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