Vanilla-Extract migration

[rhengles]

I am in the process of converting Bootstrap and Bootswatch themes from SCSS to Vanilla-Extract, using Solid v2.0 beta components to test.

it has a Playwright-driven screenshot pipeline: it renders every route/state/theme combination, generate the corresponding CSS artifacts, and compare screenshots as the source of truth to catch even tiny regressions. The code tackles real-world Bootstrap complexity (theme-scoped CSS variables, class-only styling constraints, tricky selector patterns, and Bootstrap JS overlays like popovers/modals that render outside the normal DOM subtree), and includes a custom override layer in a local Bootstrap JS fork to support safer class/selector customization.

The project is actively in progress and not complete yet, but it’s being built with a rigorous, testable migration strategy aimed at producing a maintainable, modern SolidJS + Bootstrap/Bootswatch codebase with reproducible visual validation.

See https://github.com/arijs/bootswatch-solid/blob/main/docs/ve-architecture.md