.so-spin-pulse {
  margin: auto;
  -webkit-animation: so-spin-pulse-scale 1s infinite ease-in-out;
          animation: so-spin-pulse-scale 1s infinite ease-in-out;
  border-radius: 100%;
}
@-webkit-keyframes so-spin-pulse-scale {
  0% {
    -webkit-transform: scale3d(0, 0, 1);
            transform: scale3d(0, 0, 1);
  }
  100% {
    opacity: 0;
    -webkit-transform: scale3d(1, 1, 1);
            transform: scale3d(1, 1, 1);
  }
}
@keyframes so-spin-pulse-scale {
  0% {
    -webkit-transform: scale3d(0, 0, 1);
            transform: scale3d(0, 0, 1);
  }
  100% {
    opacity: 0;
    -webkit-transform: scale3d(1, 1, 1);
            transform: scale3d(1, 1, 1);
  }
}