Plan step 38 review: the frame's structural rule that kept a section's own <h2> for screen readers (Tailwind's [&>section>h2]:sr-only before, a showcase.css rule during the rewrite) was removed as dead weight once every section had a real heading, so each page drew its title twice, the <h1> and an identical headline under it. The <h2>s are md-visually-hidden again, the frame's comment says why, and the section page test asserts it. The Layout section's description said "window size classes"; M3's term is breakpoints. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Qwx5USif3wFFmxtHg5U1g9