body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:#f4f6f8;color:#1f2937;display:flex;min-height:100vh;align-items:center;justify-content:center}
main{background:#fff;padding:2.5rem 2rem;border-radius:12px;box-shadow:0 2px 12px rgba(0,0,0,.08);max-width:520px;text-align:center}
h1{margin:0 0 1rem;font-size:1.6rem}
p{margin:.5rem 0;line-height:1.5}