Plan step 36, navigation review. The Tailwind-era rail-collapsed:
variant is now plain selectors in 26 rules, each repeated in five
window bands, across navigation-rail.css, navigation-rail-item.css,
navigation-rail-section.css and layout/scaffold.css; the tests pinned
a few of them. A new test walks every rule whose :where() names the
rail and fails when a copy drifts from the seven conditions for its
band, or when a rule is drawn collapsed in some bands but not all five.
ComponentStylesheet gains rules() for it.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Qwx5USif3wFFmxtHg5U1g9
