@use "sass:math";
@use "sass:meta";

@function strip-unit($number) {
  // Divide $number by its own unit to get a unitless number.
  // According to math.div documentation, "Any units shared by both numbers will be canceled out."
  // while different unit between numerator and denominator would be kept.
  // More to read here https://sass-lang.com/documentation/modules/math#div.
  // i.e. 16px / 1px = 16
  @if meta.type-of($number) == 'number' and not math.is-unitless($number) {
    @return math.div($number, ($number * 0 + 1));
  }
  @return $number;
}

@function px-to-rem($size, $base-font-size:16px) {
  @return math.div(strip-unit($size), strip-unit($base-font-size)) * 1rem;
}

%shadow {
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.3);
}
