@keyframes push {
  50% {
    -webkit-transform: scale(0.95);
    transform: scale(0.95);
  }

  100% {
    -webkit-transform: scale(1);
    transform: scale(1);
  }
}

.push {
  display: inline-block;
  -webkit-transform: translateZ(0);
  transform: translateZ(0);
  box-shadow: 0 0 1px rgba(0, 0, 0, 0);
}
.push:hover, .push:focus, .push:active {
  -webkit-animation-name: push;
  animation-name: push;
  -webkit-animation-duration: 0.3s;
  animation-duration: 0.3s;
  -webkit-animation-timing-function: linear;
  animation-timing-function: linear;
  -webkit-animation-iteration-count: 1;
  animation-iteration-count: 1;
}