body { font-family: Arial, sans-serif; margin: 0; padding: 0; line-height: 1.6; }
header, nav, footer { background: #eee; padding: 1em; }
nav ul { list-style: none; padding: 0; display: flex; gap: 1em; }
nav ul li { display: inline; }
main { padding: 1em; }
footer { text-align: center; font-size: 0.9em; }