header { background-color: #333; height: 60px; } nav ul { list-style: none; margin: 0; padding: 0; text-align: center; } nav li { display: inline-block; } nav li a { display: block; color: #fff; font-size: 18px; text-decoration: none; padding: 20px; } nav li a:hover { background-color: #555; }