.thumbnail-container img.file-thumbnail {
    background: #ffffff;
    -webkit-transition: all .2s ease-in-out;
    -moz-transition: all .2s ease-in-out;
    -o-transition: all .2s ease-in-out;
    -ms-transition: all .2s ease-in-out;
    position: relative;
}

.thumbnail-container {
  width: 100px;
  height: 60px;
  overflow: hidden;
  display: block;
  cursor: pointer;
}

.thumbnail-container img {
  height: 100%;
  min-width: 100%;
  left: 50%;
  position: relative;
  transform: translateX(-50%);
  object-fit: cover;
}