$base: 16 !default;

@function scut-strip-unit ($num) {
  @return $num / ($num * 0 + 1);
}

@function rem ($pixels) {
  @return scut-strip-unit($pixels) / $base * 1rem;
}
@function em ($pixels, $context: $base) {
    @return #{$pixels/$context}em;
  }