ModernAdminStudio/Styles/Theme.xaml

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

    <!-- Color Palette -->
    <Color x:Key="BgDarkColor">#0F172A</Color>
    <Color x:Key="SidebarBgColor">#090D16</Color>
    <Color x:Key="CardBgColor">#1E293B</Color>
    <Color x:Key="CardBorderColor">#334155</Color>
    <Color x:Key="PrimaryAccentColor">#3B82F6</Color>
    <Color x:Key="PrimaryAccentHoverColor">#60A5FA</Color>
    <Color x:Key="TextPrimaryColor">#F8FAFC</Color>
    <Color x:Key="TextSecondaryColor">#94A3B8</Color>
    <Color x:Key="SuccessColor">#10B981</Color>
    <Color x:Key="WarningColor">#F59E0B</Color>
    <Color x:Key="DangerColor">#EF4444</Color>

    <!-- SolidColorBrushes -->
    <SolidColorBrush x:Key="BgDarkBrush" Color="{StaticResource BgDarkColor}" />
    <SolidColorBrush x:Key="SidebarBgBrush" Color="{StaticResource SidebarBgColor}" />
    <SolidColorBrush x:Key="CardBgBrush" Color="{StaticResource CardBgColor}" />
    <SolidColorBrush x:Key="CardBorderBrush" Color="{StaticResource CardBorderColor}" />
    <SolidColorBrush x:Key="PrimaryAccentBrush" Color="{StaticResource PrimaryAccentColor}" />
    <SolidColorBrush x:Key="PrimaryAccentHoverBrush" Color="{StaticResource PrimaryAccentHoverColor}" />
    <SolidColorBrush x:Key="TextPrimaryBrush" Color="{StaticResource TextPrimaryColor}" />
    <SolidColorBrush x:Key="TextSecondaryBrush" Color="{StaticResource TextSecondaryColor}" />
    <SolidColorBrush x:Key="SuccessBrush" Color="{StaticResource SuccessColor}" />
    <SolidColorBrush x:Key="WarningBrush" Color="{StaticResource WarningColor}" />
    <SolidColorBrush x:Key="DangerBrush" Color="{StaticResource DangerColor}" />

    <!-- Default Font -->
    <FontFamily x:Key="ModernFont">Segoe UI, Apple SD Gothic Neo, Malgun Gothic</FontFamily>
    <FontFamily x:Key="IconFont">Segoe MDL2 Assets, Segoe Fluent Icons</FontFamily>

    <!-- Nav Button Style -->
    <Style x:Key="NavButtonStyle" TargetType="RadioButton">
        <Setter Property="Background" Value="Transparent" />
        <Setter Property="Foreground" Value="{StaticResource TextSecondaryBrush}" />
        <Setter Property="Height" Value="46" />
        <Setter Property="Margin" Value="0,2,0,2" />
        <Setter Property="Cursor" Value="Hand" />
        <Setter Property="FontFamily" Value="{StaticResource ModernFont}" />
        <Setter Property="FontSize" Value="13.5" />
        <Setter Property="FontWeight" Value="SemiBold" />
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="RadioButton">
                    <Border x:Name="border"
                            Background="{TemplateBinding Background}"
                            CornerRadius="8"
                            Padding="12,0"
                            Margin="8,2">
                        <Grid>
                            <Rectangle x:Name="indicator"
                                       Width="3.5"
                                       Height="18"
                                       HorizontalAlignment="Left"
                                       Fill="{StaticResource PrimaryAccentBrush}"
                                       RadiusX="2" RadiusY="2"
                                       Visibility="Collapsed" />
                            <ContentPresenter Margin="8,0,0,0"
                                              VerticalAlignment="Center"
                                              RecognizesAccessKey="False" />
                        </Grid>
                    </Border>
                    <ControlTemplate.Triggers>
                        <Trigger Property="IsMouseOver" Value="True">
                            <Setter TargetName="border" Property="Background" Value="#1A2B4C" />
                            <Setter Property="Foreground" Value="{StaticResource TextPrimaryBrush}" />
                        </Trigger>
                        <Trigger Property="IsChecked" Value="True">
                            <Setter TargetName="border" Property="Background" Value="#1E3A8A" />
                            <Setter Property="Foreground" Value="#FFFFFF" />
                            <Setter TargetName="indicator" Property="Visibility" Value="Visible" />
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

