@charset “UTF-8”;

/// Checks for a valid CSS length. /// /// @argument {string} $value /// /// @return {boolean} /// /// @access private

@function _is-length($value) {

@return type-of($value) != "null"
  and (
    str-slice($value + "", 1, 4) == "calc"
    or str-slice($value + "", 1, 3) == "var"
    or str-slice($value + "", 1, 3) == "env"
    or index(auto inherit initial 0, $value)
    or (type-of($value) == "number" and not(unitless($value)))
  );

}