Flow.Launcher/Flow.Launcher.Avalonia/MainWindow.axaml

<Window xmlns="https://github.com/avaloniaui"
        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="using:Flow.Launcher.Avalonia"
        xmlns:views="using:Flow.Launcher.Avalonia.Views"
        xmlns:vm="using:Flow.Launcher.Avalonia.ViewModel"
        xmlns:converters="using:Flow.Launcher.Avalonia.Converters"
        xmlns:i18n="using:Flow.Launcher.Avalonia.Resource"
        mc:Ignorable="d" d:DesignWidth="600" d:DesignHeight="400"
        x:Class="Flow.Launcher.Avalonia.MainWindow"
        x:DataType="vm:MainViewModel"
        x:Name="FlowMainWindow"
        Title="Flow Launcher"
        Width="580"
        MinWidth="400"
        MinHeight="30"
        WindowStartupLocation="CenterScreen"
        CanResize="True"
        ShowInTaskbar="False"
        Topmost="True"
        SystemDecorations="None"
        TransparencyLevelHint="AcrylicBlur"
        Background="Transparent"
        ExtendClientAreaToDecorationsHint="True"
        ExtendClientAreaChromeHints="NoChrome"
        SizeToContent="Height"
        IsVisible="{Binding MainWindowVisibility, Mode=TwoWay}">

    <Window.Resources>
        <converters:BoolToIsVisibleConverter x:Key="BoolToVisibilityConverter" />
    </Window.Resources>

    <Window.KeyBindings>
        <KeyBinding Gesture="Escape" Command="{Binding EscCommand}" />
        <KeyBinding Gesture="Enter" Command="{Binding OpenResultCommand}" />
        <KeyBinding Gesture="Down" Command="{Binding SelectNextItemCommand}" />
        <KeyBinding Gesture="Up" Command="{Binding SelectPrevItemCommand}" />
        <KeyBinding Gesture="Shift+Enter" Command="{Binding LoadContextMenuCommand}" />
        <KeyBinding Gesture="Ctrl+OemComma" Command="{Binding OpenSettingsCommand}" />
        <KeyBinding Gesture="F1" Command="{Binding TogglePreviewCommand}" />
    </Window.KeyBindings>

    <!-- Main container with rounded corners and background -->
    <Border Name="WindowBorder"
            Classes="windowBorder"
            PointerPressed="OnWindowBorderPointerPressed">
        <StackPanel Orientation="Vertical">
            
            <!-- Query Box Area -->
            <Grid Name="QueryBoxArea">
                <Border Name="QueryBoxBg" Classes="queryBoxBg" MinHeight="30">
                        <!-- Main Query Text Box -->
                        <TextBox Name="QueryTextBox"
                                 Classes="queryBox"
                                 Text="{Binding QueryText, Mode=TwoWay}"
                                 Watermark="{i18n:Localize queryTextBoxPlaceholder, Fallback='Type here to search'}"
                                 AcceptsReturn="False"
                                 TextWrapping="NoWrap" />
                </Border>

                <!-- Search Icon -->
                <Canvas Name="SearchIconCanvas" 
                        Classes="searchIconPosition"
                        HorizontalAlignment="Right">
                    <Path Name="SearchIcon"
                          Classes="searchIcon"
                          Data="{DynamicResource SearchIconGeometry}"
                          Stretch="Uniform" />
                </Canvas>

                <!-- Progress/Loading indicator -->
                <ProgressBar Name="ProgressBar"
                             Classes="pendingLine"
                             IsIndeterminate="True"
                             IsVisible="{Binding IsQueryRunning}"
                             VerticalAlignment="Bottom"
                             HorizontalAlignment="Stretch"
                             Height="2"
                             Margin="12,0,12,0" />
            </Grid>

            <!-- Separator between query and results -->
            <Rectangle Name="MiddleSeparator"
                       Classes="separator"
                       IsVisible="{Binding ShowResultsArea}" />

            <!-- Results Area -->
            <Border Name="ResultAreaBorder" Classes="resultAreaBorder"
                    IsVisible="{Binding ShowResultsArea}">
                <Grid Name="ResultPreviewArea">
                    <Grid.ColumnDefinitions>
                        <ColumnDefinition Width="*" MinWidth="80" />
                        <ColumnDefinition Width="Auto" />
                        <ColumnDefinition Width="Auto" />
                    </Grid.ColumnDefinitions>

                    <!-- Result List (visible when in Results view) -->
                    <StackPanel Name="ResultArea" Grid.Column="0"
                                IsVisible="{Binding IsResultsViewActive}">
                        <views:ResultListBox Name="ResultListBox"
                                             DataContext="{Binding Results}" />
                    </StackPanel>

                    <!-- Context Menu List (visible when in ContextMenu view) -->
                    <StackPanel Name="ContextMenuArea" Grid.Column="0"
                                IsVisible="{Binding IsContextMenuViewActive}">
                        <views:ResultListBox Name="ContextMenuListBox"
                                             DataContext="{Binding ContextMenu}" />
                    </StackPanel>

                    <!-- Preview Panel Separator -->
                    <GridSplitter Name="PreviewSplitter"
                                  Grid.Column="1"
                                  Width="5"
                                  Background="Transparent"
                                  IsVisible="{Binding IsPreviewOn}" />

                    <!-- Preview Panel -->
                    <Border Name="PreviewPanelContainer"
                            Grid.Column="2"
                            Width="300"
                            IsVisible="{Binding IsPreviewOn}">
                        <views:PreviewPanel DataContext="{Binding PreviewSelectedItem}" />
                    </Border>
                </Grid>
            </Border>
        </StackPanel>
    </Border>
</Window>