@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;450;500;550;600;650;700&family=Manrope:wght@400;500;600;700;800&display=swap');
:root{--bg:#080e1a;--panel:#0b1322;--line:#1c2942;--text:#eaf0fa;--muted:#a6b6d2;--gold:#e8b464;--blue:#9fd0e8;--amber:#ff9e42;font-family:'DM Sans',sans-serif;color:var(--text);background:var(--bg);font-synthesis:none;color-scheme:dark}*{box-sizing:border-box}body{margin:0}button,a,input{-webkit-tap-highlight-color:transparent}button{font:inherit;color:inherit;cursor:pointer}button{background:none;border:0}a{color:inherit;text-decoration:none}button:focus-visible,a:focus-visible,[tabindex]:focus-visible,input:focus-visible{outline:2px solid var(--gold);outline-offset:4px}button:hover,a:hover{color:var(--gold)}button:disabled{opacity:.4;cursor:wait}.skip{position:fixed;top:-100px;z-index:50;padding:15px;background:var(--gold);color:var(--bg)}.skip:focus{top:0}header{height:87px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 3.5%;gap:24px}.brand{font-family:Manrope,sans-serif;display:flex;align-items:center;font-size:21px;font-weight:800;letter-spacing:.04em;gap:10px}.brand small{font:10px 'DM Sans',sans-serif;letter-spacing:.18em;border-left:1px solid var(--line);margin-left:6px;padding-left:15px;color:var(--muted)}.brand-mark{color:var(--gold);font-size:31px;font-weight:500;transform:skew(-12deg);margin-right:6px}nav{display:flex;gap:32px;align-items:center;font-size:14px;height:100%}nav a{height:100%;display:flex;align-items:center;border-bottom:2px solid transparent}nav a.active{border-color:var(--gold);color:var(--gold)}nav button{padding:10px 0}nav button span{padding-left:8px}.edition,.eyebrow,.section-label,.diagram-head,.model-badge{font-size:11px;font-weight:600;letter-spacing:.14em}.edition{color:var(--muted)}main{max-width:1800px;margin:0 auto;padding:0 3.5%}.intro{display:flex;justify-content:space-between;align-items:end;padding:36px 0 31px;gap:20px}.eyebrow{color:var(--gold);margin:0 0 13px}h1,h2,h3,p{margin-top:0}h1,h2{font-family:Manrope,sans-serif;font-weight:500;letter-spacing:-.045em}h1{font-size:clamp(28px,3vw,46px);margin-bottom:0;line-height:1.17}em{font-style:normal;color:var(--gold)}.intro>p{font-size:14px;line-height:1.65;color:var(--muted);margin:0}.workspace{display:grid;grid-template-columns:244px minmax(390px,1fr) 295px;border:1px solid var(--line);background:var(--panel);border-radius:12px;overflow:hidden}.controls{padding:24px 22px;border-right:1px solid var(--line)}.section-label{display:flex;align-items:center;justify-content:space-between;color:var(--muted);margin-bottom:27px}.section-label>button{border:1px solid var(--line);border-radius:50%;height:30px;width:30px;font-size:16px;margin:-5px 0}fieldset{padding:0;margin:0 0 26px;border:0}legend{font-size:14px;font-weight:600;margin-bottom:12px}.dose-options{display:flex;gap:7px}.dose-options button{flex:1;padding:13px 5px;border:1px solid var(--line);border-radius:6px;font-size:23px;font-weight:500;transition:.2s}.dose-options small{font-size:14px;color:var(--muted)}.dose-options button[aria-pressed=true]{color:var(--bg);background:var(--gold);border-color:var(--gold)}.dose-options button[aria-pressed=true] small{color:#4f3818}.micro{font-size:12px;color:var(--muted);margin:10px 0 0}.duration-options{display:grid;grid-template-columns:1fr 1fr;gap:8px}.duration-options button{padding:10px 3px;font-size:13px;border:1px solid