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

@mixin appearance($effect:none) {
  -webkit-appearance: $effect;
     -moz-appearance: $effect;
      -ms-appearance: $effect;
       -o-appearance: $effect;
          appearance: $effect;
}

@mixin transition($args...) {
  -webkit-transition: $args;
  -o-transition: $args;
  transition: $args;
}

@mixin transition-button() {
  @include transition(border .15s linear,color .15s linear,width .15s linear,background-color .15s linear);
}

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

@mixin disable-user-select() {
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  -khtml-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

@mixin clear-fix() {
  &:after {
    content: '';
    display: block;
    clear: both;
  }
}

@mixin outline() {
  &:focus {
    outline: 0;
  }
}

@mixin icon($code-icon) {
  font-size: inherit;
  text-rendering: auto;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font: 900 normal normal 14px/1 $font-icon;
  content: $code-icon;
}