body{font-family:Arial,sans-serif;margin:0;line-height:1.6;color:#222}
header,footer{background:#0f172a;color:#fff;padding:20px}
nav a{color:#fff;margin-right:15px;text-decoration:none}
.container{max-width:1100px;margin:auto;padding:20px}
.hero{padding:80px 20px;background:#f4f4f4}
.btn{display:inline-block;padding:12px 20px;background:#2563eb;color:#fff;text-decoration:none;border-radius:6px}