.toc-container {
  position: sticky;
  top: 100px;
  max-height: 80vh;
  overflow-y: auto;
  padding: 20px;
  background: #fdfdfd;
  font-family: 'Inter', sans-serif;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
  border-left: none;
}

.toc-container h3 {
  margin: 0 0 10px;
  font-size: 18px;
  color: #000;
  font-weight: 600;
}

.toc-list,
.toc-list ul {
  list-style: none;
  padding-left: 0;
  margin-left: 0;
}

.toc-list .toc-h2 { margin-left: 0; }
.toc-list .toc-h3 { margin-left: 15px; }
.toc-list .toc-h4 { margin-left: 30px; }
.toc-list .toc-h5 { margin-left: 45px; }
.toc-list .toc-h6 { margin-left: 60px; }

.toc-list li {
  font-size: 14px;
  margin: 2px 0;
  line-height: 1.4;
}

.toc-list li a {
  color: #000;
  text-decoration: none;
  display: inline-block;
  padding: 2px 0;
  transition: color 0.3s;
}

.toc-list li.active > a {
  color: #EC2227;
  font-weight: 600;
}

.toc-list li a:hover {
  color: #EC2227;
}

.toc-container::-webkit-scrollbar {
  width: 6px;
}
.toc-container::-webkit-scrollbar-thumb {
  background: #EC2227;
  border-radius: 10px;
}