body{margin:0;font-family:Arial,sans-serif;background:#111;color:#fff}
.hero{min-height:100vh;display:flex;flex-direction:column;justify-content:center;align-items:center;background:linear-gradient(135deg,#111,#333)}
.btn{background:#fff;color:#111;padding:12px 24px;text-decoration:none;border-radius:30px}
section{max-width:900px;margin:auto;padding:60px 20px}