.toc {
  background: #f9f9f9;
  padding: 1.5rem;
  margin: 2rem 0;
  border-left: 4px solid #ccc;
}
.toc ul {
  padding-left: 1.5rem;
  list-style-type: disc;
}
.toc li {
  margin-bottom: 0.5rem;
}
.toc a {
  text-decoration: none;
  color: #333;
}
.toc a:hover {
  text-decoration: underline;
}