Fraunces/Ubuntu font picker is gone. theme.js used to persist the
choice in localStorage and paint a pill in the corner; now it just
sets data-font-cmp="ubuntu" on <html> so every page that already
carries the html[data-font-cmp="ubuntu"] rules in its stylesheet
switches to Ubuntu — the Bitcoin Cash brand face — on load. Same
one-line runtime on both sirius-x and hephaestus.x theme.js.
Mobile bottom nav rail was rgba(11,14,20,.52) with no blur, so
whatever body text was scrolled behind it bled straight through the
half-transparent bar — first sentence of How it works ended up
visually merged with the sidebar icons on hephaestus.x, section
headings ran under the Sirius.x rail. Bumped to rgba(...,.94) and
added backdrop-filter:blur(12px); content underneath is now covered
instead of showing through. Same tweak on all six Sirius.X pages
plus Hephaestus.X home.
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