Plan step 36, navigation review. The toolbar's recolouring rules (primary in a standard toolbar, on-primary-container and the pressed fill in a vibrant one) outrank button.css's disabled rule by specificity, so a disabled icon button in a toolbar drew in full primary. They now skip `:disabled` and `aria-disabled`, and the header no longer claims each override only meets a button's base selector. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Qwx5USif3wFFmxtHg5U1g9