body { font-family: Arial, sans-serif; margin: 0; padding: 0; background: #f9f9f9; }
header, footer { background: #333; color: white; text-align: center; padding: 1em 0; }
nav { text-align: center; margin: 1em 0; }
nav a { margin: 0 10px; text-decoration: none; color: #007bff; }
main { padding: 20px; }
ul { line-height: 1.6; }