MainWindow.xaml

<Window x:Class="Net_Toolkit.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"
        mc:Ignorable="d"
        Title="Net Toolkit"
        Width="480"
        Height="475"
        SizeToContent="Height"
        WindowStartupLocation="CenterScreen"
        WindowStyle="None"
        AllowsTransparency="True"
        Background="Transparent"
        ResizeMode="NoResize"
        FontFamily="Segoe UI"
        PreviewKeyDown="Window_PreviewKeyDown">

    <Window.Resources>
        <SolidColorBrush x:Key="AppBgBrush" Color="#F0F2F5"/>
        <SolidColorBrush x:Key="CardBgBrush" Color="#FFFFFF"/>
        <SolidColorBrush x:Key="TextPrimaryBrush" Color="#212529"/>
        <SolidColorBrush x:Key="TextSecondaryBrush" Color="#495057"/>
        <SolidColorBrush x:Key="BorderDefaultBrush" Color="#DEE2E6"/>
        <SolidColorBrush x:Key="ControlBgBrush" Color="#E9ECEF"/>
        <SolidColorBrush x:Key="AccentBrush" Color="#0D6EFD"/>

        <Style x:Key="GlyphIconStyle" TargetType="TextBlock">
            <Setter Property="FontFamily" Value="Segoe Fluent Icons"/>
            <Setter Property="FontSize" Value="14"/>
            <Setter Property="Foreground" Value="{StaticResource TextSecondaryBrush}"/>
            <Setter Property="VerticalAlignment" Value="Center"/>
            <Setter Property="Margin" Value="0,0,6,0"/>
        </Style>

        <Style TargetType="Border" x:Key="CardContainer">
            <Setter Property="Background" Value="{StaticResource CardBgBrush}"/>
            <Setter Property="CornerRadius" Value="10"/>
            <Setter Property="Padding" Value="16"/>
            <Setter Property="Margin" Value="0,0,0,12"/>
            <Setter Property="BorderBrush" Value="{StaticResource BorderDefaultBrush}"/>
            <Setter Property="BorderThickness" Value="1"/>
        </Style>

        <Style TargetType="TextBlock" x:Key="SectionLabel">
            <Setter Property="FontSize" Value="12"/>
            <Setter Property="FontWeight" Value="SemiBold"/>
            <Setter Property="Foreground" Value="{StaticResource TextSecondaryBrush}"/>
            <Setter Property="Margin" Value="0,0,0,6"/>
        </Style>

        <Style x:Key="ModernTextBox" TargetType="TextBox">
            <Setter Property="Background" Value="White"/>
            <Setter Property="Foreground" Value="{StaticResource TextPrimaryBrush}"/>
            <Setter Property="BorderBrush" Value="{StaticResource BorderDefaultBrush}"/>
            <Setter Property="BorderThickness" Value="1.5"/>
            <Setter Property="Padding" Value="4"/>
            <Setter Property="VerticalContentAlignment" Value="Center"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="TextBox">
                        <Border x:Name="border"
                                Background="{TemplateBinding Background}"
                                BorderBrush="{TemplateBinding BorderBrush}"
                                BorderThickness="{TemplateBinding BorderThickness}"
                                CornerRadius="8">
                            <ScrollViewer x:Name="PART_ContentHost" Margin="{TemplateBinding Padding}"/>
                        </Border>
                        <ControlTemplate.Triggers>
                            <Trigger Property="IsFocused" Value="True">
                                <Setter TargetName="border" Property="BorderBrush" Value="{StaticResource AccentBrush}"/>
                            </Trigger>
                            <Trigger Property="IsEnabled" Value="False">
                                <Setter TargetName="border" Property="Background" Value="{StaticResource ControlBgBrush}"/>
                            </Trigger>
                        </ControlTemplate.Triggers>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>

        <Style x:Key="IpFieldContainer" TargetType="Border">
            <Setter Property="Background" Value="White"/>
            <Setter Property="BorderBrush" Value="{StaticResource BorderDefaultBrush}"/>
            <Setter Property="BorderThickness" Value="1.5"/>
            <Setter Property="CornerRadius" Value="8"/>
            <Setter Property="Padding" Value="6,5"/>
            <Setter Property="HorizontalAlignment" Value="Stretch"/>
            <Style.Triggers>
                <Trigger Property="IsKeyboardFocusWithin" Value="True">
                    <Setter Property="BorderBrush" Value="{StaticResource AccentBrush}"/>
                </Trigger>
            </Style.Triggers>
        </Style>

