Basic Cascading Style Sheet(CSS)

.bg__image {
  position: absolute;
  z-index: 0;
  left: 0;
  top: 0;
  right: 0;
  bottom: 0;
}

.object__fit {
  object-fit: cover; 
  width: 100%;
  min-height: 100%;
  height: auto;
}