lnked/react-starter

@mixin outline($color, $shadow-size: 2, $box-shadow: true, $text-shadow: false, $add-shadow: '') {
  outline: 0;

  &:focus {
    @if $box-shadow == true {
      box-shadow: 0 0 0 $shadow-size #fff, 0 0 0 $shadow-size + $shadow-size $color $add-shadow;
    }

    @if $text-shadow == true {
      text-shadow: 1px 1px 0 $color;
    }

    @else {
      box-shadow: 0 0 0 $shadow-size rgba($color, .5) $add-shadow;
    }
  }
}