templates: improve 404.html

circle/templates/404.html

@@ -6,5 +6,14 @@
 {% block page_title %}{% trans "Page not found" %}{% endblock page_title %}
 {% block page_title %}{% trans "Page not found" %}{% endblock page_title %}
 
 
 {% block content %}
 {% block content %}
-<p>{% trans "This page does not exist." %}</p>
+<div class="alert alert-warning" style="font-size: 22px; margin-top: 2em;">
+  <div class="row">
+    <div class="col-md-2" style="text-align: center;">
+      HTTP 404
+    </div>
+    <div class="col-md-10" style="text-align: center;">
+      {% trans "This page does not exist." %}
+    </div>
+  </div>
+</div>
 {% endblock content %}
 {% endblock content %}