<style> * {box-sizing: border-box;} body { margin: 0; font-family: Arial, Helvetica, sans-serif; } .header { overflow: hidden; background-color: #f1f1f1; padding: 20px 10px; } .header a { float: left; color: black; text-align: center; padding: 12px; text-decoration: none; font-size: 18px; line-height: 25px; border-radius: 4px; } .header a.logo { font-size: 25px; font-weight: bold; } .header a:hover { background-color: #ddd; color: black; } .header a.active { background-color: dodgerblue; color: white; } .header-right { float: right; } @media screen and (max-width: 500px) { .header a { float: none; display: block; text-align: left; } .header-right { float: none; } } </style>