@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;

}