body { font-family: Arial, sans-serif; margin: 0; padding: 0; }
header { background: #f5f5f5; padding: 20px; text-align: center; }
header h1 { margin: 0; }
section { padding: 20px; }
footer { background: #333; color: #fff; text-align: center; padding: 10px; }
a { color: #007BFF; text-decoration: none; margin: 0 10px; }