<!-- Please provide all of the information requested below. We're a small team and without all of this information it's not possible for us to help and your bug report will be closed. --> **What version of Tailwind CSS are you using?** For example: v4.beta2 **What build tool (or framework if it abstracts the build tool) are you using?** TailwindCSS playground **What version of Node.js are you using?** TailwindCSS playground **What browser are you using?** Chrome **What operating system are you using?** macOS **Reproduction URL** https://play.tailwindcss.com/NS2lqkVlqT If I change `group` to `x:group`, the output does not change on hover, so it is likely that the generated selector ignores `prefix` **Describe your issue** <img width="965" alt="image" src="https://github.com/user-attachments/assets/0af76e1c-ae2d-4bf4-8800-50294da58b2d">