@keyframes button-pulse {
  0% {
    opacity: 0.3;
    transform: scale3d(0.6, 0.4, 1);
  }
  75% {
    transform: scale3d(1.05, 1, 1);
  }
  100% {
    opacity: 0;
  }
}

@keyframes button-stretch {
  40% {
    transform: scale(0.96);
  }
  65% {
    transform: scale(1.02);
  }
  100% {
    transform: scale(1);
  }
}