feat(code): upgrade Tailwind CSS v3 to v4#1540
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adamleithp merged 1 commit intomainfrom Apr 8, 2026
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Upgrade Tailwind CSS from v3 to v4 using the @tailwindcss/vite plugin instead of PostCSS. Uses @config to preserve the existing tailwind.config.js with radix-themes-tw preset, avoiding a full theme migration. Key changes: - Replace PostCSS plugin with @tailwindcss/vite in renderer and Storybook - Replace @tailwind directives with @import "tailwindcss" + @config - Import Radix Themes CSS via @layer for proper cascade ordering - Move Radix CSS import from main.tsx to globals.css - Remove autoprefixer (built into v4) - Delete postcss.config.js (no longer needed) Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
charlesvien
approved these changes
Apr 8, 2026
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Summary
@tailwindcss/viteplugin)@configto preserve the existingtailwind.config.jswithradix-themes-twpreset — no theme migration needed@layer radixwith explicit layer ordering (theme < base < radix < components < utilities) so Radix component styles override Tailwind's preflight reset while Tailwind utilities can still override Radixautoprefixerandpostcss.config.js(both built into v4)Test plan
rt-r-*classes)text-gray-11,bg-accent-4, etc.) apply correctly🤖 Generated with Claude Code