        <Style x:Key="IpOctetBox" TargetType="TextBox">
            <Setter Property="Background" Value="Transparent"/>
            <Setter Property="Foreground" Value="{StaticResource TextPrimaryBrush}"/>
            <Setter Property="BorderThickness" Value="0"/>
            <Setter Property="Width" Value="30"/>
            <Setter Property="FontFamily" Value="Consolas"/>
            <Setter Property="FontSize" Value="14"/>
            <Setter Property="FontWeight" Value="SemiBold"/>
            <Setter Property="TextAlignment" Value="Center"/>
            <Setter Property="VerticalContentAlignment" Value="Center"/>
            <Setter Property="MaxLength" Value="3"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="TextBox">
                        <ScrollViewer x:Name="PART_ContentHost" Background="Transparent"/>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>

        <Style x:Key="IpDotStyle" TargetType="TextBlock">
            <Setter Property="Text" Value="."/>
            <Setter Property="FontSize" Value="16"/>
            <Setter Property="FontWeight" Value="Bold"/>
            <Setter Property="Foreground" Value="{StaticResource TextSecondaryBrush}"/>
            <Setter Property="Margin" Value="3,0"/>
            <Setter Property="VerticalAlignment" Value="Center"/>
        </Style>

        <Style TargetType="Button" x:Key="ModernButton">
            <Setter Property="Foreground" Value="White"/>
            <Setter Property="FontWeight" Value="SemiBold"/>
            <Setter Property="FontSize" Value="12"/>
            <Setter Property="BorderThickness" Value="0"/>
            <Setter Property="Padding" Value="12,0"/>
            <Setter Property="Cursor" Value="Hand"/>
            <Setter Property="Height" Value="34"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="Button">
                        <Grid>
                            <Border x:Name="border" Background="{TemplateBinding Background}" CornerRadius="8"/>
                            <Border x:Name="hoverOverlay" Background="White" Opacity="0" CornerRadius="8" IsHitTestVisible="False"/>
                            <Border x:Name="pressedOverlay" Background="Black" Opacity="0" CornerRadius="8" IsHitTestVisible="False"/>
                            <ContentPresenter Focusable="False" HorizontalAlignment="Center" VerticalAlignment="Center" Margin="{TemplateBinding Padding}"/>
                        </Grid>
                        <ControlTemplate.Triggers>
                            <Trigger Property="IsMouseOver" Value="True">
                                <Setter TargetName="hoverOverlay" Property="Opacity" Value="0.15"/>
                            </Trigger>
                            <Trigger Property="IsPressed" Value="True">
                                <Setter TargetName="pressedOverlay" Property="Opacity" Value="0.15"/>
                            </Trigger>
                            <Trigger Property="IsEnabled" Value="False">
                                <Setter TargetName="border" Property="Background" Value="{StaticResource ControlBgBrush}"/>
                                <Setter Property="Foreground" Value="{StaticResource TextSecondaryBrush}"/>
                            </Trigger>
                        </ControlTemplate.Triggers>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>

        <Style TargetType="Button" x:Key="IconButton">
            <Setter Property="Background" Value="Transparent"/>
            <Setter Property="BorderThickness" Value="0"/>
            <Setter Property="Cursor" Value="Hand"/>
            <Setter Property="Width" Value="30"/>
            <Setter Property="Height" Value="30"/>
            <Setter Property="Foreground" Value="{StaticResource TextPrimaryBrush}"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="Button">
                        <Border x:Name="border" Background="{TemplateBinding Background}" CornerRadius="6">
                            <ContentPresenter HorizontalAlignment="Center" VerticalAlignment="Center"/>
                        </Border>
                        <ControlTemplate.Triggers>
                            <Trigger Property="IsMouseOver" Value="True">
                                <Setter TargetName="border" Property="Background" Value="#FBE9E9"/>
                                <Setter Property="Foreground" Value="#DC3545"/>
                            </Trigger>
                        </ControlTemplate.Triggers>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>

