.grid-bg{
  position:absolute;
  inset:0;
  background-image:
    linear-gradient(rgba(0,229,255,0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,229,255,0.08) 1px, transparent 1px);
  background-size: 70px 70px;
  mask-image: linear-gradient(to top, transparent 0%, black 45%);
  opacity: .35;
  z-index: 0;
  animation: gridMove 40s linear infinite;
}

@keyframes gridMove {
  0% { transform: translateY(0px); }
  100% { transform: translateY(70px); }
}