.nx-expandable-section {
  position: relative;
  max-height: 3em; 
  overflow: hidden;
  transition: all 2s ease-in-out;
}

.show-more-btn,
.show-less-btn {
  border: none;
  color: inherit;
  cursor: pointer;
  margin-top: 7px;
  padding: 3px 0 0 0;
  background: transparent;
  font-weight: normal;
  width: 100%;
  text-align: center;
  border-top: solid 1px #ddd;
}
.show-more-btn:hover,
.show-less-btn:hover {
  text-decoration: underline;
  background: transparent;
  border: none;
  color: inherit;
  border-top: solid 1px #ddd;
}

.show-more-btn:focus,
.show-less-btn:focus {
  outline: none;
}