diff --git a/core/modules/navigation/css/components/admin-toolbar.css b/core/modules/navigation/css/components/admin-toolbar.css
index b0404be1b3e13cba5faf33d263fdc741b376f16a..331ce4a98db80e160ef2313eef5ae2ce2423c99d 100644
--- a/core/modules/navigation/css/components/admin-toolbar.css
+++ b/core/modules/navigation/css/components/admin-toolbar.css
@@ -304,7 +304,7 @@ body {
 }
 @media (min-width: 64rem) {
   .admin-toolbar__footer {
-    --admin-toolbar-z-index-footer: 1;
+    --admin-toolbar-z-index-footer: -1;
 
     position: sticky;
     bottom: 0;
diff --git a/core/modules/navigation/css/components/admin-toolbar.pcss.css b/core/modules/navigation/css/components/admin-toolbar.pcss.css
index 71eae9586bc53c566e531418f8734f61b882d5df..edb73946b7bdcedb33f48eb620ef1c31a4204159 100644
--- a/core/modules/navigation/css/components/admin-toolbar.pcss.css
+++ b/core/modules/navigation/css/components/admin-toolbar.pcss.css
@@ -316,7 +316,7 @@ body {
   border-inline-end: 1px solid var(--admin-toolbar-color-gray-100);
 
   @media (--admin-toolbar-desktop) {
-    --admin-toolbar-z-index-footer: 1;
+    --admin-toolbar-z-index-footer: -1;
 
     position: sticky;
     bottom: 0;