diff --git a/src/app/globals.css b/src/app/globals.css
index 15a712a..4d94e4c 100644
--- a/src/app/globals.css
+++ b/src/app/globals.css
@@ -132,5 +132,4 @@ dl.facts dd { margin: 0; overflow-wrap: anywhere; }
 
 /* CrawlProof ad unit: no box until ad.js starts filling it, so an unsold or blocked slot leaves no hole. */
 .ad-unit { display: flex; flex-direction: column; align-items: center; height: 0; overflow: hidden; }
-.ad-unit[data-cp-filled] { height: auto; min-height: 106px; margin: 1.5rem 0; overflow: visible; }
-.ad-unit[data-cp-filled][data-format="banner_300x250"] { min-height: 266px; }
+.ad-unit[data-cp-filled] { height: auto; min-height: 40px; margin: 10px 0; overflow: visible; align-items: stretch; }
diff --git a/src/components/ad-unit.tsx b/src/components/ad-unit.tsx
index ccbd88e..6e4f86f 100644
--- a/src/components/ad-unit.tsx
+++ b/src/components/ad-unit.tsx
@@ -1,13 +1,11 @@
 "use client";
 
 import { useEffect, useRef } from "react";
+import { usePathname } from "next/navigation";
 
 /** CrawlProof ad slot for datamart.help. Manage it at https://crawlproof.com/ads/slots */
 const AD_SLOT = "04392e64-733a-48dd-b17b-c4dc9eb3a399";
 
-/** 728px banner plus the .wrap gutters; anything narrower gets the 300x250 rectangle. */
-const LEADERBOARD_QUERY = "(min-width: 760px)";
-
 declare global {
   interface Window {
     crawlproofAds?: { scan: () => void };
@@ -15,19 +13,26 @@ declare global {
 }
 
 /**
- * One CrawlProof unit at the top of the content. The aside is server-rendered without
- * data-slot, so ad.js's own DOMContentLoaded pass skips it; the format is picked
- * from the real viewport on mount, then we ask ad.js to scan (retrying briefly
+ * One low-profile CrawlProof text-link unit at the top of the content, on every page
+ * but the homepage. The aside is server-rendered without data-slot, so ad.js's own
+ * DOMContentLoaded pass skips it; on mount we set text_link + the slot and ask ad.js to scan (retrying briefly
  * until it has loaded, and giving up so an ad blocker leaves no timer running).
  * It stays zero-height until ad.js marks it data-cp-filled.
  */
 export function AdUnit() {
+  const pathname = usePathname() ?? "/";
+  if (pathname === "/") return null;
+  // Keyed by path so each client-side navigation gets a fresh unit.
+  return <AdSlot key={pathname} />;
+}
+
+function AdSlot() {
   const ref = useRef<HTMLElement>(null);
 
   useEffect(() => {
     const el = ref.current;
     if (!el) return;
-    el.dataset.format = window.matchMedia(LEADERBOARD_QUERY).matches ? "banner_728x90" : "banner_300x250";
+    el.dataset.format = "text_link";
     el.dataset.slot = AD_SLOT;
 
     let tries = 0;