Torch/Torch.Server/Themes/Dark Theme.xaml

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">

    <ResourceDictionary.MergedDictionaries>
        <!-- MahApps.Metro resource dictionaries. Make sure that all file names are Case Sensitive! -->
        <ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Controls.xaml" />
        <ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Fonts.xaml" />
        <!-- AppTheme setting -->
        <ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Themes/Dark.Blue.xaml" />
        <ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Controls.Tabcontrol.xaml" />
    </ResourceDictionary.MergedDictionaries>

    <Style TargetType="TabControl">
        <Setter Property="Background" Value="Transparent"/>
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="TabControl">
                    <Grid ClipToBounds="true" SnapsToDevicePixels="true" KeyboardNavigation.TabNavigation="Local">
                        <Grid.ColumnDefinitions>
                            <ColumnDefinition x:Name="ColumnDefinition0"/>
                            <ColumnDefinition x:Name="ColumnDefinition1" Width="0"/>
                        </Grid.ColumnDefinitions>
                        <Grid.RowDefinitions>
                            <RowDefinition x:Name="RowDefinition0" Height="Auto"/>
                            <RowDefinition x:Name="RowDefinition1" Height="*"/>
                        </Grid.RowDefinitions>
                        <StackPanel x:Name="HeaderPanel" Grid.Column="0" IsItemsHost="true" Margin="2,2,2,0" Grid.Row="0" KeyboardNavigation.TabIndex="1" Panel.ZIndex="1" Orientation="Horizontal"/>
                        <Border x:Name="ContentPanel" BorderBrush="Transparent" BorderThickness="{TemplateBinding BorderThickness}" Background="Transparent" Grid.Column="0" KeyboardNavigation.DirectionalNavigation="Contained" Grid.Row="1" KeyboardNavigation.TabIndex="2" KeyboardNavigation.TabNavigation="Local">
                            <ContentPresenter x:Name="PART_SelectedContentHost" ContentSource="SelectedContent" Margin="{TemplateBinding Padding}" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
                        </Border>

                        <ScrollViewer HorizontalScrollBarVisibility="Auto"  VerticalScrollBarVisibility="Hidden">
                            <TabPanel x:Name="HeaderPanel2"
                          Panel.ZIndex ="1" 
                          KeyboardNavigation.TabIndex="1"
                          Grid.Column="0"
                          Grid.Row="0"
                          Margin="2,2,2,0"
                          IsItemsHost="true"/>
                        </ScrollViewer>
                    </Grid>
                    <ControlTemplate.Triggers>
                        <Trigger Property="TabStripPlacement" Value="Bottom">
                            <Setter Property="Grid.Row" TargetName="HeaderPanel" Value="1"/>
                            <Setter Property="Grid.Row" TargetName="ContentPanel" Value="0"/>
                            <Setter Property="Height" TargetName="RowDefinition0" Value="*"/>
                            <Setter Property="Height" TargetName="RowDefinition1" Value="Auto"/>
                            <Setter Property="Margin" TargetName="HeaderPanel" Value="2,0,2,2"/>
                        </Trigger>
                        <Trigger Property="TabStripPlacement" Value="Left">
                            <Setter Property="Grid.Row" TargetName="HeaderPanel" Value="0"/>
                            <Setter Property="Grid.Row" TargetName="ContentPanel" Value="0"/>
                            <Setter Property="Grid.Column" TargetName="HeaderPanel" Value="0"/>
                            <Setter Property="Grid.Column" TargetName="ContentPanel" Value="1"/>
                            <Setter Property="Width" TargetName="ColumnDefinition0" Value="Auto"/>
                            <Setter Property="Width" TargetName="ColumnDefinition1" Value="*"/>
                            <Setter Property="Height" TargetName="RowDefinition0" Value="*"/>
                            <Setter Property="Height" TargetName="RowDefinition1" Value="0"/>
                            <Setter Property="Margin" TargetName="HeaderPanel" Value="2,2,0,2"/>
                        </Trigger>
                        <Trigger Property="TabStripPlacement" Value="Right">
                            <Setter Property="Grid.Row" TargetName="HeaderPanel" Value="0"/>
                            <Setter Property="Grid.Row" TargetName="ContentPanel" Value="0"/>
                            <Setter Property="Grid.Column" TargetName="HeaderPanel" Value="1"/>
                            <Setter Property="Grid.Column" TargetName="ContentPanel" Value="0"/>
                            <Setter Property="Width" TargetName="ColumnDefinition0" Value="*"/>
                            <Setter Property="Width" TargetName="ColumnDefinition1" Value="Auto"/>
                            <Setter Property="Height" TargetName="RowDefinition0" Value="*"/>
                            <Setter Property="Height" TargetName="RowDefinition1" Value="0"/>
                            <Setter Property="Margin" TargetName="HeaderPanel" Value="0,2,2,2"/>
                        </Trigger>
                        <Trigger Property="IsEnabled" Value="false">
                            <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

    <Style TargetType="Hyperlink" x:Name="LegalshtuffLink">
        <Setter Property="NavigateUri" Value="https://github.com/MahApps/MahApps.Metro/blob/develop/LICENSE" />
    </Style>
</ResourceDictionary>