.media_block {
    position: relative;
    display: grid;
    border: none
}

.media_block__desktop-only {
    display: none
}

@media (min-width: 740px) {
    .media_block__desktop-only {
        display:grid
    }
}

.media_block__mobile-only {
    display: grid
}

@media (min-width: 740px) {
    .media_block__mobile-only {
        display:none
    }
}