JavaFX 2.0 :: Make TextArea Background Gradient Fixed

I have a TextArea and want to set a linear-gradient as background, which works fine:
 
.text-area {
    -fx-background-color: linear-gradient(to bottom, red 0%, blue 100%);
}
 
The problem is that if the TextArea contains much text (and long scrollbars) it is nearly only red. Only if you scroll down to the bottom, it becomes blue.
 
I want the red-blue gradient always look the same, no matter how much text there is.
 
In HTML there's something like background-attachment: fixed, which would do the trick, but not so in JavaFX.
 
Can I achieve it nonetheless. Preferably without any ugly workarounds, like a transparent TextArea within another Pane where the wrapping Pane has the gradient.