Unify P0 visual system and Live Monitor filter hierarchy

App.xaml

@@ -189,33 +189,64 @@
             </Setter>
         </Style>
 
-        <!-- Compact P2 typography scale: restrained sizes for dense engineering workstations. -->
+        <!-- P0 workstation typography: five levels only for fast engineering scan paths. -->
+        <Style x:Key="WorkspaceTitle" TargetType="TextBlock">
+            <Setter Property="FontSize" Value="16"/>
+            <Setter Property="FontWeight" Value="SemiBold"/>
+            <Setter Property="Foreground" Value="{StaticResource Ink}"/>
+            <Setter Property="TextOptions.TextFormattingMode" Value="Display"/>
+        </Style>
+
+        <Style x:Key="WorkspaceSubtitle" TargetType="TextBlock">
+            <Setter Property="FontSize" Value="11"/>
+            <Setter Property="Foreground" Value="{StaticResource Muted}"/>
+            <Setter Property="TextOptions.TextFormattingMode" Value="Display"/>
+        </Style>
+
         <Style x:Key="SectionTitle" TargetType="TextBlock">
-            <Setter Property="FontSize" Value="15"/>
+            <Setter Property="FontSize" Value="13"/>
             <Setter Property="FontWeight" Value="SemiBold"/>
             <Setter Property="Foreground" Value="{StaticResource Ink}"/>
             <Setter Property="TextOptions.TextFormattingMode" Value="Display"/>
         </Style>
 
         <Style x:Key="BodyText" TargetType="TextBlock">
-            <Setter Property="FontSize" Value="12.2"/>
+            <Setter Property="FontSize" Value="12"/>
             <Setter Property="Foreground" Value="{StaticResource Ink}"/>
             <Setter Property="TextOptions.TextFormattingMode" Value="Display"/>
         </Style>
 
         <Style x:Key="Caption" TargetType="TextBlock">
             <Setter Property="Foreground" Value="{StaticResource Muted}"/>
-            <Setter Property="FontSize" Value="11.8"/>
+            <Setter Property="FontSize" Value="11"/>
             <Setter Property="TextOptions.TextFormattingMode" Value="Display"/>
         </Style>
 
         <Style x:Key="MicroLabel" TargetType="TextBlock">
             <Setter Property="Foreground" Value="{StaticResource Muted}"/>
-            <Setter Property="FontSize" Value="10.6"/>
+            <Setter Property="FontSize" Value="10"/>
             <Setter Property="FontWeight" Value="SemiBold"/>
             <Setter Property="TextOptions.TextFormattingMode" Value="Display"/>
         </Style>
 
