Kyle Pope e630832e76 Fix weekend header cells showing different background in Firefox
FC applies its own weekend background to header <th> elements too.
Force weekend header cells to use the same hsl(0 0% 8% / 0.65) as
weekday headers with !important to override FC's built-in styling.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
2026-03-13 21:14:21 +08:00
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