diff --git a/olivesnews.theme b/olivesnews.theme
index 094a683..e772581 100755
--- a/olivesnews.theme
+++ b/olivesnews.theme
@@ -44,6 +44,20 @@ function olivesnews_preprocess_html(&$variables) {
       'href' => $variables['olivesnews_path'] . '/css/components/navigation/nav-primary-no-js.css?' . $query_string,
     ],
   ];
+// Use routeMatch — this is the modern, preferred way.
+  $node = \Drupal::routeMatch()->getParameter('node');
+
+  if ($node instanceof \Drupal\node\NodeInterface) {
+    // Add a simple node-ID class (most common format today).
+    $variables['attributes']['class'][] = 'node-' . $node->id();
+
+    // Optional: Add the classic Drupal 7-style class if you prefer / need it for legacy CSS.
+    // $variables['attributes']['class'][] = 'page-node-' . $node->id();
+
+    // Optional extras people often add at the same time:
+    // $variables['attributes']['class'][] = 'node-type-' . $node->bundle();
+    // $variables['attributes']['class'][] = 'node-' . $node->bundle();
+  }
 }
 
 
@@ -728,3 +742,4 @@ function olivesnews_preprocess_mirador(&$variables) {
   ]);
 }
  */
+