#contact {
    background-image: url('img/footer-bg.png');
    background-repeat: no-repeat;
    background-size: cover;
    background-position: center;
}

@media (max-width: 639px) {
    .hero-bg {
        background-image: url('img/bg-mobile.png');
        background-repeat: no-repeat;
        background-size: contain;
    }
}