body { font-family: sans-serif; background: #f2f2f2; margin: 0; padding: 0; } header, footer { background: #333; color: white; padding: 10px; text-align: center; } nav { background: #eee; padding: 10px; text-align: center; } main { padding: 20px; width: 60%; float: left; } aside { width: 30%; float: right; padding: 20px; background: #fff; }