    <!-- Modern Action Button -->
    <Style x:Key="PrimaryButtonStyle" TargetType="Button">
        <Setter Property="Background" Value="{StaticResource PrimaryAccentBrush}" />
        <Setter Property="Foreground" Value="#FFFFFF" />
        <Setter Property="FontFamily" Value="{StaticResource ModernFont}" />
        <Setter Property="FontSize" Value="13" />
        <Setter Property="FontWeight" Value="SemiBold" />
        <Setter Property="Padding" Value="16,8" />
        <Setter Property="Cursor" Value="Hand" />
        <Setter Property="BorderThickness" Value="0" />
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="Button">
                    <Border x:Name="btnBorder"
                            Background="{TemplateBinding Background}"
                            CornerRadius="6"
                            Padding="{TemplateBinding Padding}">
                        <ContentPresenter HorizontalAlignment="Center" VerticalAlignment="Center" />
                    </Border>
                    <ControlTemplate.Triggers>
                        <Trigger Property="IsMouseOver" Value="True">
                            <Setter TargetName="btnBorder" Property="Background" Value="{StaticResource PrimaryAccentHoverBrush}" />
                        </Trigger>
                        <Trigger Property="IsPressed" Value="True">
                            <Setter TargetName="btnBorder" Property="Background" Value="#2563EB" />
                        </Trigger>
                        <Trigger Property="IsEnabled" Value="False">
                            <Setter TargetName="btnBorder" Property="Background" Value="#334155" />
                            <Setter Property="Foreground" Value="#64748B" />
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

    <Style x:Key="SecondaryButtonStyle" TargetType="Button">
        <Setter Property="Background" Value="#334155" />
        <Setter Property="Foreground" Value="{StaticResource TextPrimaryBrush}" />
        <Setter Property="FontFamily" Value="{StaticResource ModernFont}" />
        <Setter Property="FontSize" Value="13" />
        <Setter Property="FontWeight" Value="Medium" />
        <Setter Property="Padding" Value="14,7" />
        <Setter Property="Cursor" Value="Hand" />
        <Setter Property="BorderThickness" Value="1" />
        <Setter Property="BorderBrush" Value="#475569" />
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="Button">
                    <Border x:Name="btnBorder"
                            Background="{TemplateBinding Background}"
                            BorderBrush="{TemplateBinding BorderBrush}"
                            BorderThickness="{TemplateBinding BorderThickness}"
                            CornerRadius="6"
                            Padding="{TemplateBinding Padding}">
                        <ContentPresenter HorizontalAlignment="Center" VerticalAlignment="Center" />
                    </Border>
                    <ControlTemplate.Triggers>
                        <Trigger Property="IsMouseOver" Value="True">
                            <Setter TargetName="btnBorder" Property="Background" Value="#475569" />
                        </Trigger>
                        <Trigger Property="IsPressed" Value="True">
                            <Setter TargetName="btnBorder" Property="Background" Value="#1E293B" />
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

    <!-- Modern TextBox Style -->
    <Style x:Key="ModernTextBoxStyle" TargetType="TextBox">
        <Setter Property="Background" Value="#0F172A" />
        <Setter Property="Foreground" Value="#FFFFFF" />
        <Setter Property="BorderBrush" Value="{StaticResource CardBorderBrush}" />
        <Setter Property="BorderThickness" Value="1" />
        <Setter Property="Padding" Value="10,6" />
        <Setter Property="FontFamily" Value="{StaticResource ModernFont}" />
        <Setter Property="FontSize" Value="13" />
        <Setter Property="CaretBrush" Value="{StaticResource PrimaryAccentBrush}" />
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="TextBox">
                    <Border x:Name="border"
                            Background="{TemplateBinding Background}"
                            BorderBrush="{TemplateBinding BorderBrush}"
                            BorderThickness="{TemplateBinding BorderThickness}"
                            CornerRadius="6">
                        <ScrollViewer x:Name="PART_ContentHost"
                                      Margin="2"
                                      VerticalAlignment="Center" />
                    </Border>
                    <ControlTemplate.Triggers>
                        <Trigger Property="IsFocused" Value="True">
                            <Setter TargetName="border" Property="BorderBrush" Value="{StaticResource PrimaryAccentBrush}" />
                        </Trigger>
                        <Trigger Property="IsMouseOver" Value="True">
                            <Setter TargetName="border" Property="BorderBrush" Value="{StaticResource PrimaryAccentHoverBrush}" />
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

