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