#tiles{list-style-type:none;position:relative;margin:0}#tiles li{width:200px;background-color:#fff;border:1px solid #dedede;-moz-border-radius:2px;-webkit-border-radius:2px;border-radius:2px;display:none;cursor:pointer;padding:4px}#tiles li img{display:block}#tiles li p{display:none}#tiles ali:nth-child(3n){height:175px}#tiles ali:nth-child(4n-3){padding-bottom:30px}#tiles ali:nth-child(5n){height:250px}#main{padding:30px 0}header h1{text-align:center;font-size:24px;font-weight:400;margin:30px 0 3px}header p{text-align:center;font-size:13px;color:#777;margin:0}