        <ControlTemplate x:Key="ComboBoxToggleButton" TargetType="ToggleButton">
            <Grid>
                <Grid.ColumnDefinitions>
                    <ColumnDefinition/>
                    <ColumnDefinition Width="26"/>
                </Grid.ColumnDefinitions>
                <Border x:Name="Border" Grid.ColumnSpan="2" CornerRadius="8"
                        Background="{StaticResource ControlBgBrush}"
                        BorderBrush="{StaticResource BorderDefaultBrush}"
                        BorderThickness="1.5"/>
                <Path x:Name="Arrow" Grid.Column="1" Fill="{StaticResource TextSecondaryBrush}"
                      HorizontalAlignment="Center" VerticalAlignment="Center"
                      Data="M0,0 L0,2 L4,6 L8,2 L8,0 L4,4 z"/>
            </Grid>
            <ControlTemplate.Triggers>
                <Trigger Property="IsMouseOver" Value="True">
                    <Setter TargetName="Border" Property="BorderBrush" Value="{StaticResource AccentBrush}"/>
                </Trigger>
            </ControlTemplate.Triggers>
        </ControlTemplate>

        <Style TargetType="ComboBox" x:Key="ModernComboBox">
            <Setter Property="Foreground" Value="{StaticResource TextPrimaryBrush}"/>
            <Setter Property="Background" Value="{StaticResource ControlBgBrush}"/>
            <Setter Property="Cursor" Value="Hand"/>
            <Setter Property="Height" Value="36"/>
            <Setter Property="FontSize" Value="12"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="ComboBox">
                        <Grid>
                            <ToggleButton Name="ToggleButton" Template="{StaticResource ComboBoxToggleButton}" Focusable="False"
                                          IsChecked="{Binding Path=IsDropDownOpen, Mode=TwoWay, RelativeSource={RelativeSource TemplatedParent}}"
                                          ClickMode="Press"/>
                            <ContentPresenter Name="ContentSite" IsHitTestVisible="False" Content="{TemplateBinding SelectionBoxItem}"
                                              Margin="12,0,30,0" VerticalAlignment="Center" HorizontalAlignment="Left"/>
                            <Popup Name="Popup" Placement="Bottom" IsOpen="{TemplateBinding IsDropDownOpen}" AllowsTransparency="True" Focusable="False" PopupAnimation="Slide">
                                <Grid Name="DropDown" SnapsToDevicePixels="True" MinWidth="{TemplateBinding ActualWidth}" MaxHeight="220">
                                    <Border x:Name="DropDownBorder" Background="{StaticResource CardBgBrush}" BorderThickness="1"
                                            BorderBrush="{StaticResource BorderDefaultBrush}" CornerRadius="8" Margin="0,4,0,0">
                                        <Border.Effect>
                                            <DropShadowEffect ShadowDepth="2" BlurRadius="8" Opacity="0.15" Direction="270"/>
                                        </Border.Effect>
                                        <ScrollViewer Margin="0,4" SnapsToDevicePixels="True">
                                            <StackPanel IsItemsHost="True" KeyboardNavigation.DirectionalNavigation="Contained"/>
                                        </ScrollViewer>
                                    </Border>
                                </Grid>
                            </Popup>
                        </Grid>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>

        <Style TargetType="ComboBoxItem" x:Key="ModernComboBoxItem">
            <Setter Property="Foreground" Value="{StaticResource TextPrimaryBrush}"/>
            <Setter Property="Background" Value="Transparent"/>
            <Setter Property="Padding" Value="12,8"/>
            <Setter Property="Cursor" Value="Hand"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="ComboBoxItem">
                        <Border Name="Border" Padding="{TemplateBinding Padding}" Background="{TemplateBinding Background}">
                            <ContentPresenter/>
                        </Border>
                        <ControlTemplate.Triggers>
                            <Trigger Property="IsMouseOver" Value="True">
                                <Setter TargetName="Border" Property="Background" Value="{StaticResource ControlBgBrush}"/>
                            </Trigger>
                            <Trigger Property="IsSelected" Value="True">
                                <Setter TargetName="Border" Property="Background" Value="{StaticResource AccentBrush}"/>
                                <Setter Property="Foreground" Value="White"/>
                            </Trigger>
                        </ControlTemplate.Triggers>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>

