/* ------------------------------------------------------------------------ *\
   mixins.animation.tree
\* ------------------------------------------------------------------------ */


/**
 * [tree__keyframes description]
 * @return {[type]} [description]
 */
a-tree__keyframes()
  @keyframes tree
    from
      opacity: 0

    to
      opacity: 1


/**
 * [tree description]
 * @return {[type]} [description]
 */
a-tree()
  animation-name: tree
  animation-duration: nix.animations.duration
  animation-fill-mode: both
  animation-timing-function: nix.animations.easing


/**
 * [slow description]
 * @return {[type]} [description]
 */
a-tree--slow()
  animation-duration: nix.animations.duration-slow


/**
 * [fast description]
 * @return {[type]} [description]
 */
a-tree--fast()
  animation-duration: nix.animations.duration-fast


/**
 * [tree__item description]
 * @return {[type]} [description]
 */
a-tree__item()
  transition-timing-function: nix.animations.easing
  transition-duration: nix.animations.duration
  transition-property: color, transform


/**
 * [slow description]
 * @return {[type]} [description]
 */
a-tree__item--slow()
  transition-duration: nix.animations.duration-slow


/**
 * [fast description]
 * @return {[type]} [description]
 */
a-tree__item--fast()
  transition-duration: nix.animations.duration-fast