body { font-family: Arial, sans-serif; margin: 0; padding: 0; }
header, footer { background-color: #2a5d84; color: white; padding: 1em; text-align: center; }
nav a { margin: 0 10px; color: white; text-decoration: none; }
main { padding: 20px; }
footer { font-size: 0.9em; }