        <Style TargetType="ComboBox" BasedOn="{StaticResource ModernComboBox}"/>
        <Style TargetType="ComboBoxItem" BasedOn="{StaticResource ModernComboBoxItem}"/>

        <Style x:Key="ResolveBadge" TargetType="Border">
            <Setter Property="Background" Value="{StaticResource ControlBgBrush}"/>
            <Setter Property="CornerRadius" Value="6"/>
            <Setter Property="Height" Value="22"/>
            <Setter Property="Margin" Value="0,8,0,0"/>
        </Style>

        <Style x:Key="TabButtonBase" TargetType="Button">
            <Setter Property="BorderThickness" Value="0"/>
            <Setter Property="FontSize" Value="12"/>
            <Setter Property="FontWeight" Value="SemiBold"/>
            <Setter Property="Cursor" Value="Hand"/>
            <Setter Property="Height" Value="30"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="Button">
                        <Border Background="{TemplateBinding Background}" CornerRadius="8">
                            <ContentPresenter HorizontalAlignment="Center" VerticalAlignment="Center"/>
                        </Border>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
        <Style x:Key="TabButtonActive" TargetType="Button" BasedOn="{StaticResource TabButtonBase}">
            <Setter Property="Background" Value="#E7F1FF"/>
            <Setter Property="Foreground" Value="{StaticResource AccentBrush}"/>
        </Style>
        <Style x:Key="TabButtonInactive" TargetType="Button" BasedOn="{StaticResource TabButtonBase}">
            <Setter Property="Background" Value="Transparent"/>
            <Setter Property="Foreground" Value="{StaticResource TextSecondaryBrush}"/>
        </Style>

        <Style x:Key="ToolCategoryCard" TargetType="Border">
            <Setter Property="Background" Value="{StaticResource CardBgBrush}"/>
            <Setter Property="BorderBrush" Value="{StaticResource BorderDefaultBrush}"/>
            <Setter Property="BorderThickness" Value="1"/>
            <Setter Property="CornerRadius" Value="10"/>
            <Setter Property="Padding" Value="12,10"/>
        </Style>

        <Style x:Key="ToolCheckBox" TargetType="CheckBox">
            <Setter Property="FontSize" Value="12"/>
            <Setter Property="Foreground" Value="{StaticResource TextPrimaryBrush}"/>
            <Setter Property="Margin" Value="0,4"/>
            <Setter Property="Cursor" Value="Hand"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="CheckBox">
                        <Grid>
                            <Grid.ColumnDefinitions>
                                <ColumnDefinition Width="Auto"/>
                                <ColumnDefinition Width="*"/>
                            </Grid.ColumnDefinitions>
                            <Border x:Name="box" Grid.Column="0" Width="16" Height="16" CornerRadius="4"
                                    BorderBrush="{StaticResource BorderDefaultBrush}" BorderThickness="1.5"
                                    Background="White" VerticalAlignment="Center">
                                <Path x:Name="check" Data="M3,8 L6,11 L13,3" Stroke="White" StrokeThickness="2"
                                      StrokeStartLineCap="Round" StrokeEndLineCap="Round" StrokeLineJoin="Round"
                                      Width="10" Height="8" Stretch="Uniform"
                                      HorizontalAlignment="Center" VerticalAlignment="Center"
                                      Visibility="Collapsed"/>
                            </Border>
                            <ContentPresenter Grid.Column="1" Margin="8,0,0,0" VerticalAlignment="Center"/>
                        </Grid>
                        <ControlTemplate.Triggers>
                            <Trigger Property="IsChecked" Value="True">
                                <Setter TargetName="box" Property="Background" Value="{StaticResource AccentBrush}"/>
                                <Setter TargetName="box" Property="BorderBrush" Value="{StaticResource AccentBrush}"/>
                                <Setter TargetName="check" Property="Visibility" Value="Visible"/>
                            </Trigger>
                            <Trigger Property="IsMouseOver" Value="True">
                                <Setter TargetName="box" Property="BorderBrush" Value="{StaticResource AccentBrush}"/>
                            </Trigger>
                        </ControlTemplate.Triggers>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>

