diff --git a/core/includes/theme.maintenance.inc b/core/includes/theme.maintenance.inc
index 8a19a49..b8ec989 100644
--- a/core/includes/theme.maintenance.inc
+++ b/core/includes/theme.maintenance.inc
@@ -145,17 +145,17 @@ function theme_task_list($variables) {
 /**
  * Returns HTML for a results report of an operation run by authorize.php.
  *
- * @param $variables
+ * @param array $variables
  *   An associative array containing:
  *   - messages: An array of result messages.
  *
  * @ingroup themeable
  */
-function theme_authorize_report($variables) {
+function theme_authorize_report(array $variables) {
   $messages = $variables['messages'];
   $output = '';
   if (!empty($messages)) {
-    $output .= '<div id="authorize-results">';
+    $output .= '<div class="authorize-results">';
     foreach ($messages as $heading => $logs) {
       $items = array();
       foreach ($logs as $number => $log_message) {
@@ -184,21 +184,21 @@ function theme_authorize_report($variables) {
 /**
  * Returns HTML for a single log message from the authorize.php batch operation.
  *
- * @param $variables
+ * @param array $variables
  *   An associative array containing:
  *   - message: The log message.
  *   - success: A boolean indicating failure or success.
  *
  * @ingroup themeable
  */
-function theme_authorize_message($variables) {
+function theme_authorize_message(array $variables) {
   $message = $variables['message'];
   $success = $variables['success'];
   if ($success) {
-    $item = array('data' => $message, 'class' => array('success'));
+    $item = array('data' => $message, 'class' => array('authorize-results__success'));
   }
   else {
-    $item = array('data' => '<strong>' . $message . '</strong>', 'class' => array('failure'));
+    $item = array('data' => $message, 'class' => array('authorize-results__failure'));
   }
   return $item;
 }
diff --git a/core/modules/system/css/system.maintenance.css b/core/modules/system/css/system.maintenance.css
index 9fd9f38..b6456c6 100644
--- a/core/modules/system/css/system.maintenance.css
+++ b/core/modules/system/css/system.maintenance.css
@@ -43,3 +43,10 @@
 #edit-connection-settings-change-connection-type {
   margin: 2.6em 0.5em 0 1em;
 }
+
+/**
+ * Theme maintenance styles
+ */
+.authorize-results__failure {
+  font-weight: bold;
+}