Board Thread:General Discussion/@comment-46314627-20200819125543/@comment-45117243-20200819154709

There is no guide, writing custom CSS needs some amount of understanding how elements are structured and using the inspect tool. But we can try to solve the problems one by one. Can you please give a link to a page where you have a collapsible? I'll look at it later, when I have a bit more time, or someone else will do it before.

Also, for the Edit/Edit Source buttons, I think the standard way to get rid of them is not with CSS, but to add

anywhere in the page