.bg{background-size:cover;background-position:100% 0}.overlay{top:0;right:0;bottom:0;left:0;background-color:rgba(0,0,0,.5);z-index:5}.box,.overlay{position:absolute}.box{top:20px;left:20px;right:20px;z-index:10}@media (min-width:768px){.box{left:15%;right:auto;top:50%;transform:translate(-15%,-50%)}}