Follow-up to the light-mode contrast fix; no visual change on the catalog.
- Edit the existing light .heroEyebrow rule in place instead of shadowing
it from the appended block (it was left dead at the old #a8860a).
- One rule per component: .starPill, .capChip, .envChip, .copyBtn,
.highlight, .versionPill/.platformPill and .categoryChip each had colour
in one block and border/background in another; .categoryBtnActive set its
colour twice; .docsLink:hover/.emptyCtaSecondary:hover got a colour that
the later hover rule always overrode.
- The amber was hardcoded ~20 times although it is the theme's own
--ifm-color-primary-darker (the search icon's is --ifm-color-primary);
use the variables, including for --plugin-catalog-official.
- Share the light link blue between the list and detail pages via
--plugin-catalog-link so the two can't drift.
- Plugin detail/author pages used #8a6d00 for light star counts while the
list now uses the darker amber; align them on the same variable.
Verified: computed colour/background/border/shadow of every element on the
catalog, a plugin page, an official plugin page, an author page and the
empty state, in both themes plus hover on 19 controls, is identical to the
contributor's head except the intended star colour on detail/author pages.
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