@mixin box-shadow($box-shadow-x, $box-shadow-y, $box-shadow-degradation, $box-shadow-color) {
  box-shadow: $box-shadow-x $box-shadow-y $box-shadow-degradation $box-shadow-color;
  -moz-box-shadow: $box-shadow-x $box-shadow-y $box-shadow-degradation $box-shadow-color;
  -webkit-box-shadow: $box-shadow-x $box-shadow-y $box-shadow-degradation $box-shadow-color;
}

@mixin box-shadow-inset($box-shadow-x, $box-shadow-y, $box-shadow-degradation, $box-shadow-color) {
  box-shadow: inset $box-shadow-x $box-shadow-y $box-shadow-degradation $box-shadow-color;
  -moz-box-shadow: inset $box-shadow-x $box-shadow-y $box-shadow-degradation $box-shadow-color;
  -webkit-box-shadow: inset $box-shadow-x $box-shadow-y $box-shadow-degradation $box-shadow-color;
}