@mixin mq($mq-breakpoint, $mq-width: 'min-width', $mq-breakpoints: $breakpoints) {
  @if $mq-width == 'max' {
    $mq-width: 'max-width';
    $mq-breakpoints: $max-breakpoints;
  }

  // If $mq-breakpoint is a key that exists in this
  @if map-has-key($mq-breakpoints, $mq-breakpoint) {
    $mq-breakpoint: map-get($mq-breakpoints, $mq-breakpoint);
  }

  @media(#{$mq-width}: #{$mq-breakpoint}) {
    @content;
  }
}

// Use @include mq(lg, max) for max-width or @include mq(lg)