- Imported tokens.css directly into BaseLayout.astro.
- Removed legacy :root variable definitions from chapters.css, skills-review/styles.css, rules/styles.css, and styles.css.
- Added self-hosted --font-sans and --font-mono to tokens.css and updated legacy font stacks.
- Removed base.css.
- Added a build-output check in check-tokens.mjs to ensure the token layer is loaded in dist html files.
- Created `src/styles/tokens.css` establishing the canonical 10-color palette, 5 designated breakpoints, and the 6-step typography scale.
- Created `src/styles/base.css` to import the root variables for Astro components.
- Wrote down decisions regarding the `--blue` palette canonicalization and the font stack simplification in the task brief.
- These tokens will power the Astro component refactors in parallel tasks.
Marcos Paulo