Modified files
templates/allauth/layouts/base.html
                    --- 
+++ 
@@ -1,9 +1,11 @@
 {% extends "base.html" %}
 {% block base_content %}
-<div>
-  {% block content %}
+<main class="max-w-xl mx-auto">
+  <div class="text-center bg-gray-800 text-white rounded-lg mt-10 p-6 lg:p-16">
+    {% block content %}
-  {% endblock content %}
-</div>
+    {% endblock content %}
+  </div>
+</main>
 {% endblock base_content %}