body{margin:0;font-family:system-ui,-apple-system,Segoe UI,sans-serif;background:#0b0b0f;color:#f4f4f5}.app{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:1rem}button{font:inherit;padding:.5rem 1rem;border-radius:6px;border:1px solid #3f3f46;background:#18181b;color:inherit;cursor:pointer}button:hover{background:#27272a}