:root{color-scheme:dark;--bg:#121616;--panel:#171c1c;--line:rgba(206,211,203,.15);--text:#f0efe9;--muted:#a0aaa7;--gold:#c4a568;--soft:#d8c59e}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:Manrope,Arial,sans-serif;font-size:14px;-webkit-font-smoothing:antialiased}button,input,a{-webkit-tap-highlight-color:transparent}button{font:inherit;cursor:pointer}button:focus-visible,a:focus-visible,input:focus-visible{outline:2px solid var(--gold);outline-offset:5px}button:disabled{cursor:wait;opacity:.6}.topbar{height:98px;padding:0 4%;display:flex;align-items:center;justify-content:space-between;gap:20px;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:15px;color:var(--text);text-decoration:none;white-space:nowrap}.brand img{width:65px;height:65px;object-fit:contain}.brand span{font-size:19px;letter-spacing:4px;font-weight:700}.brand b{font-weight:400;color:#b1bab6}.chapter{display:flex;align-items:center;gap:17px;color:var(--muted);font-size:12px}.chapter>span:first-child{letter-spacing:2px;font-size:10px}.chapter-divider{height:17px;width:1px;background:var(--line)}.preview-badge{font-size:11px;border:1px solid var(--line);padding:8px 12px;color:#b6c0b9;display:flex;align-items:center;gap:9px;white-space:nowrap}.preview-badge i{width:5px;height:5px;border-radius:50%;background:var(--gold)}main{display:grid;grid-template-columns:minmax(260px,29%) minmax(0,1fr);max-width:1800px;margin:auto}.editorial{padding:56px 34px 30px 14%;border-right:1px solid var(--line);position:relative}.eyebrow{font-size:9px;letter-spacing:2px;color:var(--gold);display:flex;align-items:center;gap:12px;margin:0 0 30px}.eyebrow>span{width:25px;height:1px;background:var(--gold)}h1{font-family:Prata,Georgia,serif;font-size:clamp(34px,3.45vw,64px);font-weight:400;line-height:1.18;letter-spacing:-1.4px;margin:0 0 24px}h1 em{font-style:normal;color:var(--gold)}.lede{font-size:17px;line-height:1.65;margin:0 0 16px;color:#e3e4de}.intro{color:var(--muted);font-size:12px;line-height:1.85;max-width:260px;margin:0 0 32px}.engine-spec{border-top:1px solid var(--line);padding-top:22px}.engine-spec>span{font-size:8px;letter-spacing:1.8px;color:var(--gold)}.engine-spec strong{font-size:16px;display:block;font-weight:500;margin-top:9px}.engine-spec p{font-size:11px;color:var(--muted);margin:9px 0 0}.engine-spec i{font-style:normal;color:#56615e;padding:0 6px}.selected-part{margin-top:32px;padding-top:22px;border-top:1px solid var(--line);min-height:171px}.part-topline{display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:8px;letter-spacing:1.7px;color:var(--gold)}.detail-dot{width:4px;height:4px;border-radius:50%;background:var(--gold)}.selected-part h2{font-size:16px;font-weight:500;margin:13px 0 9px}.selected-part p{font-size:11px;line-height:1.85;color:var(--muted);margin:0}.selected-part button{font-size:10px;background:none;color:var(--gold);padding:12px 0 0;border:none}.selected-part button span{padding-left:8px}.model-note{margin:27px 0 0;font-size:9px;line-height:1.8;color:#73807b}.studio{min-width:0;position:relative;display:flex;flex-direction:column;background:radial-gradient(ellipse at 52% 40%,#262e2e 0%,#171e1e 42%,#111717 78%)}.stage-top{z-index:2;padding:25px 30px 0;display:flex;align-items:center;justify-content:space-between;gap:14px;color:var(--muted);font-size:9px;letter-spacing:1.6px}.stage-top>div{display:flex;gap:18px;align-items:center}.text-control{color:var(--muted);background:none;border:0;font-size:10px;padding:8px 0;letter-spacing:0}.text-control:hover,.text-control[aria-pressed=true]{color:var(--gold)}#fullscreen{font-size:23px;line-height:1;padding:0 0 0 10px;border-left:1px solid var(--line)}#viewport{position:relative;height:clamp(400px,40vw,660px);min-height:380px;flex:1;isolation:isolate;touch-action:none;overflow:hidden}#viewport canvas{display:block;width:100%;height:100%;cursor:grab;outline:none}#viewport canvas:active{cursor:grabbing}#loading{position:absolute;inset:0;z-index:3;display:grid;align-content:center;justify-items:center;background:radial-gradient(ellipse,#263030,#141a1a);transition:opacity .5s}#loading.loaded{opacity:0;pointer-events:none}#loading p{color:var(--muted);font-size:11px;margin-top:24px;letter-spacing:1px}.load-orbit{border:1px solid #39463f;border-top-color:var(--gold);width:38px;height:38px;border-radius:50%;animation:orbit 1.2s linear infinite}@keyframes orbit{to{transform:rotate(360deg)}}#canvas-fallback{position:absolute;top:40%;left:12%;right:12%;text-align:center;color:var(--gold)}#labels{position:absolute;inset:0;pointer-events:none;overflow:hidden}.part-label{position:absolute;display:flex;align-items:center;gap:7px;color:#dedbd1;font-size:9px;white-space:nowrap;transform:translate(-50%,-50%);text-shadow:0 1px 8px #000;opacity:0;transition:opacity .18s}.part-label:before{content:'';width:5px;height:5px;background:var(--gold);border:2px solid #3f3c2a;border-radius:50%;box-shadow:0 0 0 4px #c4a5681a}.part-label span{padding:6px 8px;border:1px solid #c4a5683a;background:#17201ce6;backdrop-filter:blur(5px)}.stage-caption{margin:0 30px;display:flex;justify-content:space-between;gap:10px;color:#85938e;font-size:9px;line-height:1.5}.drag-symbol{font-size:14px;margin-right:7px;color:var(--gold)}.explosion-control{display:grid;grid-template-columns:minmax(180px,38%) 1fr;gap:29px;padding:24px 30px 22px;align-items:center}.primary-action{border:1px solid var(--gold);padding:18px 20px;background:var(--gold);color:#18201b;font-size:12px;font-weight:600;display:flex;justify-content:space-between;gap:15px;align-items:center;transition:background .2s}.primary-action:hover{background:#d8bb80}.primary-action>span:last-child{font-size:18px}.slider-labels{display:flex;justify-content:space-between;align-items:center;font-size:10px;color:#ced3cb}.slider-labels output{font-size:17px;color:var(--gold);font-variant-numeric:tabular-nums}.slider-labels output span{font-size:9px;margin-left:3px;color:#7e8a81}input[type=range]{display:block;width:100%;margin:14px 0 11px;height:3px;appearance:none;background:linear-gradient(to right,var(--gold) var(--progress,0%),#3c4640 var(--progress,0%));border-radius:0;cursor:ew-resize}input[type=range]::-webkit-slider-thumb{appearance:none;width:11px;height:11px;border-radius:50%;background:var(--gold);box-shadow:0 0 0 5px #c4a56815}input[type=range]::-moz-range-thumb{width:11px;height:11px;border:0;border-radius:50%;background:var(--gold)}.range-ticks{display:flex;justify-content:space-between;font-size:8px;color:#819087}.parts-strip{display:flex;align-items:center;gap:18px;border-top:1px solid var(--line);padding:19px 30px 24px}.parts-label{font-size:8px;letter-spacing:1.6px;color:#819087;flex-shrink:0;max-width:60px;line-height:1.7}#part-buttons{display:flex;gap:6px;flex-wrap:wrap}#part-buttons button{border:1px solid #4e5b504d;color:#b1beb3;background:transparent;padding:7px 10px;font-size:9px;line-height:1.4;transition:all .2s}#part-buttons button:hover{border-color:#bd9e60;color:#dcc388}#part-buttons button[aria-pressed=true]{background:#c4a56819;border-color:#c4a568;color:#e4ca91}footer{border-top:1px solid var(--line);padding:22px 4%;display:flex;justify-content:space-between;gap:20px;font-size:8px;color:#7b8881;letter-spacing:1.4px}footer i{font-style:normal;margin:0 8px}.studio:fullscreen{height:100vh;width:100vw}.studio:fullscreen #viewport{height:auto;flex:1}.studio:fullscreen .parts-strip{padding-bottom:25px}body.selecting-part #viewport canvas{cursor:pointer}[hidden]{display:none!important}@media(min-width:1600px){.editorial{padding-top:76px}.intro{font-size:14px}.lede{font-size:20px}.selected-part p{font-size:13px}.model-note{font-size:11px}.stage-top{font-size:11px}.text-control{font-size:12px}.primary-action{font-size:14px}}@media(max-width:1000px){.chapter{display:none}main{grid-template-columns:250px 1fr}.editorial{padding:38px 25px}.stage-top{padding:19px 20px 0;letter-spacing:.9px}.stage-top>div{gap:12px}.explosion-control{padding:22px 20px;gap:18px;grid-template-columns:1fr}.primary-action{padding:12px 