Tailwind CSS

npm install tailwindcss
npx tailwindcss init

mkdir -p ./src/css/
mkdir -p ./assets/css/

touch ./src/css/tailwind.css

Add this to your src/css/tailwind.css

@tailwind base;
@tailwind components;
@tailwind utilities;

npx tailwindcss build ./src/css/tailwind.css -o ./assets/css/tailwind.css

Add to _includes/layouts/default.html after <base ...>

<link rel="stylesheet" href="assets/css/tailwind.css">