.docs-toc {
  position: relative;
  padding: var(--sp-spacing-lg);
  border-left: 1px solid var(--sp-color-border);
  background: var(--sp-color-surface);
  overflow: hidden;
  min-width: 0;
}

.toc-nav {
  position: sticky;
  top: var(--sp-header-height);
  max-height: calc(100vh - var(--sp-header-height));
  overflow-y: auto;
}

.toc-title {
  font-family: var(--sp-font-heading);
  font-size: var(--sp-font-size-xs);
  font-weight: var(--sp-font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--sp-color-text-secondary);
  margin: 0 0 var(--sp-spacing-md) 0;
}

.toc-content .toc-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.toc-content .toc-item {
  margin: 0;
  position: relative;
  padding-left: 16px;
  border-left: 1px solid var(--sp-color-border);
}

.toc-content .toc-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 1.1em;
  width: 10px;
  height: 1px;
  background: var(--sp-color-border);
}

.toc-content .toc-item:last-child {
  border-left-color: transparent;
}

.toc-content .toc-item:last-child::after {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  height: 1.1em;
  width: 1px;
  background: var(--sp-color-border);
}

.toc-content .toc-link {
  display: block;
  padding: var(--sp-space-2) 0;
  color: var(--sp-color-text-secondary);
  text-decoration: none;
  font-size: var(--sp-font-size-sm);
  transition: color var(--sp-animation-fast) ease;
}

.toc-content .toc-link:hover {
  color: var(--sp-color-primary);
}

.toc-content .toc-link.active {
  color: var(--sp-color-primary);
  font-weight: var(--sp-font-weight-medium);
}

.toc-content .toc-nested {
  margin-top: 0;
  margin-left: 6px;
}

.toc-content .toc-nested .toc-link {
  font-size: var(--sp-font-size-xs);
}

.docs-toc-mobile {
  display: none;
  margin-bottom: var(--sp-spacing-lg);
}

@media (max-width: 1200px) {
  .docs-toc-mobile {
    display: block;
  }
}

.toc-mobile-details {
  border: 1px solid var(--sp-color-border);
  border-radius: var(--sp-radius-md);
  background: var(--sp-color-surface);
}

.toc-mobile-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--sp-spacing-sm) var(--sp-spacing-md);
  cursor: pointer;
  list-style: none;
  user-select: none;
}

.toc-mobile-summary::-webkit-details-marker {
  display: none;
}

.toc-mobile-label {
  font-family: var(--sp-font-heading);
  font-size: var(--sp-font-size-sm);
  font-weight: var(--sp-font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--sp-color-text-secondary);
}

.toc-mobile-chevron {
  transition: transform var(--sp-animation-fast) ease;
  color: var(--sp-color-text-secondary);
}

.toc-mobile-details[open] .toc-mobile-chevron {
  transform: rotate(180deg);
}

.toc-mobile-nav {
  padding: 0 var(--sp-spacing-md) var(--sp-spacing-md);
  border-top: 1px solid var(--sp-color-border);
  max-height: 50vh;
  overflow-y: auto;
}

.toc-content--mobile ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.toc-content--mobile li {
  margin: 0;
}

.toc-content--mobile a {
  display: block;
  padding: var(--sp-spacing-xs) 0;
  padding-left: var(--sp-spacing-sm);
  color: var(--sp-color-text-secondary);
  text-decoration: none;
  font-size: var(--sp-font-size-sm);
  border-left: 2px solid transparent;
  margin-left: -2px;
  transition: color var(--sp-animation-fast) ease;
}

.toc-content--mobile a:hover {
  color: var(--sp-color-text-primary);
  border-left-color: var(--sp-color-text-primary);
}

.toc-content--mobile a.active {
  color: var(--sp-color-primary);
  border-left-color: var(--sp-color-primary);
}

.toc-content--mobile ul ul {
  padding-left: var(--sp-spacing-md);
}

.toc-content--mobile ul ul a {
  font-size: var(--sp-font-size-xs);
}