Catalog/CatalogLite/App.axaml

<Application xmlns="https://github.com/avaloniaui"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             x:Class="CatalogLite.App">
    <Application.Resources>
        <ResourceDictionary>
            <ResourceDictionary.ThemeDictionaries>
                <ResourceDictionary x:Key="Light">
                    <SolidColorBrush x:Key="AppBackgroundBrush">#F4F6F8</SolidColorBrush>
                    <SolidColorBrush x:Key="PanelBackgroundBrush">#FFFFFF</SolidColorBrush>
                    <SolidColorBrush x:Key="BorderMutedBrush">#D4DAE2</SolidColorBrush>
                    <SolidColorBrush x:Key="AccentBrush">#1F7A5A</SolidColorBrush>
                </ResourceDictionary>
                <ResourceDictionary x:Key="Dark">
                    <SolidColorBrush x:Key="AppBackgroundBrush">#20242A</SolidColorBrush>
                    <SolidColorBrush x:Key="PanelBackgroundBrush">#2A3038</SolidColorBrush>
                    <SolidColorBrush x:Key="BorderMutedBrush">#46505C</SolidColorBrush>
                    <SolidColorBrush x:Key="AccentBrush">#4FB286</SolidColorBrush>
                </ResourceDictionary>
            </ResourceDictionary.ThemeDictionaries>
        </ResourceDictionary>
    </Application.Resources>

    <Application.Styles>
        <FluentTheme DensityStyle="Compact" />
        <Style Selector="Window">
            <Setter Property="Background" Value="{DynamicResource AppBackgroundBrush}" />
        </Style>
        <Style Selector="Button">
            <Setter Property="MinHeight" Value="34" />
            <Setter Property="Padding" Value="12,5" />
        </Style>
        <Style Selector="TextBox">
            <Setter Property="MinHeight" Value="34" />
            <Setter Property="Padding" Value="8,5" />
        </Style>
        <Style Selector="ProgressBar">
            <Setter Property="MinHeight" Value="18" />
        </Style>
        <StyleInclude Source="avares://IconPacks.Avalonia.Material/Material.axaml" />
    </Application.Styles>
</Application>