.slider{overflow:hidden;position:relative}.slider .nav{position:absolute;width:100%;top:50%;margin-top:-50px;display:none;height:0;z-index:1}.slider:hover .nav{display:block}.slider .nav img{height:100px}.slider .nav .prev{float:left;margin-left:0;cursor:pointer}.slider .nav .next{float:right;margin-right:0;cursor:pointer}.slider .slides{height:100%;float:left;padding:0;margin:0}.slider .slides li{height:100%;float:left;list-style:none;background-size:cover;background-position:center center;background-repeat:no-repeat}