-xs: 12px;--text-sm: 14px;--text-md: 16px;--text-lg: 20px;--text-xl: 28px;--text-display: clamp(38px, 3.25vw, 52px);--radius-sm: 12px;--radius-md: 18px;--radius-lg: 26px;--radius-pill: 999px;--shadow-card: 0 12px 34px rgba(11, 29, 58, .06);--shadow-card-hover: 0 18px 42px rgba(11, 29, 58, .1);--shadow-blue: 0 12px 28px rgba(93, 183, 255, .3);--shadow-home-panel: 0 16px 42px var(--color-home-shadow);--shadow-home-cta: 0 14px 28px var(--color-home-shadow-strong);--dur-fast: .16s;--dur-ui: .22s;--dur-enter: .68s;--ease-out: cubic-bezier(.2,.8,.2,1);--ease-in: cubic-bezier(.4,0,1,1);--ease-in-out: cubic-bezier(.4,0,.2,1);--layer-page: 0;--layer-header: 40;--layer-dropdown: 80;--layer-popover: 85;--layer-modal: 90;--physics-shell-header-height: 68px;--physics-shell-header-padding-x: 28px;--physics-shell-header-gap: 24px;--physics-shell-sidebar-width: 238px;--physics-shell-right-panel-width: 318px;--physics-shell-content-gap: 26px;--physics-shell-content-top: 34px;--physics-shell-background: #fafdff;--chat-color-surface: oklch(99% .006 238);--chat-color-paper: oklch(96.8% .012 238);--chat-color-user: oklch(94.5% .025 238);--chat-color-ink: oklch(25% .055 252);--chat-color-ink-hover: oklch(31% .065 252);--chat-color-on-ink: oklch(98% .006 238);--chat-color-muted: oklch(52% .035 245);--chat-color-muted-strong: oklch(42% .045 245);--chat-color-placeholder: oklch(61% .025 245);--chat-color-rule: oklch(90% .018 238);--chat-color-rule-strong: oklch(82% .04 238);--chat-color-scroll: oklch(78% .035 238);--chat-color-accent: oklch(68% .16 238);--chat-color-accent-soft: oklch(95% .025 238);--chat-color-focus: oklch(48% .15 245);--chat-color-ready: oklch(43% .12 160);--chat-color-ready-soft: oklch(95% .025 160);--chat-color-stop: oklch(46% .15 25);--chat-color-stop-soft: oklch(96% .025 25);--chat-color-stop-soft-hover: oklch(93% .04 25);--chat-radius-panel: 26px;--chat-radius-avatar: 13px;--chat-radius-message: 14px;--chat-radius-control: 12px;--chat-radius-composer: 19px;--chat-radius-send: 13px;--chat-shadow-panel: 0 20px 52px oklch(25% .05 245 / .14);--chat-shadow-composer: 0 8px 22px oklch(25% .05 245 / .06)}*{box-sizing:border-box}html{scrollbar-width:none}html::-webkit-scrollbar{display:none;width:0;height:0}html,body{margin:0;min-width:320px;min-height:100%;overflow-x:clip;background:var(--color-paper);color:var(--color-navy)}body{font-family:var(--font-body);font-size:16px;line-height:1.5;-webkit-font-smoothing:antialiased}button,a{font:inherit}button{color:inherit}button:not(:disabled),a{cursor:pointer}button:disabled{cursor:not-allowed}button:focus-visible,a:focus-visible{outline:3px solid rgba(11,29,58,.82);outline-offset:3px}.app-shell{min-height:100dvh;padding:14px 22px 40px;background:radial-gradient(circle at 50% 0%,rgba(174,225,255,.2),transparent 35%),var(--color-paper)}.shell{width:min(1380px,100%);margin-inline:auto}.skip-link{position:fixed;z-index:100;top:8px;left:8px;transform:translateY(-160%);background:var(--color-navy);color:#fff;padding:10px 14px;border-radius:var(--radius-sm)}.skip-link:focus{transform:translateY(0)}.navbar{height:70px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;padding:0 22px;border:1px solid rgba(220,235,247,.85);border-radius:22px;background:#ffffffe0;box-shadow:0 9px 30px #0b1d3a0b;-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px)}.brand{display:inline-flex;width:max-content;align-items:center;gap:8px;color:var(--color-navy);text-decoration:none;font:700 24px/1 var(--font-display);letter-spacing:-.04em}.brand img{width:34px;height:38px;transition:transform var(--dur-ui) var(--ease-out)}.brand:hover img{transform:rotate(-4deg) scale(1.04)}.navbar nav{align-self:stretch;display:flex;gap:30px}.nav-link{position:relative;border:0;padding:0 2px;background:none;font-weight:600;font-size:14px;color:var(--color-ink-muted);transition:color