/* Native CSS for a local interactive studio, preserving the existing static gallery stack. */
:root{color-scheme:light;--paper:#f4f5f6;--ink:#20262a;--muted:#58636b;--line:#d9dee2;--accent:#285a4b;--radius:12px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font:14px/1.6 "Avenir Next","PingFang SC","Microsoft Yahei",sans-serif}button,a,input{-webkit-tap-highlight-color:transparent}button,input{font:inherit}button{cursor:pointer}a{color:inherit;text-underline-offset:4px}button:active{transform:scale(.98)}button:focus-visible,a:focus-visible,input:focus-visible,canvas:focus-visible{outline:3px solid #528d77;outline-offset:4px}.site-header{height:72px;padding:0 4vw;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);gap:24px}.wordmark{font-size:13px;font-weight:750;letter-spacing:.04em;text-decoration:none;white-space:nowrap}.wordmark span{font-weight:450;color:var(--muted)}nav{display:flex;align-items:center;gap:25px;white-space:nowrap}nav a{text-decoration:none;font-size:13px}.text-button{background:none;border:0;padding:0;color:var(--muted);font-size:13px;white-space:nowrap}.studio{max-width:1500px;margin:0 auto;padding:28px 4vw 24px;display:grid;grid-template-columns:270px minmax(0,1fr);gap:38px}.control-panel{display:flex;flex-direction:column;min-width:0;padding:7px 0 0}.small-label{font-size:10px;letter-spacing:.13em;font-weight:650;color:var(--accent)}h1{font-size:45px;line-height:1.17;letter-spacing:-1.7px;font-weight:650;margin:20px 0 17px}.intro p{font-size:14px;line-height:1.9;color:var(--muted);margin:0}.controls{margin-top:29px;display:grid;gap:23px}fieldset{border:0;padding:0;margin:0;min-width:0}legend{font-size:12px;margin-bottom:9px;color:var(--muted)}.mode-buttons{display:grid;grid-template-columns:1fr 1fr;gap:7px}.mode{background:transparent;border:1px solid var(--line);color:var(--ink);border-radius:var(--radius);padding:11px 8px;text-align:left;font-size:13px;font-weight:600;white-space:nowrap}.mode span{display:block;font-size:10px;font-weight:450;color:var(--muted);margin-top:3px}.mode.active{background:var(--ink);border-color:var(--ink);color:white}.mode.active span{color:#d9e0e3}.button-row{display:flex;flex-wrap:wrap;gap:7px}.chip,.swatch{border:1px solid var(--line);background:transparent;border-radius:8px;padding:7px 11px;font-size:12px;line-height:1.5;white-space:nowrap;color:var(--ink)}.chip.active,.swatch.active{background:#e2ebe6;border-color:#a3b9ae;color:#254d3f}.swatch{display:flex;align-items:center;gap:6px;padding:7px 8px}.swatch i{width:14px;height:14px;background:var(--swatch);border:1px solid #9da8ac;border-radius:50%;display:block}.utility-row{display:flex;gap:7px;align-items:center}.utility-row .text-button{margin-left:auto}.prototype-note{font-size:11px;line-height:1.8;color:var(--muted);border-top:1px solid var(--line);padding-top:15px;margin:28px 0 0;max-width:260px}.viewer-column{min-width:0}.viewer{height:clamp(510px,calc(100dvh - 170px),800px);position:relative;border:1px solid #dce1e5;border-radius:var(--radius);overflow:hidden;background:#e9edf0;isolation:isolate}#scene{display:block;width:100%;height:100%;touch-action:none;outline-offset:-4px}.viewer-top,.viewer-bottom{position:absolute;left:25px;right:25px;display:flex;justify-content:space-between;align-items:center;gap:12px;pointer-events:none;z-index:2}.viewer-top{top:22px;font-size:9px;font-weight:650;letter-spacing:.12em;color:#4d5960}.viewer-top span:last-child{font-size:9px}.viewer-bottom{bottom:20px;font-size:9px;letter-spacing:.05em;color:#4d5960}.viewer-bottom button{pointer-events:auto;background:rgba(244,245,246,.88);border:1px solid #bbc5cb;padding:6px 10px;border-radius:8px;color:#303c44;font-size:11px}.scene-caption{position:absolute;left:26px;bottom:61px;pointer-events:none;z-index:2;display:flex;flex-direction:column;color:#253039;font-size:clamp(19px,2.1vw,32px);font-weight:650;line-height:1.1;letter-spacing:-.04em}.transport{height:54px;display:flex;align-items:center;gap:15px}.transport button{border:0;border-radius:8px;color:white;background:var(--ink);font-size:11px;padding:7px 11px;white-space:nowrap}.transport input{min-width:0;flex:1;height:3px;accent-color:var(--accent)}.transport output{font-size:10px;white-space:nowrap;font-variant-numeric:tabular-nums;color:var(--muted);min-width:76px;text-align:right}.loading-state,.error-state{position:absolute;inset:0;background:#e9edf0;z-index:3;display:grid;place-content:center;text-align:center;padding:35px}.loading-state p{color:var(--muted);font-size:12px}.loading-form{width:67px;height:145px;margin:0 auto;background:#c9d1d7;border-radius:45% 45% 38% 38%;animation:breathe 1.1s ease-in-out infinite}.error-state p{max-width:400px}.error-state button{padding:10px 16px;margin:10px;border:1px solid var(--line);border-radius:8px;background:white}.error-state[hidden],.loading-state[hidden]{display:none}.explanation{max-width:1500px;margin:0 auto;padding:35px 4vw 70px;border-top:1px solid var(--line)}.explanation-title h2{font-size:24px;letter-spacing:-.5px;margin:0 0 7px;font-weight:600}.explanation-title