Using route group in NextJS 13 stops tailwind from working

In my NextJS 13 app, Tailwind classes stop being applied when I move page.tsx/layout.tsx from the root of my app directory into a (main) directory (also in the root of my app directory). I imagine there is some config somewhere that is becoming invalidated when I use the route group, but I'm not sure what it is.


This is my tailwind.config file:
import type { Config } from 'tailwindcss'

const config: Config = {
content: [
'./src/pages/**/*.{js,ts,jsx,tsx,mdx}',
'./src/components/**/*.{js,ts,jsx,tsx,mdx}',
'./src/app/**/*.{js,ts,jsx,tsx,mdx}',
],
theme: {
extend: {
backgroundImage: {
'gradient-radial': 'radial-gradient(var(--tw-gradient-stops))',
'gradient-conic':
'conic-gradient(from 180deg at 50% 50%, var(--tw-gradient-stops))',
},
},
},
plugins: [],
}
export default config