Using fonts in tornadofx using type-safe css

FontApp.kt

import javafx.geometry.Pos
import javafx.scene.text.FontPosture
import javafx.scene.text.FontWeight
import javafx.scene.text.TextAlignment

fun main() {
    launch<FontApp>()
}

class FontApp : App(FontView::class, Styles::class)

class FontView : View() {

    override val root = vbox {
        stackpane {
            addClass(Styles.headerText)
            label("I am some header font")
        }
        text {
            addClass(Styles.quoteText)
            wrappingWidth = 400.0
            text = "I am some important quote " +
                    "I am some important quote " +
                    "I am some important quote " +
                    "I am some important quote " +
                    "I am some important...."
        }
        text("I am some normal font")
    }
}

class Styles : Stylesheet() {

    private val poppinsBlack = loadFont("/font/Poppins-Black.ttf", 12)!!
    private val poppinsBlackItalic = loadFont("/font/Poppins-BlackItalic.ttf", 12)!!
    private val poppinsBold = loadFont("/font/Poppins-Bold.ttf", 12)!!
    private val poppinsBoldItalic = loadFont("/font/Poppins-BoldItalic.ttf", 12)!!
    private val poppinsExtraBold = loadFont("/font/Poppins-ExtraBold.ttf", 12)!!
    private val poppinsExtraBoldItalic = loadFont("/font/Poppins-ExtraBoldItalic.ttf", 12)!!
    private val poppinsExtraLight = loadFont("/font/Poppins-ExtraLight.ttf", 12)!!
    private val poppinsExtraLightItalic = loadFont("/font/Poppins-ExtraLightItalic.ttf", 12)!!
    private val poppinsItalic = loadFont("/font/Poppins-Italic.ttf", 12)!!
    private val poppinsLight = loadFont("/font/Poppins-Light.ttf", 12)!!
    private val poppinsLightItalic = loadFont("/font/Poppins-LightItalic.ttf", 12)!!
    private val poppinsMedium = loadFont("/font/Poppins-Medium.ttf", 12)!!
    private val poppinsMediumItalic = loadFont("/font/Poppins-MediumItalic.ttf", 12)!!
    private val poppinsReg = loadFont("/font/Poppins-Regular.ttf", 12)!!
    private val poppinsSemiBold = loadFont("/font/Poppins-SemiBold.ttf", 12)!!
    private val poppinsSemiBoldItalic = loadFont("/font/Poppins-SemiBoldItalic.ttf", 12)!!
    private val poppinsThin = loadFont("/font/Poppins-Thin.ttf", 12)!!
    private val poppinsThinItalic = loadFont("/font/Poppins-ThinItalic.ttf", 12)!!

    companion object {
        val normalText by cssclass()
        val quoteText by cssclass()
        val headerText by cssclass()
    }

    init {
        //Families
        val poppins = mixin { fontFamily = "Poppins" }

        // Font Weights
        // We use fontFamily here instead of FontWeight to get around this bug:
        // https://edencoding.com/resources/css_properties/fx-font-weight/
        val black = mixin { fontFamily = "Poppins Black" }
        val extraBold = mixin { fontFamily = "Poppins ExtraBold" }
        val bold = mixin { fontFamily = "Poppins Bold" }
        val semiBold = mixin { fontFamily = "Poppins SemiBold" }
        val medium = mixin { fontFamily = "Poppins Medium" }
        val regular = mixin { fontFamily = "Poppins Regular" }
        val light = mixin { fontFamily = "Poppins Light" }
        val extraLight = mixin { fontFamily = "Poppins ExtraLight" }
        val thin = mixin { fontFamily = "Poppins Thin" }

        // Font Postures
        val normalPosture = mixin { fontStyle = FontPosture.REGULAR }
        val italic = mixin { fontStyle = FontPosture.ITALIC }

        // Font Sizes
        val small = mixin { fontSize = 12.px }
        val normalSize = mixin { fontSize = 16.px }
        val large = mixin { fontSize = 28.px }

        // Alignments
        val rightAlign = mixin { textAlignment = TextAlignment.RIGHT }

        root { +poppins; +normalPosture; +normalSize }
        quoteText {  +light; +italic; +small; +rightAlign }
        headerText { +bold; +large; alignment = Pos.CENTER }
    }
}