.banner{min-height:75vh;background-image:url(../img/arista-mobile-header.7763c455.png);background-repeat:no-repeat;background-attachment:fixed;background-position:50%;background-size:cover}img{position:relative;top:-50%}@media(min-width:768px){.banner{background-image:url(../img/arista-desktop-header.817d839a.png)}}