body { font-family: Arial, sans-serif; margin: 0; padding: 0; }
header, footer { background: #111; color: white; padding: 1rem; text-align: center; }
nav { background: #444; padding: 0.5rem; text-align: center; }
nav a { color: white; margin: 0 1rem; text-decoration: none; }
main { padding: 1rem; }
ul { list-style: none; padding: 0; }
li { margin: 0.5rem 0; }