Buttons. Material Design ripple effect

css

.container {
  background-color: #c1c1c1;
  height: 500px;
  display: flex;
  justify-content: center;
  align-items: center;
}

.btn {
  background-color: orange;
  color: #fff;
  font-size: 40px;
  padding: 20px 20px;
}

/*Create ripple effec*/

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

.ripple:after {
  content: "";
  display: block;
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  pointer-events: none;
  background-image: radial-gradient(circle, #fff 10%, transparent 10.01%);
  background-repeat: no-repeat;
  background-position: 50%;
  transform: scale(10, 10);
  opacity: 0;
  transition: transform .5s, opacity 1s;
}

.ripple:active:after {
  transform: scale(0, 0);
  opacity: .3;
  transition: 0s;
}