MD Settings: Expanding cards should not overlap header

chrome/browser/resources/settings/settings_ui/settings_ui.html

Index: chrome/browser/resources/settings/settings_ui/settings_ui.html
diff --git a/chrome/browser/resources/settings/settings_ui/settings_ui.html b/chrome/browser/resources/settings/settings_ui/settings_ui.html
index 892ebe1003962d2b80b5d233a83b1894854c633b..ff21c4b9102819a0afe6bdd8d08abb8cbcad21ea 100644
--- a/chrome/browser/resources/settings/settings_ui/settings_ui.html
+++ b/chrome/browser/resources/settings/settings_ui/settings_ui.html
@@ -94,12 +94,21 @@
         --paper-input-max-width: 200px;
       }
 
+      paper-header-panel {
+        --paper-header-panel-shadow: {
+          z-index: 1;
+        };
+        --paper-header-panel-standard-container: {
+          z-index: 0;
+        };
+      }
+
       paper-toolbar {
         --paper-toolbar-height: 56px;
         --paper-toolbar-sm-height: 56px;
         --paper-toolbar-content: {
           font-size: 123.08%; /* go to 16px from 13px */
-        }
+        };
         --paper-toolbar: {
           background-color: var(--settings-title-bar-background-color);
         };