What version of Tailwind CSS are you using?

v.4.1.18

What build tool (or framework if it abstracts the build tool) are you using?

Astro 5.17.2

What version of Node.js are you using?

v22.22.0

What browser are you using?

N/A

What operating system are you using?

macOS

Reproduction URL

https://github.com/4ndv/astro-tailwind-issue-repro

Describe your issue

After upgrading @tailwindcss/vite to 4.1.18, import aliases breaks inside of astro's <style> blocks:

<style>
  @reference '@styles/global.css';

  header {
    @apply py-8;
  }
</style>

22:50:54 [ERROR] Can't resolve '@styles/global.css' in '/Users/lynx/projects/astro-tailwind-imports/src/pages'
  Stack trace:
    at /Users/lynx/projects/astro-tailwind-imports/src/pages/index.astro?astro&type=style&index=0&lang.css
    [...] See full stack trace in the browser, or rerun with --verbose.

The most likely cause is #18970, astro v5 uses version of Vite where environment API is present, but internally astro still overrides config.createResolver