body{margin:0;padding:16px;font:15px/1.5 system-ui,-apple-system,Segoe UI,sans-serif;color:#18181b;background:#fff}button{font:inherit;padding:4px 12px;border:1px solid #a1a1aa;border-radius:6px;background:#f4f4f5;cursor:pointer}button:hover{background:#e4e4e7}input{font:inherit;padding:4px 8px;border:1px solid #a1a1aa;border-radius:6px}ul{margin:8px 0 0;padding-left:20px}nav{display:flex;gap:4px;margin-bottom:8px}