@mixin sk-arrow-down($size, $color: #666) {
  width:0;
  height:0;
  border-top: $size solid $color;
  border-right: $size solid transparent;
  border-left: $size solid transparent;
}

@mixin sk-arrow-right($size, $color: #666) {
  width:0;
  height:0;
  border-bottom: $size solid transparent;
  border-top: $size solid transparent;
  border-left: $size solid $color;
}