+        <!-- Main-window workspace surfaces deliberately avoid card shadows. The data is the hierarchy. -->
+        <Style x:Key="WorkspaceCard" TargetType="Border">
+            <Setter Property="Background" Value="{StaticResource PremiumSurface}"/>
+            <Setter Property="CornerRadius" Value="12"/>
+            <Setter Property="Padding" Value="12"/>
+            <Setter Property="BorderBrush" Value="{StaticResource BorderSubtle}"/>
+            <Setter Property="BorderThickness" Value="1"/>
+            <Setter Property="Effect" Value="{x:Null}"/>
+        </Style>
+
+        <Style x:Key="SearchSurface" TargetType="Border">
+            <Setter Property="Height" Value="36"/>
+            <Setter Property="Background" Value="#F8FAFC"/>
+            <Setter Property="BorderBrush" Value="#D7E1EE"/>
+            <Setter Property="BorderThickness" Value="1"/>
+            <Setter Property="CornerRadius" Value="10"/>
+        </Style>
+
         <Style x:Key="PrimaryButton" TargetType="Button">
             <Setter Property="Foreground" Value="White"/>
             <Setter Property="Background" Value="{StaticResource AccentGradient}"/>
@@ -577,23 +608,31 @@
             <Setter Property="BorderThickness" Value="0"/>
             <Setter Property="Padding" Value="0"/>
             <Setter Property="FontWeight" Value="SemiBold"/>
-            <Setter Property="FontSize" Value="13"/>
+            <Setter Property="FontSize" Value="12.5"/>
             <Setter Property="Cursor" Value="Hand"/>
             <Setter Property="SnapsToDevicePixels" Value="True"/>
+            <Setter Property="FocusVisualStyle" Value="{x:Null}"/>
             <Setter Property="Template">
                 <Setter.Value>
                     <ControlTemplate TargetType="Button">
                         <Grid SnapsToDevicePixels="True">
-                            <!-- Transparent hit target only. The visible chrome is the animated sliding pill behind it. -->
-                            <Border Background="Transparent" CornerRadius="18" Margin="2"/>
-                            <ContentPresenter HorizontalAlignment="Center" VerticalAlignment="Center" RecognizesAccessKey="True" TextElement.Foreground="{TemplateBinding Foreground}"/>
+                            <Border Background="Transparent" CornerRadius="10" Margin="2"/>
+                            <Border x:Name="KeyboardFocusRing" Margin="2" CornerRadius="10"
+                                    BorderBrush="#7EA9EA" BorderThickness="1.5" Opacity="0"
+                                    IsHitTestVisible="False"/>
+                            <ContentPresenter HorizontalAlignment="Center" VerticalAlignment="Center"
+                                              RecognizesAccessKey="True"
+                                              TextElement.Foreground="{TemplateBinding Foreground}"/>
                         </Grid>
                         <ControlTemplate.Triggers>
                             <Trigger Property="IsMouseOver" Value="True">
-                                <Setter Property="FontSize" Value="13.45"/>
+                                <Setter Property="Foreground" Value="#344054"/>
                             </Trigger>
                             <Trigger Property="IsPressed" Value="True">
-                                <Setter Property="FontSize" Value="12.55"/>
+                                <Setter Property="Opacity" Value="0.82"/>
+                            </Trigger>
+                            <Trigger Property="IsKeyboardFocused" Value="True">
+                                <Setter TargetName="KeyboardFocusRing" Property="Opacity" Value="1"/>
                             </Trigger>
                             <Trigger Property="IsEnabled" Value="False">
                                 <Setter Property="Opacity" Value="0.45"/>
@@ -734,18 +773,19 @@
             <Setter Property="CanUserSortColumns" Value="True"/>
             <Setter Property="CanUserAddRows" Value="False"/>
             <Setter Property="CanUserDeleteRows" Value="False"/>
-            <Setter Property="RowHeight" Value="34"/>
+            <Setter Property="RowHeight" Value="32"/>
             <Setter Property="ColumnHeaderHeight" Value="34"/>
             <Setter Property="AlternatingRowBackground" Value="#F5F8FD"/>
-            <Setter Property="FontSize" Value="12.5"/>
+            <Setter Property="FontSize" Value="12.2"/>
             <Setter Property="VerticalContentAlignment" Value="Center"/>
         </Style>
 
         <Style TargetType="DataGridColumnHeader">
             <Setter Property="Background" Value="#F1F5F9"/>
             <Setter Property="Foreground" Value="#475467"/>
             <Setter Property="FontWeight" Value="SemiBold"/>
-            <Setter Property="Padding" Value="10,0"/>
+            <Setter Property="FontSize" Value="12"/>
+            <Setter Property="Padding" Value="9,0"/>
             <Setter Property="HorizontalContentAlignment" Value="Left"/>
             <Setter Property="VerticalContentAlignment" Value="Center"/>
             <Setter Property="BorderBrush" Value="{StaticResource Line}"/>

GridUxBehavior.cs

@@ -41,7 +41,9 @@ private sealed class GlobalRapidFilterState
         public required ICollectionView View { get; init; }
         public required DispatcherTimer RefreshTimer { get; init; }
         public Dictionary<string, string> Filters { get; } = new(StringComparer.OrdinalIgnoreCase);
+        public List<Grid> HeaderRoots { get; } = new();
         public string SearchQuery { get; set; } = string.Empty;
+        public bool FiltersExpanded { get; set; }
     }
 
     private static readonly ConditionalWeakTable<MainWindow, MainWindowState> MainWindows = new();
@@ -494,9 +496,8 @@ private static void InstallGlobalRapidFilters(MainWindow owner, DataGrid grid)
         headerStyle.Setters.Add(new Setter(Control.BackgroundProperty, new SolidColorBrush(Color.FromRgb(243, 246, 250))));
         headerStyle.Setters.Add(new Setter(Control.BorderBrushProperty, new SolidColorBrush(Color.FromRgb(220, 227, 236))));
         headerStyle.Setters.Add(new Setter(Control.BorderThicknessProperty, new Thickness(0, 0, 1, 1)));
-        headerStyle.Setters.Add(new Setter(FrameworkElement.HeightProperty, 74d));
         grid.ColumnHeaderStyle = headerStyle;
-        grid.ColumnHeaderHeight = 74;
+        grid.ColumnHeaderHeight = 34;
 
         foreach (var column in grid.Columns)
         {
@@ -515,6 +516,22 @@ internal static void SetGlobalRapidSearch(DataGrid grid, string? query)
         state.RefreshTimer.Start();
     }
 
