SPT-AKI-Installer/SPTInstaller/Assets/Styles.axaml

<Styles xmlns="https://github.com/avaloniaui"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:cc="using:SPTInstaller.CustomControls">
    <Design.PreviewWith>
        <StackPanel Spacing="5" Background="{StaticResource SPT_Background_Dark}">
            <Button Classes="icon" x:Name="testBtn">
                <Path Data="{StaticResource Bug}"
                      Fill="{Binding ElementName=testBtn, Path=Foreground}" />
            </Button>
            <TextBox Text="Some cool text here" Margin="5" />
            <TextBox Watermark="This is a watermark" Margin="5" />
            <CheckBox Content="sldkflskdf" />
        </StackPanel>
    </Design.PreviewWith>

    <!-- Add Styles Here -->

    <!-- TitleBar Styles -->
    <Style Selector="cc|TitleBar">
        <Setter Property="Background" Value="{StaticResource SPT_Background_Dark}" />
        <Setter Property="Foreground" Value="{StaticResource SPT_Foreground_Light}" />
        <Setter Property="ButtonForeground" Value="{StaticResource SPT_Brush_DarkGrayBlue}" />
    </Style>

    <Style Selector="cc|TitleBar.versiontag">
        <Setter Property="BorderBrush" Value="{StaticResource SPT_Brush_Yellow}" />
        <Setter Property="BorderThickness" Value="0 0 0 2" />
    </Style>

    <!-- TextBox Styles -->
    <!-- SourceRef: https://github.com/AvaloniaUI/Avalonia/blob/master/src/Avalonia.Themes.Fluent/Controls/TextBox.xaml -->
    <Style Selector="TextBox">
        <Setter Property="Background" Value="{StaticResource SPT_Background_Light}" />
        <Setter Property="FontWeight" Value="SemiBold" />
        <Setter Property="Foreground" Value="{StaticResource SPT_Brush_Lighter}" />
    </Style>

    <Style Selector="TextBox:focus">
        <Setter Property="Foreground" Value="{StaticResource SPT_Brush_Lighter}" />
    </Style>

    <Style Selector="TextBox:pointerover">
        <Setter Property="Foreground" Value="{StaticResource SPT_Brush_Lighter}" />
    </Style>

    <Style Selector="TextBox:pointerover /template/ Border#PART_BorderElement">
        <Setter Property="Background" Value="Transparent" />
        <Setter Property="BorderBrush" Value="DimGray" />
    </Style>

    <Style
        Selector="TextBox:pointerover /template/ TextBlock#PART_Watermark, TextBox:focus /template/ TextBlock#PART_FloatingWatermark">
        <Setter Property="Foreground" Value="DimGray" />
    </Style>

    <Style
        Selector="TextBox:focus /template/ TextBlock#PART_Watermark, TextBox:focus /template/ TextBlock#PART_FloatingWatermark">
        <Setter Property="Foreground" Value="DimGray" />
    </Style>

    <Style
        Selector="TextBox /template/ TextBlock#PART_Watermark, TextBox:focus /template/ TextBlock#PART_FloatingWatermark">
        <Setter Property="Foreground" Value="White" />
    </Style>

    <Style Selector="TextBox:focus /template/ Border#PART_BorderElement">
        <Setter Property="Background" Value="Transparent" />
        <Setter Property="BorderBrush" Value="{StaticResource SPT_Brush_Yellow}" />
        <Setter Property="BorderThickness" Value="1" />
    </Style>

    <!-- TextBlock Styles -->
    <Style Selector="TextBlock">
        <Setter Property="Foreground" Value="{StaticResource SPT_Foreground_Light}" />
    </Style>

    <!-- Label Styles -->
    <!-- SourceRef: https://github.com/AvaloniaUI/Avalonia/blob/master/src/Avalonia.Themes.Fluent/Controls/Label.xaml -->
    <Style Selector="Label">
        <Setter Property="Foreground" Value="{StaticResource SPT_Foreground_Light}" />
    </Style>

    <Style Selector="Label.yellow">
        <Setter Property="Foreground" Value="{StaticResource SPT_Brush_Yellow}" />
    </Style>

    <Style Selector="Label.dark">
        <Setter Property="Foreground" Value="DimGray" />
    </Style>

    <Style Selector="Label.versionMismatch">
        <Setter Property="Foreground" Value="OrangeRed" />
    </Style>

    <!-- ProgressBar Styles -->
    <!-- SourceRef: https://github.com/AvaloniaUI/Avalonia/blob/master/src/Avalonia.Themes.Fluent/Controls/ProgressBar.xaml -->
    <Style Selector="ProgressBar">
        <Setter Property="Foreground" Value="{StaticResource SPT_Brush_Yellow}" />
        <Setter Property="Background" Value="{StaticResource SPT_Brush_DarkGrayBlue}" />
    </Style>

