body { font-family: sans-serif; margin: 0; padding: 1rem; background: #f2f2f2; }
nav { background: #333; padding: 1rem; }
nav a { color: white; margin-right: 1rem; text-decoration: none; }
main { background: white; padding: 2rem; margin-top: 1rem; border-radius: 8px; }