#gallery .tile .caption{position:absolute;display:block;left:0;top:0;width:100%;height:100%;opacity:0;-webkit-transition:opacity .3s;-moz-transition:opacity .3s;-o-transition:opacity .3s;transition:opacity .3s;background:rgba(0,0,0,.4)}#gallery .tile:hover .caption{opacity:1}#gallery .tile:hover{cursor:pointer}