#toc > h4 > span {
  transition: color ease-in-out 0.2s;
}

.collapsed {
  height: 10%;
  transition: height ease-in-out 0.5s;
}

.expanded {
  height: 40%;
  transition: height ease-in-out 0.5s;
}

.toc-content {
  display: none;
}

.expanded .toc-content {
  display: block;
  margin-top: 1rem;
}