:root{--paper:#f6f4ed;--ink:#182e34;--muted:#566a6e;--line:#d7ded8;--accent:#126956;--gold:#8d5823;--white:#fffef9;--night:#071c25;--r:18px;--max:1200px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.7 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif}a{color:var(--accent);text-underline-offset:.2em}a:hover{text-decoration-thickness:2px}button,input,select{font:inherit}button,select{min-height:44px}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.55}:focus-visible{outline:3px solid #9c4c11;outline-offset:4px}button,a,input,select{-webkit-tap-highlight-color:transparent}button{touch-action:manipulation}.skip{position:absolute;top:-90px;left:16px;background:var(--ink);color:white;padding:12px;z-index:10}.skip:focus{top:10px}.shell{max-width:var(--max);margin-inline:auto;padding-inline:28px}.site-header{border-bottom:1px solid var(--line)}.header-inner{display:flex;align-items:center;gap:24px;min-height:88px}.brand{text-decoration:none;color:var(--ink);font-weight:800;font-size:24px;letter-spacing:.1em}.brand small{display:block;font-size:9px;font-weight:650;letter-spacing:.19em;line-height:1.2}.header-nav{margin-inline-start:auto;display:flex;align-items:center;gap:20px}.header-nav a{font-size:14px;text-decoration:none;color:var(--ink)}.language{display:flex;gap:0;border:1px solid var(--line);border-radius:50px;padding:3px;background:var(--white)}.language button{border:0;min-height:36px;border-radius:30px;padding:4px 13px;background:transparent;font-size:13px}.language button[aria-pressed=true]{background:var(--ink);color:var(--white)}.kicker{color:var(--accent);font-size:12px;font-weight:750;letter-spacing:.13em;text-transform:uppercase;margin:0 0 20px}h1,h2,h3{font-family:Georgia,"Times New Roman",serif;font-weight:400;line-height:1.12;margin:0 0 20px}h1{font-size:clamp(38px,5.9vw,74px);letter-spacing:-.045em;max-width:1000px}h2{font-size:clamp(27px,3vw,40px);letter-spacing:-.025em}h3{font-size:27px}p{margin:0 0 18px}.lede{font-size:clamp(17px,1.7vw,21px);line-height:1.7;color:var(--muted);max-width:810px}.page-intro{padding-block:56px 30px}.intro-top{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:24px}.intro-top .kicker{margin:0}.badge{display:inline-flex;border:1px solid #cbd8ca;padding:3px 12px;font-size:11px;color:var(--accent);border-radius:30px}.hero-film{display:grid;grid-template-columns:1.2fr .8fr;background:var(--night);color:#eff5ee;border-radius:var(--r);overflow:hidden;margin-block:16px 36px}.hero-film img{display:block;width:100%;height:100%;object-fit:cover;min-height:300px}.hero-copy{padding:34px;align-self:center}.hero-copy h2{font-size:36px}.hero-copy p{color:#bbced1}.hero-copy .kicker{color:#76d3b9}.button{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:10px 18px;border:1px solid var(--accent);border-radius:7px;background:var(--accent);color:white;text-decoration:none;font-size:14px;font-weight:650;line-height:1.35}.button:hover{filter:brightness(1.08)}.button.secondary{background:transparent;color:var(--ink);border-color:#a4b5ad}.hero-film .button{background:#74d8be;border-color:#74d8be;color:#0d282e}.