var(--dur-fast) var(--ease-out)}.nav-link:after{content:"";position:absolute;height:3px;border-radius:3px 3px 0 0;left:50%;right:50%;bottom:0;background:var(--color-primary);transition:left var(--dur-ui) var(--ease-out),right var(--dur-ui) var(--ease-out)}.nav-link:hover{color:var(--color-navy)}.nav-link:hover:after,.nav-link--active:after{left:0;right:0}.nav-link--active{color:var(--color-navy)}.nav-actions{justify-self:end;display:flex;align-items:center;gap:8px}.icon-button,.avatar-button{display:grid;place-items:center;width:42px;height:42px;border:1px solid transparent;border-radius:50%;background:transparent;transition:background var(--dur-fast),border-color var(--dur-fast),transform var(--dur-fast)}.icon-button:hover,.avatar-button:hover{background:var(--color-primary-soft);border-color:var(--color-border-strong);transform:translateY(-1px)}.icon-button:active,.avatar-button:active{transform:scale(.96)}.notification{position:relative}.notification>span{position:absolute;top:7px;right:7px;width:7px;height:7px;background:var(--color-pink);border:2px solid white;border-radius:50%}.streak{display:flex;align-items:center;gap:5px;min-height:40px;padding:0 13px;border:1px solid var(--color-border);border-radius:var(--radius-pill);background:#fff;transition:transform var(--dur-fast),border-color var(--dur-fast),background var(--dur-fast)}.streak svg{color:var(--color-pink)}.streak strong{font-family:var(--font-display)}.streak span{font-size:12px;color:var(--color-ink-muted)}.streak:hover{transform:translateY(-2px);border-color:#ffc1d5;background:#fff8fa}.streak:active{transform:scale(.97)}.page-main{padding-top:28px}.main-grid{display:grid;grid-template-columns:minmax(280px,.88fr) minmax(430px,1.46fr) minmax(310px,.95fr);gap:18px;align-items:stretch}.hero,.journey-card,.plan-card{min-width:0}.greeting{margin:2px 0 8px;color:#247fc4;font-weight:600;font-size:15px}.hero h1{max-width:440px;margin:0;font:700 var(--text-display)/.98 var(--font-display);letter-spacing:-.045em;overflow-wrap:anywhere}.hero h1 span{color:#329ce8}.hero__meta{margin:17px 0 2px;color:var(--color-ink-muted);font-size:13px;font-weight:600}.hero__line{margin:0 0 20px;color:var(--color-ink-muted)}.interactive-card,.journey-card,.plan-card,.progress-strip,.subject-card{background:var(--color-surface);border:1px solid var(--color-border);box-shadow:var(--shadow-card)}.continue-card{position:relative;min-height:294px;overflow:hidden;padding:22px;border-radius:var(--radius-lg);transition:transform var(--dur-ui) var(--ease-out),border-color var(--dur-ui),box-shadow var(--dur-ui)}.continue-card:before{content:"";position:absolute;inset:0;pointer-events:none;background:linear-gradient(150deg,transparent 50%,rgba(174,225,255,.24))}.continue-card:hover{transform:translateY(-3px);border-color:var(--color-border-strong);box-shadow:var(--shadow-card-hover)}.continue-card__copy{position:relative;z-index:2;width:68%}.subject-kicker{display:flex;align-items:center;gap:7px;color:#247fc4;font-weight:700;font-size:13px}.continue-card h2{margin:8px 0 0;font:700 28px/1.1 var(--font-display);letter-spacing:-.03em}.continue-card p{margin:4px 0 16px;color:var(--color-ink-muted);font-size:12px;white-space:nowrap}.mastery-row{display:flex;justify-content:space-between;gap:8px;margin-bottom:8px;color:var(--color-ink-muted);font-size:11px}.mastery-row strong{color:var(--color-navy);font-size:13px}.progress-bar{height:7px;overflow:hidden;background:#e9f0f5;border-radius:var(--radius-pill)}.progress-bar span{display:block;width:var(--progress);height:100%;border-radius:inherit;background:var(--color-primary);animation:progress-in .9s var(--ease-out) both;transform-origin:left}.primary-button,.secondary-button{border:0;min-height:46px;border-radius:var(--radius-pill);font-weight:700;display:flex;align-items:center;justify-content:center;gap:9px;transition:transform var(--dur-fast),background var(--dur-ui),box-shadow