PalladiumWallet/src/App/App.axaml

<Application xmlns="https://github.com/avaloniaui"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             x:Class="PalladiumWallet.App.App"
             xmlns:local="using:PalladiumWallet.App"
             RequestedThemeVariant="Default">
             <!-- "Default" ThemeVariant follows system theme variant. "Dark" or "Light" are other available options. -->

    <Application.DataTemplates>
        <local:ViewLocator/>
    </Application.DataTemplates>

    <!-- Semantic design tokens (colors, radii, brand accent): defined for
         both light/dark variants. See Styles/Theme.axaml. -->
    <Application.Resources>
        <ResourceDictionary>
            <ResourceDictionary.MergedDictionaries>
                <ResourceInclude Source="/Styles/Theme.axaml"/>
            </ResourceDictionary.MergedDictionaries>
        </ResourceDictionary>
    </Application.Resources>

    <Application.Styles>
        <FluentTheme />
        <!-- Control refinements and reusable classes (on top of Fluent) -->
        <StyleInclude Source="/Styles/Controls.axaml"/>
    </Application.Styles>
</Application>