body{margin:0;font-family:Arial,sans-serif;color:#1f2937}
header,footer{background:#0f172a;color:#fff;padding:20px}
nav a{color:#fff;margin-right:16px;text-decoration:none}
.container{max-width:1100px;margin:auto;padding:40px 20px}
.hero{padding:80px 20px;background:#2563eb;color:#fff;text-align:center}
.card{border:1px solid #ddd;border-radius:8px;padding:20px;margin:16px 0}