:root{--bg: #050508;--ink: #dddfe3;--ink-dim: #7a808a;--line: rgba(255, 255, 255, .1);--panel: rgba(12, 12, 14, .92);--accent: #dddfe3;--accent-dim: #555a63}*{margin:0;padding:0;box-sizing:border-box}html,body{height:100%;overflow:hidden;background:var(--bg);color:var(--ink);font-family:system-ui,-apple-system,Segoe UI,sans-serif;font-size:13px;-webkit-font-smoothing:antialiased}#scene{position:fixed;top:0;right:0;bottom:0;left:0;display:block;touch-action:none}body:after{content:"";position:fixed;top:0;right:0;bottom:0;left:0;pointer-events:none;background:radial-gradient(ellipse at 50% 45%,transparent 55%,rgba(0,0,0,.5) 100%)}.hidden{display:none!important}.start-screen{position:fixed;top:0;right:0;bottom:0;left:0;display:grid;place-items:center;z-index:20;background:#00000040}.start-card{padding:10px;background:var(--panel);border:1px solid var(--line)}.start-buttons{display:flex;gap:8px}button{font:inherit;cursor:pointer;color:var(--ink);background:transparent;border:1px solid var(--line);padding:9px 16px;transition:background .12s,border-color .12s}button:focus-visible{outline:1px solid var(--ink-dim);outline-offset:2px}.btn-primary{background:var(--ink);border-color:var(--ink);color:#0a0a0c;font-weight:500}.btn-primary:hover:not(:disabled){background:#fff;border-color:#fff}.btn-primary:disabled{opacity:.45;cursor:wait}.btn-ghost:hover{border-color:var(--ink-dim);color:#fff}.start-note{margin-top:8px;font-size:11px;color:var(--ink-dim);min-height:1.3em;max-width:360px;line-height:1.35}.mobile-start-hint{display:none;margin-top:10px;max-width:320px;color:var(--ink-dim);font-size:12px;line-height:1.5}.overlay{position:fixed;top:0;right:0;bottom:0;left:0;pointer-events:none;z-index:10}.overlay>*{pointer-events:auto}.hud{position:absolute;top:14px;left:14px;padding:10px 12px;background:var(--panel);border:1px solid var(--line);min-width:150px}.hud-row{display:flex;justify-content:space-between;gap:16px;font-size:12px;line-height:1.65;font-variant-numeric:tabular-nums}.hud-label{color:var(--ink-dim)}.hud-state{transition:color .3s}.hud-keys{margin-top:8px;padding-top:6px;border-top:1px solid var(--line);font-size:10px;color:var(--accent-dim)}.panel{position:absolute;top:14px;right:14px;width:min(360px,calc(100vw - 28px));padding:14px 16px;background:var(--panel);border:1px solid var(--line)}.panel h2{font-size:13px;font-weight:500;color:var(--ink-dim);margin-bottom:10px}.panel table{width:100%;border-collapse:collapse;font-size:12px}.panel td{padding:4px 0;vertical-align:top;line-height:1.45}.panel td:first-child{color:var(--ink-dim);padding-right:14px;white-space:nowrap}.help-note{margin-top:8px;font-size:11px;color:var(--ink-dim)}.help-note code{color:var(--ink);font-family:ui-monospace,monospace;font-size:10.5px}.setting-row{display:flex;align-items:center;justify-content:space-between;padding:6px 0;font-size:12px}.seg{display:flex}.seg button{padding:5px 10px;font-size:11px;border-right-width:0}.seg button:last-child{border-right-width:1px}.seg button.active{background:var(--ink);border-color:var(--ink);color:#0a0a0c}.toggle{width:36px;height:18px;position:relative;padding:0;border-color:var(--accent-dim)}.toggle:after{content:"";position:absolute;top:2px;left:2px;width:12px;height:12px;background:var(--accent-dim);transition:transform .12s,background .12s}.toggle.on{border-color:var(--ink-dim)}.toggle.on:after{transform:translate(18px);background:var(--ink)}.setting-row