:root{--bg: #ffffff;--panel: #fafafa;--ink: #1d1d1f;--muted: #6e6e73;--faint: #86868b;--line: rgba(0, 0, 0, .1);--chip: #f0f0f2;--chip-hover: #e8e8ea;--chip-active: #e0e0e3;--accent: #0071e3;--radius-md: 10px;--radius-sm: 8px;--font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;--mono: "SF Mono", ui-monospace, Menlo, monospace}*{box-sizing:border-box}body{margin:0;font-family:var(--font);color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}button{font:inherit;color:inherit;border:none;background:none;padding:0;cursor:pointer}.app{height:100vh;height:100dvh;display:flex;overflow:hidden}.sidebar{width:250px;flex:none;display:flex;flex-direction:column;background:var(--panel);border-right:1px solid var(--line)}.brand{display:flex;align-items:center;gap:9px;padding:18px 18px 14px;font-weight:600;font-size:15px;letter-spacing:-.01em}.brand-mark{color:var(--ink)}.sidebar-label{padding:10px 18px 6px;font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.06em;color:var(--faint)}.demo-nav{flex:1;min-height:0;overflow-y:auto;padding:0 10px;display:flex;flex-direction:column;gap:2px}.nav-item{display:flex;flex-direction:column;align-items:flex-start;gap:2px;text-align:left;padding:9px 10px;border-radius:var(--radius-sm);transition:background .12s ease}.nav-item:hover{background:var(--chip)}.nav-item.active{background:var(--chip-active)}.nav-name{font-size:13.5px;font-weight:500}.nav-kind{font-size:11.5px;color:var(--muted)}.sidebar-foot{display:flex;gap:14px;padding:14px 18px;border-top:1px solid var(--line)}.sidebar-foot a{font-size:12px;color:var(--muted);text-decoration:none}.sidebar-foot a:hover{color:var(--ink)}.main{flex:1;min-width:0;display:flex}.player{flex:1;min-width:0;display:flex;flex-direction:column;overflow-y:auto}.demo-head{flex:none;display:flex;align-items:center;justify-content:space-between;gap:18px;padding:12px 20px;border-bottom:1px solid var(--line)}.demo-title{min-width:0}.demo-head h2{margin:0;font-size:15px;font-weight:600;letter-spacing:-.01em}.demo-head p{margin:1px 0 0;font-size:12.5px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.demo-actions{flex:none;display:flex;align-items:center;gap:12px}.status{font-size:12.5px;color:var(--muted);font-variant-numeric:tabular-nums}.dl{color:var(--accent);text-decoration:none;font-weight:500}.dl:hover{text-decoration:underline}.export-btn{padding:6px 14px;border-radius:980px;background:var(--ink);color:#fff;font-size:12.5px;font-weight:500;transition:opacity .12s ease}.export-btn:hover{opacity:.85}.export-btn:disabled{opacity:.4;cursor:default}.stage-frame{flex:1;min-height:220px;display:flex;align-items:center;justify-content:center;padding:20px}canvas.stage{display:block;max-width:100%;max-height:100%;width:auto;height:auto;border-radius:var(--radius-md);border:1px solid var(--line)}.stage-shell{max-width:100%;min-width:0;display:flex;align-items:center;justify-content:center}.stage-element{border-radius:var(--radius-md);border:1px solid var(--line)}.controls{flex:none;display:flex;align-items:center;gap:14px;padding:12px 20px;border-top:1px solid var(--line)}.play-btn{flex:none;width:34px;height:34px;border-radius:50%;display:grid;place-items:center;background:var(--ink);color:#fff;transition:opacity .12s ease}.play-btn:hover{opacity:.85}.play-btn svg{display:block}.time{flex:none;font-size:12.5px;color:var(--muted);font-variant-numeric:tabular-nums;display:flex;gap:5px}.time-cur{color:var(--ink);font-weight:500}.track{position:relative;flex:1;min-width:0}.chapters{display:flex;gap:4px}.chapter{flex:1 1 0;min-width:0;height:30px;padding:0 10px;border-radius:7px;background:var(--chip);color:var(--muted);font-size:11.5px;font-weight:500;display:flex;align-items:center;overflow:hidden;transition:background .12s ease,color .12s ease}.chapter:hover{background:var(--chip-hover)}.chapter.active{background:var(--chip-active);color:var(--ink)}.chapter-label{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:100%}.playhead{position:absolute;top:-3px;bottom:-3px;width:0;border-left:1.5px solid var(--ink);pointer-events:none;transition:left .03s linear}.seek{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;margin:0;opacity:0;cursor:pointer}.source{flex:none;border-top:1px solid var(--line)}.source summary{padding:10px 20px;font-size:12.5px;font-weight:500;color:var(--muted);cursor:pointer;-webkit-user-select:none;user-select:none}.source summary:hover{color:var(--ink)}.source pre{margin:0;padding:2px 20px 16px;max-height:300px;overflow:auto;font-size:12px;line-height:1.6;font-family:var(--mono);color:var(--ink);-moz-tab-size:2;tab-size:2}.source pre code{counter-reset:line;display:block;font-family:var(--mono)}.source pre .line:before{counter-increment:line;content:counter(line);display:inline-block;width:2.4em;margin-right:16px;text-align:right;color:var(--faint)}@media (max-width: 720px){.app{flex-direction:column}.sidebar{width:100%;flex:none;flex-direction:row;align-items:center;border-right:none;border-bottom:1px solid var(--line)}.brand{padding:12px 14px}.sidebar-label,.sidebar-foot{display:none}.demo-nav{flex-direction:row;padding:8px 10px;gap:4px;overflow-x:auto;overflow-y:hidden}.nav-item{flex:none}.nav-kind,.demo-head p{display:none}}