.ripple {
  display: inline-block;
  position: relative;
  left: 50%;
  top: 0;
  transform: translate3d(-50%, -50%, 0);
}

.ripple div {
  position: absolute;
  opacity: 1;
  border-radius: 50%;
  animation: ripple 1s cubic-bezier(0, 0.2, 0.8, 1) infinite;
}

.ripple div:nth-child(2) {
  animation-delay: -0.5s;
}


@keyframes ripple {

  0% {
    top: 28px;
    left: 28px;
    width: 0;
    height: 0;
    opacity: 1;
  }

  100% {
    top: -1px;
    left: -1px;
    width: 58px;
    height: 58px;
    opacity: 0;
  }
}



@include media-mobile {

  .ripple {
    width: vw(64);
    height: vw(64);

    div {
      border: vw(4) solid $main_color;
    }
  }
}

@include media-except-mobile {

  .ripple {
    width: 64px;
    height: 64px;

    div {
      border: 4px solid $main_color;
    }
  }
}