Furo

- Add dark mode support, based on `prefers-color-scheme`! 🎉
- Add more information in the documentation (reference and customisation).
- Add sourcemaps in the generated distribution.
- Add support for glossary lists.
- Drop the custom Read the Docs-specific CSS.
- Fix bad transparency handling for sidebar hover on Safari.
- Fix shrinking of sidebar brand image on Safari.
- Tweak spacing in admonitions.

- Add per-build hashes to asset URLs, to simplify cache invalidation.
- Tweak spacing in API documentation.

- Require Sphinx 3.
- Add styling for API documentation.
- Add styling for abbreviations.
- Add `clear` CSS property for left/right aligned content.
- Add styling to tweak the look of tabs.
- Drop the complexities introduced for custom homepages.
- Tweak color of problematic content.
- Tweak font-size handling for code-blocks.
- Tweak font-size handling for admonitions.
- Tweak spacing around code-blocks.
- Tweak how pages look with announcement and shorter-than-viewport content.
- Tweak styling for lists.
- Fix overlays to correctly show on top of content.
- Restructure sidebar scrolling, to correctly fill viewport.
- Change JS from the basic theme to use blocking network requests.
- Change inline table of contents to look like an error, nudging toward to not using it.

- Automate version management
- Use correct width for elements on small screens (100% instead of 100vw)

- Tweak header on small screens.
- Tweak spacing for small screens.
- Place "sidebar" directive's contents inline, on small screens.

- More fixes for Python 3.7 support.