Sweaty-Launcher/Style/NavigationItemContainerStyle.xaml

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

    <Style x:Key="FocusVisual">
        <Setter Property="Control.Template">
            <Setter.Value>
                <ControlTemplate>
                    <Rectangle
                        Margin="2"
                        SnapsToDevicePixels="true"
                        Stroke="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}"
                        StrokeDashArray="1 2"
                        StrokeThickness="1" />
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>
    <SolidColorBrush x:Key="Item.MouseOver.Background" Color="#e6e9ee" />
    <SolidColorBrush x:Key="Item.MouseOver.Border" Color="#a826A0Da" />
    <SolidColorBrush x:Key="Item.SelectedActive.Background" Color="#b8dbf1" />
    <SolidColorBrush x:Key="Item.SelectedActive.Border" Color="#FF26A0DA" />
    <SolidColorBrush x:Key="Item.SelectedInactive.Background" Color="#b8dbf1" />
    <SolidColorBrush x:Key="Item.SelectedInactive.Border" Color="#FFDADADA" />
    <Style x:Key="NavigationItemContainerStyle" TargetType="{x:Type ListBoxItem}">
        <Setter Property="SnapsToDevicePixels" Value="True" />
        <Setter Property="Padding" Value="20,10" />
        <Setter Property="FontSize" Value="14" />
        <Setter Property="Margin" Value="10,0" />

        <Setter Property="HorizontalContentAlignment" Value="{Binding HorizontalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}" />
        <Setter Property="VerticalContentAlignment" Value="{Binding VerticalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}" />
        <Setter Property="Background" Value="Transparent" />
        <Setter Property="BorderBrush" Value="Transparent" />
        <Setter Property="BorderThickness" Value="0" />
        <Setter Property="FocusVisualStyle" Value="{StaticResource FocusVisual}" />
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type ListBoxItem}">
                    <Border
                        x:Name="Bd"
                        Padding="{TemplateBinding Padding}"
                        Background="{TemplateBinding Background}"
                        BorderBrush="{TemplateBinding BorderBrush}"
                        BorderThickness="{TemplateBinding BorderThickness}"
                        CornerRadius="20"
                        SnapsToDevicePixels="true">
                        <ContentPresenter
                            HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
                            VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
                            SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
                    </Border>
                    <ControlTemplate.Triggers>
                        <MultiTrigger>
                            <MultiTrigger.Conditions>
                                <Condition Property="IsMouseOver" Value="True" />
                            </MultiTrigger.Conditions>
                            <Setter TargetName="Bd" Property="Background" Value="{StaticResource Item.MouseOver.Background}" />
                            <Setter TargetName="Bd" Property="BorderBrush" Value="{StaticResource Item.MouseOver.Border}" />
                        </MultiTrigger>
                        <MultiTrigger>
                            <MultiTrigger.Conditions>
                                <Condition Property="Selector.IsSelectionActive" Value="False" />
                                <Condition Property="IsSelected" Value="True" />
                            </MultiTrigger.Conditions>
                            <Setter Property="FontWeight" Value="Bold" />
                            <Setter Property="Foreground" Value="#111d35" />
                            <Setter TargetName="Bd" Property="Background" Value="{StaticResource Item.SelectedInactive.Background}" />
                            <Setter TargetName="Bd" Property="BorderBrush" Value="{StaticResource Item.SelectedInactive.Border}" />
                        </MultiTrigger>
                        <MultiTrigger>
                            <MultiTrigger.Conditions>
                                <Condition Property="Selector.IsSelectionActive" Value="True" />
                                <Condition Property="IsSelected" Value="True" />
                            </MultiTrigger.Conditions>
                            <Setter Property="FontWeight" Value="Bold" />
                            <Setter Property="Foreground" Value="#111d35" />
                            <Setter TargetName="Bd" Property="Background" Value="{StaticResource Item.SelectedActive.Background}" />
                            <Setter TargetName="Bd" Property="BorderBrush" Value="{StaticResource Item.SelectedActive.Border}" />
                        </MultiTrigger>
                        <Trigger Property="IsEnabled" Value="False">
                            <Setter TargetName="Bd" Property="TextElement.Foreground" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}" />
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>
</ResourceDictionary>