More properties

src/commonMain/kotlin/nl/astraeus/css/properties/Measurement.kt

@@ -1,7 +1,5 @@
 package nl.astraeus.css.properties
 
-import kotlin.time.AbstractDoubleTimeSource
-
 open class Measurement(
     value: String
 ) : CssProperty(value) {
@@ -11,7 +9,7 @@ open class Measurement(
         fun initial() = Measurement("initial")
         fun inherit() = Measurement("inherit")
         fun normal() = Measurement("normal")
-        fun px(nr: Int) = Measurement("${nr}px")
+        fun px(nr: Int) = if (nr == 0) { Measurement("0") } else { Measurement("${nr}px") }
         fun px(nr: Double) = Measurement("${nr}px")
         fun em(nr: Int) = Measurement("${nr}em")
         fun em(nr: Double) = Measurement("${nr}em")
@@ -30,3 +28,11 @@ fun Int.em(): Measurement = Measurement.em(this)
 fun Double.em(): Measurement = Measurement.em(this)
 fun Int.perc(): Measurement = Measurement.perc(this)
 fun Double.perc(): Measurement = Measurement.perc(this)
+
+open class LineHeight(value: String) : CssProperty(value) {
+    companion object {
+        fun normal() = LineHeight("normal")
+        fun initial() = LineHeight("initial")
+        fun inherit() = LineHeight("inherit")
+    }
+}