- Add custom properties for customization
- Add default button styles
- Add default form element styles
- Add headerless tables
- Add spinner helper
- Update content font size (15px => 16px)
- Update heading sizes and margins
- Update task list styles
- Update link styles
- Update callout helper styles
- Fix font consistency (e.g., search field)
- Fix border radius consistency
- Fix codeblock focus style
- Fix scrollbars on macOS (use native)
- Reduce unnecessarily high specificity

- Update example html page
- Update sidebar with explicit bold
- Update styles to accomodate UI kit
- Rename “Writing more pages”
- Add light/dark mode images
- Add ins and samp styles (GFM compatibility)

- Add configurable max-width (Fix #2429)
- Add z-index vars for maintainability
- Fix .content style conflicts
- Update navbar and GitHub corner styles