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Quentin Gliech
8e65bf198e
Tailwind 4 ships its own Vite plugin and no longer needs PostCSS plumbing. Drop postcss/autoprefixer/postcss-import/postcss-nesting and the .postcssrc.json, wire @tailwindcss/vite into vite.config.ts, replace the @tailwind directives with @import "tailwindcss", and convert the JS tailwind.config.cjs theme into a CSS @theme block in shared.css. An @source directive points back at the SSR templates so the Jinja-rendered HTML in templates/ still gets scanned for utility classes. The third-party CSS (compound design tokens, compound-web, fontsource) moves into a new vendor.css entrypoint, loaded ahead of shared.css from main.tsx, storybook, and base.html. Tailwind v4's @import bundler silently drops the nested `@import url(...) layer(cpd-base) screen` statements inside the compound-design-tokens.css barrel, so we have to keep those imports out of any file that contains Tailwind directives and let Vite's normal CSS pipeline resolve them instead.