Too much space above and below gallery on mobile

Site URL: https://www.belpapier.com/projekt-indywidualny

Hello, 

I would like to minimize the empty space above and below the gallery on a mobile page. I tried available css but without success!

Thank you in advance .

It looks like you solved with this CSS?

@media screen and (max-width: 767px) {
    .gallery-slideshow {
        margin-bottom:60px;
        margin-top: 20px
    }

    [data-section-id="615c5a6cd64d623b2ebaf46a"] {
        min-height: unset !important;
        height: 35vh !important;
    }
}