var(--dur-ui)}.primary-button{margin-top:18px;padding:0 19px;background:var(--color-navy);color:#fff;box-shadow:0 8px 18px #0b1d3a29}.primary-button svg,.secondary-button svg{transition:transform var(--dur-ui) var(--ease-out)}.primary-button:hover{transform:translateY(-2px);background:#163660;box-shadow:0 11px 22px #0b1d3a38}.primary-button:hover svg,.secondary-button:hover svg{transform:translate(4px)}.primary-button:active,.secondary-button:active{transform:scale(.975)}.companion{position:absolute;z-index:1;right:-16px;bottom:-14px;width:147px}.speech{position:absolute;z-index:2;top:-38px;right:17px;width:125px;padding:8px 10px;border:1px solid var(--color-border);border-radius:13px 13px 4px;background:#fff;box-shadow:0 7px 18px #0b1d3a14;color:var(--color-navy);font-size:10px;font-weight:600}.aqua-mascot img{display:block;width:100%;height:auto;object-fit:contain;filter:drop-shadow(0 12px 15px rgba(34,135,211,.15))}.aqua-mascot{animation:aqua-float 3.1s var(--ease-in-out) infinite;transform-origin:center bottom}.aqua-mascot--compact{width:100%}.aqua-mascot:hover{animation-play-state:paused;transform:translateY(-3px) rotate(-2deg)}.journey-card{min-height:520px;padding:22px 22px 16px;overflow:hidden;border-radius:var(--radius-lg);background:linear-gradient(180deg,#fafdff,#f0f9ff)}.journey-card__header{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;position:relative;z-index:3}.journey-card__header p{display:flex;align-items:center;gap:6px;margin:0 0 2px;color:#318fd2;font-size:12px;font-weight:700}.journey-card h2,.plan-card h2,.subjects h2{margin:0;font:700 24px/1.15 var(--font-display);letter-spacing:-.03em}.unit-chip{display:flex;align-items:center;gap:6px;padding:7px 10px;border-radius:var(--radius-pill);background:#fff;border:1px solid var(--color-border);font-size:11px;font-weight:700}.journey-route{position:relative;height:436px;margin-top:6px}.route-line{position:absolute;inset:0;width:100%;height:100%;overflow:visible}.route-line path{fill:none;stroke:#b9ddf6;stroke-width:3;stroke-linecap:round;stroke-dasharray:4 10}.learning-node{position:absolute;z-index:2;display:flex;align-items:center;gap:10px;min-width:174px;padding:8px 10px 8px 8px;border:1px solid transparent;border-radius:16px;background:#ffffffe6;box-shadow:0 5px 15px #0b1d3a0f;text-align:left;transition:transform var(--dur-ui) var(--ease-out),box-shadow var(--dur-ui),border-color var(--dur-ui),opacity var(--dur-ui)}.learning-node__icon{display:grid;place-items:center;flex:0 0 42px;width:42px;height:42px;border-radius:14px}.learning-node__text{display:grid}.learning-node__text strong{font-size:12px;line-height:1.2}.learning-node__text small{font-size:10px;color:var(--color-ink-muted);margin-top:2px}.learning-node--completed .learning-node__icon{color:#fff;background:var(--color-primary)}.learning-node--current{border-color:var(--color-primary);box-shadow:0 8px 26px #5db7ff3b;animation:node-breathe 3s var(--ease-in-out) infinite}.learning-node--current .learning-node__icon{color:var(--color-navy);background:#d9f0ff}.learning-node--locked{opacity:.53;box-shadow:none}.learning-node--locked .learning-node__icon{background:#edf2f6;color:#768797}.learning-node:not(:disabled):hover{transform:translateY(-3px);border-color:var(--color-border-strong);box-shadow:0 12px 28px #0b1d3a1a}.learning-node:not(:disabled):active{transform:scale(.98)}.learning-node--0{top:8px;left:8%}.learning-node--1{top:93px;right:3%}.learning-node--2{top:184px;left:15%}.learning-node--3{top:278px;right:5%}.learning-node--4{top:366px;left:9%}.journey-aqua{position:absolute;z-index:3;left:61%;top:220px;width:74px;pointer-events:none}.journey-aqua .aqua-mascot{animation-duration:3.4s}.plan-card{min-height:520px;padding:22px;border-radius:var(--radius-lg);display:flex;flex-direction:column}.plan-card>header{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}.plan-card>header>div{display:flex;align-items:center;gap:9px}.plan-card>header>div