@mixin transition ($transition) {
	-webkit-transition: $transition;
	-moz-transition: $transition;
	-ms-transition: $transition;
	-o-transition: $transition;
	transition: $transition;
}

@mixin transition-dual ($transition1, $transition2) {
	-webkit-transition: $transition1, $transition2;
	-moz-transition: $transition1, $transition2;
	-ms-transition: $transition1, $transition2;
	-o-transition: $transition1, $transition2;
	transition: $transition1, $transition2;
}