    <Style Selector="ProgressBar.error">
        <Setter Property="Foreground" Value="Red" />
        <Style.Animations>
            <Animation Duration="0:0:0.5" FillMode="Forward">
                <KeyFrame Cue="0%">
                    <Setter Property="Foreground" Value="{StaticResource SPT_Brush_Yellow}" />
                    <Setter Property="Value" Value="0" />
                </KeyFrame>
                <KeyFrame Cue="100%">
                    <Setter Property="Foreground" Value="Red" />
                    <Setter Property="Value" Value="100" />
                </KeyFrame>
            </Animation>
        </Style.Animations>
    </Style>

    <!-- Seperator Styles -->
    <!-- SourceRef: https://github.com/AvaloniaUI/Avalonia/blob/master/src/Avalonia.Themes.Fluent/Controls/Separator.xaml -->
    <Style Selector="Separator">
        <Setter Property="Background" Value="{StaticResource SPT_Background_Dark}" />
    </Style>

    <!-- Button Styles -->
    <!-- SourceRef: https://github.com/AvaloniaUI/Avalonia/blob/master/src/Avalonia.Themes.Fluent/Controls/Button.xaml -->
    <Style Selector="Button">
        <Setter Property="Background" Value="{StaticResource SPT_Brush_DarkGrayBlue}" />
        <Setter Property="Foreground" Value="{StaticResource SPT_White}" />
    </Style>

    <Style Selector="Button:pointerover /template/ ContentPresenter">
        <Setter Property="Background" Value="{StaticResource SPT_LightGrayBlue}" />
        <Setter Property="BorderBrush" Value="{StaticResource SPT_LightGrayBlue}" />
        <Setter Property="Foreground" Value="{StaticResource SPT_White}" />
        <Setter Property="BorderThickness" Value="1" />
    </Style>

    <Style Selector="Button:pressed /template/ ContentPresenter">
        <Setter Property="Background" Value="{StaticResource SPT_Brush_Yellow}" />
    </Style>

    <Style Selector="Button:disabled /template/ ContentPresenter">
        <Setter Property="Background" Value="Transparent" />
        <Setter Property="BorderBrush" Value="{StaticResource SPT_Brush_DarkGrayBlue}" />
    </Style>

    <!-- Button yellow -->
    <Style Selector="Button.yellow">
        <Setter Property="Background" Value="{StaticResource SPT_Brush_Yellow}" />
        <Setter Property="Foreground" Value="{StaticResource SPT_Background_Dark}" />
        <Setter Property="FontWeight" Value="SemiBold" />
    </Style>

    <Style Selector="Button.yellow:pointerover">
        <Setter Property="FontWeight" Value="SemiBold" />
    </Style>

    <Style Selector="Button.yellow:pointerover /template/ ContentPresenter">
        <Setter Property="Background" Value="Gold" />
        <Setter Property="BorderBrush" Value="{StaticResource SPT_Brush_DarkGrayBlue}" />
        <Setter Property="Foreground" Value="{StaticResource SPT_Background_Dark}" />
        <Setter Property="BorderThickness" Value="1" />
    </Style>

    <Style Selector="Button.yellow:pressed /template/ ContentPresenter">
        <Setter Property="Background" Value="{StaticResource SPT_Brush_Lighter}" />
    </Style>

    <Style Selector="Button.yellow:disabled /template/ ContentPresenter">
        <Setter Property="Background" Value="Transparent" />
        <Setter Property="BorderBrush" Value="{StaticResource SPT_Brush_DarkGrayBlue}" />
    </Style>

    <!-- Button outlined Style -->
    <Style Selector="Button.outlined">
        <Setter Property="Foreground" Value="{StaticResource SPT_Brush_Lighter}" />
        <Setter Property="Background" Value="Transparent" />
        <Setter Property="BorderBrush" Value="{StaticResource SPT_Brush_DarkGrayBlue}" />
        <Setter Property="BorderThickness" Value="2" />
    </Style>

    <Style Selector="Button.outlined:pointerover /template/ ContentPresenter">
        <Setter Property="TextBlock.Foreground" Value="{StaticResource SPT_Brush_Yellow}" />
        <Setter Property="Background" Value="Transparent" />
        <Setter Property="BorderBrush" Value="{StaticResource SPT_Brush_Yellow}" />
        <Setter Property="BorderThickness" Value="2" />
    </Style>

    <Style Selector="Button.outlined:pressed /template/ ContentPresenter">
        <Setter Property="TextBlock.Foreground" Value="{StaticResource SPT_Brush_DarkGrayBlue}" />
        <Setter Property="Background" Value="Transparent" />
        <Setter Property="BorderBrush" Value="Transparent" />
        <Setter Property="BorderThickness" Value="0" />
    </Style>

