div img {
  width: 100%;
  height: 100%;
  object-fit: contain; /* Shows full image, adds letterboxes */
}

a img {
  width: 100px;
  height: 100%;
}

li {
  list-style-type: none;
}

/* prevent changing of color for visited links */
a:visited {
    color: inherit; /* take color of normal link */
    text-decoration: inherit;
}