* {
    margin: 0;
    padding: 0;
}

body {
    background: white;
}

.desktop,
.mobile {
    width: 100vw;
    height: 100vh;
    position: relative;
}

.desktop img,
.mobile img {
    top: 50%;
    left: 50%;
    
    width: 100%;
    max-width: 1280px;
    
    -webkit-transform: translate3d(-50%,-50%,0);
            transform: translate3d(-50%,-50%,0);
    
    position: absolute;
}

.mobile {
    display: none;
}

@media (max-width: 768px) {
    .mobile {
        display: block;
    }

    .desktop {
        display: none;
    }
}