        <Style x:Key="NumberBadge" TargetType="Border">
            <Setter Property="Width" Value="16"/>
            <Setter Property="Height" Value="16"/>
            <Setter Property="CornerRadius" Value="8"/>
            <Setter Property="Background" Value="#E7F1FF"/>
            <Setter Property="Margin" Value="0,0,6,0"/>
        </Style>

        <Style x:Key="LogEntryText" TargetType="TextBlock">
            <Setter Property="FontFamily" Value="Consolas"/>
            <Setter Property="FontSize" Value="11.5"/>
            <Setter Property="Foreground" Value="{StaticResource TextPrimaryBrush}"/>
            <Setter Property="Margin" Value="0,3"/>
            <Setter Property="TextWrapping" Value="Wrap"/>
        </Style>
    </Window.Resources>

    <Border Background="{StaticResource AppBgBrush}" CornerRadius="12" BorderBrush="{StaticResource BorderDefaultBrush}" BorderThickness="1">
        <Border.Effect>
            <DropShadowEffect ShadowDepth="0" BlurRadius="16" Opacity="0.25"/>
        </Border.Effect>
        <Grid>
            <Grid.RowDefinitions>
                <RowDefinition Height="48"/>
                <RowDefinition Height="Auto"/>
                <RowDefinition Height="385"/>
            </Grid.RowDefinitions>

            <Grid Grid.Row="0" Background="Transparent" MouseLeftButtonDown="Window_MouseLeftButtonDown">
                <StackPanel Orientation="Horizontal" VerticalAlignment="Center" Margin="20,0,0,0">
                    <Image Source="icon.ico" Width="30" Height="30" Margin="0,0,10,0"/>
                    <TextBlock Text="Net Toolkit" FontWeight="Bold" FontSize="16"
                           Foreground="{StaticResource AccentBrush}" VerticalAlignment="Center"/>
                </StackPanel>
                <StackPanel Orientation="Horizontal" HorizontalAlignment="Right" VerticalAlignment="Center" Margin="0,0,15,0">
                    <Button x:Name="CloseButton" Style="{StaticResource IconButton}"
                        Content="✕" FontSize="14"
                        HorizontalAlignment="Right" VerticalAlignment="Center"
                        Margin="0,0,0,0"
                        Click="CloseButton_Click"
                        ToolTip="Close"/>
                </StackPanel>
            </Grid>

            <Grid Grid.Row="1" Margin="16,0,16,8">
                <Grid.ColumnDefinitions>
                    <ColumnDefinition Width="*"/>
                    <ColumnDefinition Width="*"/>
                </Grid.ColumnDefinitions>
                <Button x:Name="DnsTabButton" Grid.Column="0" Content="DNS"
                        Style="{StaticResource TabButtonActive}" Margin="0,0,3,0"
                        Click="DnsTabButton_Click"/>
                <Button x:Name="ToolsTabButton" Grid.Column="1" Content="Network tools"
                        Style="{StaticResource TabButtonInactive}" Margin="3,0,0,0"
                        Click="ToolsTabButton_Click"/>
            </Grid>

            <Grid Grid.Row="2" Margin="10,0,10,10">

                <StackPanel x:Name="DnsTabPanel" Visibility="Visible" Margin="0,0,0,0">

                    <Border Style="{StaticResource CardContainer}">
                        <StackPanel>
                            <StackPanel Orientation="Horizontal" Margin="0,0,0,6">
                                <TextBlock Text="&#xEB77;" Style="{StaticResource GlyphIconStyle}"/>
                                <TextBlock Text="Network Adapter" FontSize="12" FontWeight="SemiBold" Foreground="{StaticResource TextSecondaryBrush}"/>
                            </StackPanel>
                            <ComboBox x:Name="SelectNetworkAdapter"
                                  SelectionChanged="AdapterComboBox_SelectionChanged"
                                  DropDownOpened="SelectNetworkAdapter_DropDownOpened"/>
                        </StackPanel>
                    </Border>