var(--line);border-radius:5px;transition:.2s}.duration-options button[aria-pressed=true]{background:#342b1e;border-color:#9a7a42;color:var(--gold)}.assumptions{display:grid;grid-template-columns:24px 1fr;gap:15px 6px;padding:20px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.tiny-icon{font-size:21px;color:var(--gold)}.assumptions strong{font-size:12px;font-weight:500}.assumptions p{font-size:12px;color:var(--muted);line-height:1.5;margin:5px 0 0}.dose-note{font-size:12px;line-height:1.65;color:var(--muted);margin:18px 0 10px}.dose-note.warning{color:var(--amber)}.text-button{padding:7px 0;color:var(--gold);text-align:left;font-size:12px}.stage-wrap{min-width:0;background:radial-gradient(ellipse at 56% 48%,#1b2841 0,#0b1322 57%,#080e1a 100%);position:relative}.stage-top{height:70px;padding:18px 21px;display:flex;justify-content:space-between;gap:8px;position:relative;z-index:2}.view-tabs{display:flex;gap:1px;padding:3px;border:1px solid #273755;border-radius:7px;background:#0f1829}.view-tabs button{font-size:12px;padding:7px 11px;border-radius:4px;white-space:nowrap}.view-tabs button[aria-pressed=true]{background:#e8b464;color:#17120a}.model-badge{font-size:9px;align-self:center;white-space:nowrap;color:#a6b6d2}#stage{height:535px;position:relative;overflow:hidden;touch-action:pan-y}#stage canvas{position:absolute;inset:0;z-index:1;width:100%;height:100%;touch-action:none}.stage-grid{position:absolute;inset:0;background-image:linear-gradient(#9fd0e808 1px,transparent 1px),linear-gradient(90deg,#9fd0e808 1px,transparent 1px);background-size:50px 50px;mask-image:radial-gradient(ellipse,#000,transparent 70%)}.stage-title{position:absolute;z-index:2;top:24px;left:25px;pointer-events:none}.stage-title .eyebrow{font-size:9px;color:#a6b6d2;letter-spacing:.14em}.stage-title h2{font-size:28px;line-height:1.15;color:#eaf0fa}.hotspot{position:absolute;z-index:3;text-align:left;display:flex;gap:10px;align-items:center;padding:8px}.hotspot i{width:9px;height:9px;border:1px solid var(--gold);border-radius:50%;box-shadow:0 0 0 5px #e8b4641a;flex-shrink:0;animation:beacon 3s infinite}.hotspot span{font-size:11px;color:#eaf0fa;line-height:1.5;background:#0b1322dd;padding:4px 7px;border-radius:3px}.hotspot small{display:block;font-size:9px;color:#a6b6d2}.hotspot.brain{top:12%;left:65%}.hotspot.brain i{border-color:var(--blue)}.hotspot.muscle{top:38%;left:66%}.hotspot.water{top:64%;left:9%;flex-direction:row-reverse}.stage-bottom{position:absolute;bottom:5px;left:22px;right:22px;display:flex;justify-content:space-between;align-items:center;gap:10px;z-index:3}.stage-bottom>span{font-size:10px;color:#a6b6d2}.stage-bottom button{width:30px;height:30px;border:1px solid #36486b;border-radius:4px;margin-left:4px;font-size:19px;background:#0f1829}.stage-legend{height:44px;display:flex;align-items:center;justify-content:center;gap:14px;font-size:10px;color:#a6b6d2;border-top:1px solid #27375577}.stage-legend span{display:flex;align-items:center;gap:5px}.stage-legend i{width:5px;height:5px;border-radius:50%}.gold{background:var(--gold)}.blue{background:var(--blue)}#visual-label{color:#a6b6d2;font-size:9px}.insights{padding:24px 23px;border-left:1px solid var(--line)}.current>span{font-size:25px;font-family:Manrope,sans-serif;letter-spacing:-.04em}.current p{font-size:12px;color:var(--muted);margin:7px 0 24px}.mechanism-buttons{display:grid;gap:2px;margin-bottom:24px}.mechanism-buttons