:root{font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial}body{margin:0;background:#f7f7f7}.container{max-width:720px;margin:0 auto;padding:16px}.card{background:#fff;border-radius:12px;padding:16px;box-shadow:0 1px 6px #00000014}.field{display:grid;gap:8px;margin-top:12px}input{padding:10px 12px;border-radius:10px;border:1px solid #ddd}button{padding:10px 12px;border-radius:10px;border:0;cursor:pointer}