                    <Border Style="{StaticResource CardContainer}">
                        <StackPanel>
                            <StackPanel Orientation="Horizontal" Margin="0,0,0,6">
                                <TextBlock Text="&#xE774;" Style="{StaticResource GlyphIconStyle}"/>
                                <TextBlock Text="DNS Provider" FontSize="12" FontWeight="SemiBold" Foreground="{StaticResource TextSecondaryBrush}"/>
                            </StackPanel>
                            <ComboBox x:Name="DnsServerComboBox"
                                  SelectionChanged="DnsServerComboBox_SelectionChanged"/>
                        </StackPanel>
                    </Border>

                    <Border Style="{StaticResource CardContainer}">
                        <Grid>
                            <Grid.ColumnDefinitions>
                                <ColumnDefinition Width="*"/>
                                <ColumnDefinition Width="14"/>
                                <ColumnDefinition Width="*"/>
                            </Grid.ColumnDefinitions>

                            <StackPanel Grid.Column="0">
                                <StackPanel Orientation="Horizontal" Margin="0,0,0,6">
                                    <Border Style="{StaticResource NumberBadge}">
                                        <TextBlock Text="1" FontSize="10" FontWeight="Bold" Foreground="{StaticResource AccentBrush}"
                                               HorizontalAlignment="Center" VerticalAlignment="Center"/>
                                    </Border>
                                    <TextBlock Text="Primary DNS" FontSize="12" FontWeight="SemiBold" Foreground="{StaticResource TextSecondaryBrush}"/>
                                </StackPanel>
                                <Border Style="{StaticResource IpFieldContainer}">
                                    <StackPanel Orientation="Horizontal" HorizontalAlignment="Center">
                                        <TextBox x:Name="PrimaryOctet1" Style="{StaticResource IpOctetBox}"/>
                                        <TextBlock Style="{StaticResource IpDotStyle}"/>
                                        <TextBox x:Name="PrimaryOctet2" Style="{StaticResource IpOctetBox}"/>
                                        <TextBlock Style="{StaticResource IpDotStyle}"/>
                                        <TextBox x:Name="PrimaryOctet3" Style="{StaticResource IpOctetBox}"/>
                                        <TextBlock Style="{StaticResource IpDotStyle}"/>
                                        <TextBox x:Name="PrimaryOctet4" Style="{StaticResource IpOctetBox}"/>
                                    </StackPanel>
                                </Border>
                                <Border Style="{StaticResource ResolveBadge}">
                                    <TextBlock x:Name="PrimaryResolveLabel" Text="Resolve time: --"
                                           FontSize="10.5" Foreground="{StaticResource TextSecondaryBrush}"
                                           HorizontalAlignment="Center" VerticalAlignment="Center"/>
                                </Border>
                            </StackPanel>

                            <StackPanel Grid.Column="2">
                                <StackPanel Orientation="Horizontal" Margin="0,0,0,6">
                                    <Border Style="{StaticResource NumberBadge}">
                                        <TextBlock Text="2" FontSize="10" FontWeight="Bold" Foreground="{StaticResource AccentBrush}"
                                               HorizontalAlignment="Center" VerticalAlignment="Center"/>
                                    </Border>
                                    <TextBlock Text="Secondary DNS" FontSize="12" FontWeight="SemiBold" Foreground="{StaticResource TextSecondaryBrush}"/>
                                </StackPanel>
                                <Border Style="{StaticResource IpFieldContainer}">
                                    <StackPanel Orientation="Horizontal" HorizontalAlignment="Center">
                                        <TextBox x:Name="SecondaryOctet1" Style="{StaticResource IpOctetBox}"/>
                                        <TextBlock Style="{StaticResource IpDotStyle}"/>
                                        <TextBox x:Name="SecondaryOctet2" Style="{StaticResource IpOctetBox}"/>
                                        <TextBlock Style="{StaticResource IpDotStyle}"/>
                                        <TextBox x:Name="SecondaryOctet3" Style="{StaticResource IpOctetBox}"/>
                                        <TextBlock Style="{StaticResource IpDotStyle}"/>
                                        <TextBox x:Name="SecondaryOctet4" Style="{StaticResource IpOctetBox}"/>
                                    </StackPanel>
                                </Border>
                                <Border Style="{StaticResource ResolveBadge}">
                                    <TextBlock x:Name="SecondaryResolveLabel" Text="Resolve time: --"
                                           FontSize="10.5" Foreground="{StaticResource TextSecondaryBrush}"
                                           HorizontalAlignment="Center" VerticalAlignment="Center"/>
                                </Border>
                            </StackPanel>
                        </Grid>
                    </Border>

