/* Table of Contents Styles */

/* Override wrapper width on desktop when TOC is present */
@media (min-width: 1024px) {
  .wrapper:has(.post-with-toc) {
    max-width: 1200px;
  }
}

.post-with-toc {
  display: flex;
  gap: 2rem;
}

.post-main-content {
  flex: 1;
  min-width: 0;
}

.toc-sidebar {
  width: 250px;
  flex-shrink: 0;
  display: none;
}

/* Show TOC sidebar on larger screens */
@media (min-width: 1024px) {
  .toc-sidebar {
    display: block;
  }
}

.toc-container {
  position: sticky;
  top: 20px;
  max-height: calc(100vh - 40px);
  overflow-y: auto;
  padding: 1rem;
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  box-shadow: 0 2px 8px var(--shadow-color);
}

.toc-container::-webkit-scrollbar {
  width: 4px;
}

.toc-container::-webkit-scrollbar-track {
  background: var(--bg-color);
  border-radius: 2px;
}

.toc-container::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 2px;
}

.toc-container::-webkit-scrollbar-thumb:hover {
  background: var(--secondary-text);
}

.toc-title {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--secondary-text) !important;
  margin: 0 0 0.75rem 0;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-color);
}

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

.toc-list li {
  margin: 0;
  padding: 0;
}

.toc-list a {
  display: block;
  padding: 0.35rem 0;
  font-size: 0.85rem;
  color: var(--text-color) !important;
  text-decoration: none;
  line-height: 1.4;
  transition: color 0.2s ease, padding-left 0.2s ease;
  border-left: 2px solid transparent;
  padding-left: 0.5rem;
}

.toc-list a:hover {
  color: var(--link-color) !important;
}

.toc-list a.active {
  color: var(--link-color) !important;
  border-left-color: var(--link-color);
  font-weight: 500;
}

/* Nested list indentation */
.toc-list .toc-list {
  padding-left: 0.75rem;
}

.toc-list .toc-list a {
  font-size: 0.8rem;
  color: var(--secondary-text) !important;
}

.toc-list .toc-list a:hover,
.toc-list .toc-list a.active {
  color: var(--link-color) !important;
}

/* Progress indicator */
.toc-progress {
  height: 2px;
  background-color: var(--border-color);
  border-radius: 1px;
  margin-bottom: 0.75rem;
  overflow: hidden;
}

.toc-progress-bar {
  height: 100%;
  background-color: var(--link-color);
  width: 0%;
  transition: width 0.1s ease-out;
}

/* Mobile TOC (collapsible at top of article) */
.toc-mobile {
  display: block;
  margin-bottom: 1.5rem;
}

@media (min-width: 1024px) {
  .toc-mobile {
    display: none;
  }
}

.toc-mobile-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 0.75rem 1rem;
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.9rem;
  color: var(--text-color);
  transition: background-color 0.2s ease;
}

.toc-mobile-toggle:hover {
  background-color: var(--card-hover-bg);
}

.toc-mobile-toggle-icon {
  transition: transform 0.2s ease;
}

.toc-mobile-toggle[aria-expanded="true"] .toc-mobile-toggle-icon {
  transform: rotate(180deg);
}

.toc-mobile-content {
  display: none;
  padding: 1rem;
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-top: none;
  border-radius: 0 0 8px 8px;
  margin-top: -1px;
}

.toc-mobile-content.open {
  display: block;
}

.toc-mobile-content .toc-list a {
  padding: 0.5rem 0.5rem;
}