Brand mark carried "Hephaestus" in forge orange and ".X" in plain ink
white, so the .X tail read as page chrome rather than part of the
brand — inconsistent with the acid .X pattern every other .x site now
uses. Wrapped the .X in <span class="x"> and gave .topnav .brand .x
the acid tint on both index and docs pages. Forge orange stays on the
name because that is Hephaestus's identity; the .X now signs off in
the ecosystem's shared colour.
Also aligned the footer's Pantheon column with the main pantheon
section: dropped the stale Fly.X entry, added Prometheus.X, Helios.X,
Hermes.X, and gave every entry the same Silentmode<span class="g">.X</span>
split so the acid tint on the suffix is consistent between the site
and the footer index.
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