.widget_media_gallery {
  @for $items from 1 through 9 {
    .gallery-columns-#{$items} .gallery-item {
      @if ($items == 1) {
        width: 100%; 
        max-width: 100%;
      } @else {
        max-width: (100%/$items - 2);
      }
    }
  }

  .gallery {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
  }

  br {
    display: none;
  }

  .gallery-item {
    display: inline-block;
    text-align: center;
    vertical-align: top;
  }
}