A DESCRIPTION OF THE PROBLEM :
CSS animation allows to create different powerful features. That's why animation is often used. For example, question about CSS animation in JavaFX on StackOverflow (https://stackoverflow.com/questions/17676274/how-to-make-an-animation-with-css-in-javafx) was viewed 25k times.

However, JavaFX currently doesn't support animation using only CSS. So, I suggest to add such feature.