Tailwind v4 integrates as a Vite plugin and configures daisyui via the
CSS @plugin directive; the light theme is selected with data-theme on
<html>. Heading font sizes are re-asserted because Tailwind's preflight
resets them, which would otherwise shrink the hand-crafted headings.
Render A-series sheets in landscape (√2:1), size them off a single
--sheet-base variable so A2/A3/A4 keep exact ISO ratios while leaving room
for labels (which now wrap). Load Playfair Display + Cutive Mono via the
coollabs fonts API: Playfair Display for headings, Cutive Mono for the board.