body{font:1em;background:url(/fixtures/image2.png);background:#00f}#main1{background-image:url(/fixtures/image3.png)}#main2{background:transparent url(/fixtures/image1.png) no-repeat center center,transparent url(/fixtures/image2.png) no-repeat center center,transparent url(/fixtures/image3.png) no-repeat center center}#main3{background-image:url(/fixtures/image1.png)}#main4{background-image:url(/fixtures/image4.svg)}@media (min-width:400px){#application{width:400px;margin:0 auto;background-image:url(/fixtures/image3.png)}}