body {
    background-image: url("/assets/images/mainBG.jpg");
    background-position: 50% top;
    background-repeat: no-repeat;
    background-size: contain;
    border-top: 2px solid #0f3478;
    -webkit-background-size: contain;
    -moz-background-size: contain;
    -o-background-size: contain;
}

@media screen\0 {
    body {
        background-size: cover;
    }
}