For who use Astro / Tailwind v4

[xferqr]

1. Create tailwind.config.js file:

/** @type {import('tailwindcss').Config} */
export default {
  content: [
    './src/**/*.{astro,html,js,jsx,md,mdx,svelte,ts,tsx,vue}',
    './node_modules/stdf/dist/**/*.{js,svelte}'
  ],
  theme: {
    extend: {},
  },
  plugins: [],
}

2. Insert to app.css file:

@config "../../tailwind.config.js";