diff --git a/app/components/Analytics.tsx b/app/components/Analytics.tsx
index f055248..882b600 100644
--- a/app/components/Analytics.tsx
+++ b/app/components/Analytics.tsx
@@ -1,14 +1,18 @@
 /**
- * Google Analytics 4 — set NEXT_PUBLIC_GA_ID in env to enable.
- * If unset (e.g. local dev), the component renders nothing.
+ * Google Analytics 4 — defaults to the TXLookup property (G-19ZRJ9T0CX).
+ * Override via NEXT_PUBLIC_GA_ID env (e.g. staging → different property).
+ * Set NEXT_PUBLIC_GA_ID="" explicitly to disable (e.g. local dev).
  *
  * Server component (no "use client") — emits the gtag bootstrap inline so
  * the GA script loads early in the document.
  */
 import Script from "next/script";
 
+const DEFAULT_GA_ID = "G-19ZRJ9T0CX"; // TXLookup property (hackathon-acf11 / acct 3000023)
+
 export function Analytics() {
-  const id = process.env.NEXT_PUBLIC_GA_ID;
+  const env = process.env.NEXT_PUBLIC_GA_ID;
+  const id = env === undefined ? DEFAULT_GA_ID : env;
   if (!id) return null;
   return (
     <>