.flex(@display: flex, @flex-direction: row, @flex-wrap: nowrap, @align-items: flex-start, @justify-content: flex-start) {
	display: @display;
	flex-direction: @flex-direction;
	flex-wrap: @flex-wrap;
	align-items: @align-items;
	justify-content: @justify-content;
}

.flex-no-stretch() {
	flex-grow: 0;
	flex-shrink: 0;
}

.flex-center() {
	.flex(@align-items: center, @justify-content: center);
}

.transition(@property, @duration: .3s, @timing-function: ease, @delay: 0s) {
	transition-property: @property;
	transition-duration: @duration;
  transition-timing-function: @timing-function;
  transition-delay: @delay;
}