:root{--bg: #0e1018;--panel: #171a26;--panel2: #1e2233;--border: #2b3049;--text: #e8eaf6;--muted: #8b93b8;--accent: #5b7cff;--accent2: #46d39a;--danger: #ff6b6b;--track-h: 64px;--ruler-h: 22px}*{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,PingFang SC,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);min-height:100vh}.app{max-width:1080px;margin:0 auto;padding:14px 18px 24px;display:flex;flex-direction:column;gap:12px;min-height:100vh}.topbar{display:flex;align-items:center;justify-content:space-between}.logo{font-size:20px;font-weight:800;letter-spacing:.5px;background:linear-gradient(90deg,#8ea0ff,#46d39a);-webkit-background-clip:text;background-clip:text;color:transparent}.loading-bar{position:relative;height:22px;background:var(--panel);border:1px solid var(--border);border-radius:6px;overflow:hidden}.loading-fill{position:absolute;inset:0;width:0%;background:linear-gradient(90deg,var(--accent),var(--accent2));transition:width .25s ease}.loading-bar.indeterminate .loading-fill{width:40%!important;background:repeating-linear-gradient(45deg,var(--accent) 0 12px,var(--accent2) 12px 24px);background-size:34px 100%;animation:loading-slide 1s linear infinite}@keyframes loading-slide{0%{transform:translate(-100%)}to{transform:translate(250%)}}.loading-text{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font-size:11px;color:#fff;text-shadow:0 1px 2px rgba(0,0,0,.6);pointer-events:none}.top-actions{display:flex;gap:8px}.btn{border:none;border-radius:8px;padding:8px 16px;font-size:13px;font-weight:600;cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;gap:6px;transition:filter .15s,opacity .15s;background:var(--panel2);color:var(--text)}.btn:disabled{opacity:.4;cursor:not-allowed}.btn:not(:disabled):hover{filter:brightness(1.15)}.btn.primary{background:var(--accent);color:#fff}.btn.success{background:var(--accent2);color:#0b2b1f}.btn.ghost{background:var(--panel2);border:1px solid var(--border)}.btn.big{padding:12px 28px;font-size:15px}.icon-btn{width:30px;height:30px;border-radius:6px;border:1px solid var(--border);background:var(--panel2);color:var(--text);cursor:pointer;font-size:15px;display:inline-flex;align-items:center;justify-content:center}.icon-btn:hover{background:var(--border)}.empty-state{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;border:2px dashed var(--border);border-radius:16px;padding:60px 20px;text-align:center}.empty-state.dragover{border-color:var(--accent);background:#5b7cff0f}.empty-icon{font-size:52px}.empty-title{font-size:17px}.empty-hint{font-size:13px;color:var(--muted);margin-bottom:8px}.editor{display:flex;flex-direction:column;gap:10px}.preview-area{background:#000;border-radius:12px;overflow:hidden;border:1px solid var(--border)}.preview-area video{width:100%;max-height:46vh;display:block;background:#000;object-fit:contain}.preview-bar{display:flex;align-items:center;gap:12px;padding:8px 12px;background:var(--panel)}.time-label{font-size:13px;font-variant-numeric:tabular-nums;color:var(--muted)}.preview-bar .hint{font-size:11px;color:var(--muted);opacity:.7}.loop-label{display:flex;align-items:center;gap:5px;font-size:12px;color:var(--muted);cursor:pointer;user-select:none;white-space:nowrap}.loop-label input{accent-color:var(--accent);cursor:pointer;margin:0}.spacer{flex:1}.toolbar{display:flex;align-items:center;gap:6px;background:var(--panel);border:1px solid var(--border);border-radius:10px;padding:8px 12px;flex-wrap:wrap}.toolbar-sep{width:1px;height:22px;background:var(--border);margin:0 2px}.toolbar input[type=range]{width:140px}.zoom-group{display:flex;align-items:center;gap:6px;flex-wrap:nowrap;white-space:nowrap}.zoom-group input[type=range]{width:120px}input[type=range]{-webkit-appearance:none;appearance:none;height:5px;background:var(--panel2);border-radius:3px;outline:none;cursor:pointer}input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:13px;height:13px;border-radius:50%;background:var(--accent);border:2px solid #fff3}input[type=range]::-moz-range-thumb{width:12px;height:12px;border-radius:50%;background:var(--accent);border:2px solid #fff3}.timeline{background:var(--panel);border:1px solid var(--border);border-radius:10px;overflow:hidden}.tracks-viewport{overflow-x:auto;overflow-y:hidden}.tracks-inner{position:relative;padding:var(--ruler-h) 0 0 56px;min-width:100%;min-height:calc(var(--ruler-h) + var(--track-h) * 2 + 12px);user-select:none}.ruler{position:absolute;top:0;left:56px;right:0;height:var(--ruler-h);background:var(--panel2);border-bottom:1px solid var(--border);cursor:pointer}.ruler-tick{position:absolute;bottom:0;width:1px;height:6px;background:var(--muted);opacity:.5}.ruler-tick.major{height:10px;opacity:.9}.ruler-label{position:absolute;top:3px;transform:translate(3px);font-size:10px;color:var(--muted);font-variant-numeric:tabular-nums;pointer-events:none}.track{position:relative;height:var(--track-h);display:flex}.track+.track{border-top:1px solid var(--border)}.track.active .track-lane{background:repeating-linear-gradient(90deg,transparent 0 39px,rgba(91,124,255,.05) 39px 40px);box-shadow:inset 0 0 0 1px #5b7cff4d}.track.active .track-label{color:var(--accent);font-weight:700}.track-label{position:absolute;left:-56px;top:0;bottom:0;width:56px;display:flex;align-items:center;justify-content:center;font-size:11px;color:var(--muted);background:var(--panel2);border-right:1px solid var(--border);cursor:pointer;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;padding:0 2px;text-align:center}.track-lane{position:relative;flex:1;background:repeating-linear-gradient(90deg,transparent 0 39px,rgba(255,255,255,.02) 39px 40px)}.clip{position:absolute;top:4px;bottom:4px;border-radius:6px;overflow:hidden;border:2px solid transparent;cursor:pointer;transition:border-color .12s;touch-action:none}.clip-head,.clip-head img,.clip-wave,.clip-name,.clip-dur,.clip-speed{pointer-events:none}.clip.selected{border-color:#fff;box-shadow:0 0 0 1px var(--accent)}.clip.video{background:linear-gradient(180deg,#2c3d66,#22304f)}.clip.audio{background:linear-gradient(180deg,#1f4d3c,#173a2d)}.clip-head{position:absolute;top:0;left:0;right:0;display:flex;gap:3px;padding:3px 4px;overflow:hidden}.clip-head img{height:22px;border-radius:2px;object-fit:cover;flex-shrink:0}.clip-name{position:absolute;left:6px;bottom:4px;right:6px;font-size:10px;color:#cfd6f5;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;text-shadow:0 1px 2px #000a}.clip-wave{position:absolute;inset:8px 0;width:100%;height:calc(100% - 16px)}.clip-dur{position:absolute;right:6px;top:4px;font-size:10px;color:#cfd6f5;font-variant-numeric:tabular-nums;text-shadow:0 1px 2px #000a}.clip-handle{position:absolute;top:0;bottom:0;width:8px;cursor:ew-resize;z-index:3;opacity:0;transition:opacity .12s;background:var(--accent)}.clip:hover .clip-handle,.clip.selected .clip-handle{opacity:.75}.clip-handle.left{left:0;border-radius:5px 0 0 5px}.clip-handle.right{right:0;border-radius:0 5px 5px 0}.clip-speed{position:absolute;left:6px;top:4px;font-size:9px;font-weight:700;color:#ffd166;background:#00000073;border-radius:3px;padding:1px 4px;text-shadow:none}.clip.dragging{opacity:.6;z-index:5}.ctx-menu{position:fixed;z-index:200;background:var(--panel2);border:1px solid var(--border);border-radius:8px;padding:4px;min-width:160px;box-shadow:0 8px 24px #00000080}.ctx-menu button{display:flex;justify-content:space-between;align-items:center;width:100%;padding:7px 12px;background:none;border:none;color:var(--text);font-size:13px;cursor:pointer;border-radius:5px;text-align:left}.ctx-menu button:hover:not(:disabled){background:var(--accent);color:#fff}.ctx-menu button:disabled{color:var(--muted);cursor:not-allowed;opacity:.5}.ctx-menu button .kbd{font-size:11px;color:var(--muted);margin-left:16px}.ctx-menu button:hover:not(:disabled) .kbd{color:#fffc}.ctx-menu .sep{height:1px;background:var(--border);margin:4px 6px}.ctx-menu .speed-row{display:flex;gap:4px;padding:6px 10px}.ctx-menu .speed-row button{flex:1;padding:4px 0;justify-content:center;background:var(--panel);font-size:12px}.playhead{position:absolute;top:0;bottom:0;width:2px;background:#ff5252;left:56px;pointer-events:none;z-index:10}.playhead:before{content:"";position:absolute;top:0;left:-6px;border:7px solid transparent;border-top:10px solid #ff5252}.modal-mask{position:fixed;inset:0;z-index:100;background:#0009;display:flex;align-items:center;justify-content:center}.modal{width:min(480px,92vw);background:var(--panel);border:1px solid var(--border);border-radius:14px;padding:20px;display:flex;flex-direction:column;gap:14px}.modal h3{font-size:17px}.export-options{display:flex;flex-direction:column;gap:10px}.radio{display:flex;gap:10px;align-items:flex-start;cursor:pointer}.radio input{margin-top:3px;accent-color:var(--accent)}.radio span{font-size:14px}.radio small{display:block;color:var(--muted);font-size:12px;margin-top:2px}.field{display:flex;flex-direction:column;gap:6px;font-size:13px;color:var(--muted)}.field select{background:var(--panel2);color:var(--text);border:1px solid var(--border);border-radius:8px;padding:8px 10px;font-size:14px}.export-progress{display:flex;flex-direction:column;gap:8px}.progress-bar{height:8px;border-radius:4px;background:var(--panel2);overflow:hidden}.progress-fill{height:100%;width:0%;border-radius:4px;background:linear-gradient(90deg,var(--accent),var(--accent2));transition:width .2s}.progress-text{font-size:12px;color:var(--muted)}.export-result{display:flex;flex-direction:column;gap:10px}.export-result video{width:100%;border-radius:8px;background:#000;max-height:240px}.export-result audio{width:100%}.error{padding:10px 12px;border-radius:8px;background:#ff6b6b1f;border:1px solid rgba(255,107,107,.4);color:var(--danger);font-size:12px;white-space:pre-wrap}.modal-actions{display:flex;justify-content:flex-end;gap:8px}.foot{text-align:center;font-size:11px;color:var(--muted);margin-top:auto}.hidden{display:none!important}