Apologies if this is the incorrect place to ask, please move this thread if necessary.
I'm trying to wrap my head around Flarum website/style design. It looks like it mostly involves using a CSS input in the admin panel and extensions. What I'm trying to figure out right now is how to create a center column for the website content with a background image on each side.
My current website is: https://squattheplanet.com
Which has this design (using a different forum software that I'm working on moving to Flarum), so please take a look at that if you'd like to see an example of what I'm trying to achieve.
So I guess my question is what would be the best CSS to use to create this kind of layout for Flarum?
EDIT: I figured it might be helpful to have a screenshot of my current design as well.