.right () {
  float: right;
}

.left () {
  float: left;
}

.clear (@type: both) {
  clear: @type;
}

.index (@index: 1) {
  z-index: @index;
}

.absolute (@index: 1) {
  position: absolute;
  .index (@index);
}

.relative (@index: 1) {
  position: relative;
  .index (@index);
}

.fixed (@index: 1) {
  position: fixed;
  .index (@index);
}

.transition (@type: none, @time: 0s) {
  -webkit-transition: @type @time linear;
  transition: @type @time linear;
}

.user-select(@type: none) {
  -webkit-user-select: @type;
  -moz-user-select: @type;
  -ms-user-select: @type;
  user-select: @type;
}