@-webkit-keyframes arrow_anim {
  0% {
    left: 0;
    opacity: 0;
  }
  30% {
    left: calc(50% - 2.5px);
    opacity: 1;
  }
  100% {
    left: calc(50% - 2.5px);
    opacity: 1;
  }
}
@keyframes arrow_anim {
  0% {
    left: 0;
    opacity: 0;
  }
  30% {
    left: calc(50% - 2.5px);
    opacity: 1;
  }
  100% {
    left: calc(50% - 2.5px);
    opacity: 1;
  }
}