.transition(@transition) {
	-webkit-transition: @transition;
	transition: @transition;
}

.box-shadow(@shadow) {
	-webkit-box-shadow: @shadow; // iOS <4.3 & Android <4.1
	box-shadow: @shadow;
}

.opacity(@opacity) {
  opacity: @opacity;
  // IE8 filter
  @opacity-ie: (@opacity * 100);
  filter: ~"alpha(opacity=@{opacity-ie})";
}