Install @tailwindcss/typography plugin

tailwind.config.cjs

@@ -0,0 +1,14 @@
+const defaultTheme = require("tailwindcss/defaultTheme");
+
+module.exports = {
+  content: ["./src/**/*.{astro,html,js,jsx,md,svelte,ts,tsx,vue}"],
+  theme: {
+    extend: {
+      fontFamily: {
+        sans: ['"IBM Plex Sans"', ...defaultTheme.fontFamily.sans],
+      },
+    },
+  },
+  plugins: [require("@tailwindcss/typography")],
+  darkMode: "class",
+};