Show gallery in one line on mobile

Site URL: https://www.bridgef61.com/campaign

Hi all, 

I'm trying to show the logo gallery and people gallery on this page as one row on mobile (not split into lines of two as it does currently), does anyone know how to do that?

Password for the page is 'BF61'

Thanks so much

Charlotte

Add to Design > Custom CSS

/* Campaign Gallery */
@media screen and (max-width:767px) {
body#collection-62628f6967a169595c651d1f .gallery-grid-wrapper {
    grid-template-columns: repeat(1,1fr) !important;
}
}