modernkeepass/ModernKeePass/Styles/HamburgerButtonStyle.xaml

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

    <Style TargetType="ToggleButton" x:Name="HamburgerToggleButton">
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="ToggleButton">
                    <ContentControl>
                        <Grid Background="{StaticResource ListViewItemSelectedBackgroundThemeBrush}" Margin="0" Width="50" Height="50">
                            <Canvas x:Name="hampurger_menu" HorizontalAlignment="Center" Height="17" UseLayoutRounding="False" VerticalAlignment="Center" Width="28">
                                <Canvas x:Name="Layer_1" Height="17" Canvas.Left="0" Width="28" Margin="0" RenderTransformOrigin="0.5,0.5">
                                    <Canvas.RenderTransform>
                                        <CompositeTransform/>
                                    </Canvas.RenderTransform>
                                    <Canvas.Projection>
                                        <PlaneProjection/>
                                    </Canvas.Projection>
                                    <Path x:Name="path" Data="M0,12.997 L30,12.997" Height="3" Stretch="Fill" StrokeThickness="3" Width="28" Stroke="{ThemeResource DefaultTextForegroundThemeBrush}" StrokeStartLineCap="Square" StrokeEndLineCap="Square" RenderTransformOrigin="0.5,0.5">
                                        <Path.RenderTransform>
                                            <CompositeTransform/>
                                        </Path.RenderTransform>
                                    </Path>
                                    <Path Data="M0,12.997 L30,12.997" Height="3" Stretch="Fill" StrokeThickness="3" Width="28" Stroke="{ThemeResource DefaultTextForegroundThemeBrush}" StrokeStartLineCap="Square" StrokeEndLineCap="Square" Canvas.Top="7"/>
                                    <Path x:Name="path1" Data="M0,12.997 L30,12.997" Height="3" Stretch="Fill" StrokeThickness="3" Width="28" Stroke="{ThemeResource DefaultTextForegroundThemeBrush}" StrokeStartLineCap="Square" StrokeEndLineCap="Square" Canvas.Top="14" RenderTransformOrigin="0.5,0.5">
                                        <Path.RenderTransform>
                                            <CompositeTransform/>
                                        </Path.RenderTransform>
                                    </Path>
                                </Canvas>
                            </Canvas>
                        </Grid>
                    </ContentControl>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
        <Setter Property="VerticalAlignment" Value="Top" />
        <Setter Property="HorizontalAlignment" Value="Left" />
        <Setter Property="Margin" Value="0" />
    </Style>
    <Style x:Key="HeaderTextBoxStyle" TargetType="TextBox">
        <Setter Property="FontSize" Value="40"/>
        <Setter Property="FontWeight" Value="Light"/>
        <Setter Property="BorderBrush" Value="Transparent" />
        <Setter Property="Background" Value="Transparent" />
    </Style>
</ResourceDictionary>