body{margin:0;font-family:Arial,sans-serif;background:#111;color:#fff}
header{background:#0b1020;padding:20px;position:sticky;top:0}
nav a{color:#fff;margin-right:10px;text-decoration:none}
.hero{padding:80px 20px;text-align:center}
.container{max-width:1200px;margin:auto}
footer{background:#000;padding:20px;text-align:center}