.toc {
  border-radius: 0.5rem;
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1),
    0 4px 6px -2px rgba(0, 0, 0, 0.05);
  background-color: var(--color-base-100);
}

.toc-title {
  font-weight: 600;
  color: var(--color-base-content);
  cursor: pointer;
}

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

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

.toc-link {
  display: block;
  padding: 0.25rem 0.5rem;
  font-size: 0.875rem;
  color: var(--color-base-content) / 0.7;
  text-decoration: none;
  border-radius: 0.25rem;
  transition: all 0.2s ease-in-out;
}

.toc-link:hover {
  color: var(--color-primary);
  background-color: var(--color-base-200);
}

.toc-pc {
  position: fixed;
  top: 5rem;
  right: 1rem;
  width: 16rem;
  max-height: 24rem;
  overflow-y: auto;
  z-index: 100;
  padding: 1rem;
  display: none;
  background-color: var(--color-base-100);
  border-radius: 0.5rem;
}

/* デスクトップサイズでのみ表示 */
@media (min-width: 1024px) {
  .toc-pc {
    display: block;
  }
}

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

.toc-pc .toc-item {
  list-style: none;
}

.toc-pc .toc-link.active {
  font-weight: 700;
  color: var(--color-accent-content);
  background-color: var(--color-base-300);
  border-left: 3px solid var(--color-primary);
}

.toc-pc .toc-link.current {
  font-weight: 700;
  color: var(--color-primary);
  background-color: var(--color-primary) / 0.1;
  border-left: 3px solid var(--color-primary);
  transform: translateX(2px);
}

.toc-pc .toc-level-2 {
  padding-left: 0;
}

.toc-pc .toc-level-3 {
  padding-left: 0.75rem;
}

.toc-pc .toc-level-4 {
  padding-left: 1.5rem;
}

.toc-pc .toc-level-5 {
  padding-left: 2.25rem;
}

.toc-pc .toc-level-6 {
  padding-left: 3rem;
}

.toc-mobile {
  margin-bottom: 1.5rem;
  padding: 1rem;
  display: block;
}

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

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

.toc-mobile .toc-item {
  list-style: none;
}

.toc-mobile .toc-level-2 {
  padding-left: 0;
}

.toc-mobile .toc-level-3 {
  padding-left: 0.75rem;
}

.toc-mobile .toc-level-4 {
  padding-left: 1.5rem;
}

.toc-mobile .toc-level-5 {
  padding-left: 2.25rem;
}

.toc-mobile .toc-level-6 {
  padding-left: 3rem;
}

.toc details {
  width: 100%;
}

.toc summary {
  cursor: pointer;
  user-select: none;
  list-style: none;
}

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

.toc summary::marker {
  content: none;
  display: none;
}

/* モバイル専用のデフォルトマーカー非表示 */
@media (max-width: 1023px) {
  .toc-mobile summary::-webkit-details-marker {
    display: none;
  }

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

  .toc-mobile summary {
    list-style-type: none;
  }
}

.toc summary::before {
  content: "▶";
  display: inline-block;
  margin-right: 0.5rem;
  transition: transform 0.2s ease-in-out;
}

.toc details[open] summary::before {
  transform: rotate(90deg);
}

/* スクロール追従ハイライト */
@media (prefers-reduced-motion: no-preference) {
  .toc-link {
    transition: all 0.2s ease-in-out;
  }
}

/* :target を使用したハイライト */
.toc-pc .toc-link:target,
.toc-pc .toc-link[href="#"]:target {
  font-weight: 700;
  color: var(--color-accent-content);
  background-color: var(--color-base-300);
  border-left: 2px solid var(--color-accent);
}

/* 見出しが表示されている時の対応するTOCリンクのハイライト */
h1:target ~ * .toc-pc .toc-link[href^="#"],
h2:target ~ * .toc-pc .toc-link[href^="#"],
h3:target ~ * .toc-pc .toc-link[href^="#"],
h4:target ~ * .toc-pc .toc-link[href^="#"],
h5:target ~ * .toc-pc .toc-link[href^="#"],
h6:target ~ * .toc-pc .toc-link[href^="#"] {
  color: var(--color-accent-content);
  background-color: var(--color-base-300) / 0.7;
}

@media (prefers-color-scheme: dark) {
  .toc-pc {
    background-color: var(--color-base-100);
  }
}

@media print {
  .toc {
    display: none;
  }
}

.toc-link:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* TOCのスムーズスクロール */
.toc-pc {
  scroll-behavior: smooth;
}

/* TOCの幅調整（大画面） */
@media (min-width: 1536px) {
  .toc-pc {
    width: 18rem;
  }
}

/* スクロールバーのスタイリング（PC用TOC） */
.toc-pc::-webkit-scrollbar {
  width: 0.5rem;
}

.toc-pc::-webkit-scrollbar-track {
  background-color: var(--color-base-200);
  border-radius: 0.25rem;
}

.toc-pc::-webkit-scrollbar-thumb {
  background-color: var(--color-base-300);
  border-radius: 0.25rem;
}

.toc-pc::-webkit-scrollbar-thumb:hover {
  background-color: var(--color-base-content) / 0.2;
}