/**
 * Always convert pixel values to em values with 16px as em base.
 * Useful when you've defined different em base for the whole project
 * but want your media queries in ems (since they *always* take 16px as base).
 */
@function mq-em($pxval) {
    @return em($pxval, 16);
}

/**
 * Return value in pixels.
 * Useful when you have numbers as variables and don’t want to bother with
 * concatenation of strings.
 */
@function x-px($pxval) {
    @return $pxval + px;
}
