I don't know anything about RubyMotion or Pixate, but can we also size and position the buttons in the view with CSS? For example, instead of writing all the U

I don't know anything about RubyMotion or Pixate, but can we also size and position the buttons in the view with CSS? For example, instead of writing all the UI code in Ruby, could we just add the buttons and labels without specifying a position, size, alignment and so forth and do it all with CSS instead?