Unable to remove white line from bottom of page

Hi,

I’m having trouble removing a white line that appears at the bottom of every page of my site.

I’ve removed the theme’s built in footer including site-info using display:none but the white line remains. I suspect it’s caused by a margin-bottom property but can’t for the life of me work out which one it is. Any help anyone can offer would be greatly appreciated as this is driving me up the wall.

The homepage is a static page and I’m using the “Eighties” theme. Here’s a link to my site: https://orlando.zone/

Thanks!