.items {
  clear: both;
  display: flex;
  position: relative;
  width: 100%;
  max-width: 200px;
  height: auto;
  max-height: 100%;
  object-fit: contain;
  margin: 5px;
}

.items img {
  width: 100%;
  max-width: 80px;
  height: auto;
  max-height: 100%;
  object-fit: contain;
  margin: 5px;
}

/*This targets only GIF images within .items*/
.items img[src$=".gif"] {
  border: 20px solid red; /*Example style for GIFs..*/
}