    <!-- Modern Card Container Style -->
    <Style x:Key="ModernCardStyle" TargetType="Border">
        <Setter Property="Background" Value="{StaticResource CardBgBrush}" />
        <Setter Property="BorderBrush" Value="{StaticResource CardBorderBrush}" />
        <Setter Property="BorderThickness" Value="1" />
        <Setter Property="CornerRadius" Value="10" />
        <Setter Property="Padding" Value="18" />
        <Setter Property="Margin" Value="6" />
    </Style>

    <!-- ============================================================================== -->
    <!-- Custom Modern ComboBox (완전한 Dark 템플릿 - 회색 시스템 버튼 원천 제거) -->
    <!-- ============================================================================== -->

    <!-- ComboBoxItem Style -->
    <Style x:Key="ModernComboBoxItemStyle" TargetType="ComboBoxItem">
        <Setter Property="Background" Value="#1E293B" />
        <Setter Property="Foreground" Value="#F8FAFC" />
        <Setter Property="Padding" Value="12,8" />
        <Setter Property="FontSize" Value="13" />
        <Setter Property="FontFamily" Value="{StaticResource ModernFont}" />
        <Setter Property="Cursor" Value="Hand" />
        <Setter Property="HorizontalContentAlignment" Value="Left" />
        <Setter Property="VerticalContentAlignment" Value="Center" />
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="ComboBoxItem">
                    <Border x:Name="itemBorder"
                            Background="{TemplateBinding Background}"
                            Padding="{TemplateBinding Padding}">
                        <ContentPresenter HorizontalAlignment="Left" VerticalAlignment="Center" />
                    </Border>
                    <ControlTemplate.Triggers>
                        <Trigger Property="IsMouseOver" Value="True">
                            <Setter TargetName="itemBorder" Property="Background" Value="#2563EB" />
                            <Setter Property="Foreground" Value="#FFFFFF" />
                        </Trigger>
                        <Trigger Property="IsSelected" Value="True">
                            <Setter TargetName="itemBorder" Property="Background" Value="#1D4ED8" />
                            <Setter Property="Foreground" Value="#FFFFFF" />
                            <Setter Property="FontWeight" Value="Bold" />
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

    <!-- ComboBox ToggleButton Template -->
    <ControlTemplate x:Key="ComboBoxToggleButtonTemplate" TargetType="ToggleButton">
        <Border x:Name="templateRoot"
                Background="{TemplateBinding Background}"
                BorderBrush="{TemplateBinding BorderBrush}"
                BorderThickness="{TemplateBinding BorderThickness}"
                CornerRadius="6">
            <Grid HorizontalAlignment="Right" Width="30">
                <!-- Dropdown Arrow Icon -->
                <TextBlock Text="&#xE70D;"
                           FontFamily="{StaticResource IconFont}"
                           FontSize="10"
                           Foreground="{StaticResource TextSecondaryBrush}"
                           HorizontalAlignment="Center"
                           VerticalAlignment="Center" />
            </Grid>
        </Border>
        <ControlTemplate.Triggers>
            <Trigger Property="IsMouseOver" Value="True">
                <Setter TargetName="templateRoot" Property="BorderBrush" Value="{StaticResource PrimaryAccentBrush}" />
            </Trigger>
            <Trigger Property="IsChecked" Value="True">
                <Setter TargetName="templateRoot" Property="BorderBrush" Value="{StaticResource PrimaryAccentHoverBrush}" />
            </Trigger>
        </ControlTemplate.Triggers>
    </ControlTemplate>

