Change TextBox WaterMark Foreground and change the background on focus

[MarkoShenodaa]

  <Style Selector="TextBlock">
    <Setter Property="FontSize" Value="{Binding SubtitleFontSize}" />
    <Setter Property="Foreground" Value="{Binding MainColor}" />
</Style>

<Style Selector="TextBox">
    <Setter Property="FontSize" Value="{Binding SubtitleFontSize}" />
    <Setter Property="Foreground" Value="{Binding MainColor}" />
    <Setter Property="BorderBrush" Value="White"/>
</Style>

<Style Selector="TextBox:focus">
    <Setter Property="Foreground" Value="{Binding MainColor}" />
    <Setter Property="Background" Value="{Binding MainColor}" />
    <Setter Property="BorderBrush" Value="White" />
</Style>

Style Selector="TextBox" This style change the foreground for watermark

Style Selector="TextBox:focus" this style change the input text foreground but not the watermark it go back to the theme and the background not effected how do i change that also the border go back to the theme