PalladiumWallet/src/App/Styles/Theme.axaml

<ResourceDictionary xmlns="https://github.com/avaloniaui"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    <!-- ============================================================
         Palladium wallet design tokens.
         Identity: cobalt blue (trust) + green (money/positive),
         derived from the logo. "Clean fintech" style.

         All colors are SEMANTIC (role, not name): components
         must never use inline hex but these brushes. Defined for
         both variants (light/dark) via ThemeDictionaries, so
         the app follows the system theme with no further configuration.
         ============================================================ -->

    <ResourceDictionary.ThemeDictionaries>

        <!-- ============ LIGHT THEME ============ -->
        <ResourceDictionary x:Key="Light">
            <!-- Surfaces -->
            <SolidColorBrush x:Key="AppBackgroundBrush" Color="#F1F5F9"/>     <!-- slate-100 -->
            <SolidColorBrush x:Key="SurfaceBrush"        Color="#FFFFFF"/>
            <SolidColorBrush x:Key="SurfaceAltBrush"     Color="#F8FAFC"/>     <!-- slate-50 -->
            <SolidColorBrush x:Key="OverlayCardBrush"    Color="#FFFFFF"/>
            <SolidColorBrush x:Key="ScrimBrush"          Color="#66000000"/>   <!-- 40% -->
            <!-- Borders and separators -->
            <SolidColorBrush x:Key="BorderSubtleBrush"   Color="#E2E8F0"/>     <!-- slate-200 -->
            <SolidColorBrush x:Key="BorderStrongBrush"   Color="#CBD5E1"/>     <!-- slate-300 -->
            <!-- Text -->
            <SolidColorBrush x:Key="TextPrimaryBrush"    Color="#0F172A"/>     <!-- slate-900 -->
            <SolidColorBrush x:Key="TextSecondaryBrush"  Color="#475569"/>     <!-- slate-600 -->
            <SolidColorBrush x:Key="TextMutedBrush"      Color="#94A3B8"/>     <!-- slate-400 -->
            <!-- Brand / state -->
            <SolidColorBrush x:Key="PrimaryBrush"        Color="#2563EB"/>     <!-- blue-600 -->
            <SolidColorBrush x:Key="PrimaryHoverBrush"   Color="#1D4ED8"/>     <!-- blue-700 -->
            <SolidColorBrush x:Key="OnPrimaryBrush"      Color="#FFFFFF"/>
            <SolidColorBrush x:Key="PrimarySoftBrush"    Color="#EFF6FF"/>     <!-- blue-50 -->
            <SolidColorBrush x:Key="SuccessBrush"        Color="#16A34A"/>     <!-- green-600 -->
            <SolidColorBrush x:Key="WarningBrush"        Color="#D97706"/>     <!-- amber-600 -->
            <SolidColorBrush x:Key="DangerBrush"         Color="#DC2626"/>     <!-- red-600 -->
            <!-- Hero gradient of the balance card: blue → indigo -->
            <LinearGradientBrush x:Key="BalanceGradientBrush" StartPoint="0%,0%" EndPoint="100%,100%">
                <GradientStop Offset="0" Color="#2563EB"/>
                <GradientStop Offset="1" Color="#4F46E5"/>
            </LinearGradientBrush>
        </ResourceDictionary>

        <!-- ============ DARK THEME ============ -->
        <ResourceDictionary x:Key="Dark">
            <!-- Surfaces -->
            <SolidColorBrush x:Key="AppBackgroundBrush" Color="#0F172A"/>      <!-- slate-900 -->
            <SolidColorBrush x:Key="SurfaceBrush"        Color="#1E293B"/>     <!-- slate-800 -->
            <SolidColorBrush x:Key="SurfaceAltBrush"     Color="#273449"/>
            <SolidColorBrush x:Key="OverlayCardBrush"    Color="#1E293B"/>
            <SolidColorBrush x:Key="ScrimBrush"          Color="#99000000"/>   <!-- 60% -->
            <!-- Borders and separators -->
            <SolidColorBrush x:Key="BorderSubtleBrush"   Color="#334155"/>     <!-- slate-700 -->
            <SolidColorBrush x:Key="BorderStrongBrush"   Color="#475569"/>     <!-- slate-600 -->
            <!-- Text -->
            <SolidColorBrush x:Key="TextPrimaryBrush"    Color="#F8FAFC"/>     <!-- slate-50 -->
            <SolidColorBrush x:Key="TextSecondaryBrush"  Color="#94A3B8"/>     <!-- slate-400 -->
            <SolidColorBrush x:Key="TextMutedBrush"      Color="#64748B"/>     <!-- slate-500 -->
            <!-- Brand / state (brighter tones on dark background) -->
            <SolidColorBrush x:Key="PrimaryBrush"        Color="#3B82F6"/>     <!-- blue-500 -->
            <SolidColorBrush x:Key="PrimaryHoverBrush"   Color="#60A5FA"/>     <!-- blue-400 -->
            <SolidColorBrush x:Key="OnPrimaryBrush"      Color="#0B1120"/>
            <SolidColorBrush x:Key="PrimarySoftBrush"    Color="#1E3A8A"/>     <!-- blue-900 -->
            <SolidColorBrush x:Key="SuccessBrush"        Color="#22C55E"/>     <!-- green-500 -->
            <SolidColorBrush x:Key="WarningBrush"        Color="#F59E0B"/>     <!-- amber-500 -->
            <SolidColorBrush x:Key="DangerBrush"         Color="#EF4444"/>     <!-- red-500 -->
            <!-- Hero gradient of the balance card: blue → indigo (deeper tones) -->
            <LinearGradientBrush x:Key="BalanceGradientBrush" StartPoint="0%,0%" EndPoint="100%,100%">
                <GradientStop Offset="0" Color="#1D4ED8"/>
                <GradientStop Offset="1" Color="#4338CA"/>
            </LinearGradientBrush>
        </ResourceDictionary>

    </ResourceDictionary.ThemeDictionaries>

    <!-- ============================================================
         Override of the Fluent accent → brand blue. Recolors
         consistently the controls that read SystemAccentColor (accent
         buttons, selections, tab indicator, focus) without retemplating anything.
         Variant-independent: #2563EB works on light and dark.
         ============================================================ -->
    <Color x:Key="SystemAccentColor">#2563EB</Color>
    <Color x:Key="SystemAccentColorDark1">#1D4ED8</Color>
    <Color x:Key="SystemAccentColorDark2">#1E40AF</Color>
    <Color x:Key="SystemAccentColorDark3">#1E3A8A</Color>
    <Color x:Key="SystemAccentColorLight1">#3B82F6</Color>
    <Color x:Key="SystemAccentColorLight2">#60A5FA</Color>
    <Color x:Key="SystemAccentColorLight3">#93C5FD</Color>

    <!-- Global Fluent control corner radii: rounds buttons, inputs, combos,
         and lists uniformly without retemplating each control. -->
    <CornerRadius x:Key="ControlCornerRadius">8</CornerRadius>
    <CornerRadius x:Key="OverlayCornerRadius">12</CornerRadius>
</ResourceDictionary>