Replace the grey theme with a green-slate light/dark pair

PaperMod ships grey on grey, which read as flat and dim on pages that are
mostly tables. Both schemes are now redefinitions of PaperMod's own
variables, so the theme picks them up without further overrides, plus
--accent, --warm and --wash for the placements below. Every text pair
clears WCAG AA.

Venue tables drop the full 1px grid for horizontal rules, a tinted header
and an accent row hover; domain and tag code spans become chips. Warm
marks the one cell worth finding first in a headered table — the ICORE
rank, the SCImago quartile, the still-open cycle — and detail-page fact
tables are excluded, since bold there is a row label, not emphasis.

The FullCalendar variable mapping was dark-only, leaving light mode on
the library's stock chrome; it now maps once through theme variables and
covers both. Event colours were saturated with white text on top, so they
become five pale chips carrying explicit dark ink, legible on either
theme.

Ranks were also emitting '**A***', which closes the emphasis on the
second star and leaves the third loose — visible once ranks had their own
colour.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

site/content/cloud-edge/venues/conferences/OSDI/_index.md

@@ -23,7 +23,7 @@ camera_ready: Jun 3, 2027
 
 | | |
 |---|---|
-| **ICORE Rank** | **A*** |
+| **ICORE Rank** | **A\*** |
 | **Domains** | `edge-and-cloud`, `operating-systems`, `distributed-systems` |
 | **Website** | [https://www.usenix.org/conference/osdi26](https://www.usenix.org/conference/osdi26) |
 | **Latest digest** | [OSDI 2025](/cloud-edge/digests/osdi-2025/) — 13 papers |