body {
  position: relative;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;

  background:
    linear-gradient(90deg, rgba(0,255,200,0.15) 1px, transparent 1px),
    linear-gradient(rgba(0,255,200,0.15) 1px, transparent 1px);
  background-size: 40px 40px;

  transition: transform 0.15s ease-out;
}