p{color:var(--muted);margin:0;font-size:13px}.note-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:38px;margin:32px 0}.note-grid article{border-top:1px solid var(--line);padding-top:17px;position:relative}.note-number{font-size:11px;color:var(--accent)}h3{font-size:16px;font-weight:600;margin:9px 0}.note-grid p{font-size:12px;line-height:1.9;color:var(--muted);margin:0}.technical-details{border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:17px 0}.technical-details summary{cursor:pointer;font-size:13px}.technical-content{max-width:900px;padding-top:10px;font-size:12px;color:var(--muted);line-height:1.9}.technical-content strong{color:var(--ink)}.reference-links{display:flex;gap:25px;flex-wrap:wrap;padding:10px 0}.video-section{display:grid;grid-template-columns:1fr 260px;gap:40px;margin-top:40px;align-items:start}.video-section h3{font-size:24px;margin:0 0 9px}.video-section p{color:var(--muted);font-size:13px;margin-bottom:20px}.video-section a{font-size:13px}.video-section video{display:block;width:100%;max-height:460px;aspect-ratio:9/16;border-radius:var(--radius);background:#e9edf0}dialog{border:1px solid var(--line);border-radius:var(--radius);padding:22px;background:var(--paper);max-width:550px;width:calc(100vw - 32px);max-height:94dvh;overflow:auto}dialog::backdrop{background:rgba(20,30,37,.45)}.dialog-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:15px;gap:20px}.dialog-header h2{font-size:18px;font-weight:600;margin:0}.dialog-header button{padding:6px 12px;background:white;border:1px solid var(--line);border-radius:8px}dialog img{display:block;width:100%;max-height:65dvh;object-fit:contain;border-radius:8px}dialog p{font-size:12px;line-height:1.8;color:var(--muted)}.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}@keyframes breathe{50%{opacity:.4;transform:scale(.98)}}@media(min-width:1600px){.studio{padding-left:30px;padding-right:30px}}
@media(max-width:1100px){.studio{grid-template-columns:235px minmax(0,1fr);gap:24px;padding-left:3vw;padding-right:3vw}h1{font-size:39px}.controls{gap:20px}.chip{padding:7px 9px}.swatch{padding:7px}.viewer{height:600px}.note-grid{gap:24px}}
@media(max-width:767px){.site-header{height:60px;padding:0 18px;gap:10px}.wordmark{font-size:11px}.wordmark span{display:none}nav{gap:15px}nav a,.text-button{font-size:11px}.studio{padding:21px 16px 15px;grid-template-columns:1fr;gap:18px}.control-panel{display:contents}.intro{display:grid;grid-template-columns:1fr 1.1fr;column-gap:20px;align-items:end}.small-label{grid-column:1/-1;font-size:9px;margin-bottom:12px}h1{font-size:30px;line-height:1.18;margin:0;letter-spacing:-1px}.intro p{font-size:11px;line-height:1.85;margin:0 0 2px}.viewer-column{grid-row:2}.viewer{height:530px;max-height:70dvh;min-height:420px}.controls{grid-row:3;margin:0;display:grid;grid-template-columns:1fr 1fr;gap:18px 14px}.controls fieldset:first-child{grid-column:1/-1}.mode-buttons{grid-template-columns:1fr 1fr}.mode{padding:9px 12px}.mode span{display:inline;margin-left:9px}.controls fieldset:nth-child(3){grid-column:1/-1}.utility-row{grid-column:1/-1}.prototype-note{grid-row:4;max-width:none;margin:0;padding-top:12px}.button-row{gap:5px}.chip{padding:7px 8px;font-size:11px}.swatch{padding:7px 12px}.viewer-top,.viewer-bottom{left:17px;right:17px;font-size:8px}.scene-caption{left:18px;bottom:61px;font-size:24px}.transport{gap:10px;height:49px}.explanation{padding:26px 20px 45px}.explanation-title h2{font-size:22px}.note-grid{grid-template-columns:1fr;gap:20px;margin:25px 0}.note-grid article{padding-top:12px}.note-grid h3{display:inline;margin-left:12px;font-size:15px}.note-grid p{margin-top:9px}.video-section{grid-template-columns:1fr;gap:20px}.video-section video{max-width:320px;max-height:none}.video-section h3{font-size:22px}.transport output{font-size:9px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.loading-form{animation:none}}
/* Deterministic vertical video capture uses the very same scene and model. */
body.capture{background:#e9edf0;width:1080px;height:1920px;overflow:hidden}
body.capture .site-header,body.capture .control-panel,body.capture .transport,body.capture .explanation{display:none}
body.capture .studio{display:block;padding:0;margin:0;width:1080px;height:1920px;max-width:none}
body.capture .viewer{width:1080px;height:1920px;max-height:none;min-height:0;border:0;border-radius:0}
body.capture .viewer-top{top:125px;left:88px;right:88px;font-size:17px}
body.capture .viewer-top span:last-child{display:none}
body.capture .viewer::after{content:"";position:absolute;top:0;left:0;right:0;height:365px;background:#e9edf0;z-index:1;pointer-events:none}
body.capture .scene-caption{top:190px;bottom:auto;left:88px;font-size:76px;line-height:1.04;letter-spacing:-3px}
body.capture .viewer-bottom{display:none}
body.capture #snapshot{display:none}
body.capture .prototype-note{display:none}
body:not(.capture) .viewer[data-mode="film"] .scene-caption{padding:12px 15px;background:rgba(244,245,246,.94);border-radius:10px}
@media(max-width:767px){.intro{grid-template-columns:1.2fr 1fr}h1{font-size:clamp(24px,7vw,30px)}.viewer[data-mode="inspect"] .scene-caption{display:none}}