docs: fix banner double-offset by using position: fixed

jdx · claude · jdx · commit 2c70cbcd24cf · 2026-04-23T13:28:47.000-05:00
Banner was using position: relative which put it in document flow
*and* VitePress applies --vp-layout-top-height offset, causing content
to be pushed down twice. Switch to position: fixed so the banner is
out of flow and --vp-layout-top-height alone handles the content
offset (which is what VitePress's layout-top slot assumes).

Co-Authored-By: Claude Opus 4.7 (1M context) &lt;noreply@anthropic.com&gt;
diff --git a/docs/.vitepress/theme/banner.css b/docs/.vitepress/theme/banner.css
@@ -1,5 +1,8 @@
 .jdx-banner {
-  position: relative;
+  position: fixed;
+  top: 0;
+  left: 0;
+  right: 0;
   z-index: 60;
   display: flex;
   gap: 0.75rem;
