:root{--bg:#15191a;--surface:#1c2121;--line:#323938;--text:#ecece6;--soft:#b7bcb5;--muted:#808a84;--accent:#d9b77b;--accent-bright:#f3d7a2;--sans:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;--serif:Georgia,'Times New Roman',serif;color-scheme:dark}
*{box-sizing:border-box}html,body{margin:0;min-height:100%;background:var(--bg);color:var(--text);font-family:var(--sans)}button,input,select{font:inherit}button{cursor:pointer}button:focus-visible,input:focus-visible,select:focus-visible,a:focus-visible{outline:2px solid var(--accent-bright);outline-offset:3px}a{color:inherit;text-decoration:none}.app{min-height:100vh;display:flex;flex-direction:column}.topbar{height:78px;min-height:78px;display:flex;align-items:center;justify-content:space-between;padding:0 29px;border-bottom:1px solid #343b39;background:#1a1e1e;gap:14px}.brand{display:flex;align-items:center;gap:13px}.brand-mark{height:45px;width:45px;display:flex;align-items:center;justify-content:center;background:#ad9066;color:#15191a;position:relative;font:italic bold 34px var(--serif);border-radius:4px}.brand-mark small{position:absolute;bottom:2px;right:4px;font:700 9px var(--sans)}.brand-title{font:23px var(--serif);letter-spacing:-.5px;white-space:nowrap}.brand-title span{color:#dfb57c}.brand-sub{font-size:9px;letter-spacing:2px;font-weight:750;color:#a4aa9d;margin-top:4px}.version{color:var(--accent);margin-left:7px}.top-actions{display:flex;align-items:center;gap:12px;font-size:12px;color:#a8b3a9}.live-dot,.pulsing-dot{width:7px;height:7px;background:#87b9a1;border-radius:100%;display:inline-block;box-shadow:0 0 0 3px #80ab9460}.live-dot.bad{background:#d88c80;box-shadow:0 0 0 3px #ad514e66}.source-link{margin-left:15px;border:1px solid #3f4743;border-radius:6px;padding:11px 15px;color:#e4e5db;font-size:12px;white-space:nowrap}.source-link:hover{border-color:var(--accent)}.source-link span{color:var(--accent)}.workspace{display:grid;grid-template-columns:minmax(0,1fr) 356px;flex:1;min-height:0}.viewport-area{min-width:0;display:flex;flex-direction:column;position:relative}.viewport-header{padding:25px 33px 22px;display:flex;align-items:center;justify-content:space-between;gap:20px}.eyebrow{font-size:10px;letter-spacing:1.85px;color:#c1a77e;font-weight:800}.viewport-header h1{font:normal clamp(29px,3vw,42px)/1.1 var(--serif);letter-spacing:-1px;margin:11px 0 5px}.viewport-header p{color:#a2aaa6;font-size:13px;margin:0}.camera-actions{display:flex;gap:8px}.camera-actions button{background:#232b2a;border:1px solid #3c4945;color:#c9d1c9;padding:10px 12px;border-radius:6px;font-size:12px;white-space:nowrap}.camera-actions button:hover{background:#3d4641}.canvas-shell{position:relative;flex:1;min-height:410px;overflow:hidden;background:radial-gradient(ellipse at 50% 40%,#28302e 0%,#1a2121 55%,#141a1a 100%);border-top:1px solid #303a37;border-bottom:1px solid #303a37}.canvas-shell canvas{display:block;width:100%;height:100%;position:absolute;inset:0;touch-action:none;cursor:grab;z-index:1}.canvas-shell canvas:active{cursor:grabbing}.scene-grid{position:absolute;inset:0;pointer-events:none;background-image:linear-gradient(to right,#8a9e8411 1px,transparent 1px),linear-gradient(to bottom,#8a9e8411 1px,transparent 1px);background-size:36px 36px;mask-image:linear-gradient(to top,#000 0%,#0000 65%)}.scene-badge{position:absolute;left:25px;top:23px;background:#1b2623e8;color:#c9d2c7;border:1px solid #405149aa;border-radius:5px;z-index:2;padding:10px 11px;font-size:9px;letter-spacing:1.3px;font-weight:700;display:flex;align-items:center;gap:11px}.view-label{position:absolute;right:22px;top:25px;color:#9dac9e;letter-spacing:1.8px;font-size:9px;z-index:2;font-weight:700}.scene-help{position:absolute;right:23px;bottom:22px;font-size:11px;color:#afb9ae;z-index:2;text-shadow:0 1px 5px #141919}.scene-help span{color:var(--accent);padding:0 7px}.error-banner{position:absolute;left:20%;right:20%;top:40%;background:#412e2b;color:#fce1d0;padding:18px 20px;border:1px solid #ba7770;border-radius:8px;z-index:4}.bottom-panel{background:#1a201f}.transport{display:flex;align-items:center;gap:24px;padding:20px 25px 