button{display:flex;gap:10px;text-align:left;padding:13px 10px;font-size:12px;color:var(--muted);border-radius:5px}.mechanism-buttons button span{font-size:10px;padding-top:2px;color:#6b7c9c}.mechanism-buttons button b{margin-left:auto;font-weight:400}.mechanism-buttons button[aria-pressed=true]{background:#342b1e;color:var(--gold)}#insight-content{border-top:1px solid var(--line);padding-top:20px}.chip{display:inline-block;padding:5px 7px;background:#342b1e;color:var(--gold);font-size:9px;letter-spacing:.09em;border-radius:3px;font-weight:500}.chip.amber{background:#432b1b;color:var(--amber)}#insight-content h3{font-family:Manrope,sans-serif;font-size:22px;letter-spacing:-.025em;font-weight:500;margin:14px 0 10px}#insight-content p{font-size:13px;line-height:1.7;color:var(--muted);margin-bottom:12px}.storage{height:5px;border-radius:4px;background:#273755;overflow:hidden;margin:15px 0 8px}.storage span{height:100%;display:block;background:var(--gold);transition:width 1s}.meter-label{display:flex;justify-content:space-between;font-size:10px;color:var(--muted)}.timeline{display:flex;align-items:center;gap:35px;padding:24px 0;border-bottom:1px solid var(--line)}.time-status{width:225px;flex-shrink:0}.time-status .eyebrow{font-size:9px;color:var(--muted);margin-bottom:7px}.time-status strong{font-size:13px;font-weight:500}.time-track{position:relative;flex:1;min-width:0;padding-top:19px}.track-line{height:2px;background:#273755;position:absolute;top:6px;left:5%;right:5%}.track-line span{display:block;height:2px;background:var(--gold);width:40%;transition:width .8s}.time-points{display:flex;justify-content:space-between}.time-points button{position:relative;font-size:11px;color:var(--muted);padding:3px 0;width:10%}.time-points button:before{content:'';position:absolute;top:-17px;left:calc(50% - 4px);width:7px;height:7px;background:#48587a;border-radius:50%}.time-points button[aria-current=step]{color:var(--gold)}.time-points button[aria-current=step]:before{background:var(--gold);box-shadow:0 0 0 5px #e8b46419}.play-button{border:1px solid #9a7a42;border-radius:5px;padding:11px 16px;color:var(--gold);font-size:12px;white-space:nowrap}.notice{display:flex;align-items:start;gap:12px;padding:20px 0;color:#a6b6d2;max-width:1050px}.notice>span{font-size:18px}.notice p{font-size:12px;line-height:1.65;margin:0}.notice strong{font-weight:500;color:#eaf0fa}.deep-dive{padding:65px 0 58px;display:grid;grid-template-columns:1fr 1.3fr;gap:70px;border-bottom:1px solid var(--line)}.deep-heading h2,.brain-explainer h2{font-size:34px;line-height:1.2;margin-bottom:20px}.deep-heading>p:not(.eyebrow),.brain-explainer>div>p:not(.eyebrow){color:var(--muted);font-size:15px;line-height:1.8;max-width:460px}.outline-button{padding:12px 18px;border:1px solid #36486b;color:#f4cf92;border-radius:5px;font-size:13px}.outline-button[aria-pressed=true]{background:#342b1e}.mechanism-canvas{border:1px solid var(--line);border-radius:10px;background:radial-gradient(ellipse at 65% 55%,#172540,#0b1322 70%);padding:24px}.diagram-head{display:flex;justify-content:space-between;align-items:center;color:var(--muted);font-size:10px}.mechanism-canvas p{font-size:13px;line-height:1.8;color:var(--muted);margin:0}#energy-svg{width:100%;overflow:visible}.energy-path{stroke:#e8b464;fill:none;stroke-width:1;stroke-dasharray:4 5;marker-end:url(#arrow)}.molecule{fill:#292638;stroke:#d1ad75;stroke-width:1}.atp{fill:#523d22;stroke:var(--gold)}svg