michsch

/* font size & line height in px */
$font-size-body-px: 14;
$line-height-px: 21;

/* calculate font-size (in %) and line-height (in em) */
$font-size-body: pc($font-size-body-px, 16);
$line-height: em($line-height-px, $font-size-body-px);