Q re FSE settings in editor, background color mixup

Hi!

I love the FSE but I can’t figure out these two things:

1. I have set site background colors to a dark color (purple) so that header and footer extend with this color all the way to the top or bottom. The main body then in the page template is set to white background. Works well when displaying. When editing a specific page, the background *in*the*editor* will be purple (when displayed it will be white). This makes for hard editing! (Black text on dark purple.) How can I get the editor to use the template background for this part?
2. Also in the editor, the main body text goes all the way to the left and right page boundary (zero margin) while during regular display it uses the page settings which are the default 1200 px max. Where is that setting? It works on another site but I just can’t find the setting; I have searched high and low.

Thanks for any pointers!

Dirk

The page I need help with: [log in to see the link]