.toc-wrapper {
  display: none;
}

body.toc-visible .toc-wrapper {
  display: block;
}

.toc-panel {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 1040;
  width: 320px;
  max-width: 85vw;
  height: 100vh;
  background: #fff;
  border-right: 1px solid #e0e0e0;
  box-shadow: 4px 0 20px rgba(0, 0, 0, 0.08);
  transform: translateX(-100%);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.toc-panel.toc-open {
  transform: translateX(0);
}

.toc-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid #e0e0e0;
  flex-shrink: 0;
}

.toc-title {
  font-family: 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 1rem;
  font-weight: 700;
  color: #404040;
}

.toc-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  color: #999;
  cursor: pointer;
  padding: 0 0.25rem;
  line-height: 1;
  transition: color 0.15s ease;
}

.toc-close:hover {
  color: #404040;
}

.toc-close:focus-visible {
  outline: 2px solid #0085a1;
  outline-offset: 2px;
}

.toc-body {
  flex: 1;
  overflow-y: auto;
  padding: 1rem 1.25rem 2rem;
  -webkit-overflow-scrolling: touch;
}

.toc-body #TableOfContents ul {
  list-style: none;
  padding-left: 0;
  margin: 0;
}

.toc-body #TableOfContents ul ul {
  padding-left: 1.25rem;
}

.toc-body #TableOfContents li {
  margin: 0;
}

.toc-body #TableOfContents a {
  display: block;
  padding: 0.35rem 0.5rem;
  color: #666;
  font-family: 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 0.875rem;
  font-weight: 400;
  line-height: 1.4;
  text-decoration: none;
  border-left: 2px solid transparent;
  border-radius: 0 4px 4px 0;
  transition: color 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}

.toc-body #TableOfContents a:hover {
  color: #0085a1;
  border-left-color: #0085a1;
  background: rgba(0, 133, 161, 0.04);
}

.toc-body #TableOfContents a.toc-active {
  color: #0085a1;
  font-weight: 600;
  border-left-color: #0085a1;
  background: rgba(0, 133, 161, 0.08);
}

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

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

.toc-post-list a {
  display: block;
  padding: 0.5rem 0.5rem;
  color: #666;
  font-family: 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 0.875rem;
  font-weight: 400;
  line-height: 1.4;
  text-decoration: none;
  border-left: 2px solid transparent;
  border-radius: 0 4px 4px 0;
  transition: color 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}

.toc-post-list a:hover {
  color: #0085a1;
  border-left-color: #0085a1;
  background: rgba(0, 133, 161, 0.04);
}

.toc-post-list a.toc-active {
  color: #0085a1;
  font-weight: 600;
  border-left-color: #0085a1;
  background: rgba(0, 133, 161, 0.08);
}

.toc-backdrop {
  position: fixed;
  inset: 0;
  z-index: 1035;
  background: rgba(0, 0, 0, 0.25);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.toc-backdrop.toc-open {
  opacity: 1;
  pointer-events: auto;
}

[data-theme="dark"] .toc-panel {
  background: #222;
  border-right-color: #444;
  box-shadow: 4px 0 20px rgba(0, 0, 0, 0.4);
}

[data-theme="dark"] .toc-header {
  border-bottom-color: #444;
}

[data-theme="dark"] .toc-title {
  color: #eee;
}

[data-theme="dark"] .toc-close {
  color: #888;
}

[data-theme="dark"] .toc-close:hover {
  color: #eee;
}

[data-theme="dark"] .toc-body #TableOfContents a {
  color: #aaa;
}

[data-theme="dark"] .toc-body #TableOfContents a:hover {
  color: #66bfff;
  border-left-color: #66bfff;
  background: rgba(102, 191, 255, 0.06);
}

[data-theme="dark"] .toc-body #TableOfContents a.toc-active {
  color: #66bfff;
  border-left-color: #66bfff;
  background: rgba(102, 191, 255, 0.1);
}

[data-theme="dark"] .toc-post-list a {
  color: #aaa;
}

[data-theme="dark"] .toc-post-list a:hover {
  color: #66bfff;
  border-left-color: #66bfff;
  background: rgba(102, 191, 255, 0.06);
}

[data-theme="dark"] .toc-post-list a.toc-active {
  color: #66bfff;
  border-left-color: #66bfff;
  background: rgba(102, 191, 255, 0.1);
}