body{font:16px system-ui;background:#f8fafc;color:#0f172a;margin:0;padding:24px}main{max-width:360px;margin:10vh auto;background:white;border:1px solid #e2e8f0;border-radius:12px;padding:24px}h1{font-size:24px}p{line-height:1.5}label{display:grid;gap:6px;margin:16px 0}input,button{box-sizing:border-box;width:100%;font:inherit;padding:10px;border:1px solid #cbd5e1;border-radius:6px}button{background:#0f172a;color:white;cursor:pointer}[role=alert]{color:#b91c1c}