Generated by SassMeister.com.

SassMeister-input.scss

// ----
// Sass (v3.3.9)
// Compass (v1.0.0.alpha.20)
// ----

// ==========================================================================
// Vertical Rhythm and Modular Scale with Baseline Grid by Justin Metros
// inspired by www.gridlover.net
// ==========================================================================

// Sass Exponent Mixin
@function exponent($base, $exponent) {
  $value: $base;
  @if $exponent > 1 {
    @for $i from 2 through $exponent {
      $value: $value * $base;
    }
  }
  @if $exponent < 1 {
    @for $i from 0 through -$exponent {
      $value: $value / $base;
    }
  }
  @return $value;
}

// Rhythm Mixin. Adheres to Baseline Grid.
@mixin rhythm($scale, $before: 0, $after: 0) {
  @if $scale == 0 and $before == 0 and $after == 0 {
    font-size: $body-font-size;
    line-height: $body-font-size * $body-line-height;
  }
  @else {
    @if $scale == 0 {
      font-size: $body-font-size;
      line-height: $body-font-size * $body-line-height;
    }
    @else {
      $new-font-size: round($body-font-size * exponent($scale-factor, $scale));
      font-size: $new-font-size;
      line-height: ceil($new-font-size / ($body-line-height * $body-font-size)) * $body-line-height * $body-font-size;
    }
    margin-top: $body-font-size * $body-line-height * $before;
    margin-bottom: $body-font-size * $body-line-height * $after;
  }
}

// Rhythm Mixin. Margins Only.
@mixin margins($before: 0, $after: 0) {
  margin-top: $body-font-size * $body-line-height * $before;
  margin-bottom: $body-font-size * $body-line-height * $after;
}

// Rhythm Mixin. Padding Only.
@mixin paddings($before: 0, $after: 0) {
  padding-top: $body-font-size * $body-line-height * $before;
  padding-bottom: $body-font-size * $body-line-height * $after;
}



h1,.alpha { 
	@include rhythm(3, 0, 1);  
	line-height: .8;
}

SassMeister-output.css

Undefined variable: "$body-font-size".