Explainer test page

This page exists to preview the explainer embed on its own, away from a real chapter. The video summary above was generated from docs/css/flexbox.md by the tools/docs-explains pipeline and published to Scrimba.

It lives under /css/ because ChapterExplain only renders on guided-doc routes (Layout.vue gates it behind isGuidedDoc), so a page at the site root would show no embed at all.

The embed itself comes from one frontmatter key:

explain: https://scrimba.com/explain/guide03nbb653s

Delete this file when you are done looking at it.