                    <Grid Margin="0,0,0,0">
                        <Grid.ColumnDefinitions>
                            <ColumnDefinition Width="*"/>
                            <ColumnDefinition Width="*"/>
                            <ColumnDefinition Width="*"/>
                            <ColumnDefinition Width="*"/>
                        </Grid.ColumnDefinitions>

                        <Button x:Name="FastestDnsButton" Grid.Column="0"
                            Content="Fastest DNS" Style="{StaticResource ModernButton}"
                            Background="#198754" Margin="0,0,4,0"
                            Click="FastestDnsButton_Click"
                            ToolTip="Auto-select fastest DNS"/>
                        <Button x:Name="FlushDnsButton" Grid.Column="1"
                            Content="Flush DNS" Style="{StaticResource ModernButton}"
                            Background="#FF9500" Margin="4,0,4,0"
                            Click="FlushDnsButton_Click"
                            ToolTip="Clear DNS cache"/>
                        <Button x:Name="CancelButton" Grid.Column="2"
                            Content="Cancel" Style="{StaticResource ModernButton}"
                            Background="#6C757D" Margin="4,0,4,0"
                            Click="CancelButton_Click"
                            IsEnabled="False"/>
                        <Button x:Name="ApplyButton" Grid.Column="3"
                            Content="Apply" Style="{StaticResource ModernButton}"
                            Background="{StaticResource AccentBrush}" Margin="4,0,0,0"
                            Click="ApplyButton_Click"/>
                    </Grid>
                </StackPanel>

                <Grid x:Name="ToolsTabPanel" Visibility="Collapsed">
                    <Grid.RowDefinitions>
                        <RowDefinition Height="Auto"/>
                        <RowDefinition Height="*"/>
                    </Grid.RowDefinitions>

                    <Grid Grid.Row="0">
                        <Grid.ColumnDefinitions>
                            <ColumnDefinition Width="*"/>
                            <ColumnDefinition Width="8"/>
                            <ColumnDefinition Width="*"/>
                        </Grid.ColumnDefinitions>

                        <Border Grid.Column="0" Style="{StaticResource ToolCategoryCard}">
                            <StackPanel>
                                <TextBlock Text="Connection repair" FontSize="11" FontWeight="SemiBold"
                                    Foreground="{StaticResource TextSecondaryBrush}" Margin="0,0,0,6"/>
                                <CheckBox x:Name="ResetTcpIpCheck" Style="{StaticResource ToolCheckBox}">
                                    <StackPanel Orientation="Horizontal">
                                        <TextBlock Text="&#xF49A;" Style="{StaticResource GlyphIconStyle}"/>
                                        <TextBlock Text="Reset TCP/IP"/>
                                    </StackPanel>
                                </CheckBox>
                                <CheckBox x:Name="RepairWinsockCheck" Style="{StaticResource ToolCheckBox}">
                                    <StackPanel Orientation="Horizontal">
                                        <TextBlock Text="&#xE9F5;" Style="{StaticResource GlyphIconStyle}"/>
                                        <TextBlock Text="Repair Winsock"/>
                                    </StackPanel>
                                </CheckBox>
                                <CheckBox x:Name="RenewIpCheck" Style="{StaticResource ToolCheckBox}">
                                    <StackPanel Orientation="Horizontal">
                                        <TextBlock Text="&#xE895;" Style="{StaticResource GlyphIconStyle}"/>
                                        <TextBlock Text="Renew IP"/>
                                    </StackPanel>
                                </CheckBox>
                                <CheckBox x:Name="FlushArpCheck" Style="{StaticResource ToolCheckBox}">
                                    <StackPanel Orientation="Horizontal">
                                        <TextBlock Text="&#xE74D;" Style="{StaticResource GlyphIconStyle}"/>
                                        <TextBlock Text="Flush ARP cache"/>
                                    </StackPanel>
                                </CheckBox>
                                <CheckBox x:Name="RenewWinsCheck" Style="{StaticResource ToolCheckBox}">
                                    <StackPanel Orientation="Horizontal">
                                        <TextBlock Text="&#xE8FD;" Style="{StaticResource GlyphIconStyle}"/>
                                        <TextBlock Text="Renew WINS registration"/>
                                    </StackPanel>
                                </CheckBox>
                                <Button x:Name="RunRepairButton" Content="Run selected"
                                Style="{StaticResource ModernButton}"
                                Background="{StaticResource AccentBrush}"
                                Margin="0,10,0,0" HorizontalAlignment="Stretch"
                                Click="RunRepairButton_Click"/>
                            </StackPanel>
                        </Border>

