Home page: How it works, Source and Pantheon were in the topnav next
to cross-site tabs. Moved them plus Sign in and Verify into an overlay
sidebar on the left edge — same shape as Sirius.X and Theseus.X —
pointer-events:none, opacity 0.35 by default, hover brightens with a
blurred backdrop, active section painted acid green,
IntersectionObserver replaced with scroll-position tracking so the
final section still activates when the reader hits the page end.
Topnav collapses to the site tabs the header still owns: Hephaestus.X ·
Docs · Explore repos · Sign in.
Docs page: the two-column grid with an inline .toc left column has
been swapped for the same overlay rail. The 13 chapter titles now sit
at the left edge, keep their numbered mono prefix via CSS counter,
and stay legible under the semi-transparent hover backdrop. Content
column is centred at 820px so the reading axis is on the middle of
the viewport rather than shifted right by a sidebar. Icon rail at
64px on medium; sidebar hidden altogether on mobile because there is
no room for a 13-item rail.
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