+    internal static void SetGlobalRapidFiltersExpanded(DataGrid grid, bool expanded)
+    {
+        if (!GlobalGrids.TryGetValue(grid, out var state))
+            return;
+
+        state.FiltersExpanded = expanded;
+        foreach (var root in state.HeaderRoots)
+        {
+            if (root.RowDefinitions.Count < 2)
+                continue;
+            root.RowDefinitions[1].Height = expanded ? new GridLength(34) : new GridLength(0);
+        }
+        grid.ColumnHeaderHeight = expanded ? 68 : 34;
+        grid.UpdateLayout();
+    }
+
     private static void ApplyGlobalColumnStretch(DataGrid grid)
     {
         var layout = new Dictionary<string, (double Weight, double Minimum)>(StringComparer.OrdinalIgnoreCase)
@@ -553,16 +570,16 @@ private static FrameworkElement BuildRapidFilterHeader(GlobalRapidFilterState st
             Source = column,
             Mode = BindingMode.OneWay
         });
-        root.RowDefinitions.Add(new RowDefinition { Height = new GridLength(38) });
-        root.RowDefinitions.Add(new RowDefinition { Height = new GridLength(36) });
+        root.RowDefinitions.Add(new RowDefinition { Height = new GridLength(34) });
+        root.RowDefinitions.Add(new RowDefinition { Height = new GridLength(0) });
 
         var title = new TextBlock
         {
             Text = caption,
             Margin = new Thickness(10, 0, 8, 0),
             Foreground = new SolidColorBrush(Color.FromRgb(52, 64, 84)),
             FontWeight = FontWeights.SemiBold,
-            FontSize = 12.5,
+            FontSize = 12.0,
             VerticalAlignment = VerticalAlignment.Center,
             TextTrimming = TextTrimming.CharacterEllipsis
         };
@@ -572,6 +589,7 @@ private static FrameworkElement BuildRapidFilterHeader(GlobalRapidFilterState st
         var filterBox = CreateRapidFilterTextBox(state, caption);
         Grid.SetRow(filterBox, 1);
         root.Children.Add(filterBox);
+        state.HeaderRoots.Add(root);
 
         return root;
     }
@@ -581,9 +599,9 @@ private static TextBox CreateRapidFilterTextBox(GlobalRapidFilterState state, st
         var box = new TextBox
         {
             Tag = key,
-            Height = 36,
-            Padding = new Thickness(10, 0, 7, 0),
-            FontSize = 12.5,
+            Height = 34,
+            Padding = new Thickness(9, 0, 7, 0),
+            FontSize = 12.0,
             FontWeight = FontWeights.Normal,
             Foreground = new SolidColorBrush(Color.FromRgb(29, 41, 57)),
             CaretBrush = new SolidColorBrush(Color.FromRgb(37, 99, 235)),
@@ -667,7 +685,7 @@ private static ControlTemplate BuildRapidFilterTextBoxTemplate()
         watermark.SetValue(TextBlock.TextProperty, "Filter…");
         watermark.SetValue(FrameworkElement.MarginProperty, new Thickness(10, 0, 7, 0));
         watermark.SetValue(TextBlock.ForegroundProperty, new SolidColorBrush(Color.FromRgb(152, 162, 179)));
-        watermark.SetValue(TextBlock.FontSizeProperty, 12.5d);
+        watermark.SetValue(TextBlock.FontSizeProperty, 12.0d);
         watermark.SetValue(FrameworkElement.VerticalAlignmentProperty, VerticalAlignment.Center);
         watermark.SetValue(UIElement.IsHitTestVisibleProperty, false);
         watermark.SetValue(UIElement.VisibilityProperty, Visibility.Collapsed);

MainWindow.GlobalLiveSearch.cs

@@ -5,6 +5,8 @@ namespace ArIED61850Tester;
 
 public partial class MainWindow
 {
+    private bool _globalLiveFiltersExpanded;
+
     private void GlobalLiveSearch_TextChanged(object sender, TextChangedEventArgs e)
         => GridUxBehavior.SetGlobalRapidSearch(GlobalLiveGrid, GlobalLiveSearchBox?.Text);
 
@@ -16,4 +18,12 @@ private void GlobalLiveSearchClear_Click(object sender, RoutedEventArgs e)
         GlobalLiveSearchBox.Clear();
         GlobalLiveSearchBox.Focus();
     }
+
+    private void GlobalLiveFilters_Click(object sender, RoutedEventArgs e)
+    {
+        _globalLiveFiltersExpanded = !_globalLiveFiltersExpanded;
+        GridUxBehavior.SetGlobalRapidFiltersExpanded(GlobalLiveGrid, _globalLiveFiltersExpanded);
+        if (GlobalLiveFiltersLabel != null)
+            GlobalLiveFiltersLabel.Text = _globalLiveFiltersExpanded ? "Hide filters" : "Filters";
+    }
 }