body {
    background-image: url(/narcissus\ painting\ \(1\).jpg);
    background-repeat: no-repeat;
    background-size: cover;
    background-position: center;
    min-height: calc(100vh - 30px);
}

@media (max-width: 600px) {
    body {
        background-image: url("/ud.jpg");

    }
}