18px}.transport-left{display:flex;align-items:center;gap:9px}.transport-button{width:33px;height:38px;border:none;background:none;color:#aab4ab;font-size:13px}.transport-button:hover{color:var(--accent)}.play-button{background:#dab77d;border:0;border-radius:7px;color:#1f2521;font-size:16px;width:47px;height:47px;box-shadow:0 0 0 4px #d8b47711}.play-button:hover{background:#efcc90}.transport-center{flex:1;min-width:0}.timeline-label{display:flex;justify-content:space-between;font-size:12px;margin-bottom:11px;gap:8px}.timeline-label span:first-child{color:#e8e7df;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.timeline-label span:last-child{font-size:11px;color:#c5b18c;white-space:nowrap}.transport-center input[type=range]{width:100%;appearance:none;background:#3e4b45;height:5px;border-radius:5px;outline:none;display:block}.transport-center input[type=range]::-webkit-slider-thumb{appearance:none;width:14px;height:14px;background:#edc88f;border:3px solid #1b2521;border-radius:50%;box-shadow:0 0 0 2px #d6b47f;cursor:pointer}.timeline-phases{display:flex;justify-content:space-between;gap:3px;margin-top:11px}.timeline-phases button{border:0;background:none;color:#78847c;font-size:10px;padding:4px 0;white-space:nowrap}.timeline-phases button:hover,.timeline-phases button.active{color:var(--accent)}.transport-right select{background:#2a3431;color:#d4d8d0;border:1px solid #44534b;border-radius:6px;padding:9px}.inspector{border-left:1px solid #36403c;background:#1e2423;min-height:0;display:flex;flex-direction:column;overflow-y:auto}.panel-heading{padding:29px 25px 22px;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid #333d39;gap:6px}.panel-heading h2{font:25px var(--serif);margin:9px 0 0}.inspector-badge{font-size:9px;letter-spacing:1.1px;color:#d5bb88;border:1px solid #776a4c;padding:6px 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var(--serif);color:#eed5a4;display:block}.metric span{font-size:11px;color:#9faa9e}.layer-list{padding:0 25px 7px}.layer{display:flex;align-items:center;gap:9px;padding:11px 0;border-bottom:1px solid #333d37;font-size:12px;color:#d5d9d0;cursor:pointer}.layer input{accent-color:#dabb85;cursor:pointer}.layer i{width:11px;height:11px;border:1px solid #ffffff45;border-radius:2px;background:var(--swatch)}.layer span{flex:1}.layer small{color:#9ca89b;font-variant-numeric:tabular-nums}.operation-card{margin:0 25px 4px;background:#242d29;border:1px solid #435044;border-radius:7px;padding:15px}.operation-head{display:flex;justify-content:space-between;align-items:center;gap:6px}.kind{font-size:10px;letter-spacing:1.1px;color:#e4c189;font-weight:800}.op-num{font-size:10px;color:#899b8e}.operation-card h3{font:20px var(--serif);margin:14px 0 8px;overflow-wrap:anywhere}.operation-card p{font-size:12px;line-height:1.65;color:#b9c3b6;margin:0}.operation-meta{display:flex;justify-content:space-between;border-top:1px solid #3b483e;margin-top:16px;padding-top:12px;font-size:9px;color:#9ba89a;letter-spacing:.6px}.operation-meta b{color:#e9d0a1;margin-left:5px;font-size:12px}.selection-card{margin:0 25px 25px;padding:14px;border:1px solid #3f4d43;background:#202925;border-radius:6px;font-size:12px;color:#b4c1b5;line-height:1.6;overflow-wrap:anywhere}.selection-card p{margin:0}.selection-card h4{margin:0 0 10px;font:19px var(--serif);color:#f1e8d8}.selection-card dl{margin:0;display:grid;grid-template-columns:95px 1fr;gap:7px}.selection-card dt{color:#86988c}.selection-card dd{margin:0;color:#e1dfd3}.selection-card button{margin-top:12px;background:#4d4432;color:#ead09b;border:1px solid #83704a;border-radius:5px;padding:8px;font-size:11px}.inspector-footer{padding:16px 25px 20px;border-top:1px solid #37413a;margin-top:auto;display:flex;justify-content:space-between;gap:10px;font-size:9px;color:#819186}.inspector-footer b{color:#d3b27c}.muted{color:#89978d}
@media(min-height:1050px){.canvas-shell{min-height:580px}}
@media(max-width:1050px){.workspace{grid-template-columns:minmax(0,1fr) 305px}.inspector .panel-heading,.scenario{padding-left:18px;padding-right:18px}.metric-grid,.layer-list,.operation-card,.selection-card{margin-left:18px;margin-right:18px}.section-label{padding-left:18px}.transport{gap:13px;padding:16px}.transport-left{gap:2px}.timeline-phases button{font-size:9px}.viewport-header{padding:24px 19px}}
