:root{--bg: #0e1116;--bg-elev: #161b22;--bg-inset: #0b0e12;--border: #2a313c;--border-soft: #21272f;--text: #e6e9ef;--muted: #9aa4b2;--accent: #4c8dff;--accent-press: #3b78e0;--accent-contrast: #ffffff;--danger: #f2545b;--radius: 10px;--radius-sm: 7px;--shadow: 0 6px 24px rgba(0, 0, 0, .35);color-scheme:dark}*{box-sizing:border-box}html,body{margin:0}body{background:var(--bg);color:var(--text);font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;font-size:14px;line-height:1.5;-webkit-font-smoothing:antialiased}.app-header{display:flex;align-items:baseline;gap:12px;padding:14px 20px;border-bottom:1px solid var(--border-soft);background:linear-gradient(180deg,var(--bg-elev),var(--bg));position:sticky;top:0;z-index:10}.app-header h1{font-size:18px;font-weight:650;margin:0;letter-spacing:.2px}.app-header .sub{color:var(--muted);font-size:13px}.app-header .ver{margin-left:auto;color:var(--muted);font-size:12px;border:1px solid var(--border-soft);border-radius:999px;padding:1px 9px}.app-main{max-width:1080px;margin:0 auto;padding:20px;display:flex;flex-direction:column;gap:16px}.toolbar{display:flex;gap:8px;flex-wrap:wrap;align-items:center;padding:12px;background:var(--bg-elev);border:1px solid var(--border-soft);border-radius:var(--radius)}.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.grow{flex:1 1 auto}.sep{color:var(--muted);opacity:.6}.btn,input[type=file]::file-selector-button{appearance:none;border:1px solid var(--border);background:var(--bg-inset);color:var(--text);padding:6px 12px;border-radius:var(--radius-sm);font:inherit;cursor:pointer;transition:background .12s ease,border-color .12s ease,opacity .12s ease}.btn:hover:not(:disabled),input[type=file]::file-selector-button:hover{border-color:var(--accent)}.btn:disabled{opacity:.45;cursor:not-allowed}.btn-primary{background:var(--accent);border-color:var(--accent);color:var(--accent-contrast);font-weight:600}.btn-primary:hover:not(:disabled){background:var(--accent-press)}input[type=url],input[type=text]{background:var(--bg-inset);border:1px solid var(--border);color:var(--text);border-radius:var(--radius-sm);padding:6px 10px;font:inherit;min-width:0}input[type=url]:focus,input[type=text]:focus{outline:none;border-color:var(--accent)}input[type=file]{color:var(--muted);font-size:13px}label.check{display:inline-flex;align-items:center;gap:6px;color:var(--muted)}input[type=range]{-webkit-appearance:none;appearance:none;height:6px;background:var(--bg-inset);border:1px solid var(--border-soft);border-radius:999px;outline:none}input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:16px;height:16px;border-radius:50%;background:var(--accent);border:2px solid var(--bg-elev);cursor:pointer}input[type=range]::-moz-range-thumb{width:14px;height:14px;border-radius:50%;background:var(--accent);border:2px solid var(--bg-elev);cursor:pointer}.card{background:var(--bg-elev);border:1px solid var(--border-soft);border-radius:var(--radius);padding:16px}.card h2{margin:0 0 8px;font-size:15px;font-weight:600}.stage{position:relative;display:flex;justify-content:center;padding:16px;background:var(--bg-inset);border:1px solid var(--border-soft);border-radius:var(--radius);user-select:none;-webkit-user-select:none}.stage-inner{position:relative;width:min(100%,calc(80vh * var(--ar, 1.7778)));aspect-ratio:var(--ar, 1.7778);margin:0 auto;border-radius:6px;overflow:hidden;box-shadow:var(--shadow);background:#000;line-height:0}.stage-inner canvas{display:block;width:100%;height:100%;touch-action:none;-webkit-user-drag:none}.stage-inner .overlay{position:absolute;inset:0;pointer-events:none}.stage.clickable .stage-inner canvas:first-child{cursor:crosshair}.stage:fullscreen{display:flex;align-items:center;justify-content:center;background:#000;padding:0;border:none}.stage:fullscreen .stage-inner{width:min(100vw,calc(100vh * var(--ar, 1.7778)));border-radius:0;box-shadow:none}.fs-hud{display:none}.stage:fullscreen .fs-hud{display:flex;flex-direction:column;gap:8px;position:absolute;left:0;right:0;bottom:0;padding:18px 28px 22px;background:linear-gradient(0deg,#000000bf,#0000);z-index:5}.fs-hud-row{display:flex;align-items:center;gap:12px;color:var(--text)}.fs-hud-row .grow{flex:1 1 auto}.fs-hud .timeline,.fs-hud input[type=range]{width:100%}.fs-help{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;padding:24px;background:#06090db8;z-index:6}.fs-help .panel{background:var(--bg-elev);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px 24px;max-width:560px;width:100%}.fs-help h3{margin:0 0 14px;font-size:16px;font-weight:600}.fs-help dl{display:grid;grid-template-columns:auto 1fr;gap:9px 20px;margin:0;align-items:baseline}.fs-help dt{white-space:nowrap}.fs-help dd{margin:0;color:var(--muted)}.fs-help .close-hint{margin:16px 0 0}.timeline{position:relative}.marks{position:relative;height:12px;margin-top:3px}.marks .tick{position:absolute;top:0;width:2px;height:12px;background:var(--accent);transform:translate(-1px);border-radius:1px}.marks .tick.hidden{background:var(--muted);opacity:.75;height:8px;top:2px}.marks .tick.estart{background:#34d399;height:14px;top:-1px;width:3px}.marks .export-span{position:absolute;top:3px;height:6px;background:#34d3992e;border-radius:3px}.status{color:var(--muted);margin:0;min-height:1.4em}.muted{color:var(--muted)}.mono{font-variant-numeric:tabular-nums}kbd{font:inherit;font-size:12px;background:var(--bg-inset);border:1px solid var(--border);border-bottom-width:2px;border-radius:5px;padding:1px 5px;color:var(--text)}.hints{color:var(--muted);font-size:12.5px;display:flex;gap:12px;flex-wrap:wrap}code{background:var(--bg-inset);border-radius:4px;padding:0 4px}