.abstract-clipped {
  position: relative;
  max-height: 6em;
  overflow: hidden;
  line-height: 1.5em;
  cursor: pointer;
  mask-image: linear-gradient(to bottom, black 60%, transparent 100%);
  -webkit-mask-image: linear-gradient(to bottom, black 60%, transparent 100%);
  transition: max-height 0.3s ease;
}

.abstract-expanded {
  max-height: none !important;
  mask-image: none;
  -webkit-mask-image: none;
  cursor: auto;
}

.show-less-button {
  display: none;
  color: #0056b3;
  text-decoration: underline;
  cursor: pointer;
  font-size: 0.9em;
}

.abstract-expanded + .show-less-button {
  display: inline-block;
}