// Responsive Media Query
@mixin mediaQuery($arg...) {
  @if length($arg) == 1 {
    @media screen and (max-width: nth($arg, 1)) {
      @content;
    }
  };

  @if length($arg) == 2 {
    @media screen and (min-width: nth($arg, 1)) and (max-width: nth($arg, 2)) {
      @content;
    }
  }
}