.ripple-button {
  position: relative;
  overflow: hidden;
  transform: translate3d(0, 0, 0);
}

.ripple-button:after {
  content: "";
  display: block;
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  pointer-events: none;
  background-image: radial-gradient(circle, #000 10%, transparent 10.01%);
  background-repeat: no-repeat;
  background-position: 50%;
  transform: scale(10, 10);
  opacity: 0;
  transition: transform 0.5s, opacity 1s;
}

.ripple-button:active:after {
  transform: scale(0, 0);
  opacity: 0.2;
  transition: 0s;
}