.pulsating_circle {
  position: relative;
  left: 50%;
  top: -18px;
  transform: translateX(-50%) translateY(-50%);
  width: 30px;
  height: 30px;
  pointer-events: none;

  &:before {
    content: '';
    position: relative;
    display: block;
    width: 300%;
    height: 300%;
    box-sizing: border-box;
    margin-left: -100%;
    margin-top: -100%;
    border-radius: 45px;
    background-color: #01a4e9;
    animation: pulse-ring 2s cubic-bezier(0.215, 0.61, 0.355, 1) infinite;
  }
}

@keyframes pulse-ring {
  0% {
    transform: scale(.33);
  }
  80%, 100% {
    opacity: 0;
  }
}
