.hvr-shadow {
  vertical-align: middle;
  transition-duration: 0.3s;
  transition-property: box-shadow;
}
.hvr-shadow:active,
.hvr-shadow:focus,
.hvr-shadow:hover {
  box-shadow: 0 10px 10px -10px rgba(0, 0, 0, 0.5);
}