Ticket #40313: 40313.diff

src/wp-includes/css/admin-bar.css

@@ -624 +624 @@
         -moz-osx-font-smoothing: grayscale;
 }
 
+/* The admin bar search field needs to reset many styles that might be inherited from the active Theme CSS. See ticket #40313. */
 #wpadminbar > #wp-toolbar > #wp-admin-bar-top-secondary > #wp-admin-bar-search #adminbarsearch input.adminbar-input {
+        display: inline-block;
+        float: none;
         position: relative;
         z-index: 30;
         font-size: 13px;
         font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
         line-height: 24px;
+        text-indent: 0;
         height: 24px;
         width: 24px;
         max-width: none;