:root{--bg: #000000;--panel: #121214;--panel-2: #1c1c1f;--elev: #2a2a2e;--line: rgba(255, 255, 255, .09);--text: #ffffff;--muted: rgba(255, 255, 255, .55);--muted-2: rgba(255, 255, 255, .38);--accent: #2b8cff;--accent-press: #1f6fd6;--danger: #ff4d5e;--clip-border-sel: #ffffff;--playhead: #ffffff;color-scheme:dark}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}html,body,#root{height:100%;margin:0}body{background:var(--bg);color:var(--text);font:14px/1.4 -apple-system,BlinkMacSystemFont,SF Pro Text,Segoe UI,Roboto,system-ui,sans-serif;overscroll-behavior:none;-webkit-user-select:none;user-select:none;touch-action:manipulation}button{font:inherit;color:var(--text);background:none;border:none;padding:0;margin:0;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:6px}button:disabled{opacity:.32;cursor:default}button:active:not(:disabled){opacity:.7}.app{display:flex;flex-direction:column;height:100%;background:var(--bg);padding-top:env(safe-area-inset-top);padding-bottom:env(safe-area-inset-bottom)}.topbar{display:flex;align-items:center;gap:12px;height:52px;padding:0 12px;flex:0 0 auto}.topbar .icon-btn{width:36px;height:36px;color:var(--text)}.topbar .spacer{flex:1}.res-chip{font-size:13px;font-weight:600;color:var(--text);background:var(--panel-2);border-radius:8px;padding:6px 10px}.export-btn{background:var(--accent);color:#fff;font-weight:600;border-radius:9px;padding:8px 16px;font-size:14px}.export-btn:active:not(:disabled){background:var(--accent-press);opacity:1}.preview{position:relative;flex:1 1 auto;min-height:0;display:flex;align-items:center;justify-content:center;background:var(--bg);overflow:hidden;padding:6px 12px}.preview canvas{max-width:100%;max-height:100%;object-fit:contain;border-radius:6px;background:#000;box-shadow:0 0 0 1px var(--line)}.preview .empty{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;color:var(--muted);text-align:center;padding:24px}.preview .empty .glyph{width:54px;height:54px;border-radius:16px;background:var(--panel-2);display:flex;align-items:center;justify-content:center;color:var(--muted);margin-bottom:4px}.transport{display:flex;align-items:center;gap:10px;height:44px;padding:0 16px;flex:0 0 auto}.transport .time{font-variant-numeric:tabular-nums;font-size:12px;color:var(--muted);min-width:96px}.transport .time b{color:var(--text);font-weight:600}.transport .center{flex:1;display:flex;justify-content:center;gap:18px}.transport .right{min-width:96px;display:flex;justify-content:flex-end}.play-btn{width:40px;height:40px;color:var(--text)}.icon-btn{color:var(--muted);width:36px;height:36px}.timeline-wrap{position:relative;flex:0 0 auto;height:178px;background:var(--bg);border-top:1px solid var(--line)}.timeline-scroll{position:absolute;top:0;right:0;bottom:0;left:0;overflow-x:auto;overflow-y:hidden;-webkit-overflow-scrolling:touch;scrollbar-width:none;touch-action:pan-x}.timeline-scroll::-webkit-scrollbar{display:none}.timeline-inner{position:relative;height:100%}.ruler{position:relative;height:24px;margin-top:6px}.ruler .tick{position:absolute;top:6px;font-size:10px;color:var(--muted-2);font-variant-numeric:tabular-nums;transform:translate(-50%)}.ruler .tick:before{content:"";position:absolute;top:-6px;left:50%;width:1px;height:4px;background:var(--muted-2)}.track{position:relative;height:84px;margin-top:8px}.clip{position:absolute;top:0;height:84px;border-radius:8px;overflow:hidden;background-color:var(--panel-2);background-size:auto 100%;background-repeat:repeat-x;box-shadow:inset 0 0 0 1px var(--line);touch-action:pan-x}.clip .scrim{position:absolute;top:0;right:0;bottom:0;left:0;background:linear-gradient(180deg,transparent 55%,rgba(0,0,0,.6))}.clip.selected{box-shadow:inset 0 0 0 2px var(--clip-border-sel);z-index:4}.clip .label{position:absolute;left:8px;bottom:6px;font-size:11px;font-weight:500;color:#fff;text-shadow:0 1px 3px rgba(0,0,0,.8);max-width:calc(100% - 16px);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.clip .dur{position:absolute;right:6px;top:6px;font-size:10px;font-variant-numeric:tabular-nums;color:#fff;background:#00000080;border-radius:5px;padding:1px 5px}.handle{position:absolute;top:0;width:22px;height:100%;background:var(--clip-border-sel);display:flex;align-items:center;justify-content:center;z-index:6;touch-action:none}.handle:before{content:"";width:3px;height:28px;border-radius:2px;background:#000}.handle.left{left:0;border-radius:8px 0 0 8px}.handle.right{right:0;border-radius:0 8px 8px 0}.add-tile{position:absolute;top:0;width:64px;height:84px;border-radius:8px;border:1.5px dashed rgba(255,255,255,.25);color:var(--muted);display:flex;align-items:center;justify-content:center;background:#ffffff08}.playhead{position:absolute;top:0;bottom:0;left:50%;width:2px;background:var(--playhead);transform:translate(-1px);pointer-events:none;z-index:8}.playhead:before{content:"";position:absolute;top:0;left:50%;transform:translate(-50%);width:10px;height:10px;border-radius:2px;background:var(--playhead)}.timeline-empty{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center}.timeline-empty .big-add{display:flex;flex-direction:column;align-items:center;gap:8px;color:var(--text)}.timeline-empty .big-add .circle{width:56px;height:56px;border-radius:16px;background:var(--accent);display:flex;align-items:center;justify-content:center}.timeline-empty .big-add span{font-size:13px;color:var(--muted)}.dock{flex:0 0 auto;display:flex;align-items:stretch;gap:4px;height:76px;padding:6px 8px;border-top:1px solid var(--line);background:var(--panel);overflow-x:auto;scrollbar-width:none}.dock::-webkit-scrollbar{display:none}.tool{flex:0 0 auto;min-width:58px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;border-radius:12px;color:var(--text);padding:6px 8px}.tool .ic{width:26px;height:26px;color:var(--text)}.tool .lbl{font-size:10px;color:var(--muted);font-weight:500}.tool.danger .ic{color:var(--danger)}.tool.primary .ic{color:var(--accent)}.overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#000000c7;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);display:flex;align-items:flex-end;justify-content:center;z-index:50}.sheet{background:var(--panel);border-radius:20px 20px 0 0;padding:20px 20px calc(24px + env(safe-area-inset-bottom));width:100%;max-width:480px;border-top:1px solid var(--line)}.sheet .grip{width:38px;height:4px;border-radius:2px;background:var(--elev);margin:0 auto 16px}.sheet h3{margin:0 0 6px;font-size:18px}.progress{height:8px;background:var(--panel-2);border-radius:6px;overflow:hidden;margin:16px 0 8px}.progress>div{height:100%;background:var(--accent);transition:width .15s linear}.btn{border-radius:12px;padding:13px 16px;font-weight:600;font-size:15px;background:var(--panel-2);color:var(--text);width:100%}.btn.primary{background:var(--accent)}.btn.primary:active:not(:disabled){background:var(--accent-press);opacity:1}.btn.ghost{background:transparent;color:var(--muted)}.row{display:flex;gap:10px;align-items:center}.muted{color:var(--muted)}.hidden-input{display:none}.export-preview{width:100%;border-radius:12px;margin:8px 0 4px;background:#000;max-height:38vh}.toast{position:fixed;left:50%;bottom:calc(96px + env(safe-area-inset-bottom));transform:translate(-50%);max-width:86%;z-index:60;padding:11px 16px;border-radius:12px;font-size:13px;font-weight:500;text-align:center;background:#28282cf5;color:#fff;box-shadow:0 8px 24px #00000080;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.toast.error{background:#b42834f5}