MainWindow.xaml

<Window x:Class="TweakHub.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:TweakHub"
        xmlns:ui="http://schemas.modernwpf.com/2019"
        mc:Ignorable="d"
        Title="TweakHub - Windows 11 Performance Optimizer"
        Height="900" Width="1400"
        MinHeight="700" MinWidth="1200"
        WindowStartupLocation="CenterScreen"
        Icon="ico.ico"
        Background="{DynamicResource SystemControlBackgroundBaseLowBrush}">

    <Window.Resources>
        <Style x:Key="SidebarButtonStyle" TargetType="Button">
            <Setter Property="Background" Value="Transparent"/>
            <Setter Property="BorderThickness" Value="0"/>
            <Setter Property="Padding" Value="16,12"/>
            <Setter Property="HorizontalContentAlignment" Value="Left"/>
            <Setter Property="Margin" Value="0,2"/>
            <Setter Property="FontSize" Value="14"/>
            <Setter Property="Foreground" Value="{DynamicResource SystemControlForegroundBaseHighBrush}"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="Button">
                        <Border x:Name="Border"
                                Background="{TemplateBinding Background}"
                                CornerRadius="6"
                                Margin="8,0">
                            <ContentPresenter HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
                                              VerticalAlignment="Center"
                                              Margin="{TemplateBinding Padding}"/>
                        </Border>
                        <ControlTemplate.Triggers>
                            <Trigger Property="IsMouseOver" Value="True">
                                <Setter TargetName="Border" Property="Background"
                                        Value="{DynamicResource SystemControlBackgroundListLowBrush}"/>
                            </Trigger>
                            <Trigger Property="IsPressed" Value="True">
                                <Setter TargetName="Border" Property="Background"
                                        Value="{DynamicResource SystemControlBackgroundListMediumBrush}"/>
                            </Trigger>
                        </ControlTemplate.Triggers>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>

        <Style x:Key="ActiveSidebarButtonStyle" TargetType="Button" BasedOn="{StaticResource SidebarButtonStyle}">
            <Setter Property="Background" Value="Transparent"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="Button">
                        <Border x:Name="Border"
                                Background="{TemplateBinding Background}"
                                BorderBrush="{StaticResource AccentBrush}"
                                BorderThickness="1.5"
                                CornerRadius="8"
                                Margin="8,0">
                            <ContentPresenter HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
                                            VerticalAlignment="Center"
                                            Margin="{TemplateBinding Padding}"/>
                        </Border>
                        <ControlTemplate.Triggers>
                            <Trigger Property="IsMouseOver" Value="True">
                                <Setter TargetName="Border" Property="Background" Value="{DynamicResource SystemControlBackgroundListLowBrush}"/>
                            </Trigger>
                            <Trigger Property="IsPressed" Value="True">
                                <Setter TargetName="Border" Property="Background" Value="{DynamicResource SystemControlBackgroundListMediumBrush}"/>
                            </Trigger>
                        </ControlTemplate.Triggers>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
    </Window.Resources>

    <Grid>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="280"/>
            <ColumnDefinition Width="*"/>
        </Grid.ColumnDefinitions>

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

                <!-- Header -->
                <StackPanel Grid.Row="0" Margin="20,24,20,20">
                    <StackPanel Orientation="Horizontal" Margin="0,0,0,8">
                        <!-- Modern Logo Design -->
                        <Border Width="32" Height="32" CornerRadius="8" Background="#1A1A1A" BorderBrush="{StaticResource AccentBrush}" BorderThickness="2">
                            <TextBlock Text="TH" FontSize="14" FontWeight="Bold"
                                       Foreground="{StaticResource AccentBrush}" HorizontalAlignment="Center"
                                       VerticalAlignment="Center"/>
                        </Border>
                        <TextBlock Text="TweakHub" FontSize="20" FontWeight="SemiBold"
                                   Margin="12,0,0,0" VerticalAlignment="Center"
                                   Foreground="{DynamicResource SystemControlForegroundBaseHighBrush}"/>
                    </StackPanel>
                    <TextBlock Text="Powered by Prime Build"
                               FontSize="12"
                               Foreground="{DynamicResource SystemControlForegroundBaseMediumBrush}"/>
                </StackPanel>

