body{font:18px system-ui;background:#111827;color:#f8fafc;min-height:100vh;margin:0;display:grid;place-items:center}main{max-width:40rem;padding:2rem}button{font:inherit;padding:1rem;border-radius:12px;border:0;background:#e5e7eb;color:#111827}button:focus-visible{outline:3px solid #a78bfa;outline-offset:4px}