:root{--bg: #0f1115;--panel: #151821;--panel-2: #0f141b;--border: #2a3040;--text: #e5e7eb;--muted: #9aa4b2;--accent: #3b82f6;--accent-2: #22c55e;--danger: #ef4444}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Noto Sans,Ubuntu,Cantarell,Helvetica Neue,Arial,Apple Color Emoji,Segoe UI Emoji;background:radial-gradient(80% 80% at 50% 0%,#151821,#0f1115 60%);color:var(--text);overflow:hidden}.appbar{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;border-bottom:1px solid var(--border);background:#0f1115b3;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px)}.logo{display:flex;align-items:center;gap:8px}.badge{width:32px;height:32px;background:var(--accent);border-radius:8px;display:flex;align-items:center;justify-content:center;font-weight:800}.badge.github{background:#0d1117;color:#e5e7eb;border:1px solid var(--border);transition:transform .18s ease,box-shadow .18s ease,background .18s ease}.badge.github:hover{transform:translateY(-1px) scale(1.05) rotate(-2deg);box-shadow:0 6px 20px #00000059;background:#111826}.title{font-weight:700;font-size:16px}.layout{display:flex;height:calc(100vh - 57px)}.panel{background:#151821b3;border-right:1px solid var(--border);width:300px;overflow:auto;transition:width .2s ease}.panel.collapsed{width:0;padding:0;border:none}.panel.right{border-left:1px solid var(--border);border-right:none}.panel.right.collapsed{width:0;padding:0;border:none}.center{flex:1;display:flex;flex-direction:column;min-width:0;min-height:0}.center .resizer{height:8px;cursor:row-resize;background:transparent}.section{padding:8px}.panel.section .card{margin-bottom:8px}.panel.right.section .card{margin-bottom:0}.card{border:1px solid var(--border);border-radius:12px;background:var(--panel);padding:12px}.row{display:flex;align-items:center;gap:8px}.space{flex:1}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:8px 10px;border:1px solid var(--border);border-radius:8px;color:var(--text);background:linear-gradient(180deg,#1a1f2b,#141824);cursor:pointer}.btn:hover{border-color:#3b4255}.btn.ghost{background:transparent}.btn.icon{width:34px;height:34px;padding:0}.btn.primary{border-color:transparent;background:var(--accent);color:#000;font-weight:700}.grid{display:grid;gap:8px}.grid.two{grid-template-columns:1fr 1fr}.file-list-item{display:flex;align-items:center;gap:10px;padding:8px;border:1px solid var(--border);border-radius:8px}.file-icon{width:18px;height:18px;opacity:.9}.badge-sm{font-size:11px;color:var(--muted)}.uploader{border:2px dashed var(--border);border-radius:12px;padding:16px;text-align:center;color:var(--muted)}.uploader.drag{border-color:var(--accent);background:#3b82f614}.video-wrap{border:1px solid var(--border);border-radius:12px;overflow:hidden;background:var(--panel)}.controls-bar{display:flex;align-items:center;gap:8px;padding:10px;border-top:1px solid var(--border);background:var(--panel-2)}.timeline-wrap{padding:0 12px 12px;min-height:0;overflow-y:auto}.timeline{position:relative;border:1px solid var(--border);border-radius:6px;background:#0e1016;overflow-x:auto;overflow-y:hidden;white-space:nowrap}.ruler{position:relative;height:24px;border-bottom:1px solid var(--border)}.ruler .tick{position:absolute;top:0;bottom:0;width:1px;background:#2c3242}.ruler .label{position:absolute;top:2px;font-size:11px;color:var(--muted);transform:translate(-50%)}.ruler .label[style*=right]{transform:translate(0)}.wave{position:relative;height:56px;border-bottom:1px solid var(--border);background:#0e1016}.wave canvas{display:block;width:100%;height:100%}.playhead{position:absolute;top:0;bottom:0;width:2px;background:var(--danger);pointer-events:none;z-index:3}.tracks{position:relative;display:flex;flex-direction:column;min-height:0}.der-overlay{position:absolute;left:0;right:0;top:0;bottom:0;pointer-events:none}.der-overlay .der-chunk{position:absolute;top:0;bottom:0;border-radius:4px;transform-origin:center;transition:transform .12s ease,opacity .12s ease}.der-overlay .der-chunk:hover{transform:translateY(-1px);opacity:.3}.track{position:relative;height:28px;background:#121624;border-top:1px solid #20263a}.seg{position:absolute;top:3px;bottom:3px;border-radius:4px;opacity:.9;transition:box-shadow .1s ease}.seg.ghost{background:#3b82f659;outline:1px dashed rgba(59,130,246,.9);pointer-events:none}.seg.active{outline:2px solid rgba(255,255,255,.9);box-shadow:0 0 0 2px #ef444480 inset}.seg.selected{box-shadow:0 0 0 2px #ffffff80 inset}.seg .handle{position:absolute;top:-2px;bottom:-2px;width:6px;background:#fff3;opacity:0;transition:opacity .12s ease;cursor:ew-resize}.seg .handle.left{left:-3px;border-top-left-radius:4px;border-bottom-left-radius:4px}.seg .handle.right{right:-3px;border-top-right-radius:4px;border-bottom-right-radius:4px}.seg:hover .handle{opacity:1}.context-menu{position:fixed;z-index:1000;background:#0f141b;border:1px solid var(--border);border-radius:8px;box-shadow:0 8px 30px #0006;padding:4px}.context-menu .menu-item{display:block;width:100%;text-align:left;padding:8px 12px;background:transparent;border:none;color:var(--text);cursor:pointer}.context-menu .menu-item:hover{background:#111827}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:1000}.modal{width:360px;background:#0f141b;border:1px solid var(--border);border-radius:12px;padding:16px}.toast{position:fixed;left:50%;transform:translate(-50%);bottom:20px;background:#0f141b;border:1px solid var(--border);padding:8px 12px;border-radius:8px;display:flex;align-items:center;gap:8px;z-index:1000}.toast .link{background:transparent;border:none;color:var(--accent);cursor:pointer}.legend-item{display:flex;align-items:center;gap:8px;padding:8px;border:1px solid var(--border);border-radius:8px;min-width:0}.color-dot{width:14px;height:14px;border-radius:4px}.hidden{opacity:.5}.legend-item.current{border-color:var(--accent);box-shadow:0 0 0 1px var(--accent) inset}input[type=range]{width:200px}.appbar.overlay-controls{position:sticky;top:0}