svg{color:#288fd9}.plan-card>header>span{font-size:11px;color:var(--color-ink-muted);background:var(--color-surface-blue);padding:6px 9px;border-radius:var(--radius-pill)}.plan-list{display:grid;gap:10px}.plan-item{display:grid;grid-template-columns:24px 40px minmax(0,1fr) auto;align-items:center;gap:8px;min-height:78px;padding:10px;border:1px solid #e7eef4;border-radius:16px;background:#fff;text-align:left;transition:transform var(--dur-ui) var(--ease-out),border-color var(--dur-ui),box-shadow var(--dur-ui)}.plan-item:hover{transform:translate(3px);border-color:var(--color-border-strong);box-shadow:0 7px 18px #0b1d3a0f}.plan-item:active{transform:scale(.985)}.plan-item__number{font:600 11px var(--font-display);color:#97a7b5}.plan-item__icon{display:grid;place-items:center;width:40px;height:40px;border-radius:12px;background:var(--color-primary-soft);color:#2489d4}.plan-item__copy{min-width:0;display:grid}.plan-item__copy strong{font-size:12px;line-height:1.25}.plan-item__copy small{margin-top:3px;color:var(--color-ink-muted);font-size:10px}.plan-item__time{font-size:10px;color:#247fc4;white-space:nowrap;background:#eff8ff;padding:5px 7px;border-radius:var(--radius-pill)}.secondary-button{width:100%;margin-top:16px;border:1px solid var(--color-border);background:var(--color-surface-blue);color:#167ec8}.secondary-button:hover{transform:translateY(-2px);border-color:var(--color-border-strong);background:#eaf7ff}.plan-note{display:flex;align-items:center;gap:8px;margin:auto auto 0;color:var(--color-ink-muted);font-size:10px}.plan-note span{width:6px;height:6px;border-radius:50%;background:var(--color-primary)}.progress-strip{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));margin-top:18px;border-radius:20px;padding:12px 14px}.metric{display:flex;align-items:center;justify-content:center;gap:10px;min-height:46px;border-right:1px solid #edf1f5}.metric:last-child{border-right:0}.metric__icon{display:grid;place-items:center;width:34px;height:34px;border-radius:11px;background:var(--color-primary-soft);color:#258bd5}.metric--pink .metric__icon{background:#fff0f5;color:#e9598a}.metric--amber .metric__icon{background:#fff8e9;color:#d99213}.metric--navy .metric__icon{background:#eef2f7;color:var(--color-navy)}.metric div{display:grid}.metric strong{font:700 16px var(--font-display)}.metric small{font-size:10px;color:var(--color-ink-muted)}.subjects{margin-top:22px}.section-heading{display:flex;justify-content:space-between;align-items:end;margin:0 5px 12px}.section-heading p{margin:0 0 2px;color:#318fd2;font-size:10px;font-weight:700;letter-spacing:.12em}.section-heading h2{font-size:22px}.section-heading>span{font-size:11px;color:var(--color-ink-muted)}.subject-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}.subject-card{position:relative;min-height:118px;padding:16px;border-radius:20px;display:grid;grid-template-columns:48px minmax(0,1fr);gap:11px;align-items:start;transition:transform var(--dur-ui) var(--ease-out),border-color var(--dur-ui),box-shadow var(--dur-ui),opacity var(--dur-ui)}.subject-card__icon{display:grid;place-items:center;width:48px;height:48px;border-radius:15px;color:#238bd6;background:var(--color-primary-soft);transition:transform var(--dur-ui) var(--ease-out)}.subject-card__copy p{margin:0;color:var(--color-ink-muted);font-size:9px}.subject-card__copy h3{margin:2px 0 1px;font:700 16px var(--font-display)}.subject-card__copy h3 span{font-size:11px;color:#368bc6}.subject-card__copy small{font-size:10px;color:var(--color-ink-muted)}.subject-card button{position:absolute;right:14px;bottom:13px;display:flex;align-items:center;gap:4px;border:0;background:transparent;color:#147fc9;font-weight:700;font-size:11px}.subject-card--active:hover{transform:translateY(-3px);border-color:var(--color-border-strong);box-shadow:var(--shadow-card-hover)}.subject-card--active:hover .subject-card__icon{transform:scale(1.06)}.subject-card--active button:hover svg{transform:translate(3px)}.subject-card--active button:active{transform:scale(.96)}.subject-card--disabled{opacity:.48;background:#fbfcfd;box-shadow:none}.subject-card--disabled .subject-card__icon{background:#f0f3f6;color:#81909e}.soon-label{position:absolute;right:14px;bottom:13px;font-size:10px;color:#748493;background:#edf2f5;padding:5px 8px;border-radius:var(--radius-pill)}.toast{position:fixed;z-index:50;right:24px;bottom:24px;display:grid;grid-template-columns:10px minmax(0,1fr) 42px;align-items:center;gap:12px;width:min(390px,calc(100% - 32px));padding:13px 12px 13px 16px;border:1px solid var(--color-border-strong);border-radius:18px;background:#fffffff5;box-shadow:0 20px 50px #0b1d3a2e;opacity:0;pointer-events:none;transform:translateY(12px);transition:opacity var(--dur-ui) var(--ease-out),transform var(--dur-ui) var(--ease-out)}.toast--open{opacity:1;pointer-events:auto;transform:translateY(0)}.toast__mark{width:8px;height:40px;border-radius:var(--radius-pill);background:var(--color-primary)}.toast strong{font:700 14px var(--font-display)}.toast p{margin:2px 0 0;color:var(--color-ink-muted);font-size:11px}.enter{animation:page-enter var(--dur-enter) var(--ease-out) both}.enter--1{animation-delay:0ms}.enter--2{animation-delay:80ms}.enter--3{animation-delay:.15s}.enter--4{animation-delay:.22s}.enter--5{animation-delay:.29s}.enter--6{animation-delay:.35s}@keyframes page-enter{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}@keyframes progress-in{0%{transform:scaleX(0)}to{transform:scaleX(1)}}@keyframes aqua-float{0%,to{transform:translateY(0)}50%{transform:translateY(-4px)}}@keyframes node-breathe{0%,to{transform:scale(1);box-shadow:0 8px 26px #5db7ff2e}50%{transform:scale(1.025);box-shadow:0 9px 29px #5db7ff47}}@media(max-width:1120px){.main-grid{grid-template-columns:minmax(290px,.85fr) minmax(420px,1.2fr)}.plan-card{grid-column:1/-1;min-height:auto}.plan-list{grid-template-columns:repeat(3,minmax(0,1fr))}.plan-note{margin-top:16px}.subject-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:780px){.app-shell{padding:8px 12px 28px}.navbar{grid-template-columns:1fr auto;height:62px;padding:0 14px;border-radius:18px}.navbar nav{position:fixed;z-index:20;left:12px;right:12px;bottom:10px;height:58px;justify-content:space-around;gap:0;padding:0 10px;border:1px solid var(--color-border);border-radius:20px;background:#fffffff5;box-shadow:0 12px 30px #0b1d3a24;-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px)}.nav-link{font-size:12px}.nav-link:after{bottom:8px}.streak span,.notification{display:none}.main-grid{grid-template-columns:minmax(0,1fr)}.hero h1{max-width:620px}.journey-card{min-height:520px}.plan-list{grid-template-columns:1fr}.progress-strip{grid-template-columns:repeat(2,minmax(0,1fr));gap:6px}.metric{border:0;justify-content:flex-start;padding-left:8px}.subject-grid{grid-template-columns:1fr 1fr}.toast{bottom:82px;right:16px}.subjects{padding-bottom:72px}}@media(max-width:520px){.nav-actions .streak{display:none}.brand span{font-size:21px}.page-main{padding-top:22px}.hero h1{font-size:39px}.hero__meta{font-size:11px}.continue-card{min-height:300px;padding:19px}.continue-card__copy{width:72%}.companion{right:-20px;width:138px}.speech{display:none}.journey-card{padding:18px 12px}.learning-node{min-width:158px}.learning-node--0{left:2%}.learning-node--1{right:0}.learning-node--2{left:6%}.learning-node--3{right:0}.learning-node--4{left:2%}.journey-aqua{left:60%;width:64px}.subject-grid{grid-template-columns:1fr}.section-heading>span{display:none}.progress-strip{padding:10px}.metric{gap:7px}.metric small{font-size:9px}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;scroll-behavior:auto!important;transition-duration:.01ms!important}.enter{opacity:1;transform:none}.progress-bar span{transform:scaleX(1)}}