Hi,
You can deactivate the sidebar for the portfolio category and product category pages via appearance > customize > sidebar sections.
If you use this custom css code, you can remove the sidebar for the blog category pages;
Great, that works. How do I make the text column for the category description bigger. Even though the sidebar is gone, the category description is the same size. It looks a bid odd
Sorry, I meant how do I make the width of the text column wider, not the text size.
The paragraph of text looks very thin when it could take up more of the screen space. It is currently the same size as it was when the sidebar was there. Without the sidebar the paragraph width should be bigger.