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-block:34px 58px}.film-card{background:var(--white);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;display:flex;flex-direction:column}.film-card .card-image{display:block;aspect-ratio:16/9;overflow:hidden}.film-card img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .25s}.film-card .card-image:hover img{transform:scale(1.025)}.card-body{padding:25px;display:flex;flex:1;flex-direction:column}.card-meta{display:flex;gap:10px;color:var(--muted);font-size:11px;margin-bottom:16px}.card-body p{font-size:15px;color:var(--muted)}.card-body .button{margin-top:auto;align-self:flex-start}.principles{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;border-top:1px solid var(--line);padding-top:30px;margin-bottom:60px}.principles h3{font:650 16px/1.4 system-ui,sans-serif;letter-spacing:0}.principles p{font-size:14px;color:var(--muted)}.tabs{display:flex;gap:4px;align-items:stretch;flex-wrap:wrap;border-bottom:1px solid var(--line);margin-bottom:20px}.tabs button{border:0;background:transparent;padding:13px 17px;font-size:14px;border-bottom:3px solid transparent;color:var(--muted)}.tabs button[aria-selected=true]{color:var(--accent);border-color:var(--accent);font-weight:750}.tab-panel[hidden]{display:none}.stage{border:1px solid #1b3d46;background:var(--night);border-radius:var(--r);overflow:hidden;position:relative}.stage canvas{display:block;width:100%;height:510px}.caption-box{padding:24px 28px;border:1px solid var(--line);border-top:0;border-radius:0 0 var(--r) var(--r);background:var(--white);margin:-12px 0 20px;padding-top:30px}.caption-box h2{font:650 18px/1.4 system-ui,sans-serif;margin-bottom:8px;letter-spacing:0}.caption-box p{font-size:15px;color:var(--muted);margin:0;min-height:48px}.controls{padding:20px;border:1px solid var(--line);border-radius:var(--r);background:#efeee5;margin:18px 0}.control-row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.control-row+ .control-row{margin-top:15px}.control-row label{font-size:13px;color:var(--muted);display:flex;gap:9px;align-items:center;flex-wrap:wrap}.controls select{max-width:230px;padding:7px 28px 7px 10px;border:1px solid #acbbb3;border-radius:6px;background:var(--white);color:var(--ink)}.controls .button{min-height:44px;padding:9px 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span{display:block;color:var(--accent);font:650 11px system-ui;margin-bottom:7px}.chapter-button[aria-pressed=true]{border-color:var(--accent);background:#e5eee4}.video-frame{background:var(--night);border-radius:var(--r);overflow:hidden}.video-frame video{display:block;width:100%;height:auto;aspect-ratio:16/9;max-height:80vh;object-fit:contain}.video-note{font-size:13px;color:var(--muted);margin:16px 0}.download-row{display:flex;gap:20px;flex-wrap:wrap;margin:20px 0 35px;font-size:14px}.prose{max-width:850px}.prose h2{margin-top:38px;font-size:30px}.prose h3{margin-top:28px;font:650 18px/1.4 system-ui,sans-serif}.prose p{color:#384e53}.prose code,.equation{font-family:ui-monospace,SFMono-Regular,Consolas,monospace}.equation{direction:ltr;text-align:left;display:block;overflow-x:auto;border:1px solid var(--line);border-radius:8px;background:var(--white);padding:18px;font-size:14px;white-space:pre;margin-block:18px;color:var(--ink)}.model-detail{margin-block:25px 45px;border:1px solid var(--line);border-radius:var(--r);background:var(--white);padding:0 24px}.model-detail summary{cursor:pointer;min-height:60px;display:list-item;padding-block:18px;font-weight:650}.model-detail .prose{padding-bottom:15px}.rank-inspector{padding:16px;background:#eef1e8;border-radius:10px;margin-top:22px}.rank-inspector label{display:flex;gap:14px;align-items:center;font-size:13px}.rank-inspector input{max-width:250px}.rank-output{font-family:ui-monospace,Consolas,monospace;font-size:14px;direction:ltr;text-align:left;margin-top:8px}.proof-table{border-collapse:collapse;width:100%;margin-block:20px;font-size:14px}.proof-table