hugo-academic/assets/scss/academic/_footer.scss

.footer-license-icons {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  justify-content: center;
  list-style: none;
  height: auto;
  width: auto;
  font-size: 0;  // Hack to remove space characters between icons without using UL.
  text-decoration: none;
}

.footer-license-icons img {
 display: inline-flex;
  margin-right: 8px;
  height: 22px;
  vertical-align: text-bottom;
}