Fluent HighVisibility focus adorner

src/Avalonia.Themes.Fluent/FocusAdorner.xaml

@@ -1,10 +1,34 @@
-<Style xmlns="https://github.com/avaloniaui" Selector=":is(Control)">
-  <Setter Property="FocusAdorner">
-    <FocusAdornerTemplate>
-      <Rectangle Stroke="Black"
-                 StrokeThickness="1"
-                 StrokeDashArray="1,2"
-                 Margin="1"/>
-    </FocusAdornerTemplate>
-  </Setter>
-</Style>
+<Styles xmlns="https://github.com/avaloniaui"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
+  <Styles.Resources>
+    <Thickness x:Key="SystemControlFocusVisualMargin">0</Thickness>
+    <Thickness x:Key="SystemControlFocusVisualPrimaryThickness">2</Thickness>
+    <Thickness x:Key="SystemControlFocusVisualSecondaryThickness">1</Thickness>
+  </Styles.Resources>
+
+  <!--  HighVisibility FocusAdorner  -->
+  <Style Selector=":is(Control)">
+    <Setter Property="FocusAdorner">
+      <FocusAdornerTemplate>
+        <Border BorderThickness="{StaticResource SystemControlFocusVisualPrimaryThickness}"
+                BorderBrush="{DynamicResource SystemControlFocusVisualPrimaryBrush}"
+                Margin="{StaticResource SystemControlFocusVisualMargin}">
+          <Border BorderThickness="{StaticResource SystemControlFocusVisualSecondaryThickness}"
+                  BorderBrush="{DynamicResource SystemControlFocusVisualSecondaryBrush}" />
+        </Border>
+      </FocusAdornerTemplate>
+    </Setter>
+  </Style>
+
+  <!--  DottedLine FocusAdorner  -->
+  <Style Selector=":is(Control).DottedLineFocusAdorner">
+    <Setter Property="FocusAdorner">
+      <FocusAdornerTemplate>
+        <Rectangle Stroke="{StaticResource SystemControlFocusVisualPrimaryBrush}"
+                   StrokeThickness="1"
+                   StrokeDashArray="1,2"
+                   Margin="1" />
+      </FocusAdornerTemplate>
+    </Setter>
+  </Style>
+</Styles>