--- /dev/null
+{#
+/**
+ * @file
+ * Default theme implementation for an administrative page.
+ *
+ * Available variables:
+ * - system_compact_link: Themed link to toggle compact view.
+ * - containers: An list of administrative blocks keyed by position: left or
+ * right. Contains:
+ * - blocks: A list of blocks within a container.
+ *
+ * @see template_preprocess_admin_page()
+ *
+ * @ingroup themeable
+ */
+#}
+
+<div class="clearfix">
+ {{ system_compact_link }}
+ {% for container in containers %}
+ <div class="layout-column layout-column--half">
+ {% for block in container.blocks %}
+ {{ block }}
+ {% endfor %}
+ </div>
+ {% endfor %}
+</div>