diff --git a/website/src/styles/main.css b/website/src/styles/main.css
index d8688fa..7824c6a 100644
--- a/website/src/styles/main.css
+++ b/website/src/styles/main.css
@@ -1,6 +1,9 @@
 @import "tailwindcss";
 @import "./asciidoctor-scoped.css";
 
+/* Configure Tailwind v4 dark mode to use class strategy */
+@variant dark (.dark &);
+
 :root {
   --color-primary: #2563eb;
   --color-primary-dark: #1d4ed8;
diff --git a/website/tailwind.config.js b/website/tailwind.config.js
deleted file mode 100644
index 85055bf..0000000
--- a/website/tailwind.config.js
+++ /dev/null
@@ -1,12 +0,0 @@
-/** @type {import('tailwindcss').Config} */
-export default {
-  content: [
-    "./index.html",
-    "./src/**/*.{js,ts,jsx,tsx}",
-  ],
-  darkMode: 'class', // Enable class-based dark mode
-  theme: {
-    extend: {},
-  },
-  plugins: [],
-}