diff --git a/artdag_common/templates/_base.html b/artdag_common/templates/_base.html
index 77e5ef8..4bdc3c6 100644
--- a/artdag_common/templates/_base.html
+++ b/artdag_common/templates/_base.html
@@ -49,6 +49,7 @@
     </script>
 </head>
 <body class="bg-stone-50 text-stone-900 min-h-screen">
+    <div class="max-w-screen-2xl mx-auto py-1 px-1">
     {% block header %}
     {# Coop-style header: sky banner with title, nav-tree, auth-menu, cart-mini #}
     <div class="w-full">
@@ -88,6 +89,7 @@
     </main>
 
     {% block footer %}{% endblock %}
+    </div>
     {% block scripts %}{% endblock %}
 </body>
 </html>
