The bands real pages are built from

The pieces that live inside these sections — buttons, ratings, price anchors, guarantees, countdowns — cropped from real pages, are the Element Library. Composition of sections into pages: Page designs. Strategy across pages: Funnel designs.

Method: every crawled page is segmented into full-width bands and each band classified into a section archetype by deterministic DOM signals: no LLM, no opinion. Prevalence counts each archetype once per page, across pages crawled all the way to the footer (partial crawls are held back, not guessed). "Typically sits" = the average of the section's position within the page body (0 = top, 1 = bottom). Scoped to the pages we've crawled, not "the web"; auto-updating as the corpus grows.