Revert everything back. Mission failed.

Wino.Mail/AppThemes/Acrylic.xaml

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+<ResourceDictionary
+    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:local="using:Microsoft.UI.Xaml.Media"
+    xmlns:xaml="using:Windows.UI.Xaml">
+
+    <x:String x:Key="ThemeName">Acrylic</x:String>
+    <x:Boolean x:Key="UseMica">False</x:Boolean>
+
+    <SolidColorBrush x:Key="AppBarBackgroundColor">Transparent</SolidColorBrush>
+
+    <!--  Acrylic Template  -->
+    <ResourceDictionary.ThemeDictionaries>
+        <ResourceDictionary x:Name="Light">
+            <!--  Reading Page Date/Name Group Header Background  -->
+            <SolidColorBrush x:Key="MailListHeaderBackgroundColor">#ecf0f1</SolidColorBrush>
+
+            <local:AcrylicBrush
+                x:Key="WinoApplicationBackgroundColor"
+                BackgroundSource="HostBackdrop"
+                FallbackColor="#F9F9F9"
+                TintColor="#FCFCFC"
+                TintOpacity="0.75" />
+        </ResourceDictionary>
+
+        <ResourceDictionary x:Name="Dark">
+            <SolidColorBrush x:Key="MailListHeaderBackgroundColor">#2C2C2C</SolidColorBrush>
+
+            <local:AcrylicBrush
+                x:Key="WinoApplicationBackgroundColor"
+                BackgroundSource="HostBackdrop"
+                FallbackColor="#2C2C2C"
+                TintColor="#2C2C2C"
+                TintOpacity="0.30" />
+        </ResourceDictionary>
+    </ResourceDictionary.ThemeDictionaries>
+</ResourceDictionary>