/// Get a value from a nested map
///
/// @author Hugo Giraudel
/// @access public
/// @link https://www.sitepoint.com/extra-map-functions-sass/
///
/// @param {map} $map - map
/// @param {arglist} $keys - key chain
///
/// @return {*} - desired value
@function map-get-deep($map, $keys...) {
    @each $key in $keys {
        $map: map-get($map, $key);
    }
    @return $map;
}