Help getting Tailwind v4 to work with Next.js

[harrisonmolloy]

I am struggling to upgrade Tailwind v4 in one of my Next.js projects.

I started a new project closely following the docs here: https://tailwindcss.com/docs/installation/framework-guides/nextjs to compare configurations, but can't get that working either.

I have read through the upgrade guides and the Next.js docs, as well as what I can find in the issues/discussions,
also downgrading and using the upgrade tool, but no luck.

On a M1 mac using node 22.14.0 and npm 10.9.2

Any help or ideas would be greatly appreciated.

[wongjn]

Please consider providing a project that reproduces the unexpected behavior.