@keyframes mouse-wheel {
  0% {
    top: 1px;
    opacity: 1;
  }
  50% {
    top: 30%;
    opacity: 0;
  }
  100% {
    top: 1px;
    opacity: 0;
  }
}
@keyframes mouse-scroll {
  0% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}