                        <Border Grid.Column="2" Style="{StaticResource ToolCategoryCard}">
                            <StackPanel>
                                <TextBlock Text="Advanced Option" FontSize="11" FontWeight="SemiBold"
                                    Foreground="{StaticResource TextSecondaryBrush}" Margin="0,0,0,6"/>
                                <CheckBox x:Name="ResetFirewallCheck" Style="{StaticResource ToolCheckBox}">
                                    <StackPanel Orientation="Horizontal">
                                        <TextBlock Text="&#xEA18;" Style="{StaticResource GlyphIconStyle}"/>
                                        <TextBlock Text="Reset firewall"/>
                                    </StackPanel>
                                </CheckBox>
                                <CheckBox x:Name="ResetProxyCheck" Style="{StaticResource ToolCheckBox}">
                                    <StackPanel Orientation="Horizontal">
                                        <TextBlock Text="&#xE774;" Style="{StaticResource GlyphIconStyle}"/>
                                        <TextBlock Text="Reset proxy config"/>
                                    </StackPanel>
                                </CheckBox>
                                <CheckBox x:Name="RepairSslCheck" Style="{StaticResource ToolCheckBox}">
                                    <StackPanel Orientation="Horizontal">
                                        <TextBlock Text="&#xE72E;" Style="{StaticResource GlyphIconStyle}"/>
                                        <TextBlock Text="Repair SSL / crypto"/>
                                    </StackPanel>
                                </CheckBox>
                                <CheckBox x:Name="RestoreHostsCheck" Style="{StaticResource ToolCheckBox}">
                                    <StackPanel Orientation="Horizontal">
                                        <TextBlock Text="&#xE8A5;" Style="{StaticResource GlyphIconStyle}"/>
                                        <TextBlock Text="Restore hosts file"/>
                                    </StackPanel>
                                </CheckBox>
                                <CheckBox x:Name="NetworkVisibilityCheck" Style="{StaticResource ToolCheckBox}">
                                    <StackPanel Orientation="Horizontal">
                                        <TextBlock Text="&#xE7B3;" Style="{StaticResource GlyphIconStyle}"/>
                                        <TextBlock Text="Network visibility"/>
                                    </StackPanel>
                                </CheckBox>
                                <Button x:Name="RunAdvancedButton" Content="Run selected"
                                Style="{StaticResource ModernButton}"
                                Background="{StaticResource AccentBrush}"
                                Margin="0,10,0,0" HorizontalAlignment="Stretch"
                                Click="RunAdvancedButton_Click"/>
                            </StackPanel>
                        </Border>
                    </Grid>

                    <Border Grid.Row="1" Style="{StaticResource ToolCategoryCard}" Margin="0,10,0,0">
                        <DockPanel LastChildFill="True">
                            <TextBlock DockPanel.Dock="Top" Text="Activity log" FontSize="11" FontWeight="SemiBold"
                                   Foreground="{StaticResource TextSecondaryBrush}" Margin="0,0,0,6"/>
                            <ScrollViewer VerticalScrollBarVisibility="Auto">
                                <ItemsControl x:Name="ToolLogList">
                                    <ItemsControl.ItemTemplate>
                                        <DataTemplate>
                                            <TextBlock Text="{Binding}" Style="{StaticResource LogEntryText}"/>
                                        </DataTemplate>
                                    </ItemsControl.ItemTemplate>
                                </ItemsControl>
                            </ScrollViewer>
                        </DockPanel>
                    </Border>
                </Grid>
            </Grid>
        </Grid>
    </Border>
</Window>