td,.proof-table th{border-bottom:1px solid var(--line);padding:8px;text-align:start}.proof-table th{font-weight:650}.source-links{padding-inline-start:23px;font-size:14px}.source-links li{margin-bottom:9px}.transcript-chapter{border-top:1px solid var(--line);padding-top:24px;margin-top:24px}.transcript-chapter h3{font-size:19px}.time-chip{font-family:ui-monospace,monospace;color:var(--accent);font-size:13px}.transcript-chapter button{border:0;background:transparent;color:var(--accent);padding:0;min-height:36px;text-decoration:underline;font-size:13px}.site-footer{border-top:1px solid var(--line);margin-top:60px;padding-block:28px 36px;font-size:12px;color:var(--muted)}.footer-inner{display:flex;gap:20px;justify-content:space-between;flex-wrap:wrap}.status-message{min-height:26px;font-size:13px;color:var(--accent);overflow-wrap:anywhere}.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}.share-field{width:100%;padding:8px;border:1px solid var(--line);font:12px ui-monospace,monospace}.embed .site-header,.embed .page-intro,.embed .site-footer,.embed .model-detail,.embed .toolbar,.embed .rank-inspector{display:none}.embed .shell{max-width:none;padding:10px}.embed .chapters{display:none}.embed .tabs{margin-bottom:10px}.embed .caption-box{margin-bottom:8px}.embed .controls{margin:8px 0;padding:12px}body[dir=rtl]{font-family:Tahoma,"Segoe UI",Arial,sans-serif}body[dir=rtl] h1,body[dir=rtl] h2,body[dir=rtl] h3{font-family:Tahoma,"Segoe UI",Arial,sans-serif;letter-spacing:0;line-height:1.5}body[dir=rtl] h1{font-size:clamp(32px,4.6vw,57px)}body[dir=rtl] .kicker{letter-spacing:0}body[dir=rtl] .hero-copy h2{font-size:30px}.noscript{padding:18px;border:1px solid #ac7437;background:#fff3d9;margin:16px 0}
@media(max-width:850px){.cards{grid-template-columns:1fr 1fr}.film-card:last-child{grid-column:1/-1;max-width:580px}.hero-film{grid-template-columns:1fr}.hero-film img{min-height:0}.hero-copy{padding:28px}.principles{grid-template-columns:1fr}.chapters{grid-template-columns:repeat(3,1fr)}.header-nav a{display:none}.page-intro{padding-top:35px}.prose{max-width:none}}
@media(max-width:560px){.shell{padding-inline:15px}.header-inner{min-height:74px;gap:10px}.brand{font-size:20px}.brand small{font-size:8px}.header-nav{gap:8px}.language button{padding-inline:10px}.page-intro{padding-top:28px;padding-bottom:17px}h1{font-size:41px}.lede{font-size:16px}.hero-copy h2{font-size:29px}.cards{grid-template-columns:1fr}.film-card:last-child{grid-column:auto;max-width:none}.hero-copy{padding:23px}.tabs button{padding:11px 9px;font-size:12px}.stage{border-radius:12px}.caption-box{padding:24px 17px 17px}.caption-box p{font-size:14px}.caption-box h2{font-size:16px}.controls{padding:14px}.slider-row{grid-template-columns:1fr auto;gap:8px}.slider-row label{grid-column:1/-1}.control-row .button{font-size:12px;padding-inline:10px}.chapters{grid-template-columns:repeat(2,1fr)}.model-detail{padding-inline:16px}.footer-inner{display:block}.footer-inner p{margin-bottom:8px}.rank-inspector label{display:block}.rank-inspector input{display:block;max-width:none}.download-row{gap:12px}.video-frame video{max-height:none}.source-links{overflow-wrap:anywhere}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}}@media print{.site-header,.controls,.toolbar,.tabs,.chapters,.video-frame,.site-footer,.rank-inspector{display:none}.tab-panel[hidden]{display:block}.model-detail{border:0}body{background:white;color:black}.shell{max-width:none}.page-intro{padding-top:0}}
[hidden]{display:none!important}