em{font-style:normal;color:var(--ink-dim);margin-left:4px;font-variant-numeric:tabular-nums}input[type=range]{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:120px;height:1px;background:var(--line);outline:none}input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:10px;height:10px;background:var(--ink);cursor:pointer}input[type=range]::-moz-range-thumb{width:10px;height:10px;background:var(--ink);border:none;cursor:pointer;border-radius:0}input[type=range]:disabled{opacity:.35}input[type=range]:disabled::-webkit-slider-thumb{cursor:default}.param-root{margin-top:12px;border-top:1px solid var(--line);padding-top:8px}.param-root>summary,.param-group>summary{cursor:pointer;list-style:none;font-size:11px;color:var(--ink-dim);padding:3px 0;-webkit-user-select:none;user-select:none}.param-root>summary::-webkit-details-marker,.param-group>summary::-webkit-details-marker{display:none}.param-root>summary:before,.param-group>summary:before{content:"+ ";color:var(--accent-dim)}.param-root[open]>summary:before,.param-group[open]>summary:before{content:"− "}.param-body{max-height:46vh;overflow-y:auto;padding-right:4px}.param-group{margin:3px 0}.param-group>summary{font-size:10.5px}.param-row{display:grid;grid-template-columns:1fr 96px 42px;align-items:center;gap:8px;padding:2px 0 2px 8px;font-size:11px;color:var(--ink-dim)}.param-row input[type=range]{width:96px}.param-value{text-align:right;color:var(--ink);font-variant-numeric:tabular-nums}.param-reset{margin:8px 0 2px;width:100%;font-size:11px;padding:6px}.param-reset:hover{border-color:var(--ink-dim)}.param-hint{font-size:10px;color:var(--accent-dim);margin:6px 0 2px;line-height:1.4}.param-body::-webkit-scrollbar{width:4px}.param-body::-webkit-scrollbar-thumb{background:var(--line)}.webcam-panel{position:absolute;right:14px;bottom:14px;width:min(34vw,360px);border:1px solid var(--line);background:#08080a}.webcam-panel canvas{display:block;width:100%;height:auto}.webcam-panel.presentation-hidden{display:none}.webcam-label{position:absolute;top:6px;left:8px;font-size:10px;color:#ffffff73}.toast{position:absolute;bottom:22px;left:50%;transform:translate(-50%);padding:8px 14px;background:var(--panel);border:1px solid var(--line);font-size:12px;max-width:min(480px,calc(100vw - 32px));text-align:center;color:var(--ink-dim)}.mobile-controls{display:none}.fatal{position:fixed;top:0;right:0;bottom:0;left:0;display:grid;place-items:center;padding:24px;text-align:center;color:var(--ink-dim);line-height:1.6}@media (max-width: 640px){.hud{top:10px;left:10px}.panel{top:10px;right:10px}.webcam-panel{width:44vw;right:10px;bottom:10px}.start-buttons{flex-direction:column;width:100%}.start-buttons button{width:100%}}.mobile-device .start-card{width:min(420px,calc(100vw - 32px));padding:14px}.mobile-device .mobile-start-hint{display:block}.mobile-device button{min-height:44px}.mobile-device .hud{top:max(8px,env(safe-area-inset-top));left:max(8px,env(safe-area-inset-left));min-width:136px;padding:7px 9px}.mobile-device .hud-keys{display:none}.mobile-device .panel{top:max(8px,env(safe-area-inset-top));right:max(8px,env(safe-area-inset-right));max-height:calc(100dvh - 16px);overflow-y:auto}.mobile-device .webcam-panel{right:max(8px,env(safe-area-inset-right));bottom:max(8px,env(safe-area-inset-bottom));width:min(42vw,180px)}.mobile-device .toast{bottom:calc(max(8px,env(safe-area-inset-bottom)) + 48px);max-width:min(52vw,360px)}.mobile-device .mobile-controls{position:absolute;left:max(8px,env(safe-area-inset-left));bottom:max(8px,env(safe-area-inset-bottom));display:flex;gap:6px}.mobile-device .mobile-controls button{min-height:40px;padding:7px 11px;border-color:#ffffff2e;background:#0c0c0ed1;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);font-size:12px}@media (prefers-reduced-motion: reduce){*{transition:none!important}}