body{font:16px/1.5 system-ui,sans-serif;display:grid;place-items:center;min-height:100vh;margin:0;background:#f4f7fa;color:#274461}.card{margin:24px;padding:28px;border:1px solid #dbe3ea;background:white;border-radius:12px;max-width:520px}h1{font-size:21px}