    <!-- ComboBox Main Style -->
    <Style TargetType="ComboBox">
        <Setter Property="Background" Value="#0F172A" />
        <Setter Property="Foreground" Value="#F8FAFC" />
        <Setter Property="BorderBrush" Value="{StaticResource CardBorderBrush}" />
        <Setter Property="BorderThickness" Value="1" />
        <Setter Property="Padding" Value="10,6" />
        <Setter Property="FontFamily" Value="{StaticResource ModernFont}" />
        <Setter Property="FontSize" Value="13" />
        <Setter Property="ItemContainerStyle" Value="{StaticResource ModernComboBoxItemStyle}" />
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="ComboBox">
                    <Grid x:Name="templateRoot">
                        <Popup x:Name="PART_Popup"
                               AllowsTransparency="True"
                               IsOpen="{Binding IsDropDownOpen, Mode=TwoWay, RelativeSource={RelativeSource TemplatedParent}}"
                               Placement="Bottom"
                               PopupAnimation="Slide">
                            <Border x:Name="dropDownBorder"
                                    Background="#1E293B"
                                    BorderBrush="#334155"
                                    BorderThickness="1"
                                    CornerRadius="6"
                                    MaxHeight="{TemplateBinding MaxDropDownHeight}"
                                    MinWidth="{Binding ActualWidth, ElementName=templateRoot}">
                                <ScrollViewer x:Name="DropDownScrollViewer" Margin="2">
                                    <ItemsPresenter x:Name="ItemsPresenter" KeyboardNavigation.DirectionalNavigation="Contained" />
                                </ScrollViewer>
                            </Border>
                        </Popup>

                        <!-- Toggle Button (Closed Box) -->
                        <ToggleButton x:Name="toggleButton"
                                      Background="{TemplateBinding Background}"
                                      BorderBrush="{TemplateBinding BorderBrush}"
                                      BorderThickness="{TemplateBinding BorderThickness}"
                                      IsChecked="{Binding IsDropDownOpen, Mode=TwoWay, RelativeSource={RelativeSource TemplatedParent}}"
                                      Template="{StaticResource ComboBoxToggleButtonTemplate}" />

                        <!-- Content Area -->
                        <ContentPresenter x:Name="contentPresenter"
                                          Content="{TemplateBinding SelectionBoxItem}"
                                          ContentTemplate="{TemplateBinding SelectionBoxItemTemplate}"
                                          ContentTemplateSelector="{TemplateBinding ItemTemplateSelector}"
                                          ContentStringFormat="{TemplateBinding SelectionBoxItemStringFormat}"
                                          HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
                                          IsHitTestVisible="False"
                                          Margin="{TemplateBinding Padding}"
                                          VerticalAlignment="{TemplateBinding VerticalContentAlignment}" />
                    </Grid>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

    <!-- ============================================================================== -->
    <!-- Modern DataGrid Sub-Styles (ColumnHeader, Row, Cell 완벽 바인딩) -->
    <!-- ============================================================================== -->

    <!-- 1. ColumnHeader Style -->
    <Style x:Key="ModernColumnHeaderStyle" TargetType="DataGridColumnHeader">
        <Setter Property="Background" Value="#090D16" />
        <Setter Property="Foreground" Value="#93C5FD" />
        <Setter Property="FontWeight" Value="Bold" />
        <Setter Property="FontSize" Value="12.5" />
        <Setter Property="Padding" Value="14,10" />
        <Setter Property="BorderBrush" Value="#334155" />
        <Setter Property="BorderThickness" Value="0,0,1,1" />
        <Setter Property="HorizontalContentAlignment" Value="Left" />
    </Style>

    <!-- 2. Cell Style -->
    <Style x:Key="ModernCellStyle" TargetType="DataGridCell">
        <Setter Property="Background" Value="Transparent" />
        <Setter Property="Foreground" Value="#F8FAFC" />
        <Setter Property="Padding" Value="12,8" />
        <Setter Property="BorderThickness" Value="0" />
        <Setter Property="FocusVisualStyle" Value="{x:Null}" />
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="DataGridCell">
                    <Border Background="{TemplateBinding Background}" Padding="{TemplateBinding Padding}">
                        <ContentPresenter VerticalAlignment="Center" />
                    </Border>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
        <Style.Triggers>
            <Trigger Property="IsSelected" Value="True">
                <Setter Property="Background" Value="#2563EB" />
                <Setter Property="Foreground" Value="#FFFFFF" />
            </Trigger>
        </Style.Triggers>
    </Style>

