App.xaml

<Application x:Class="wagtail.App"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:local="clr-namespace:wagtail"
             StartupUri="MainWindow.xaml">
    <Application.Resources>
        <ResourceDictionary>
            <!-- Global Window Style -->
            <Style TargetType="{x:Type Window}">
                <Setter Property="Background" Value="#1E1E1E"/>
            </Style>
            
            <!-- Global TextBlock Style -->
            <Style TargetType="{x:Type TextBlock}">
                <Setter Property="Foreground" Value="#FFFFFF"/>
            </Style>
            
            <!-- Global TextBox Style -->
            <Style TargetType="{x:Type TextBox}">
                <Setter Property="Background" Value="#333333"/>
                <Setter Property="Foreground" Value="#FFFFFF"/>
                <Setter Property="BorderThickness" Value="1"/>
                <Setter Property="BorderBrush" Value="#444444"/>
                <Setter Property="CaretBrush" Value="#FFFFFF"/>
            </Style>

            <!-- Global Button Style -->
            <Style TargetType="{x:Type Button}">
                <Setter Property="Background" Value="#2E8B57"/>
                <Setter Property="Foreground" Value="#FFFFFF"/>
                <Setter Property="BorderThickness" Value="1"/>
                <Setter Property="BorderBrush" Value="#1E1E1E"/>
                <Setter Property="Padding" Value="10"/>
            </Style>

            <!-- Global ListView Style -->
            <Style TargetType="{x:Type ListView}">
                <Setter Property="Background" Value="#333333"/>
                <Setter Property="Foreground" Value="#FFFFFF"/>
            </Style>

            <!-- Add more global styles here -->
        </ResourceDictionary>
    </Application.Resources>
</Application>