Bring handbook design more in line with our Brand Guidelines
Created by: felixfbecker
This makes our handbook styles follow the Brand Guidelines more closely. Concretely:
- Use our font (Source Sans/Code)
- Use our color palette
- Update all logos
- Tweak font sizes and line heights (I tried to stick to the guidelines, but had to make some exceptions for some headings because content didn't fit well)
Other changes:
- Remove dead CSS I noticed (if you see deleted CSS in the diff, it was never used, there is CSS later in the file overriding it)
- Use SVG favicon
- Make logo a bit larger
- Make
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when hovering a heading scale to font size of heading - There are also some autoformatting/consistency changes (I would really love to run Prettier over the whole repo sometime soon and set some automatic GitHub action up)
This is a bit of a prerequisite for my PR to add the career levels because I want those to look good, but extracted this part into its own PR.