amis/scss/utilities/flex/_direction.scss

@mixin make-flex-direction($prefix: '.') {
  #{$prefix}flex-row {
    flex-direction: row;
  }

  #{$prefix}flex-row-reverse {
    flex-direction: row-reverse;
  }

  #{$prefix}flex-col {
    flex-direction: column;
  }
  #{$prefix}flex-col-reverse {
    flex-direction: column-reverse;
  }
}

@include make-flex-direction();
@each $deivce in map-keys($devices) {
  @include media-device($deivce) {
    @include make-flex-direction('.' + selector-escape($deivce + ':'));
  }
}

// hover ?