ul.thumbnails.image_picker_selector {
  overflow: auto;
  list-style: none outside none;
  padding: 0;
  margin: 0;
  display: flex;
  gap: .5rem;
  justify-content: flex-start;
  flex-wrap: wrap;
}

ul.thumbnails.image_picker_selector ul {
  overflow: auto;
  list-style: none outside none;
  padding: 0;
  margin: 0;
}

ul.thumbnails.image_picker_selector li.group_title {
  float: none;
}

ul.thumbnails.image_picker_selector li {
  margin-bottom: 1rem;
}

ul.thumbnails.image_picker_selector li .thumbnail {
  padding: .375rem;
  border: .0625rem solid #ddd;
}

ul.thumbnails.image_picker_selector li .thumbnail.selected {
  background-color: #08c;
}

.columns-1 li {
  width: 99%;
}

.columns-2 li {
  width: 49%;
}

.columns-3 li {
  width: 32%;
}

.columns-4 li {
  width: 24%;
}

.file-upload-js-error {
  color: red;
}