.pulse {
  -webkit-animation-name: pulse;
  animation-name: pulse;
}

@include keyframes(pulse) {
  0% {
    -webkit-transform: scale3d(1, 1, 1);
    transform: scale3d(1, 1, 1);
  }

  50% {
    -webkit-transform: scale3d(1.05, 1.05, 1.05);
    transform: scale3d(1.05, 1.05, 1.05);
  }

  100% {
    -webkit-transform: scale3d(1, 1, 1);
    transform: scale3d(1, 1, 1);
  }
}