Sorry to post so many questions but I’m still learning about website design.
I decided I don’t want to have a sidebar at all. My homepage doesn’t have it, my blog posts don’t have it. But when I click on any category, there is still a right sidebar. How can I get rid of it?
If you are talking about the white space displayed in the category page after removing the sidebar then the above shared CSS code will remove it by expanding content width.