[MarkPhamm]

Fixes #100
Fixes #101

Changes

• Header (extra.css, partials/header.html):
  • Below 960px only GitHub drops out, since it's in the drawer and the footer.
  • Docs, Demos and Quick start stay; Demos goes below 544px, Docs below 480px, and Quick start below 360px.
  • The home page has no nav drawer, so its hamburger (an empty overlay) is hidden there. It stays on docs pages from 960px to 1220px, where it opens the docs nav.
• Back to top: bottom-right instead of top-centre. It needs top: auto !important because Material sets top inline.
• Hero:
  • The FactInternetSales callout and the drawing/tables/rev title block sit in a row under the screenshot instead of on it.
  • dbt demo repo is a text link, so the three CTAs fit on one row at 1126px and wider. Between 961px and about 1100px, and on phones, the link wraps under the two buttons instead of a lone button.
• PR section: the github-actions comment is under the diff screenshot at every width.
• Home page footer: hide: footer drops the Next → Guide pager.
• Home page spacing: the closing CTA's top padding goes from 136px to 96px. FAQ rows span the content width; answers stay at 820px for line length.

Verified. Playwright, system Chrome, local mkdocs build --strict:

width	header overflow (home / guide)	hero CTA rows
320	0 / 0 px	2 (phone)
375	0 / 0 px	2 (phone)
740	0 / 0 px	1
900	0 / 0 px	1
1126	0 / 0 px	1 (was 2)

Screenshots checked at 375, 740, 1126 and 1440: callout, title block and PR comment no longer cover the images; Back to top is in the corner; no pager on the home page.

Not changed

• The step connector reaches badge 4, now that Website: JS error leaves 'From text to diagram' preview blank and quick-start step 4 empty #95 is fixed.
• Re-cropping hero.png and path-sql.png to about 1:1 is content work and isn't in this PR.

[github-actions]

Schema changes: origin/main → working tree

No schema changes.

_{Interactive diagram with changes highlighted: download the erd artifact from this run. Generated by qdbd.}