:root{--bg: #0f1115;--panel: #171a21;--panel-2: #1f242e;--border: #2a303c;--text: #d7dce4;--text-dim: #8b93a1;--accent: #3b82f6;--accent-dim: #2b5aa8}*{box-sizing:border-box}[hidden]{display:none!important}html,body{margin:0;height:100%;background:var(--bg);color:var(--text);font:13px/1.45 system-ui,Segoe UI,sans-serif}#app{display:flex;height:100vh}#sidebar{width:280px;flex:none;background:var(--panel);border-right:1px solid var(--border);overflow-y:auto;padding:14px}#sidebar h1{font-size:15px;margin:0 0 10px}#sidebar h2{font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--text-dim);margin:0 0 8px}#sidebar section{border-top:1px solid var(--border);padding:12px 0}#sidebar section:first-of-type{border-top:none}.hint{color:var(--text-dim);font-size:11.5px;margin:8px 0 0}button{background:var(--panel-2);color:var(--text);border:1px solid var(--border);border-radius:6px;padding:6px 10px;cursor:pointer;font:inherit}button:hover:not(:disabled){border-color:var(--accent-dim)}button:disabled{opacity:.45;cursor:default}button.primary{background:var(--accent-dim);border-color:var(--accent-dim)}button.primary:hover:not(:disabled){background:var(--accent)}button.wide{width:100%;margin-top:6px}select,input[type=number]{background:var(--panel-2);color:var(--text);border:1px solid var(--border);border-radius:5px;padding:4px 6px;font:inherit}input[type=number]{width:64px}.row{display:flex;align-items:center;justify-content:space-between;gap:8px;margin:6px 0}.clip-item{background:var(--panel-2);border:1px solid var(--border);border-radius:8px;padding:8px;margin-bottom:8px}.clip-item.dragging{opacity:.4}.clip-item.drag-over{border-color:var(--accent)}.clip-head{display:flex;gap:8px;align-items:center;cursor:grab}.clip-thumb{width:56px;height:32px;flex:none;border-radius:4px;background:#000;object-fit:cover}.clip-title{flex:1;min-width:0}.clip-name{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-weight:600;font-size:12px}.clip-meta{color:var(--text-dim);font-size:11px}.clip-error{color:#f87171;font-size:11px;margin-top:4px}.clip-btns{display:flex;flex-direction:column;gap:2px}.clip-btns button{padding:0 6px;font-size:11px;line-height:18px}.clip-controls{display:flex;align-items:center;gap:6px;margin-top:7px;font-size:11.5px;color:var(--text-dim)}.clip-controls input[type=range]{flex:1;min-width:40px}.clip-controls input[type=number]{width:56px;padding:2px 4px}.clip-badge{display:inline-block;background:var(--accent-dim);color:#fff;border-radius:3px;font-size:10px;padding:0 5px;margin-right:4px}#layout-picker{display:grid;grid-template-columns:1fr 1fr;gap:6px}#layout-picker button.active{background:var(--accent-dim);border-color:var(--accent)}#export-progress{height:6px;background:var(--panel-2);border-radius:3px;margin-top:8px;overflow:hidden}#export-bar{height:100%;width:0;background:var(--accent);transition:width .1s linear}#main{flex:1;display:flex;flex-direction:column;min-width:0}#canvas-wrap{flex:1;display:flex;align-items:center;justify-content:center;min-height:0;position:relative;padding:16px}#preview{max-width:100%;max-height:100%;background:#000;border-radius:4px}#preview.wipe-cursor{cursor:ew-resize}#drop-hint{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;color:var(--text-dim);pointer-events:none}#drop-hint strong{color:var(--text);font-size:16px}body.drag-active #drop-hint,body.drag-active #canvas-wrap{outline:2px dashed var(--accent);outline-offset:-10px;border-radius:12px}#transport{flex:none;background:var(--panel);border-top:1px solid var(--border);padding:10px 14px}.transport-row{display:flex;align-items:center;gap:8px;margin:4px 0}#t-play{min-width:64px}#scrub-wrap{flex:1;position:relative;height:22px;display:flex;align-items:center}#scrubber{width:100%;margin:0;position:relative;z-index:2;accent-color:var(--accent)}#mark-range{position:absolute;top:8px;height:6px;background:var(--accent-dim);opacity:.55;border-radius:3px;z-index:1;pointer-events:none}.frame-box{display:flex;align-items:center;gap:5px;color:var(--text-dim);white-space:nowrap}#frame-input{width:70px}#time-readout{color:var(--text-dim);font-variant-numeric:tabular-nums;white-space:nowrap}