text{font:500 20px 'DM Sans',sans-serif;fill:#eaf0fa;text-anchor:middle}.svg-small{font-size:12px;fill:#a6b6d2}.moving-p{fill:var(--gold);filter:drop-shadow(0 0 8px #f4cf92)}.brain-explainer{display:grid;grid-template-columns:1fr 1.3fr;gap:70px;padding:60px 0}.cyan{color:var(--blue)}.brain-explainer em{color:var(--blue)}.brain-evidence{display:grid;grid-template-columns:1fr 1fr;gap:20px}.brain-evidence article{padding:25px;border:1px solid var(--line);border-radius:8px}.brain-evidence h3{font-size:25px;font-weight:500;margin:25px 0 12px;letter-spacing:-.04em}.brain-evidence p{font-size:14px;line-height:1.8;color:var(--muted)}footer{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:30px 0;border-top:1px solid var(--line)}footer p,footer button{font-size:11px;color:var(--muted);margin:0}footer .brand{font-size:16px}footer .brand small{font-size:8px}dialog{width:min(950px,94vw);max-height:88vh;overflow:auto;border:1px solid #36486b;background:#0f1829;color:var(--text);padding:32px;border-radius:12px}dialog::backdrop{background:#050a15d9;backdrop-filter:blur(10px)}.dialog-top{display:flex;align-items:start;justify-content:space-between;gap:20px;margin-bottom:20px}.dialog-top h2{font-size:32px;margin:0}.dialog-top .eyebrow{font-size:10px}.close-dialog{font-size:32px;line-height:1;padding:0 6px}.source-card{display:grid;grid-template-columns:45px 1fr;gap:15px;border-top:1px solid #273755;padding:21px 0}.source-number{font-size:13px;color:var(--gold)}.source-card h3{font-size:16px;font-weight:500;margin:0 0 8px}.source-card p,.about-content p,#sources-content>p{font-size:14px;line-height:1.8;color:#a6b6d2}.source-card p{margin:5px 0}.source-card a,.about-content a{color:var(--gold)}.source-card small{font-size:11px;color:#a6b6d2}.source-group-title{font-size:22px;font-weight:500;margin:35px 0 15px}.video-link{display:inline-block;padding:10px 15px;border:1px solid #9a7a42;border-radius:5px;margin-top:8px}.source-callout{border-left:2px solid var(--amber);padding-left:15px}#loading{position:absolute;inset:35% 0 auto;text-align:center;z-index:5;font-size:14px;color:var(--gold);background:#0b1322dd;padding:20px}#loading span{display:block;height:2px;width:100px;background:var(--gold);margin:15px auto;animation:loading 1s infinite}#fallback{position:absolute;height:90%;left:25%;z-index:1;object-fit:contain;max-width:70%}[hidden]{display:none!important}.paused *{animation-play-state:paused!important}#cell-diagram{position:absolute;inset:0;z-index:2;pointer-events:none}#cell-diagram svg{width:100%;height:100%;padding:75px 10px 30px}.cell-membrane{fill:#172c4660;stroke:#b6a17d;stroke-width:2}.cell-inner{fill:#1b284188;stroke:#a88755;stroke-width:1}.flow-line{fill:none;stroke:#e8b464;stroke-width:1.5;stroke-dasharray:5 6;animation:flow 4s linear infinite}.cell-drop{fill:#9fd0e8;animation:breathe 3s ease-in-out infinite}.fiber{stroke:#f4cf92;stroke-width:10;stroke-linecap:round}.cell-text{font-size:14px}.cell-micro{font-size:11px;fill:#a6b6d2}.brain-context{display:flex;gap:5px;margin-bottom:14px}.brain-context button{font-size:11px;border:1px solid #375978;border-radius:4px;padding:7px}.brain-context button[aria-pressed=true]{color:var(--blue);background:#142e46}.neuron-lines{stroke:#9fd0e8;fill:none;stroke-width:1.5;stroke-dasharray:5 8;animation:flow 4s linear infinite}.neuron-node{fill:#9fd0e8;animation:breathe 3s