- The open hamburger panel now fills the viewport below the sticky bar
(100dvh, measured bar offset) and locks the page behind it. Locking only
the root element: locking body too made it its own scroll container and
un-stuck the bar.
- Front-page scroll-spy: the current chapter marker, mobile label/counter,
desktop "Chapter N of M" line and both progress bars follow the reader
through "In This Issue"; passed chapters read in ink. The sidebar
auto-scrolls to keep the current chapter in view.
- The sidebar scrollbar sits in a reserved gutter instead of over the text.
- Hamburger cross-fades to a close icon; 44px tap targets on phones.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01MD4VWGq6mGcd8Bg67qyx9k
