:root{--bg: #1a1a1a;--panel: #222;--panel-2: #2a2a2a;--border: #333;--text: #ddd;--muted: #888;--accent: #58c4dd;--accent-2: #fc6255}*{box-sizing:border-box}html,body{margin:0;height:100%}body{background:var(--bg);color:var(--text);font:15px/1.6 system-ui,-apple-system,Segoe UI,Roboto,sans-serif}#app{display:flex;flex-direction:column;height:100vh}.topbar{display:flex;align-items:center;gap:1rem;padding:.75rem 1.25rem;border-bottom:1px solid var(--border);background:#151515}.brand{font-weight:700;font-size:1.2rem;letter-spacing:.5px;display:flex;align-items:center;gap:.5rem}.logo{width:16px;height:16px;border-radius:50%;background:var(--accent);box-shadow:0 0 12px var(--accent)}.tagline{color:var(--muted);font-size:.9rem}.tagline span{color:var(--accent)}.topbar .gh{margin-left:auto;color:var(--text);text-decoration:none;border:1px solid var(--border);padding:.3rem .7rem;border-radius:6px}.topbar .gh:hover{border-color:var(--accent);color:var(--accent)}.body{display:flex;flex:1;min-height:0}.sidebar{width:250px;flex-shrink:0;border-right:1px solid var(--border);overflow-y:auto;padding:1rem;background:#181818}.intro{font-size:.82rem;color:var(--muted);margin-bottom:1.2rem;line-height:1.5}.intro b{color:var(--text)}.cat{margin-bottom:1rem}.cat-name{text-transform:uppercase;font-size:.72rem;letter-spacing:1px;color:var(--muted);margin:.5rem 0 .3rem}.nav-item{display:block;width:100%;text-align:left;background:none;border:none;color:var(--text);padding:.4rem .6rem;border-radius:6px;cursor:pointer;font-size:.9rem}.nav-item:hover{background:var(--panel-2)}.nav-item.active{background:var(--panel-2);color:var(--accent);font-weight:600}.foot{margin-top:1.5rem;font-size:.78rem;color:var(--muted)}.foot a,.intro a{color:var(--accent)}.content{flex:1;overflow-y:auto;padding:1.5rem 2rem;min-width:0}.content h1{margin:0 0 .25rem;font-size:1.6rem}.desc{color:var(--muted);margin:0 0 1.5rem;max-width:70ch}.panes{display:grid;grid-template-columns:1fr 1fr;gap:1.25rem;align-items:start}@media (max-width: 1050px){.panes{grid-template-columns:1fr}}.code-pane,.render-pane{border:1px solid var(--border);border-radius:10px;overflow:hidden;background:var(--panel)}.pane-head{display:flex;align-items:center;justify-content:space-between;padding:.5rem .85rem;background:var(--panel-2);border-bottom:1px solid var(--border);font-size:.8rem;color:var(--muted)}.pane-head button{background:none;border:1px solid var(--border);color:var(--muted);border-radius:5px;padding:.15rem .5rem;cursor:pointer;font-size:.75rem}.pane-head button:hover{color:var(--accent);border-color:var(--accent)}pre{margin:0;padding:1rem;overflow-x:auto}code{font-family:SF Mono,JetBrains Mono,Consolas,monospace;font-size:.82rem;line-height:1.55;color:#cfe7ee;white-space:pre}.stage{aspect-ratio:16 / 9;display:flex;align-items:center;justify-content:center;background:#333}.stage canvas{width:100%;height:100%;display:block}.err{padding:.75rem 1rem;color:#ffb3ad;background:#3a2020;border-top:1px solid var(--accent-2);font-family:monospace;font-size:.8rem}