infinite}.brain-focus-label{position:absolute;bottom:65px;left:25px;right:25px;text-align:center;font-size:12px;color:var(--blue);z-index:2;pointer-events:none}.comparison-label{position:absolute;top:44%;left:8%;z-index:3;padding:8px;font-size:11px;color:var(--muted);background:#141f34dd;border:1px solid #36486b;border-radius:4px;max-width:130px}.comparison-label b{color:var(--gold);font-weight:500;display:block;margin-bottom:5px}.recovery-pulse{animation:breathe 3s infinite;fill:#e8b464}.reduced-note{font-size:10px;color:var(--amber)}@keyframes beacon{50%{box-shadow:0 0 0 9px #e8b46405}}@keyframes breathe{50%{opacity:.35}}@keyframes flow{to{stroke-dashoffset:-104}}@keyframes loading{50%{transform:scaleX(.2)}}
@media(min-width:1550px){.workspace{grid-template-columns:280px minmax(490px,1fr) 330px}#stage{height:610px}.controls,.insights{padding:28px}.stage-title h2{font-size:34px}.hotspot span{font-size:13px}.hotspot small{font-size:11px}.model-badge{font-size:10px}}
@media(max-width:1180px){.workspace{grid-template-columns:210px minmax(300px,1fr) 255px}.controls,.insights{padding:20px 16px}.model-badge{display:none}.stage-title h2{font-size:23px}.hotspot span{font-size:10px}.hotspot small{font-size:9px}.view-tabs button{font-size:11px;padding:7px 9px}.stage-top{padding:18px 15px}#visual-label{display:none}.deep-dive,.brain-explainer{gap:35px}.time-status{width:185px}.timeline{gap:20px}}
@media(max-width:960px){header{padding:0 4%;height:72px}.edition{display:none}main{padding:0 4%}.intro{padding:28px 0}.intro>p{display:none}.workspace{grid-template-columns:210px 1fr}.insights{grid-column:1/-1;border-left:0;border-top:1px solid var(--line);display:grid;grid-template-columns:190px 1fr;column-gap:25px}.insights .section-label{grid-column:1/-1;margin-bottom:20px}.current{grid-column:1}.mechanism-buttons{grid-column:1;grid-row:3/5}.insights #insight-content{grid-column:2;grid-row:2/4;border:0;padding:0}.insights #evidence-link{grid-column:2}.stage-title h2{font-size:28px}.hotspot.brain{left:68%}.hotspot.muscle{left:65%}.hotspot.water{left:5%}.timeline{flex-wrap:wrap}.time-status{width:100%;display:flex;justify-content:space-between;align-items:center}.time-status .eyebrow{margin:0}.deep-dive,.brain-explainer{grid-template-columns:1fr;gap:30px;padding:40px 0}.deep-heading>p:not(.eyebrow),.brain-explainer>div>p:not(.eyebrow){max-width:660px}footer{flex-wrap:wrap}.brain-evidence{gap:15px}}
@media(max-width:600px){header{height:65px;gap:10px}.brand{font-size:17px;gap:5px}.brand-mark{font-size:25px}.brand small{display:none}nav{gap:17px;font-size:12px}nav a{display:none}.intro{padding:28px 0 24px}.intro .eyebrow{font-size:9px}h1{font-size:30px;max-width:340px}.workspace{display:flex;flex-direction:column}.controls{display:grid;grid-template-columns:1fr 1.25fr;gap:12px 16px;border-right:0;padding:18px}.controls .section-label{grid-column:1/-1;margin:0}.controls fieldset{margin:0}.controls legend{font-size:12px}.dose-options button{font-size:21px;padding:11px 2px}.dose-options small{font-size:11px}.duration-options{gap:5px}.duration-options button{font-size:11px;padding:6px 1px}.assumptions{grid-column:1/-1;display:flex;gap:6px;padding:13px 0;justify-content:space-between}.assumptions .tiny-icon{display:none}.assumptions strong{font-size:10px}.assumptions p{display:none}.dose-note{grid-column:1/-1;font-size:11px;margin:0}.controls>.text-button{display:none}.micro{font-size:9px}.stage-wrap{border-top:1px solid