// calculate line height for a provided font-size
// requires rem value - 1.2rem vs 12px

@import "strip-unit";

@function line-height($font-size) {
    $increment: ($max-line-height - $min-line-height) / ($max-font-size - $min-font-size);

    @return $min-line-height + (($max-font-size - strip-unit($font-size)) * $increment);
}