:root{font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}*{box-sizing:border-box}body{margin:0;width:100%;height:100%;background-color:#000;color:#fff}button{border:none;font-family:inherit}:root,body,html,#root{width:100%;height:100%;margin:0;padding:0;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;background:#000;color:#fff}body{overflow:hidden}#root{position:relative}canvas{display:block}#renderCanvas{width:100%;height:100%;touch-action:none}#loading{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);color:#fff;font-size:24px;text-align:center;z-index:200}.spinner{border:4px solid rgba(255,255,255,.3);border-top:4px solid #4fc3f7;border-radius:50%;width:50px;height:50px;animation:spin 1s linear infinite;margin:20px auto}.ui-overlay{position:absolute;top:20px;left:20px;color:#fff;background:#0009;padding:15px 20px;border-radius:10px;font-size:14px;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);z-index:110;max-width:320px;box-shadow:0 8px 24px #00000059}.overlay-title{margin:0 0 10px;font-size:18px;color:#4fc3f7}.ui-overlay p{margin:5px 0;line-height:1.6}.key{display:inline-block;background:#fff3;padding:2px 8px;border-radius:4px;margin:0 2px;font-weight:600;letter-spacing:.4px}.overlay-subtext{margin-top:10px;font-size:12px;opacity:.8}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.narrative-controls{position:absolute;top:20px;left:50%;transform:translate(-50%);display:flex;gap:10px;z-index:105}.narrative-btn{padding:12px 24px;background:#141e30e6;border:2px solid #4fc3f7;border-radius:8px;color:#fff;font-size:16px;font-weight:600;cursor:pointer;transition:all .3s ease;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.narrative-btn:hover{background:#4fc3f733;border-color:#81d4fa;transform:translateY(-2px);box-shadow:0 4px 12px #4fc3f74d}.narrative-btn.active{background:#4fc3f74d;border-color:#81d4fa;box-shadow:0 0 20px #4fc3f780}.narrative-panel{position:absolute;bottom:20px;left:50%;right:auto;width:clamp(420px,65vw,900px);max-height:52vh;background:#0f172af2;border:2px solid #4fc3f7;border-radius:12px;padding:14px;transform:translate(-50%,calc(100% + 28px));transition:transform .35s ease;z-index:100;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);overflow-y:auto;box-shadow:0 12px 32px #00000073}.narrative-panel.active{transform:translate(-50%)}.narrative-header{display:flex;position:relative;justify-content:center;align-items:center;gap:12px;margin-bottom:10px;padding-right:52px}.narrative-header h2{flex:1;text-align:center;margin:0;font-size:24px;color:#4fc3f7}.language-toggle{position:absolute;right:0;top:50%;transform:translateY(-50%);padding:8px 16px;background:#4fc3f733;border:1px solid #4fc3f7;border-radius:6px;color:#fff;font-size:14px;cursor:pointer;transition:all .3s ease;opacity:0;pointer-events:none}.language-toggle.visible{opacity:1;pointer-events:all}.language-toggle:hover{background:#4fc3f74d}.annotation-text{background:#00000080;padding:12px;border-radius:7px;border-left:4px solid #4fc3f7;margin-bottom:14px;font-size:15px;line-height:1.5;min-height:52px}.timeline-container{margin-bottom:14px}.timeline-markers{display:flex;justify-content:space-between;margin-bottom:8px;font-size:12px;color:#94a3b8}.timeline-marker{text-align:center;flex:1}.timeline-track{position:relative;height:32px;background:#00000080;border-radius:20px;cursor:pointer;overflow:visible}.timeline-progress{position:absolute;left:0;top:0;height:100%;background:linear-gradient(90deg,#4fc3f7,#81d4fa);border-radius:20px;width:0%;transition:width .1s linear;box-shadow:0 0 20px #4fc3f780}.timeline-scrubber{position:absolute;top:50%;left:0%;transform:translate(-50%,-50%);width:20px;height:20px;background:#fff;border:3px solid #4fc3f7;border-radius:50%;cursor:grab;box-shadow:0 0 10px #4fc3f7cc;transition:left .1s linear}.timeline-scrubber:active{cursor:grabbing;transform:translate(-50%,-50%) scale(1.2)}.timeline-controls{display:flex;justify-content:center;gap:10px;margin:10px 0 12px}.timeline-controls button{padding:8px 16px;background:#4fc3f733;border:1px solid #4fc3f7;border-radius:6px;color:#fff;font-size:13px;cursor:pointer;transition:all .3s ease}.timeline-controls button:hover{background:#4fc3f74d;transform:scale(1.05)}.speed-controls{display:flex;justify-content:center;align-items:center;gap:8px;margin-bottom:12px}.speed-controls span{color:#94a3b8;font-size:14px}.speed-controls button{padding:6px 12px;background:#00000080;border:1px solid #475569;border-radius:4px;color:#94a3b8;font-size:13px;cursor:pointer;transition:all .3s ease}.speed-controls button:hover{border-color:#4fc3f7;color:#fff}.speed-controls button.active{background:#4fc3f74d;border-color:#4fc3f7;color:#fff}.scene-jumps{display:flex;justify-content:center;gap:8px;flex-wrap:wrap}.scene-jumps button{padding:8px 14px;background:#00000080;border:1px solid #475569;border-radius:6px;color:#fff;font-size:13px;cursor:pointer;transition:all .3s ease}.scene-jumps button:hover{background:#4fc3f733;border-color:#4fc3f7;transform:translateY(-2px)}body.in-xr .narrative-controls,body.in-xr .narrative-panel,body.in-xr .ui-overlay{display:none}