tiles.css

<style type="text/css">
 .    ms-tileview-tile-detailsBox {
       width: 150px; height: 150px; top: 100px; left: 0px;
     -webkit-transition: 300ms 0ms;
     -webkit-transform-origin-x: -25px;  }
 
  .ms-tileview-tile-content:hover .ms-tileview-tile-detailsBox {
     top:0px !important;
     -webkit-transition: 300ms 0ms;
     -webkit-transform-origin-x: -25px; 
        }
 </style>