diff --git a/docs/backend.md b/docs/backend.md
index 6adf675..ab769ba 100644
--- a/docs/backend.md
+++ b/docs/backend.md
@@ -34,11 +34,11 @@ markdown-it-py renderer (html passthrough + attrs, footnote, deflist, tasklists,
The shared page layout as an html5tagger `Template` with placeholders (`Title`, `Brand`, `Banner`, `Nav`, `Sidebar`, `Main`), nav rendering straight from the `Data.menu` tree (siblings sorted by `Node.order`; nav links to content-less labels point at their first child via `first_leaf`, the first published descendant with content), and page/404 rendering.
-Content pages get SEO/social meta (description, canonical link, Open Graph + twitter card) from heuristics over the rendered article: the description is the first paragraph's text; the card image is the node's own `Node.image` when one resolves (nearest ancestor, front page last — see docs/content-model.md), otherwise mined from the article, preferring a `{.hero}`-classed image, then the first raster `
`, then the first SVG; the first `