Button Animations in CSS

/* Ripple Effect */
.ripple {
  position: relative;
  overflow: hidden;
}

.ripple::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255,255,255,0.5);
  transform: translate(-50%, -50%);
}

.ripple:active::before {
  animation: ripple 0.6s;
}

@keyframes ripple {
  to {
    width: 300px;
    height: 300px;
    opacity: 0;
  }
}