                <!-- Navigation -->
                <ScrollViewer Grid.Row="1" VerticalScrollBarVisibility="Auto">
                    <StackPanel Margin="12,0">
                        <Button x:Name="RegistryTweaksButton" Style="{StaticResource SidebarButtonStyle}"
                                Click="RegistryTweaksButton_Click">
                            <Grid>
                                <Grid.ColumnDefinitions>
                                    <ColumnDefinition Width="*"/>
                                    <ColumnDefinition Width="Auto"/>
                                </Grid.ColumnDefinitions>

                                <StackPanel Grid.Column="0" Orientation="Horizontal">
                                    <TextBlock Text="⚡" FontSize="16" Margin="0,0,12,0"
                                               Foreground="{DynamicResource IconBrush}"/>
                                    <TextBlock Text="Registry Tweaks"/>
                                </StackPanel>
                                <!-- Badge indicator -->
                                <Border x:Name="RegistryTweaksBadge" 
                                        Grid.Column="1"
                                        Width="18" Height="18" 
                                        CornerRadius="9" 
                                        Background="{StaticResource AccentBrush}"
                                        VerticalAlignment="Center"
                                        Margin="10,0,0,0"
                                        Visibility="Collapsed">
                                    <TextBlock x:Name="RegistryTweaksBadgeText" 
                                               Text="0" 
                                               FontSize="10" 
                                               FontWeight="Bold"
                                               Foreground="White"
                                               HorizontalAlignment="Center"
                                               VerticalAlignment="Center"/>
                                </Border>
                            </Grid>
                        </Button>

                        <Button x:Name="ExternalToolsButton" Style="{StaticResource SidebarButtonStyle}"
                                Click="ExternalToolsButton_Click">
                            <StackPanel Orientation="Horizontal">
                                <TextBlock Text="🔧" FontSize="16" Margin="0,0,12,0"
                                           Foreground="{DynamicResource IconBrush}"/>
                                <TextBlock Text="External Tools"/>
                            </StackPanel>
                        </Button>

                        <Button x:Name="AutomatedScriptsButton" Style="{StaticResource SidebarButtonStyle}"
                                Click="AutomatedScriptsButton_Click">
                            <StackPanel Orientation="Horizontal">
                                <TextBlock Text="🤖" FontSize="16" Margin="0,0,12,0"
                                           Foreground="{DynamicResource IconBrush}"/>
                                <TextBlock Text="Automated Scripts"/>
                            </StackPanel>
                        </Button>

                        <Button x:Name="QuickAccessButton" Style="{StaticResource SidebarButtonStyle}"
                                Click="QuickAccessButton_Click">
                            <StackPanel Orientation="Horizontal">
                                <TextBlock Text="🚀" FontSize="16" Margin="0,0,12,0"
                                           Foreground="{DynamicResource IconBrush}"/>
                                <TextBlock Text="Quick Access"/>
                            </StackPanel>
                        </Button>

                        <Button x:Name="AboutButton" Style="{StaticResource SidebarButtonStyle}"
                                Click="AboutButton_Click">
                            <StackPanel Orientation="Horizontal">
                                <TextBlock Text="ℹ️" FontSize="16" Margin="0,0,12,0"
                                           Foreground="{DynamicResource IconBrush}"/>
                                <TextBlock Text="About"/>
                            </StackPanel>
                        </Button>
                    </StackPanel>
                </ScrollViewer>

                <!-- Footer -->
                <StackPanel Grid.Row="2" Margin="20,12,20,20">
                    <Separator Margin="0,0,0,12"/>
                    <Button x:Name="ThemeToggleButton" Style="{StaticResource SidebarButtonStyle}"
                            Click="ThemeToggleButton_Click">
                        <StackPanel Orientation="Horizontal">
                            <TextBlock x:Name="ThemeIcon" Text="🌙" FontSize="16" Margin="0,0,12,0"
                                       Foreground="{DynamicResource IconBrush}"/>
                            <TextBlock x:Name="ThemeText" Text="Dark Theme"/>
                        </StackPanel>
                    </Button>
                </StackPanel>
            </Grid>
        </Border>

        <!-- Main Content -->
        <Grid Grid.Column="1" Background="{DynamicResource SystemControlBackgroundBaseLowBrush}">
            <Frame x:Name="MainFrame" NavigationUIVisibility="Hidden"
                   Background="{DynamicResource SystemControlBackgroundBaseLowBrush}"/>
        </Grid>
    </Grid>
</Window>