.body-class-post-type-archive-blog {
    background-color: #010101;
    background-image: var(--archive-blog-bg);
    background-position: 50% 30px;
    background-repeat: no-repeat;
    background-size: contain !important;
}

@media all and (max-width: 576px) {
    .body-class-post-type-archive-blog {
        background-image: var(--archive-blog-bg-mobile, var(--archive-blog-bg));
    }
}