#toc-container {
  position: fixed;
  top: 50%;
  right: 2rem;
  transform: translateY(-50%);
  max-width: 200px;
  font-size: 13px;
  line-height: 1.5;
  display: block;
  z-index: 100;
}

@media (max-width: 1200px) {
  #toc-container {
    display: none !important;
  }
}

#toc-container h4 {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #888;
  margin: 0 0 8px;
  font-weight: 600;
}

#toc-container ol {
  list-style: none;
  padding: 0;
  margin: 0;
}

#toc-container li {
  margin: 4px 0;
}

#toc-container a {
  color: #888;
  text-decoration: none;
  display: block;
  padding: 2px 0;
  border-left: 2px solid transparent;
  padding-left: 8px;
  transition: color 0.15s, border-color 0.15s;
}

#toc-container a:hover,
#toc-container a.active {
  color: #111;
  border-left-color: #111;
}