.starfield-layer {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

#starfield-layer-big {
  z-index: 1;
}

#starfield-layer-medium {
  z-index: 2;
}

#starfield-layer-small {
  z-index: 3;
}