Compiling CSS

👨‍💼 Even though most of our users are using modern browsers, there are some CSS features that not all of our users' browsers support. To make sure that our styles work for everyone, we need to compile our CSS using a tool called PostCSS.
Support for this tool is built-in to Remix. As soon as Remix finds configuration for PostCSS, it will automatically compile the CSS files you import for you as part of the build process.
And stick this config in there:
export default {
	plugins: {
		'tailwindcss/nesting': {},
		tailwindcss: {},
		autoprefixer: {},
	},
}
And stick this config in there:
import { type Config } from 'tailwindcss'
import defaultTheme from 'tailwindcss/defaultTheme.js'

export default {
	content: ['./app/**/*.{ts,tsx,jsx,js}'],
	theme: {
		extend: {
			fontFamily: {
				sans: [
					'Nunito Sans',
					'Nunito Sans Fallback',
					...defaultTheme.fontFamily.sans,
				],
			},
		},
	},
} satisfies Config
This is where we configure Tailwind, a CSS framework that we'll be using to style our app. Our PostCSS configuration includes the Tailwind plugin so we can use the Tailwind directives in our css files to get the Tailwind stylesheet on the page. 📜 You can read more about configuring Tailwind with PostCSS in the Tailwind docs.
Remix may not pick up on the new config files until you restart the dev server. Simply click "Stop App" and then "Start App" again to restart the dev server. That should work, but if it doesn't, stop the workshop app and restart it.
🐨 Now all that's left is for you to create a file and put in the Tailwind directives:
@tailwind base;
@tailwind components;
@tailwind utilities;
Then, using the knowledge you've gained from the previous steps, import this file and include a link tag for it in the file.
Finally, to test that this worked, you can style the "Hello World" to have a Tailwind class name like p-8 text-xl. If you see the text get bigger and more spaced, you're all set!