body { font-family: Arial, sans-serif; background-color: #f5f7fa; margin: 0; padding: 0; }
header { background-color: #333; color: white; padding: 1rem; text-align: center; }
nav a { color: #f5f7fa; margin: 0 10px; text-decoration: none; }
main { padding: 2rem; }
footer { text-align: center; padding: 1rem; background-color: #eee; }