div.gallery { border: 1px solid #ccc; } div.gallery:hover { border: 1px solid #777; } div.gallery img { width: 100%; height: auto; } div.desc { padding: 15px; text-align: center; } * { box-sizing: border-box; } .responsive { padding: 0 6px; float: left; width: 24.99999%; } @media only screen and (max-width: 700px) { .responsive { width: 49.99999%; margin: 6px 0; } } @media only screen and (max-width: 500px) { .responsive { width: 100%; } } .clearfix:after { content: ""; display: table; clear: both; } <