.pulse {
  position: relative;
  isolation: isolate;

  &:after {
    content: " ";
    position: absolute;
    top: 0;
    left: 0;
    z-index: -1;
    display: block;
    width: 100%;
    height: 100%;
    background: inherit;
    border-radius: inherit;
    will-change: opacity, transform;
    animation: flatify-pulse 1.4s infinite;
  }
}