body{margin:0;font-family:Arial,sans-serif;background:linear-gradient(135deg,#0f172a,#2563eb)}.page{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px}.card{background:#fff;padding:48px;border-radius:24px;text-align:center;box-shadow:0 20px 50px #00000040;max-width:600px;width:100%}h1{font-size:3rem;margin:0;color:#1e3a8a}p{color:#475569;font-size:1.2rem}button{background:#2563eb;color:#fff;border:none;padding:14px 24px;border-radius:12px;font-size:1rem}