Try to 100% heignt template

rumine/templates/404.html

@@ -4,7 +4,7 @@
 
 {% block body_class %}template-404{% endblock %}
 
-{% block content %}
+{% block content_full %}
 <style>
     /*======================
     404 page

rumine/templates/base.html

@@ -73,6 +73,8 @@
             </header>
             
             <div class="content">
+                {% block content_full %}
+                {% endblock %}
                 <section class="container">
                     {% block content %}
                     {% endblock %}