/**
 * check if the color name is a light color
 */

isLight(color) {
  if (color == 'white' || color == 'light' || color == 'gray' || color == 'warning') {
    return true;
  }
  return false;
}

/**
 * convert values to rem
 */

toRem(value) {
    u = unit(value);
    if (u is 'px') {
        return unit(value/16, 'rem');
    } else {
        return unit(value, u);
    }
}


/**
 * get box shadow
 */
boxShadow() {
  return 0 6px 20px alpha($dark, 10%)
}
 

/**
 * Generate font sizes, based on equation
 * 
 * F(n) = f(n - 1) + { floor((n - 2) / 4) + 1 } * 2
 *
 * | index | px |  rem  |
 * |-------|----|-------|
 * |   0   | 12 | 0.750 |
 * |   1   | 14 | 0.875 |
 * |   2   | 16 | 1     |
 * |   3   | 18 | 1.125 |
 * |   4   | 20 | 1.25  |
 * |   5   | 24 | 1.5   |
 * |   6   | 28 | 1.75  |
 * |   7   | 32 | 2     |
 * |   8   | 36 | 2.25  |
 * |   9   | 42 | 2.625 |
 * |   10  | 48 | 3     |
 * |   11  | 54 | 3.375 |
 * |   12  | 60 | 3.75  |
 * |   13  | 68 | 4.25  |
 * |   14  | 76 | 4.75  |
 * 
 */

generateFontSizes() {
  current = 12;
  sizes = ();
  max = 16;
  for $n in (1...max) {
    increas = (floor(($n - 2) / 4) + 1) * 2
    current = current + increas;
    px = unit(current, 'px');
    rem = toRem(px);
    push(sizes, rem);
  }
  return sizes;
}