.pulse-btn {
  box-shadow: 0px 1px 4px #6c6c6c;

  &:hover,
  &.animated {
    animation: pulse 1s infinite;
  }

  @keyframes pulse {
    0% {
      transform: scale(1);
    }
    50% {
      transform: scale(1.2);
    }
    100% {
      transform: scale(1);
    }
  }
}