diff --git a/src/MessageBox.Avalonia/Views/MsBoxCustomWindow.xaml b/src/MessageBox.Avalonia/Views/MsBoxCustomWindow.xaml
index 8603489..2137824 100644
--- a/src/MessageBox.Avalonia/Views/MsBoxCustomWindow.xaml
+++ b/src/MessageBox.Avalonia/Views/MsBoxCustomWindow.xaml
@@ -66,20 +66,17 @@
         <Image Grid.Row="1" Grid.Column="1" MaxHeight="50" MaxWidth="50" VerticalAlignment="Top"
                IsVisible="{Binding Icon}"
                Source="{Binding ImagePath}" />
-        <Grid Grid.Row="1" Grid.Column="3">
-            <Grid.RowDefinitions>
-                <RowDefinition Height="Auto" />
-                <RowDefinition Height="15" />
-                <RowDefinition Height="*" />
-            </Grid.RowDefinitions>
+        <Grid Grid.Row="1" Grid.Column="3" RowDefinitions="Auto,15,*">
             <!--Bold text-->
             <TextBox Grid.Row="0" Classes="header" FontFamily="{Binding FontFamily}" Text="{Binding ContentHeader}"
                      IsVisible="{Binding HasHeader}" />
             <!--Content text-->
-            <TextBox Grid.Row="2" FontFamily="{Binding FontFamily}" Text="{Binding ContentMessage}" />
+            <TextBox Grid.Row="2" Classes="contentMessage" FontFamily="{Binding FontFamily}"
+                     Text="{Binding ContentMessage}" />
         </Grid>
         <!--Buttons-->
-        <ItemsPresenter Items="{Binding ButtonDefinitions}" Grid.Row="3" Grid.Column="1" Grid.ColumnSpan="3"
+        <ItemsPresenter Classes="buttons-item-presenter" Items="{Binding ButtonDefinitions}" Grid.Row="3"
+                        Grid.Column="1" Grid.ColumnSpan="3"
                         HorizontalAlignment="Right">
             <ItemsPresenter.ItemsPanel>
                 <ItemsPanelTemplate>
@@ -91,6 +88,7 @@
             <ItemsPresenter.ItemTemplate>
                 <DataTemplate>
                     <Button Name="Btn"
+                            Classes="button"
                             Tag="{Binding TypeName}"
                             Command="{Binding DataContext.ButtonClick, RelativeSource={RelativeSource AncestorType=Window, AncestorLevel=1}}"
                             CommandParameter="{Binding #Btn.Content}"
diff --git a/src/MessageBox.Avalonia/Views/MsBoxHyperlinkWindow.xaml b/src/MessageBox.Avalonia/Views/MsBoxHyperlinkWindow.xaml
index eb089fa..fea1aec 100644
--- a/src/MessageBox.Avalonia/Views/MsBoxHyperlinkWindow.xaml
+++ b/src/MessageBox.Avalonia/Views/MsBoxHyperlinkWindow.xaml
@@ -51,31 +51,12 @@
         </Style>
 
     </Window.Styles>
-    <Grid Classes="MsBoxHyperlinkContainer">
-        <Grid.ColumnDefinitions>
-            <ColumnDefinition Width="15" />
-            <ColumnDefinition Width="Auto" />
-            <ColumnDefinition Width="15" />
-            <ColumnDefinition Width="*" />
-            <ColumnDefinition Width="15" />
-        </Grid.ColumnDefinitions>
-        <Grid.RowDefinitions>
-            <RowDefinition Height="15" />
-            <RowDefinition Height="*" />
-            <RowDefinition Height="15" />
-            <RowDefinition Height="Auto" />
-            <RowDefinition Height="15" />
-        </Grid.RowDefinitions>
+    <Grid Classes="MsBoxHyperlinkContainer" RowDefinitions="15,*,15,Auto,15" ColumnDefinitions="15,Auto,15,*,15">
         <!--Icon-->
-        <Image Grid.Row="1" Grid.Column="1" MaxHeight="50" MaxWidth="50" VerticalAlignment="Top"