    <!-- 3. Row Style -->
    <Style x:Key="ModernRowStyle" TargetType="DataGridRow">
        <Setter Property="Background" Value="#1E293B" />
        <Setter Property="Foreground" Value="#F8FAFC" />
        <Setter Property="FontFamily" Value="{StaticResource ModernFont}" />
        <Setter Property="FontSize" Value="12.5" />
        <Setter Property="Cursor" Value="Hand" />
        <Setter Property="BorderThickness" Value="0,0,0,1" />
        <Setter Property="BorderBrush" Value="#2D3748" />
        <Style.Triggers>
            <Trigger Property="IsMouseOver" Value="True">
                <Setter Property="Background" Value="#1E3A8A" />
                <Setter Property="Foreground" Value="#FFFFFF" />
            </Trigger>
            <Trigger Property="IsSelected" Value="True">
                <Setter Property="Background" Value="#2563EB" />
                <Setter Property="Foreground" Value="#FFFFFF" />
            </Trigger>
        </Style.Triggers>
    </Style>

    <!-- 4. Global Modern DataGrid Style -->
    <Style x:Key="ModernDataGridStyle" TargetType="DataGrid">
        <Setter Property="Background" Value="#1E293B" />
        <Setter Property="BorderBrush" Value="{StaticResource CardBorderBrush}" />
        <Setter Property="BorderThickness" Value="1" />
        <Setter Property="Foreground" Value="#F8FAFC" />
        <Setter Property="RowBackground" Value="#1E293B" />
        <Setter Property="AlternatingRowBackground" Value="#162032" />
        <Setter Property="GridLinesVisibility" Value="Horizontal" />
        <Setter Property="HorizontalGridLinesBrush" Value="#2D3748" />
        <Setter Property="VerticalGridLinesBrush" Value="Transparent" />
        <Setter Property="AutoGenerateColumns" Value="False" />
        <Setter Property="CanUserAddRows" Value="False" />
        <Setter Property="CanUserResizeRows" Value="False" />
        <Setter Property="HeadersVisibility" Value="Column" />
        <Setter Property="SelectionMode" Value="Single" />
        <Setter Property="FontFamily" Value="{StaticResource ModernFont}" />
        <Setter Property="FontSize" Value="12.5" />
        <!-- 명시적 서브 스타일 세터 주입 (Windows 기본 흰색 테마 침투 차단) -->
        <Setter Property="ColumnHeaderStyle" Value="{StaticResource ModernColumnHeaderStyle}" />
        <Setter Property="RowStyle" Value="{StaticResource ModernRowStyle}" />
        <Setter Property="CellStyle" Value="{StaticResource ModernCellStyle}" />
    </Style>

    <!-- Default TargetType Styles for Implicit Binding -->
    <Style TargetType="DataGridColumnHeader" BasedOn="{StaticResource ModernColumnHeaderStyle}" />
    <Style TargetType="DataGridCell" BasedOn="{StaticResource ModernCellStyle}" />
    <Style TargetType="DataGridRow" BasedOn="{StaticResource ModernRowStyle}" />

    <!-- CheckBox Style -->
    <Style TargetType="CheckBox">
        <Setter Property="Foreground" Value="#F8FAFC" />
        <Setter Property="FontSize" Value="13" />
        <Setter Property="Cursor" Value="Hand" />
        <Setter Property="VerticalAlignment" Value="Center" />
    </Style>

    <!-- ListBox & ListBoxItem Style -->
    <Style TargetType="ListBoxItem">
        <Setter Property="Background" Value="Transparent" />
        <Setter Property="Foreground" Value="#F8FAFC" />
        <Setter Property="Padding" Value="8,4" />
        <Style.Triggers>
            <Trigger Property="IsMouseOver" Value="True">
                <Setter Property="Background" Value="#1E3A8A" />
                <Setter Property="Foreground" Value="#FFFFFF" />
            </Trigger>
            <Trigger Property="IsSelected" Value="True">
                <Setter Property="Background" Value="#2563EB" />
                <Setter Property="Foreground" Value="#FFFFFF" />
            </Trigger>
        </Style.Triggers>
    </Style>

</ResourceDictionary>