.loading_bg {
  width: 100%;
  height: 100%;
  position: absolute;
  z-index: 2;
  visibility: collapse;

  background-position: center center;

  /* Center and scale the image nicely */
  background-repeat: no-repeat;
  background-size: cover;
}

.no-webp .loading_bg {
  background-image: url("loading.png");
}

.webp .loading_bg {
  background-image: url("loading.webp");
}