diff --git a/src/ClaudeDo.Ui/Views/Modals/DiffModalView.axaml b/src/ClaudeDo.Ui/Views/Modals/DiffModalView.axaml
index 0cdd4b0..d7945b7 100644
--- a/src/ClaudeDo.Ui/Views/Modals/DiffModalView.axaml
+++ b/src/ClaudeDo.Ui/Views/Modals/DiffModalView.axaml
@@ -60,9 +60,7 @@
 
       <!-- File sidebar -->
       <Border Grid.Column="0"
-              BorderBrush="{DynamicResource LineBrush}"
-              BorderThickness="0,0,1,0"
-              Background="{DynamicResource DeepBrush}">
+              Classes="sidebar-pane">
         <ListBox ItemsSource="{Binding Files}"
                  SelectedItem="{Binding SelectedFile, Mode=TwoWay}"
                  Background="Transparent"
@@ -110,18 +108,12 @@
                   <TextBlock Grid.Column="0"
                              Text="{Binding OldNo}"
                              Classes="diff-lineno"
-                             FontFamily="{DynamicResource MonoFont}"
-                             FontSize="{StaticResource FontSizeMono}"
-                             Foreground="{DynamicResource TextFaintBrush}"
                              HorizontalAlignment="Right"
                              Margin="0,0,8,0"/>
                   <!-- New line number -->
                   <TextBlock Grid.Column="1"
                              Text="{Binding NewNo}"
                              Classes="diff-lineno"
-                             FontFamily="{DynamicResource MonoFont}"
-                             FontSize="{StaticResource FontSizeMono}"
-                             Foreground="{DynamicResource TextFaintBrush}"
                              HorizontalAlignment="Right"
                              Margin="0,0,8,0"/>
                   <!-- Sign -->