diff --git a/.env.example b/.env.example
index c539b6a..dded42e 100644
--- a/.env.example
+++ b/.env.example
@@ -8,5 +8,5 @@ NEXT_PUBLIC_APP_URL=https://btc.eh-aye.net
 # API endpoints (if needed)
 # NEXT_PUBLIC_API_URL=https://api.eh-aye.net
 
-# Analytics (optional)
-# NEXT_PUBLIC_GA_ID=G-XXXXXXXXXX
\ No newline at end of file
+# Google Analytics (optional)
+# NEXT_PUBLIC_GA_MEASUREMENT_ID=G-XXXXXXXXXX
\ No newline at end of file
diff --git a/src/pages/_document.tsx b/src/pages/_document.tsx
index 17a4208..46b75d2 100644
--- a/src/pages/_document.tsx
+++ b/src/pages/_document.tsx
@@ -1,9 +1,31 @@
 import { Head, Html, Main, NextScript } from "next/document";
 
 export default function Document() {
+  const gaMeasurementId = process.env.NEXT_PUBLIC_GA_MEASUREMENT_ID;
+
   return (
     <Html lang="en" className="dark" style={{ colorScheme: "dark" }}>
       <Head>
+        {/* Google Analytics - Only included if environment variable is set */}
+        {gaMeasurementId && (
+          <>
+            <script
+              async
+              src={`https://www.googletagmanager.com/gtag/js?id=${gaMeasurementId}`}
+            />
+            <script
+              dangerouslySetInnerHTML={{
+                __html: `
+                  window.dataLayer = window.dataLayer || [];
+                  function gtag(){dataLayer.push(arguments);}
+                  gtag('js', new Date());
+                  gtag('config', '${gaMeasurementId}');
+                `,
+              }}
+            />
+          </>
+        )}
+
         {/* Favicons */}
         <link rel="icon" type="image/x-icon" href="/icons/favicon.ico" />
         <link