18px}.parts-strip{padding:17px 20px}.stage-caption{margin:0 20px}.stage-caption>span:last-child{display:none}#viewport{min-height:360px;height:440px}.selected-part{margin-top:25px}.eyebrow{font-size:8px;letter-spacing:1px}footer span:nth-child(2){display:none}}@media(max-width:700px){.topbar{height:77px;padding:0 20px}.brand img{width:47px;height:47px}.brand{gap:10px}.brand span{font-size:14px;letter-spacing:2.7px}.preview-badge{padding:6px 8px;font-size:9px}main{display:flex;flex-direction:column}.editorial{padding:30px 20px 25px;border-right:0;border-bottom:1px solid var(--line);display:grid;grid-template-columns:1fr 1fr;gap:0 20px}.eyebrow{grid-column:1/-1;margin-bottom:15px}h1{font-size:36px;line-height:1.1;margin-bottom:0;grid-row:2/4;letter-spacing:-1px}.lede{font-size:12px;margin:4px 0 7px;line-height:1.6}.intro{font-size:10px;line-height:1.65;margin-bottom:0}.engine-spec{display:none}.selected-part{grid-column:1/-1;min-height:0;margin-top:24px;padding-top:16px}.selected-part h2{margin:9px 0 7px;font-size:14px}.selected-part p{font-size:11px;line-height:1.7}.part-topline{font-size:8px}.model-note{display:none}.stage-top{padding-top:12px;font-size:8px}.stage-top>div{gap:14px}.text-control{font-size:10px}#viewport{height:440px;min-height:360px}.stage-caption{font-size:8px}.explosion-control{grid-template-columns:1fr;gap:20px;padding-top:20px}.primary-action{padding:15px 17px}.parts-strip{align-items:flex-start;padding-bottom:22px;gap:13px}.parts-label{margin-top:5px;font-size:7px;max-width:49px}#part-buttons button{padding:10px 10px;min-height:36px;font-size:10px}footer{padding:20px;font-size:7px;letter-spacing:1px}.studio:fullscreen #viewport{min-height:0}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.01ms!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}
/* Public-page navigation and reliable no-WebGL fallback. */
.chapter a,footer a{color:inherit;text-decoration:none}.chapter a:hover,footer a:hover{color:var(--gold)}
#fallback-image{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;opacity:.55}
#canvas-fallback{top:auto;bottom:8%;z-index:4;padding:16px;background:#121616ed;border:1px solid var(--line);font-size:12px;line-height:1.6}
#canvas-fallback button,#canvas-fallback a{display:inline-block;margin:5px 8px;padding:8px 10px;border:1px solid var(--line);background:transparent;color:var(--gold);text-decoration:none;font-size:11px}
.viewer-unavailable canvas,.viewer-unavailable #labels{display:none!important}.no-script{position:absolute;z-index:4;bottom:20px;margin:20px;background:#121616ed;padding:15px;font-size:12px}.no-script a{color:var(--gold)}
footer a{font-size:10px;letter-spacing:.5px}@media(max-width:700px){footer{flex-wrap:wrap;gap:14px}footer a{font-size:9px}}

@media(max-width:700px){.engine-spec{display:block;grid-column:1/-1;margin-top:18px;padding-top:14px}.engine-spec>span{display:none}.engine-spec strong{font-size:14px;margin:0}.engine-spec p{margin-top:7px}.model-note{display:block;grid-column:1/-1;margin-top:12px;font-size:9px}.model-note br{display:none}}

/* Both engine variants remain independently explorable. */
.model-switch{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:24px}
.model-switch a{display:flex;flex-direction:column;gap:6px;padding:14px 10px;border:1px solid #414844;text-decoration:none;color:#bdc4be;border-radius:3px;transition:background .2s,border-color .2s}
.model-switch strong{font-size:13px;font-weight:600}
.model-switch span{font-size:10px;white-space:nowrap;color:#9da69e}
.model-switch a:hover{border-color:#bda879;background:#202724}
.model-switch a[aria-current="page"]{border-color:#bda879;background:#bda87916;color:#ecd9a9}
.model-switch a:focus-visible{outline:2px solid #ecd9a9;outline-offset:3px}
.model-switch+.engine-spec{margin-top:22px}
@media(max-width:700px){.model-switch{grid-column:1/-1;margin-top:18px}.model-switch a{padding:13px 15px}.model-switch strong{font-size:14px}.model-switch span{font-size:11px}.model-switch+.engine-spec{margin-top:16px}}