App.xaml

<Application x:Class="OpSy_Cryptor.App" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="clr-namespace:OpSy_Cryptor" StartupUri="windows/LoginWindow.xaml">
    <Application.Resources>
        <Style TargetType="Button" x:Key="CryptorButton">
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="{x:Type Button}">
                        <Grid Background="{TemplateBinding Background}">
                            <ContentPresenter x:Name="MyContentPresenter" Content="{TemplateBinding Content}" HorizontalAlignment="Center" VerticalAlignment="Center" />
                        </Grid>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>

            <Setter Property="Effect">
                <Setter.Value>
                    <DropShadowEffect />
                </Setter.Value>
            </Setter>

            <Setter Property="Background" Value="#FF970000" />
            <Setter Property="Foreground" Value="White" />
            <Setter Property="BorderBrush" Value="Black" />
            <Setter Property="BorderThickness" Value="0 1 0 1" />
            <Setter Property="Padding" Value="0 -5 0 0" />
            <Setter Property="FontSize" Value="16" />
            <Setter Property="FontFamily" Value="Bahnschrift Light" />

            <Style.Triggers>
                <Trigger Property="IsEnabled" Value="False">
                    <Setter Property="Background" Value="#FF641A22" />
                    <Setter Property="Foreground" Value="Black" />
                </Trigger>
                <Trigger Property="IsMouseOver" Value="True">
                    <Setter Property="Background" Value="Red" />
                </Trigger>
            </Style.Triggers>
        </Style>
    </Application.Resources>
</Application>