a img { border: none; } 

.resource {}

.resource-unhighlighted {

   background-color:transparent;
   border:solid 1px transparent;
}

.resource-highlighted {
   padding-left:5px;
   padding-bottom:5px;
   padding-right:5px;
   padding-top:2px;
   background-color:#def;
   border:solid 1px black;
}