Search bar pinned again, now flush under the header at every width (sticky offset follows the header's real height); v2.25.2

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

src/App.css

@@ -34,7 +34,10 @@
 .site-search-bar {
   background: #13120d;
   border-bottom: 1px solid #28241a;
-  /* Scrolls away with the page; only the header stays pinned */
+  position: sticky;
+  /* --site-header-h is set from the header's real height (see SiteHeader), so the bar sits flush below it */
+  top: var(--site-header-h, 72px);
+  z-index: 99;
 }
 .site-search-bar-inner {
   max-width: 900px;