.thumbnail { 
    display:block; 
    position: relative;
    z-index:999; 
    cursor: pointer; 
    -webkit-transition-property: all; 
    -webkit-transition-duration: 0.3s; 
    -webkit-transition-timing-function: ease; 
    } 
    
    /*change the number below to scale to the appropriate size*/ 
    .thumbnail:hover { 
    transform: scale(3); 
    z-index:9999999; 
    
    }