text-drop-shadow(rgb-value, opacity, offsetX, offsetY, blur)
  text-shadow: offsetX offsetY blur rgba(rgb-value, opacity);


object-transitions(rate)
	-moz-transition:all rate linear;
	-webkit-transition:all rate linear;
	-o-transition:all rate linear;
	transition:all rate linear;

background-opacity(rgb-value, opacity)
  background: rgba(rgb-value, opacity);