var(--line)}#stage{height:480px}.stage-top{height:65px;justify-content:center}.view-tabs button{font-size:12px;padding:7px 14px}.stage-title{top:14px;left:16px}.stage-title h2{font-size:24px}.stage-title .eyebrow{font-size:8px}.hotspot.brain{left:63%;top:12%}.hotspot.muscle{left:62%;top:39%}.hotspot.water{left:1%;top:65%}.hotspot span{font-size:9px}.hotspot small{font-size:8px}.stage-bottom{left:14px;right:14px}.stage-bottom>span{font-size:9px}.insights{display:block;padding:22px}.insights .section-label{margin-bottom:20px}.current{display:flex;align-items:center;gap:15px;margin-bottom:17px}.current>span{font-size:23px;white-space:nowrap}.current p{font-size:10px;margin:0}.mechanism-buttons{grid-template-columns:1fr 1fr;gap:5px;margin-bottom:18px}.mechanism-buttons button{font-size:11px;padding:9px 5px}.mechanism-buttons button span{display:none}.insights #insight-content{border-top:1px solid var(--line);padding-top:18px}#insight-content h3{font-size:23px}#insight-content p{font-size:14px}.timeline{padding:20px 0;gap:22px}.play-button{font-size:11px;padding:10px 12px}.time-track{min-width:100%;order:2}.time-status{width:auto;flex:1;display:block}.time-status .eyebrow{margin-bottom:7px}.notice p{font-size:11px}.deep-heading h2,.brain-explainer h2{font-size:29px}.deep-dive{padding-top:35px}.mechanism-canvas{padding:18px}.diagram-head{font-size:8px}.diagram-head .chip{font-size:8px}.brain-evidence{grid-template-columns:1fr}.brain-evidence article{padding:20px}.brain-evidence h3{margin-top:15px}footer{gap:15px}footer p{order:3;font-size:10px}dialog{padding:23px}.dialog-top h2{font-size:25px}.source-card{grid-template-columns:26px 1fr;gap:7px}.comparison-label{font-size:9px;left:2%;max-width:90px}#cell-diagram svg{padding-top:65px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}
/* Keep functional copy readable without crowding the scientific stage. */
legend,.duration-options button,.view-tabs button,.mechanism-buttons button{font-size:14px}.assumptions strong{font-size:13px}#insight-content p{font-size:14px}.dose-note{font-size:13px}.hotspot span{font-size:12px}.hotspot small{font-size:10px}.stage-bottom>span,.stage-legend{font-size:11px}.time-points button{font-size:12px}.svg-small{font-size:12px}#energy-svg>text:not(.svg-small):not(.cell-text):not(.cell-micro){font-size:17px}.insights{padding-bottom:26px}.brain-buttons[hidden]{display:none!important}
@media(max-width:1180px){.view-tabs button,.duration-options button,.mechanism-buttons button{font-size:12px}.dose-note{font-size:12px}.hotspot span{font-size:10px}}
@media(max-width:600px){.view-tabs button{font-size:13px}.duration-options button,.mechanism-buttons button{font-size:12px}.dose-note{font-size:12px}.assumptions strong{font-size:10px}.hotspot span{font-size:10px}.stage-bottom>span{font-size:9px}.stage-legend{font-size:10px}.insights .brain-buttons{display:grid}.brain-buttons button span{display:none}}
.skip{visibility:hidden}.skip:focus{visibility:visible}#insight-content .period-note{font-size:12px;line-height:1.65;border-left:1px solid #9a7a42;padding-left:10px;margin-top:16px}.dose-options button{white-space:nowrap}
@media(max-width:600px){.dose-options button{font-size:18px}.dose-options small{font-size:10px}.assumptions>div{flex:1;min-width:0}.assumptions strong{font-size:11px;line-height:1.5;display:block}}

@media(max-width:600px){nav a.sleep-back{display:flex;height:auto;border:0;font-size:11px}header nav{gap:11px}}