.lab-demo{background:var(--panel);border:1px solid var(--hairline);border-radius:12px;flex-direction:column;min-height:540px;display:flex;position:relative;overflow:hidden}.lab-demo-header{border-bottom:1px solid var(--hairline);background:var(--panel-2);justify-content:space-between;align-items:center;gap:12px;padding:10px 16px;display:flex}.lab-demo-title{font-family:var(--font-mono);letter-spacing:.06em;color:var(--text);font-size:11px;font-weight:600}.lab-demo-meta{font-family:var(--font-mono);letter-spacing:.12em;color:var(--muted);font-size:10px}.lab-demo-footer{border-top:1px solid var(--hairline);font-family:var(--font-mono);letter-spacing:.08em;color:var(--muted);padding:8px 16px;font-size:10px}.lab-demo-stage{flex:1;min-height:240px;position:relative}.lab-demo-stage--center{justify-content:center;align-items:center;padding:24px;display:flex}.lab-demo-mount{position:absolute;inset:0}.lab-demo-mount canvas,.lab-demo-canvas{touch-action:pan-y;width:100%;height:100%;position:absolute;inset:0}.lab-demo-canvas--crosshair{cursor:crosshair}.lab-diffraction-canvas{width:340px;max-width:100%;height:340px;image-rendering:pixelated;border:1px solid var(--hairline);border-radius:8px}.lab-overlay-canvas{aspect-ratio:640/300;border:1px solid var(--hairline);background:var(--art-bg);border-radius:8px;width:min(640px,100%)}.lab-legend{border-top:1px solid var(--hairline);font-family:var(--font-mono);color:var(--muted);flex-wrap:wrap;gap:10px 18px;padding:12px 16px;font-size:10px;display:flex}.lab-legend-item{align-items:center;gap:7px;display:inline-flex}.lab-legend-chip{border-radius:3px;flex-shrink:0;width:10px;height:10px}.lab-demo-controls{border-top:1px solid var(--hairline);grid-template-columns:repeat(3,1fr);gap:12px;padding:14px 16px;display:grid}.lab-demo-controls--2{grid-template-columns:repeat(2,1fr)}.lab-control{border:1px solid var(--hairline);background:var(--panel-2);border-radius:10px;padding:12px}.lab-control-label{font-family:var(--font-mono);letter-spacing:.1em;color:var(--muted);margin-bottom:8px;font-size:10px}.lab-control-row{font-family:var(--font-mono);color:var(--text);justify-content:space-between;gap:8px;margin-bottom:6px;font-size:10px;display:flex}.lab-control-row span:first-child{color:var(--muted)}.lab-btn-group{flex-wrap:wrap;gap:6px;display:flex}.lab-btn{border:1px solid var(--hairline-strong);font-family:var(--font-mono);letter-spacing:.08em;color:var(--muted);border-radius:6px;padding:4px 10px;font-size:10px;transition:color .2s,border-color .2s,background .2s}.lab-btn:hover{color:var(--text);border-color:rgba(var(--text-rgb), .34)}.lab-btn.is-active{color:var(--accent);border-color:rgba(var(--accent-rgb), .55);background:var(--accent-soft)}.lab-range{-webkit-appearance:none;appearance:none;background:var(--hairline-strong);cursor:pointer;border-radius:999px;width:100%;height:4px}.lab-range::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;background:var(--accent);border-radius:50%;width:12px;height:12px}.lab-range::-moz-range-thumb{background:var(--accent);border:none;border-radius:50%;width:12px;height:12px}.lab-note{border:1px dashed var(--hairline-strong);color:var(--muted);border-radius:10px;margin:0 16px 16px;padding:12px;font-size:11px;line-height:1.7}.lab-shader-body{flex:1;grid-template-columns:1fr 1fr;gap:16px;min-height:0;padding:16px;display:grid}.lab-shader-editor{flex-direction:column;gap:10px;min-width:0;display:flex}.lab-editor{width:100%;min-height:300px;font-family:var(--font-mono);background:var(--panel-2);color:var(--text);border:1px solid var(--hairline);resize:none;border-radius:10px;flex:1;padding:12px;font-size:11px;line-height:1.7;transition:border-color .2s}.lab-editor:focus{border-color:rgba(var(--accent-rgb), .55);outline:none}.lab-error{color:#f87171;font-family:var(--font-mono);word-break:break-all;background:#f871710f;border:1px solid #f8717140;border-radius:8px;padding:8px 10px;font-size:10px}.lab-shader-preview{border:1px solid var(--hairline);background:var(--art-bg);border-radius:10px;min-height:300px;position:relative;overflow:hidden}.lab-resources{border:1px dashed var(--hairline-strong);border-radius:10px;margin:0 16px 16px;padding:14px 16px}.lab-resources h3{font-family:var(--font-mono);color:var(--text);margin:0 0 8px;font-size:12px;font-weight:600}.lab-resources-grid{font-family:var(--font-mono);grid-template-columns:repeat(2,1fr);gap:6px;font-size:10px;display:grid}.lab-resources-grid a{color:var(--muted);text-overflow:ellipsis;white-space:nowrap;transition:color .2s;overflow:hidden}.lab-resources-grid a:hover{color:var(--accent)}.lab-resources-note{font-family:var(--font-mono);color:var(--muted);opacity:.75;margin-top:8px;font-size:9px}.lab-resources-note code{color:var(--text-dim)}@media (width<=720px){.lab-demo{min-height:400px}.lab-demo-controls,.lab-demo-controls--2,.lab-shader-body,.lab-resources-grid{grid-template-columns:1fr}}