How do y'all manage branding between a static site and a web app


I’m new to webflow and am loving it so far. I generally build my webapp within authenticated routes and have the whole static + web app codebase be one. I’m building a site for a startup now and I wanted to use a builder to let the non technical people have access to the copy. I planned on using a subdomain for the webapp cheap color copies online. I was a little concerned about keeping the feel similar between the two sites. Do y’all bother importing the css?

I also saw forums where people load their react scripts inside their webflow site. I’d imagine that’d be a pain to test out locally and would lead to a huge site.