.img-overlay
{
    position: fixed;
    width:100%;
    height:100%;
    background-color: rgba(0,0,0,1);
    z-index: 999999999;
    top:0px;
    transition : 0.6s;
    cursor : zoom-out;
 
}

.img-overlay img
{
    position: relative;
    object-fit:contain;
    transition: 0.8s ease-in-out; 
}