What version of Tailwind CSS are you using?

v4.0.3

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

• Next.js 15.1.6
• PostCSS 8

What version of Node.js are you using?

23.5.0

What browser are you using?

Chrome

What operating system are you using?

macOS

Reproduction URL

https://github.com/nicksergeant/tailwind-v4-dynamic-params/

Describe your issue

If you are disabling automatic detection with:

@import 'tailwindcss' source(none);

and then configuring a glob pattern like this:

@source './**/*.{js,ts,jsx,tsx,mdx}';

Source files in directories such as [...slug] will not be picked up: https://github.com/nicksergeant/tailwind-v4-dynamic-params/blob/main/app/%5B...slug%5D/page.tsx

I'm not sure if this is a bug per se, and I have found this workaround:

@source './**/*.{js,ts,jsx,tsx,mdx}';
@source './[[]**[]]/*.{js,ts,jsx,tsx,mdx}';

Example page showing missing style: https://github.com/nicksergeant/tailwind-v4-dynamic-params/blob/main/app/%5B...slug%5D/page.tsx#L4

But I was surprised that ./**/* was not working to pick those up.