How do I reduce the side padding on gallery for mobile?

Site URL: http://www.basvanest.com

Hi Guys,

On my desktop site I have a spacer each side of the image gallery as the image would otherwise edge out of screen at the top and bottom.

Can I overwrite this in Mobile?

Or, alternatively. Should I ditch the spacers, use CSS to customise padding for both desktop and mobile?
If yes, how please?

Thank you!

To reduce padding on mobile, try adding to Design > Custom CSS

/* gallery padding on mobile */
@media screen and (max-width:640px) {
div#block-yui_3_17_2_1_1641497942316_3417 {
    padding-left: 0px !important;
    padding-right: 0 !important;
}
}