+        <Image Classes="image" Grid.Row="1" Grid.Column="1" MaxHeight="50" MaxWidth="50" VerticalAlignment="Top"
                IsVisible="{Binding Icon}"
                Source="{Binding ImagePath}" />
-        <Grid Grid.Row="1" Grid.Column="3">
-            <Grid.RowDefinitions>
-                <RowDefinition Height="Auto" />
-                <RowDefinition Height="15" />
-                <RowDefinition Height="*" />
-            </Grid.RowDefinitions>
+        <Grid Grid.Row="1" Grid.Column="3" RowDefinitions="Auto,15,*">
             <!--Bold text-->
             <TextBox Grid.Row="0" Classes="header" FontFamily="{Binding FontFamily}" Text="{Binding ContentHeader}"
                      IsVisible="{Binding HasHeader}" />
diff --git a/src/MessageBox.Avalonia/Views/MsBoxStandardWindow.xaml b/src/MessageBox.Avalonia/Views/MsBoxStandardWindow.xaml
index 5d92083..9062bc0 100644
--- a/src/MessageBox.Avalonia/Views/MsBoxStandardWindow.xaml
+++ b/src/MessageBox.Avalonia/Views/MsBoxStandardWindow.xaml
@@ -85,22 +85,22 @@
             <TextBox Grid.Row="0" Classes="header" FontFamily="{Binding FontFamily}" Text="{Binding ContentHeader}"
                      IsVisible="{Binding HasHeader}" />
             <!--Content text-->
-            <TextBox Grid.Row="1" FontFamily="{Binding FontFamily}" Text="{Binding ContentMessage}" />
+            <TextBox Grid.Row="1" Classes="contentMessage" FontFamily="{Binding FontFamily}" Text="{Binding ContentMessage}" />
 
         </Grid>
         <!--Buttons-->
         <StackPanel Orientation="Horizontal" Grid.Row="2" Grid.Column="0" Grid.ColumnSpan="2"
                     HorizontalAlignment="Right">
-            <Button Name="OkButton" Content="OK" Tag="Colored" Command="{Binding ButtonClickCommand}"
+            <Button Classes="button ok" Name="OkButton" Content="OK" Tag="Colored" Command="{Binding ButtonClickCommand}"
                     CommandParameter="{Binding $self.Content}"
                     IsVisible="{Binding IsOkShowed}" />
-            <Button Name="YesButton" Content="Yes" Command="{Binding ButtonClickCommand}" CommandParameter="{Binding $self.Content}"
+            <Button Classes="button yes" Name="YesButton" Content="Yes" Command="{Binding ButtonClickCommand}" CommandParameter="{Binding $self.Content}"
                     IsVisible="{Binding IsYesShowed}" />
-            <Button Content="No" Command="{Binding ButtonClickCommand}" CommandParameter="{Binding $self.Content}"
+            <Button Classes="button no" Content="No" Command="{Binding ButtonClickCommand}" CommandParameter="{Binding $self.Content}"
                     IsVisible="{Binding IsNoShowed}" />
-            <Button Content="Abort" Command="{Binding ButtonClickCommand}" CommandParameter="{Binding $self.Content}"
+            <Button Classes="button abort" Content="Abort" Command="{Binding ButtonClickCommand}" CommandParameter="{Binding $self.Content}"
                     IsVisible="{Binding IsAbortShowed}" />
-            <Button Content="Cancel" Command="{Binding ButtonClickCommand}" CommandParameter="{Binding $self.Content}"
+            <Button Classes="button cancel" Content="Cancel" Command="{Binding ButtonClickCommand}" CommandParameter="{Binding $self.Content}"
                     IsVisible="{Binding IsCancelShowed}" />
         </StackPanel>
     </Grid>