:root{--bg: #1a1d23;--panel: #23272f;--panel-2: #2c313a;--border: #3a414d;--text: #e6e9ef;--muted: #99a1b3;--accent: #4f9cff;--accent-2: #ffb347;--mark: rgba(79, 156, 255, .28);--sidebar-w: 280px;--controlbar-h: 96px}*{box-sizing:border-box}[hidden]{display:none!important}html,body{margin:0;height:100%;background:var(--bg);color:var(--text);font:13px/1.4 system-ui,-apple-system,Segoe UI,Roboto,sans-serif;overflow:hidden}#app{display:grid;grid-template-columns:var(--sidebar-w) 1fr;grid-template-rows:1fr var(--controlbar-h);grid-template-areas:"sidebar viewport" "sidebar controlbar";height:100vh;width:100vw}#sidebar{grid-area:sidebar;background:var(--panel);border-right:1px solid var(--border);padding:16px;overflow-y:auto}.brand{font-size:15px;font-weight:600;margin:0 0 16px;letter-spacing:.2px}.panel{margin-bottom:18px;padding-bottom:14px;border-bottom:1px solid var(--border)}.panel h2{font-size:11px;text-transform:uppercase;letter-spacing:.6px;color:var(--muted);margin:0 0 10px}.row{display:flex;align-items:center;gap:8px;margin-bottom:8px}.row.column{flex-direction:column;align-items:stretch}.row.column>span{margin-bottom:6px}.file-status{color:var(--muted);font-style:italic;word-break:break-all}.file-status.loaded{color:var(--text);font-style:normal;font-weight:600}.metadata{margin:8px 0 0;display:grid;grid-template-columns:auto 1fr;gap:2px 10px;font-size:12px}.metadata dt{color:var(--muted)}.metadata dd{margin:0;text-align:right}.hint{color:var(--muted);font-size:11px;margin:6px 0 0}.actor-list{display:flex;flex-direction:column;gap:4px}.actor-row{display:flex;align-items:center;gap:8px;cursor:pointer}.actor-name{flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.actor-name.prop{color:var(--muted);font-style:italic}.actor-color{width:22px;height:18px;padding:0;border:1px solid var(--border);border-radius:4px;background:none;cursor:pointer}.cam-euler{font-variant-numeric:tabular-nums;color:var(--text);background:var(--panel-2);border:1px solid var(--border);border-radius:5px;padding:4px 6px}select{width:100%}.seg-row{display:flex;gap:6px}.scene-prompt-actions{justify-content:center;margin-top:14px}#scene-prompt-msg{max-width:340px;line-height:1.5}.btn.small{padding:5px 10px;font-size:12px}input[type=range]{width:100%;accent-color:var(--accent)}select,input[type=number]{background:var(--panel-2);color:var(--text);border:1px solid var(--border);border-radius:5px;padding:4px 6px}input[type=number]{width:72px}.segmented{gap:0;border:1px solid var(--border);border-radius:6px;overflow:hidden;width:fit-content}.seg{background:var(--panel-2);color:var(--muted);border:none;padding:6px 14px;cursor:pointer;border-right:1px solid var(--border)}.seg:last-child{border-right:none}.seg.active{background:var(--accent);color:#fff}#viewport{grid-area:viewport;position:relative;overflow:hidden}#webgl{display:block;width:100%;height:100%}.video-layer{position:absolute;background:#000;pointer-events:none;overflow:hidden}.video-layer video{width:100%;height:100%;object-fit:contain;display:block}.video-layer.pip{right:16px;bottom:16px;width:32%;max-width:460px;aspect-ratio:16 / 9;border:1px solid var(--border);border-radius:6px;box-shadow:0 6px 22px #00000080}.video-layer.split-lr{top:0;right:0;width:50%;height:100%}.video-layer.split-tb{left:0;bottom:0;width:100%;height:50%}.video-layer.overlay{inset:0}.dropzone{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;pointer-events:none;transition:background .15s ease}.dropzone.drag{pointer-events:auto;background:#4f9cff1f;outline:3px dashed var(--accent);outline-offset:-16px}.dropzone-inner{display:flex;flex-direction:column;align-items:center;gap:6px;padding:28px 40px;border:2px dashed var(--border);border-radius:12px;background:#1a1d23b3;color:var(--muted);text-align:center}.dropzone-inner strong{color:var(--text);font-size:15px}.dropzone.has-content .dropzone-inner{opacity:0;transition:opacity .2s ease}.dropzone.has-content.drag .dropzone-inner{opacity:1}.toast{position:absolute;top:16px;left:50%;transform:translate(-50%);background:var(--panel);border:1px solid var(--border);border-radius:6px;padding:8px 14px;max-width:70%;box-shadow:0 4px 18px #0006;z-index:10}.toast.error{border-color:#ff6b6b;color:#ffb3b3}.export-overlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:#0a0c10b3;z-index:20}.export-box{background:var(--panel);border:1px solid var(--border);border-radius:10px;padding:22px 28px;min-width:280px;text-align:center}.export-box progress{width:100%;margin-top:12px;accent-color:var(--accent)}#controlbar{grid-area:controlbar;background:var(--panel);border-top:1px solid var(--border);display:flex;align-items:center;gap:14px;padding:0 16px;flex-wrap:wrap}.btn{background:var(--panel-2);color:var(--text);border:1px solid var(--border);border-radius:6px;padding:7px 14px;cursor:pointer;white-space:nowrap}.btn:hover:not(:disabled){border-color:var(--accent)}.btn:disabled{opacity:.4;cursor:not-allowed}.btn.primary{background:var(--accent);border-color:var(--accent);color:#fff}.timeline-wrap{flex:1 1 280px;min-width:200px}.timeline-track{position:relative;display:flex;align-items:center}.timeline-track input[type=range]{position:relative;z-index:2}.mark-range{position:absolute;top:50%;transform:translateY(-50%);height:8px;background:var(--mark);border-left:2px solid var(--accent);border-right:2px solid var(--accent);border-radius:2px;z-index:1;pointer-events:none}.transport{display:flex;align-items:center;gap:4px}.btn.icon{padding:7px 9px;line-height:1;font-size:11px}.frame-readout{display:flex;align-items:center;gap:6px;color:var(--muted)}.time-readout{font-variant-numeric:tabular-nums;color:var(--text);white-space:nowrap}.clip-duration{color:var(--accent);font-variant-numeric:tabular-nums;white-space:nowrap;margin-left:4px}.marks{display:flex;align-items:center;gap:6px}.exports{display:flex;gap:8px;margin-left:auto}