simplified modular scale for scss

_modular.scss

$phi: 1.61803398874989; //"Golden Ratio"
$base-size: 1rem;

@function size($n) {
    $size: $base-size;

    @if $n > 0 {
        @for $i from 1 through $n {
            $size: $size * $phi;
        }
    }

    @return $size;
}

main.scss

@import "modular";

html {
  font-size: 16px; //define what 1rem actually is
}

/*
 * Now use size(n) to define all other sizes, margins, paddings, etc.
 * The following are just a few examples
 */

body {
  // properties for default text, base font size is size(0)
  font-size: size(0);
  line-height: size(1);  
}

h3, h4, h5, h6 {
  font-size: size(0);
  line-height: size(1);
}

h2 {
  font-size: size(1);
  line-height: size(2);
}

h1 {
  font-size: size(2);
  line-height: size(3);
}

p {
  margin-top: size(1);
  margin-bottom: size(1);
}