@mixin keyframes ($name) {
  @-webkit-keyframes #{$name} {
    @content;
  }
  @-moz-keyframes #{$name} {
    @content;
  }
  @keyframes #{$name} {
    @content;
  }
}

@mixin animation ($anim) {
  -webkit-animation: $anim;
  -moz-animation: $anim;
  animation: $anim;
}

@mixin box-shadow ($shadow) {
  -webkit-box-shadow: $shadow;
  -moz-box-shadow: $shadow;
  box-shadow: $shadow;
}

@mixin box-sizing ($box-sizing) {
  -webkit-box-sizing: $box-sizing;
  -moz-box-sizing: $box-sizing;
  box-sizing: $box-sizing;
}