body { font-family: Arial, sans-serif; margin: 0; padding: 0; }
header, footer { background: #333; color: #fff; text-align: center; padding: 1rem; }
nav a { color: #fff; margin: 0 10px; text-decoration: none; }
.hero { padding: 50px; text-align: center; background: #f4f4f4; }
section { padding: 40px; }