Nav title: absolutely centered in the site-header, fades in via
IntersectionObserver when .story-hero__content scrolls above the fold.
Hidden on mobile (< 640px) where there is no room.
Back-to-top: fixed bottom-right pill, appears after 80% of the hero
viewport is scrolled past, smooth-scrolls to top on click.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Vgmzx8VTTTmCskSpQtsLTr
Overlay previously hard-hid with display:none when scrollY = 100vh, while
the title was still visible (it exits at ~115vh). Now fades in 0→0.65 over
the first 70vh then fades back out to 0 by 140vh (full hero height).
Scrolly caption changed from full-width to centered pill with
rgba(0,0,0,0.45) background — readable against any image regardless of tone.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Vgmzx8VTTTmCskSpQtsLTr
m038