Refactor handbook CSS into a file which is only included in the handbook
There is currently no place to put handbook-specific CSS which will result in it being included only in the handbook layout/pages.
This issue was extracted as a follow-on per this note in a separate issue.
Here's the notes from there:
It's probably best to create a handbook stylesheet (I'm surprised we don't already have one) and attach it to somewhere like /source/layouts/handbook-page-toc.haml.
I didn't do this. There is a source/stylesheets/pages/_handbook.scss, but it's pulled into every page via head.html.haml -> styles.css.scss. So, I just made a dedicated CSS file for this fix, and we can mention the code debt of needing to have a specific stylesheet scoped to the handbook as a follow-on MR (possibly by turning this specific fix file into a more generic handbook stylesheet as you suggested).
So, part of this issue should include removing the source/stylesheets/fixed-width-tables.css.scss
file and incorporating it into the new handbook-only CSS file.