body {
    background-image: url("../img/bg-mobile.png");
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    min-height: 100vh;
}

@media (min-width: 1200px) {
    body {
        background-image: url("../img/bg2.png");
        background-repeat: no-repeat;
        background-size: cover;
    }
}