simple-launcher/MainWindow.xaml

<Window x:Class="OfflineMinecraftLauncher.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:shell="clr-namespace:System.Windows.Shell;assembly=PresentationFramework"
        Title="Athena Studios Launcher"
        Height="640" Width="1040" MinHeight="560" MinWidth="900"
        WindowStartupLocation="CenterScreen"
        WindowStyle="None"
        Background="{StaticResource BgBrush}"
        Icon="pack://application:,,,/minecraft.ico"
        Opacity="0">

    <shell:WindowChrome.WindowChrome>
        <shell:WindowChrome CaptionHeight="44" ResizeBorderThickness="6" CornerRadius="0" GlassFrameThickness="0"/>
    </shell:WindowChrome.WindowChrome>

    <Border Background="{StaticResource BgBrush}" BorderBrush="{StaticResource BorderBrush}" BorderThickness="1">
        <Grid>
            <Grid.RowDefinitions>
                <RowDefinition Height="44"/>
                <RowDefinition Height="*"/>
            </Grid.RowDefinitions>

            <!-- ===== Title bar ===== -->
            <Grid Grid.Row="0" Background="#FF0B0E13">
                <StackPanel Orientation="Horizontal" VerticalAlignment="Center" Margin="14,0">
                    <Image Source="pack://application:,,,/images/athlogonoback.png" Width="22" Height="22" Margin="0,0,10,0"/>
                    <TextBlock Text="ATHENA STUDIOS" FontWeight="Bold" FontSize="13" VerticalAlignment="Center" Foreground="{StaticResource TextBrush}"/>
                    <TextBlock Text="LAUNCHER" FontWeight="Bold" FontSize="13" VerticalAlignment="Center" Margin="6,0,0,0" Foreground="{StaticResource AccentGlowBrush}"/>
                </StackPanel>
                <StackPanel Orientation="Horizontal" HorizontalAlignment="Right" shell:WindowChrome.IsHitTestVisibleInChrome="True">
                    <Button x:Name="BtnMinimize" Style="{StaticResource CaptionButton}" Click="BtnMinimize_Click" ToolTip="Küçült">
                        <Rectangle Width="11" Height="1" Fill="{Binding Foreground, RelativeSource={RelativeSource AncestorType=Button}}"/>
                    </Button>
                    <Button x:Name="BtnClose" Style="{StaticResource CloseButton}" Click="BtnClose_Click" ToolTip="Kapat">
                        <Path Data="M0,0 L10,10 M0,10 L10,0" Width="10" Height="10" Stretch="None"
                              Stroke="{Binding Foreground, RelativeSource={RelativeSource AncestorType=Button}}" StrokeThickness="1.3"/>
                    </Button>
                </StackPanel>
            </Grid>

            <!-- ===== Body ===== -->
            <Grid Grid.Row="1">
                <Grid.ColumnDefinitions>
                    <ColumnDefinition Width="224"/>
                    <ColumnDefinition Width="*"/>
                </Grid.ColumnDefinitions>

                <!-- Sidebar -->
                <Border Grid.Column="0" Background="{StaticResource SidebarGradient}" BorderBrush="{StaticResource BorderBrush}" BorderThickness="0,0,1,0">
                    <Grid>
                        <Grid.RowDefinitions>
                            <RowDefinition Height="Auto"/>
                            <RowDefinition Height="*"/>
                            <RowDefinition Height="Auto"/>
                        </Grid.RowDefinitions>

                        <StackPanel Grid.Row="0" Margin="0,22,0,18" HorizontalAlignment="Center">
                            <Image Source="pack://application:,,,/images/athlogonoback.png" Width="76" Height="76"/>
                            <TextBlock Text="ATHENA STUDIOS" FontWeight="Bold" FontSize="14" HorizontalAlignment="Center" Margin="0,8,0,0"/>
                            <TextBlock Text="1.12.2 Forge" FontSize="11" Foreground="{StaticResource TextMutedBrush}" HorizontalAlignment="Center" Margin="0,2,0,0"/>
                        </StackPanel>

