body{font-family:sans-serif;display:flex;align-items:center;justify-content:center;min-height:100vh;margin:0;background:#1a252f}
.box{background:#fff;padding:40px 60px;border-radius:8px;text-align:center;max-width:480px}
h1{color:#c0392b;font-size:2em;margin-bottom:8px}
p{color:#555}