diff --git a/windows/PopupWindow.xaml b/windows/PopupWindow.xaml
index 8b40b1c..eb5460a 100644
--- a/windows/PopupWindow.xaml
+++ b/windows/PopupWindow.xaml
@@ -66,7 +66,16 @@
 
             <!-- Cards scroll area -->
             <ScrollViewer VerticalScrollBarVisibility="Auto">
-                <StackPanel x:Name="CardsPanel" Margin="0,4,0,4"/>
+                <StackPanel Margin="0,4,0,4">
+                    <Border x:Name="DebugBanner" Visibility="Collapsed"
+                            Background="{DynamicResource CardBrush}"
+                            BorderBrush="{DynamicResource BorderBrush}" BorderThickness="1"
+                            CornerRadius="6" Margin="12,4,12,4" Padding="12,8">
+                        <TextBlock x:Name="DebugBannerText" FontSize="10" FontFamily="Consolas"
+                                   Foreground="{DynamicResource SecondaryBrush}" TextWrapping="Wrap"/>
+                    </Border>
+                    <StackPanel x:Name="CardsPanel"/>
+                </StackPanel>
             </ScrollViewer>
         </DockPanel>