diff --git a/src/pages/demo/playground/theme/index.vue b/src/pages/demo/playground/theme/index.vue
index 838c64cc..e1e0a6df 100644
--- a/src/pages/demo/playground/theme/index.vue
+++ b/src/pages/demo/playground/theme/index.vue
@@ -1,6 +1,6 @@
 <template>
-  <d2-container>
-    new page
+  <d2-container class="page">
+    page
   </d2-container>
 </template>
 <script>
@@ -12,4 +12,9 @@ export default {
 </script>
 
 <style lang="scss" scoped>
+.page {
+  // Your page style here
+  // Do not use empty rulesets
+  // If empty, delete it
+}
 </style>
\ No newline at end of file