    <!-- Button Link Style -->
    <Style Selector="Button.link">
        <Setter Property="Foreground" Value="{StaticResource SPT_Brush_Lighter}" />
        <Setter Property="Background" Value="Transparent" />
        <Setter Property="BorderBrush" Value="Transparent" />
        <Setter Property="BorderThickness" Value="0 0 0 1" />
        <Setter Property="ContentTemplate">
            <Setter.Value>
                <DataTemplate>
                    <TextBlock Text="{Binding $parent[Button].Content}" TextDecorations="Underline" />
                </DataTemplate>
            </Setter.Value>
        </Setter>
    </Style>

    <Style Selector="Button.link:pointerover TextBlock">
        <Setter Property="Foreground" Value="{StaticResource SPT_Brush_Yellow}" />
    </Style>

    <Style Selector="Button.link:pressed TextBlock">
        <Setter Property="Foreground" Value="{StaticResource SPT_Brush_DarkGrayBlue}" />
    </Style>

    <Style Selector="Button.link:pointerover /template/ ContentPresenter">
        <Setter Property="TextBlock.Foreground" Value="{StaticResource SPT_Brush_Yellow}" />
        <Setter Property="Background" Value="Transparent" />
        <Setter Property="BorderBrush" Value="Transparent" />
        <Setter Property="BorderThickness" Value="0 0 0 1" />
    </Style>

    <Style Selector="Button.link:pressed /template/ ContentPresenter">
        <Setter Property="TextBlock.Foreground" Value="{StaticResource SPT_Brush_DarkGrayBlue}" />
        <Setter Property="Background" Value="Transparent" />
        <Setter Property="BorderBrush" Value="Transparent" />
        <Setter Property="BorderThickness" Value="0 0 0 1" />
    </Style>

    <!-- Button outlinedTLCorner Style -->
    <Style Selector="Button.outlinedTLCorner">
        <Setter Property="Foreground" Value="{StaticResource SPT_Brush_Lighter}" />
        <Setter Property="Background" Value="Transparent" />
        <Setter Property="BorderBrush" Value="{StaticResource SPT_Brush_DarkGrayBlue}" />
        <Setter Property="BorderThickness" Value="2 2 0 0" />
    </Style>

    <Style Selector="Button.outlinedTLCorner:pointerover /template/ ContentPresenter">
        <Setter Property="TextBlock.Foreground" Value="{StaticResource SPT_Brush_Yellow}" />
        <Setter Property="Background" Value="Transparent" />
        <Setter Property="BorderBrush" Value="{StaticResource SPT_Brush_Yellow}" />
        <Setter Property="BorderThickness" Value="2 2 0 0" />
    </Style>

    <Style Selector="Button.outlinedTLCorner:pressed /template/ ContentPresenter">
        <Setter Property="TextBlock.Foreground" Value="{StaticResource SPT_Brush_DarkGrayBlue}" />
        <Setter Property="Background" Value="Transparent" />
        <Setter Property="BorderBrush" Value="Transparent" />
        <Setter Property="BorderThickness" Value="0" />
    </Style>

    <!-- Button icon Style -->
    <Style Selector="Button.icon">
        <Setter Property="Background" Value="Transparent" />
        <Setter Property="Foreground" Value="White" />
    </Style>
    <Style Selector="Button.icon:pointerover">
        <Setter Property="Background" Value="Transparent" />
        <Setter Property="Foreground" Value="{StaticResource SPT_Brush_Yellow}" />
    </Style>
    <Style Selector="Button.icon:pointerover /template/ ContentPresenter">
        <Setter Property="Background" Value="Transparent" />
        <Setter Property="BorderBrush" Value="Transparent" />
    </Style>
    <Style Selector="Button.icon:pressed">
        <Setter Property="Foreground" Value="{StaticResource SPT_DarkGrayBlue}"></Setter>
    </Style>
    
    <!-- Checkbox Styles -->
    <Style Selector="CheckBox">
        <Setter Property="Foreground" Value="White"/>
        <Style.Resources>
            <SolidColorBrush x:Key="CheckBoxCheckBackgroundStrokeUnchecked" Color="DimGray"/>
        </Style.Resources>
    </Style>
    <Style Selector="CheckBox:pointerover /template/ ContentPresenter#ContentPresenter">
        <Setter Property="Foreground" Value="White"/>
    </Style>
    
    <Style Selector="CheckBox:checked /template/ ContentPresenter#ContentPresenter">
        <Setter Property="Foreground" Value="White"/>
    </Style>
    
    <Style Selector="CheckBox:pointerover /template/ Border#NormalRectangle">
        <Setter Property="BorderBrush" Value="{StaticResource SPT_Yellow}"/>
    </Style>
    <Style Selector="CheckBox:checked /template/ Border#NormalRectangle">
        <Setter Property="BorderBrush" Value="{StaticResource SPT_Yellow}"/>
        <Setter Property="Background" Value="{StaticResource SPT_DarkGrayBlue}"/>
    </Style>
    <Style Selector="CheckBox:checked /template/ Path#CheckGlyph">
        <Setter Property="Fill" Value="{StaticResource SPT_Yellow}"/>
    </Style>
</Styles>