IntuneManagement/UI/Avalonia/Themes/Styles.axaml

<Styles xmlns="https://github.com/avaloniaui"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">

    <!--
        Avalonia port of UI/WPF/Themes/Styles.xaml.

        Paradigm shift: Avalonia has no x:Key on Style; named styles are addressed
        by class instead. Consumers move from
            Style="{StaticResource HoverUnderlineStyle}"
        to
            Classes="hover-underline"
        and the selector becomes
            Style Selector="TextBlock.hover-underline"

        Naming convention: the original PascalCase keys translate to kebab-case
        classes (HoverUnderlineStyle -> hover-underline, LinkButton -> link, etc.)
        per Avalonia community conventions.

        Deferred (will reimplement when a screen actually needs them):
          - ErrorControl   ContentControl with Tag-based DataTrigger
          - ErrorBorder    HasErrors-bound DataTrigger
          - DataGridRow    requires the Avalonia.Controls.DataGrid package
    -->

    <!--
        info-icon: the Avalonia stand-in for WPF's InfoIcon (UI/WPF/Themes/Styles.xaml),
        which is a 12x12 Rectangle filled with a DrawingBrush of three GeometryDrawings.
        A glyph instead of a vector port: U+24D8 CIRCLED LATIN SMALL LETTER I scales with
        the font, inherits the surrounding Foreground so it themes for free, and needs no
        Drawing translation. It is the same glyph the settings dialog already renders
        (Add-SettingsItem in Extensions/CoreUIAvalonia.ps1), so the two agree.

        Consumers put the description on the SURROUNDING StackPanel rather than on the
        glyph, so hovering the label shows it too - Avalonia's dropped InfoIcons had
        moved these tips onto the Label, and this keeps that behaviour while restoring
        the visible marker, without repeating the description string twice:

            <StackPanel Orientation="Horizontal" ToolTip.Tip="...">
                <Label Content="Export root"/>
                <TextBlock Classes="info-icon"/>
            </StackPanel>

        The glyph is written as a numeric entity so the markup stays ASCII - it is also
        embedded in .ps1 here-strings, which ARE covered by the ANSI/CP1252 gate in
        Tests/Static.Tests.ps1 (.axaml files are not, but keeping one spelling avoids
        a trap when this is copied into PowerShell).
    -->
    <Style Selector="TextBlock.info-icon">
        <Setter Property="Text" Value="&#x24D8;"/>
        <Setter Property="FontSize" Value="12"/>
        <Setter Property="Margin" Value="4,0,0,0"/>
        <Setter Property="VerticalAlignment" Value="Center"/>
    </Style>

    <!-- TextBlock named styles -->
    <Style Selector="TextBlock.hover-underline:pointerover">
        <Setter Property="TextDecorations" Value="Underline"/>
    </Style>

    <Style Selector="TextBlock.hover-underline-bg:pointerover">
        <Setter Property="TextDecorations" Value="Underline"/>
        <Setter Property="Background"      Value="LightGray"/>
    </Style>

    <!-- LinkButton: button styled as a text link.
         Templated to a TextBlock (Foreground from button), with hover underline + bg
         and disabled colour driven by DisabledForegroundColor.

         Avalonia note: TextDecorations on Button is not honoured by ContentPresenter
         alone; the templated TextBlock owns the decoration. -->
    <Style Selector="Button.link">
        <!-- WPF paints Hyperlinks blue; body-text colour made links invisible
             as links. LinkColor is per-variant in Brushes.axaml. -->
        <Setter Property="Foreground" Value="{DynamicResource LinkColor}"/>
        <Setter Property="Background" Value="Transparent"/>
        <Setter Property="BorderThickness" Value="0"/>
        <Setter Property="Padding" Value="0"/>
        <Setter Property="Cursor" Value="Hand"/>
        <Setter Property="HorizontalContentAlignment" Value="Left"/>
        <Setter Property="Template">
            <ControlTemplate>
                <TextBlock Name="PART_Text"
                           Text="{TemplateBinding Content}"
                           Foreground="{TemplateBinding Foreground}"
                           Background="{TemplateBinding Background}"/>
            </ControlTemplate>
        </Setter>
    </Style>
    <Style Selector="Button.link:pointerover /template/ TextBlock#PART_Text">
        <Setter Property="TextDecorations" Value="Underline"/>
        <Setter Property="Background"      Value="{DynamicResource SelectedRowBackgroundColor}"/>
    </Style>
    <Style Selector="Button.link:disabled">
        <Setter Property="Foreground" Value="{DynamicResource DisabledForegroundColor}"/>
        <Setter Property="Cursor"     Value="Arrow"/>
    </Style>

    <!-- ContentButton: bare button — just the content with hover background. -->
    <Style Selector="Button.content">
        <Setter Property="Foreground"      Value="{DynamicResource TextColor}"/>
        <Setter Property="Background"      Value="Transparent"/>
        <Setter Property="BorderThickness" Value="0"/>
        <Setter Property="Padding"         Value="0"/>
        <Setter Property="Template">
            <ControlTemplate>
                <ContentPresenter Name="PART_Content"
                                  Background="{TemplateBinding Background}"
                                  Content="{TemplateBinding Content}"/>
            </ControlTemplate>
        </Setter>
    </Style>
    <Style Selector="Button.content:pointerover /template/ ContentPresenter#PART_Content">
        <Setter Property="Background" Value="{DynamicResource SelectedRowBackgroundColor}"/>
    </Style>

    <!-- ListBoxItem default: hover/selected highlights.
         Default.axaml already styles ListBoxItem:selected; this adds :pointerover
         and matches the legacy padding. Targets all ListBoxItems (no class), same
         as the original Styles.xaml. -->
    <Style Selector="ListBoxItem">
        <Setter Property="Foreground" Value="{DynamicResource TextColor}"/>
        <Setter Property="Padding"    Value="2"/>
    </Style>
    <Style Selector="ListBoxItem:pointerover /template/ ContentPresenter">
        <Setter Property="Background"  Value="{DynamicResource SelectedRowBackgroundColor}"/>
        <Setter Property="BorderBrush" Value="{DynamicResource SelectedRowBackgroundColor}"/>
    </Style>

    <!-- Intune Manager grid, ObjectListFirstLineOnly setting (WPF parity): the
         firstLine class is toggled by Add-IntuneManagerDataGridColumns. Nested
         ^ selector so the rule follows the class on the grid, not on the cell. -->
    <Style Selector="DataGrid.firstLine">
        <Style Selector="^ DataGridCell TextBlock">
            <Setter Property="MaxLines" Value="1"/>
            <Setter Property="TextTrimming" Value="CharacterEllipsis"/>
        </Style>
    </Style>

</Styles>