diff --git a/XSDVisualiser.Desktop/MainWindow.axaml b/XSDVisualiser.Desktop/MainWindow.axaml
index 5f0fcce..2101879 100644
--- a/XSDVisualiser.Desktop/MainWindow.axaml
+++ b/XSDVisualiser.Desktop/MainWindow.axaml
@@ -20,60 +20,7 @@
         <!-- Body: left tree | splitter | right details -->
         <Grid Grid.Row="1" ColumnDefinitions="2*,Auto,*" RowDefinitions="*">
             <!-- Left: Tree -->
-            <Border Background="{DynamicResource PanelBackgroundBrush}"
-                    BorderBrush="{DynamicResource PanelBorderBrush}"
-                    BorderThickness="1" CornerRadius="6" Margin="0,8,8,0">
-                <ScrollViewer>
-                    <TreeView x:Name="SchemaTree" ItemsSource="{Binding VisibleRootElements}">
-                        <TreeView.DataTemplates>
-                            <TreeDataTemplate DataType="{x:Type m:SchemaNode}" ItemsSource="{Binding Children}">
-                                <StackPanel>
-                                    <!-- Connector line from parent to this node (hidden for roots where ContentModel is null) -->
-                                    <Grid Margin="0,8,8,2" IsVisible="{Binding ContentModel, Converter={x:Static ObjectConverters.IsNotNull}}"
-                                          ColumnDefinitions="16,*">
-                                        <!-- leading small elbow -->
-                                        <Rectangle Grid.Column="0" Width="16" Height="2" Fill="{DynamicResource SeparatorBrush}" VerticalAlignment="Center"/>
-                                        <Grid Grid.Column="1">
-                                            <Rectangle Height="2" Fill="{DynamicResource SeparatorBrush}" VerticalAlignment="Center"/>
-                                            <TextBlock Text="{Binding Cardinality, Converter={StaticResource CardinalityToLabel}}"
-                                                       Background="{DynamicResource BadgeBackgroundBrush}" Padding="6,0"
-                                                       Foreground="{DynamicResource SubtleTextBrush}"
-                                                       HorizontalAlignment="Center"/>
-                                        </Grid>
-                                    </Grid>
-
-                                    <!-- Node content -->
-                                    <Border CornerRadius="4"
-                                            BorderBrush="{Binding Cardinality, Converter={StaticResource OptionalToBrush}}"
-                                            BorderThickness="{Binding Cardinality, Converter={StaticResource OptionalToThickness}}"
-                                            Padding="8" Margin="0,0,8,6" Background="{DynamicResource PanelBackgroundBrush}">
-                                        <StackPanel Orientation="Vertical" Spacing="2">
-                                            <!-- Name on its own line, prominent -->
-                                            <TextBlock Text="{Binding Name}" FontWeight="SemiBold"/>
-
-                                            <!-- Path/Namespace on its own line -->
-                                            <TextBlock Text="{Binding Namespace, StringFormat=Namespace: {0}}"
-                                                       Foreground="{DynamicResource SubtleTextBrush}"/>
-
-                                            <!-- Type info on its own line (TypeName with fallback to BuiltInType) -->
-                                            <StackPanel Orientation="Horizontal" Spacing="6">
-                                                <TextBlock Text="Type:" FontWeight="Medium"/>
-                                                <TextBlock Text="{Binding TypeName}"/>
-                                                <TextBlock Text="{Binding BuiltInType, StringFormat=({0})}"
-                                                           Foreground="{DynamicResource MutedTextBrush}"/>
-                                            </StackPanel>
-
-                                            <!-- Optional: show content model as a subtle hint -->
-                                            <TextBlock Text="{Binding ContentModel, StringFormat=Model: {0}}"
-                                                       Foreground="{DynamicResource SubtleTextBrush}" FontWeight="SemiBold"/>
-                                        </StackPanel>
-                                    </Border>
-                                </StackPanel>
-                            </TreeDataTemplate>
-                        </TreeView.DataTemplates>
-                    </TreeView>
-                </ScrollViewer>
-            </Border>
+            <views:LeftTreeView Grid.Column="0" />
 
             <!-- Splitter -->
             <GridSplitter Grid.Column="1" Width="6" Margin="4,8" Background="{DynamicResource PanelBorderBrush}" ShowsPreview="True"/>
@@ -83,7 +30,7 @@
                     BorderBrush="{DynamicResource PanelBorderBrush}"
                     BorderThickness="1" CornerRadius="6" Margin="8,8,0,0">
                 <ScrollViewer>
-                    <ContentControl Content="{Binding #SchemaTree.SelectedItem}">
+                    <ContentControl Content="{Binding SelectedNode}">
                         <ContentControl.DataTemplates>
                             <DataTemplate DataType="{x:Type m:SchemaNode}">
                                 <StackPanel Margin="12" Spacing="12">