// Define font-size (with fallback)
//
// @param number|string $size
//   A size from the $font-size map or px value to be converted
// @param number|string $context
//   (optional) Only used if em is the $base-unit. The value of the elements/parents
//   font-size if it differs from $base-font-size. Specified as a t-shirt size or
//   value in px.
@mixin font-size($size, $context: $base-font-size) {
  $allowed-types: "font-size", "px";
  $type: typey-validator($size, $allowed-types);
  @if $base-unit == rem {
    @if $rem-fallback == true {
      @if $type == "font-size" {
        $map-size: map-get($font-size, $size);
        font-size: $map-size;
      }
      @if $type == "px" {
        font-size: $size;
      }
    }
  }
  font-size: font-size($size, $context);
}