div.gallery{margin:15px;border:2px solid #ccc;float:left;width:30%}div.gallery:hover{border:2px solid #777}div.gallery img{width:100%}div.desc{padding:15px;text-align:center;font-weight:700}div.sticky{position:-webkit-sticky;top:0}h2{display:block;font-size:1.8em;margin-bottom:.1em;margin-left:0;margin-right:0;font-weight:700}h3{display:block;font-size:1.6em;margin-bottom:.1em;margin-left:0;margin-right:0;font-weight:700}