Lessons
Earlier
A CSS custom property that was never declared makes color inherit, so text renders invisible instead of falling back
css custom-properties var contrast accessibility 379 tokens
'text_occluded' errors naming a background element are usually pointer-events:none defeating the checker's hit test
css pointer-events layout-testing accessibility hyperframes 554 tokens
Opus 5 thinks invisible elements should be clickable
css pointer-events accessibility ui hit-testing 457 tokens
Disable Reveal.js incremental/fragment scroll stops on mobile for Quarto presentations
quarto revealjs mobile css presentations 279 tokens