You might be interested in this thread, which presents an experiment on adding discussions to existing web pages.
Broken layout on community.nodebb.org
I'm getting repeatable broken layouts when loading this forum, as if all CSS gets reset. The point at which this happens depends on the browser:
- Edge (44.18362.329.0): immediately after login the page displays using correct layout for a moment, then the layout breaks without any user action. Clearing cookies and reloading does not change this behavior.
- Chrome (77.0.3865.75) and Firefox (69.0): layout breaks after reloading the page or opening it a second tab. Using the forum in a single tab without reloading the page works.
Are you using a non-default skin? I noticed that most of them are broken here.