- Hero h1 was a fixed text-[44px] — overflowed narrow phones. Now
text-[30px] sm:text-[40px] md:text-[56px].
- Hero grid children get min-w-0 so the code blocks' overflow-x-auto
actually constrains instead of widening the page.
- Marketing nav: the inline links were hidden below md with no fallback.
Added a hamburger MobileMenu; "Sign in" collapses into it on the
smallest screens.
- Section vertical padding is now responsive (py-14 sm:py-20).
- globals.css: overflow-x: clip on <html> as a safety net.
- docs: the 240px sidebar is hidden below lg, article gets min-w-0.
- dashboard header: nav labels collapse to icons on small screens.
Verified: next build passes (40/40 pages).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>