Unlayered CSS beats Tailwind's @layer utilities regardless of specificity, so base.css (and consumer stylesheets) overrode classes passed to components. Element defaults now live in @layer base and twui-* rules in @layer components. Third-party TinyMCE/Ace overrides stay unlayered. README documents wrapping consumer overrides in layers. Co-Authored-By: Claude Opus 5.5 <[email protected]>