.card {
  overflow: hidden;
  position: relative;
}
.card :after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(255,255,255,0.3);
  opacity: 0;
  transition: opacity .25s;
}
.card img {
  transition: transform .25s;  
}
.card:hover img {
  transform: scale(1.2);
}