.jarallax {
  position: relative;
  z-index: 0;
}
.jarallax > .jarallax-img,
picture.jarallax-img img {
  position: absolute;
  object-fit: cover;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
}
