7.1 Carousel Banner Spacing

Site URL: https://pigeon-orange-s7hm.squarespace.com/

Hi,

Could someone add some CSS for 7.1 to add spacing on a Squarespace reel (Squarespace circle member however most sites are on 7)? 

On most of these pages I have the carousel like the url: 

https://pigeon-orange-s7hm.squarespace.com/

I would like for all of these carousels found on most of the project pages to have some spacing i.e the blue on the page to be a divider between the images.

Require CSS for 7.1 Reel

Thanks! 

.gallery-reel-item-src {
    margin: 10px;
}