@media(max-width:800px){.topbar{height:68px;min-height:68px;padding:0 14px}.brand-mark{height:39px;width:39px}.brand-title{font-size:20px}.brand-sub{font-size:8px}.status{display:none}.top-actions{gap:2px}.live-dot.bad{background:#d88c80;box-shadow:0 0 0 3px #ad514e66}.source-link{margin-left:8px;padding:9px}.workspace{display:flex;flex-direction:column}.viewport-header{padding:20px 16px 16px}.viewport-header h1{font-size:30px}.viewport-header p{font-size:11px}.camera-actions{flex-direction:column}.camera-actions button{font-size:11px;padding:8px}.canvas-shell{height:52vh;min-height:320px;flex:none}.scene-help{font-size:10px;left:15px;right:15px;bottom:14px;text-align:center}.scene-badge{top:13px;left:12px;font-size:8px;padding:7px}.view-label{right:10px;top:16px;font-size:8px}.transport{flex-wrap:wrap;gap:11px;padding:16px 12px}.transport-left{order:1;flex:1;justify-content:flex-start}.transport-center{order:3;flex:0 0 100%}.transport-right{order:2}.timeline-phases button{font-size:9px}.inspector{border-left:0;border-top:1px solid #39433c;overflow:visible}.panel-heading{padding:20px 18px 16px}.scenario{padding:17px 18px}.metric-grid{grid-template-columns:repeat(4,1fr)}.metric{padding:11px 8px}.metric strong{font-size:23px}.metric span{font-size:9px}.inspector-footer{min-height:55px}.selection-card{margin-bottom:18px}}
@media(max-width:430px){.metric-grid{grid-template-columns:1fr 1fr}.camera-actions button span{display:none}.camera-actions{flex-direction:row}.camera-actions button{font-size:18px;padding:7px 11px}.viewport-header h1{font-size:28px}.brand-title{font-size:18px}.source-link{font-size:10px}.scene-help{font-size:9px}.timeline-phases button{font-size:8px;letter-spacing:-.2px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}}


.method-current,.method-library{margin:10px 20px 13px;border:1px solid #3d4a43;border-radius:9px;background:#232c28;overflow:hidden}
.method-current>summary,.method-library>summary,.method-list details>summary{cursor:pointer;padding:12px 14px;color:#edd7b1;font-size:12px;line-height:1.4}
.method-library>summary{color:#bfcdbd}
.method-list{max-height:390px;overflow-y:auto;padding:0 10px 10px}
.method-list details{border-top:1px solid #38433e}
.method-list details>summary{color:#c8cdc1}
.method-list summary small{float:right;color:#b39c73;font-size:9px}
.method-content{padding:6px 14px 15px;color:#bac3b9;font-size:11px;line-height:1.5;overflow-wrap:anywhere}
.method-content p{margin:8px 0}.method-content strong{color:#e3dfd2}
.method-content ol,.method-content ul{padding-left:19px;margin:5px 0 12px}
.method-content li{margin:6px 0}.method-content li span{display:block;color:#a4b4a7}
.method-content a{color:#e0b879;text-decoration:underline;text-underline-offset:2px}
.method-status{font-size:10px;text-transform:uppercase;letter-spacing:.07em;color:#c6b38f}
.method-warning{font-size:11px;color:#d1b993;line-height:1.5;margin:9px}
@media(max-width:800px){.method-current,.method-library{margin-left:18px;margin-right:18px}}

/* Technique gallery: selectable 3D studies on the same orbitable canvas. */
.demo-toolbar{display:flex;align-items:center;gap:12px;padding:6px 22px 10px;background:#1c2220}
.demo-toolbar label{font-size:10px;color:#b69c73;letter-spacing:.11em;white-space:nowrap;font-weight:750}
.demo-toolbar select{flex:1;max-width:650px;min-width:0;background:#2a3431;color:#eee2cb;border:1px solid #536053;border-radius:7px;padding:11px;font-size:13px}
.demo-note{padding:8px 22px 12px;font-size:11px;line-height:1.5;color:#bccbbd;background:#1c2220}
.demo-note.excerpt{color:#b8ccbe}.demo-note.concept{color:#ebc18b;font-weight:650}
@media(max-width:800px){.demo-toolbar{padding:4px 17px 10px}.demo-note{padding:8px 17px 12px}}

/* Three.js WebGL canvas sits atop the legacy 2D fallback. The original scene
   canvas retains all pointer/touch/wheel listeners for identical mobile UX. */
.canvas-shell #scene-three{pointer-events:none;z-index:2;visibility:hidden;}
.canvas-shell #scene-three.active{visibility:visible;}
.engine-label{position:absolute;top:15px;right:17px;z-index:5;pointer-events:none;
 color:#c4d7c5;background:#1a2420bf;border:1px solid #43554899;border-radius:5px;
 padding:5px 8px;font-size:9px;letter-spacing:.09em;font-weight:650}
@media(max-width:600px){.engine-label{top:51px;right:12px;font-size:8px}}