                        <StackPanel Grid.Row="1" Margin="0,8,0,0">
                            <RadioButton x:Name="NavHome" Style="{StaticResource NavButton}" Content="🏠   Ana Sayfa" IsChecked="True" Checked="Nav_Checked" Tag="home"/>
                            <RadioButton x:Name="NavMods" Style="{StaticResource NavButton}" Content="🧩   Modlar" Checked="Nav_Checked" Tag="mods"/>
                            <RadioButton x:Name="NavNews" Style="{StaticResource NavButton}" Content="📰   Haberler" Checked="Nav_Checked" Tag="news"/>
                            <RadioButton x:Name="NavSettings" Style="{StaticResource NavButton}" Content="⚙️   Ayarlar" Checked="Nav_Checked" Tag="settings"/>
                        </StackPanel>

                        <StackPanel Grid.Row="2" Margin="16,0,16,16">
                            <Border Height="1" Background="{StaticResource BorderBrush}" Margin="0,0,0,12"/>
                            <Grid Margin="0,0,0,12">
                                <Grid.ColumnDefinitions><ColumnDefinition Width="*"/><ColumnDefinition Width="*"/></Grid.ColumnDefinitions>
                                <Button Grid.Column="0" Content="💬 Discord" Style="{StaticResource GhostButton}" FontSize="12" Padding="6,7" Margin="0,0,4,0" Click="Discord_Click"/>
                                <Button Grid.Column="1" Content="🌐 Web" Style="{StaticResource GhostButton}" FontSize="12" Padding="6,7" Margin="4,0,0,0" Click="Website_Click"/>
                            </Grid>
                            <TextBlock x:Name="SidebarStatus" Text="Sunucu durumu yükleniyor…" FontSize="11" Foreground="{StaticResource TextMutedBrush}" TextWrapping="Wrap"/>
                            <TextBlock x:Name="SidebarVersion" Text="Launcher v2.0.0" FontSize="10" Foreground="{StaticResource TextMutedBrush}" Margin="0,8,0,0"/>
                        </StackPanel>
                    </Grid>
                </Border>

                <!-- Page host -->
                <Grid Grid.Column="1" Background="{StaticResource HeroGradient}">
                    <ContentControl x:Name="PageHost"/>

                    <!-- Loading overlay -->
                    <Grid x:Name="LoadingOverlay" Background="#CC0E1116" Visibility="Visible">
                        <StackPanel HorizontalAlignment="Center" VerticalAlignment="Center">
                            <Image Source="pack://application:,,,/images/logogif.gif" Width="96" Height="96"/>
                            <TextBlock Text="Athena Studios" FontSize="20" FontWeight="Bold" HorizontalAlignment="Center" Margin="0,12,0,0"/>
                            <TextBlock x:Name="LoadingText" Text="Başlatılıyor…" Foreground="{StaticResource TextMutedBrush}" HorizontalAlignment="Center" Margin="0,6,0,0"/>
                        </StackPanel>
                    </Grid>

                    <!-- Ban overlay -->
                    <Grid x:Name="BanOverlay" Background="#F20E1116" Visibility="Collapsed">
                        <StackPanel HorizontalAlignment="Center" VerticalAlignment="Center" MaxWidth="440">
                            <TextBlock Text="⛔" FontSize="56" HorizontalAlignment="Center"/>
                            <TextBlock Text="Erişim Engellendi" FontSize="24" FontWeight="Bold" Foreground="{StaticResource DangerBrush}" HorizontalAlignment="Center" Margin="0,10,0,0"/>
                            <TextBlock x:Name="BanReason" Text="" Foreground="{StaticResource TextBrush}" TextAlignment="Center" TextWrapping="Wrap" Margin="0,12,0,0"/>
                            <Button Content="Kapat" Style="{StaticResource GhostButton}" Width="120" Margin="0,22,0,0" Click="BtnClose_Click"/>
                        </StackPanel>
                    </Grid>
                </Grid>
            </Grid>
        </Grid>
    </Border>
</Window>