Increasing vertical margin to Summary block

Site URL: https://puma-orb-9lss.squarespace.com/news

Hi, I am using the plugin Lazy Summaries. It has the options to edit the margin (gutter width). But it doesn't let me edit the vertical and horizontal "gutter width" or margin separately. 

I found the settings in the code. And the gutter is effecting gallery like this. 

#block-yui_3_17_2_1_1604436917292_4899 .sqs-gallery-design-autogrid-slide {
    width: 30.897703549060545%;
    margin-right: 3.653444676409186%;
    margin-bottom: 3.653444676409186%;
}

So I added this..

.sqs-gallery-design-autogrid-slide {
  margin-bottom: 20px !important
}

However, these percentages adjust based on the page size. So by doing this this code injection does not adjust.

I'm totally stumped as to how I can increase the bottom margin while still allowing it to adjust. 😔

If anyone knows what might help please let me know. Would be greatly appreciated.