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Contributing

c2.css is intentionally constrained. Contributions are welcome when they preserve the core idea: native HTML first, CSS only where it creates clear usability.

Before Opening A Pull Request

Run:

./test.sh

The full build must stay under 380B gzip unless the change explicitly updates the public record claim. The 200B build must stay at or below 200B gzip.

Design Rules

  • Prefer native HTML elements over recreated widgets.
  • Do not add JavaScript, fonts, image files, resets, or build tooling to the framework.
  • Keep class names byte-coded because class names ship in user HTML.
  • Favor selectors that improve multiple components at once.
  • Update README examples when behavior changes.
  • Keep size claims reproducible with gzip -9 -n.

Browser Changes

If a change depends on a newer CSS feature, document the fallback. c2.css should stay readable in older browsers even when a progressive enhancement is ignored.