.overlay-animation {
  position: relative;
}
.overlay-animation:after {
  background: rgba(255, 255, 255, 0.3);
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 0;
  opacity: 1;
  z-index: 9;
  pointer-events: none;
}
.overlay-animation:hover:after {
  height: 100%;
  opacity: 0;
  -webkit-transition: all 400ms linear;
  transition: all 400ms linear;
}