/**
 * 目次（Table of Contents）スタイル
 * PC版：右側フローティング表示
 * スマホ版：ボタンとモーダル表示
 */

/* PC版：右側フローティング目次 */
#toc-container {
  position: fixed;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  width: 280px;
  max-height: 80vh;
  background: white;
  border-radius: 12px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
  padding: 20px;
  overflow-y: auto;
  z-index: 1000;
  transition:
    top 0.3s ease,
    transform 0.3s ease;
}

#toc-container::-webkit-scrollbar {
  width: 6px;
}

#toc-container::-webkit-scrollbar-track {
  background: #f1f1f1;
  border-radius: 3px;
}

#toc-container::-webkit-scrollbar-thumb {
  background: #cbd5e0;
  border-radius: 3px;
}

#toc-container::-webkit-scrollbar-thumb:hover {
  background: #a0aec0;
}

/* CTAセクション */
.toc-cta-section {
  margin-bottom: 16px;
  padding-bottom: 16px;
  border-bottom: 2px solid #e2e8f0;
}

.toc-cta-button {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 10px 12px;
  margin-bottom: 8px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
  transition: all 0.2s ease;
  text-align: center;
}

.toc-cta-button:last-child {
  margin-bottom: 0;
}

.toc-cta-icon {
  font-size: 16px;
  line-height: 1;
}

.toc-cta-text {
  flex: 1;
  text-align: center;
}

.toc-cta-primary {
  background: linear-gradient(135deg, #f97316 0%, #ea580c 100%);
  color: white;
  box-shadow: 0 2px 8px rgba(249, 115, 22, 0.3);
}

.toc-cta-primary:hover {
  background: linear-gradient(135deg, #ea580c 0%, #dc2626 100%);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(249, 115, 22, 0.4);
}

.toc-cta-secondary {
  background: #1f2937;
  color: white;
  box-shadow: 0 2px 8px rgba(31, 41, 55, 0.3);
}

.toc-cta-secondary:hover {
  background: #111827;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(31, 41, 55, 0.4);
}

.toc-cta-tertiary {
  background: #3b82f6;
  color: white;
  box-shadow: 0 2px 8px rgba(59, 130, 246, 0.3);
}

.toc-cta-tertiary:hover {
  background: #2563eb;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.4);
}

#toc-container .toc-title {
  font-size: 16px;
  font-weight: 800;
  color: #1a202c;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid #e2e8f0;
}

.toc-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.toc-label::before {
  content: '📑';
  font-size: 18px;
  line-height: 1;
}

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

.toc-item {
  margin: 0;
  padding: 0;
}

.toc-link {
  display: block;
  padding: 8px 12px;
  color: #4a5568;
  text-decoration: none;
  font-size: 14px;
  line-height: 1.5;
  border-radius: 6px;
  transition: all 0.2s ease;
  word-break: break-word;
}

.toc-link:hover {
  background-color: #f7fafc;
  color: #2d3748;
  transform: translateX(4px);
}

.toc-link.toc-active {
  background-color: #fed7aa;
  color: #c05621;
  font-weight: 700;
  border-left: 3px solid #f97316;
  padding-left: 9px;
}

/* 見出しレベルのインデント */
.toc-level-2 .toc-link {
  padding-left: 12px;
  font-weight: 600;
}

.toc-level-3 .toc-link {
  padding-left: 24px;
  font-size: 13px;
  color: #718096;
}

.toc-level-4 .toc-link {
  padding-left: 36px;
  font-size: 12px;
  color: #a0aec0;
}

.toc-nested {
  margin-top: 4px;
  margin-left: 0;
}

/* スマホ版：ボタン */
#toc-button {
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: 56px;
  height: 56px;
  background: #f97316;
  color: white;
  border: none;
  border-radius: 50%;
  box-shadow: 0 4px 12px rgba(249, 115, 22, 0.4);
  cursor: pointer;
  z-index: 999;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  transition: all 0.3s ease;
}

#toc-button:hover {
  background: #ea580c;
  transform: scale(1.1);
  box-shadow: 0 6px 16px rgba(249, 115, 22, 0.5);
}

#toc-button:active {
  transform: scale(0.95);
}

#toc-button svg {
  width: 24px;
  height: 24px;
}

/* スマホ版：モーダル */
#toc-modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 1001;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}

#toc-modal.toc-modal-open {
  opacity: 1;
  visibility: visible;
}

.toc-modal-content {
  background: white;
  width: 100%;
  max-width: 100%;
  max-height: 80vh;
  border-radius: 20px 20px 0 0;
  padding: 24px;
  transform: translateY(100%);
  transition: transform 0.3s ease;
  overflow-y: auto;
}

#toc-modal.toc-modal-open .toc-modal-content {
  transform: translateY(0);
}

.toc-modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 2px solid #e2e8f0;
}

.toc-modal-title {
  font-size: 18px;
  font-weight: 800;
  color: #1a202c;
  margin: 0;
}

.toc-modal-title .toc-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.toc-modal-title .toc-label::before {
  content: '📑';
  font-size: 20px;
  line-height: 1;
}

/* スマホ版CTA */
.toc-cta-mobile {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 2px solid #e2e8f0;
}

.toc-cta-mobile .toc-cta-button {
  padding: 12px 16px;
  font-size: 14px;
  margin-bottom: 10px;
}

.toc-cta-mobile .toc-cta-icon {
  font-size: 18px;
}

.toc-close-button {
  background: none;
  border: none;
  font-size: 24px;
  color: #718096;
  cursor: pointer;
  padding: 0;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: all 0.2s ease;
}

.toc-close-button:hover {
  background: #f7fafc;
  color: #2d3748;
}

/* スマホ版の目次リスト */
#toc-modal .toc-list {
  padding-left: 0;
}

#toc-modal .toc-link {
  padding: 12px 16px;
  font-size: 15px;
}

#toc-modal .toc-level-2 .toc-link {
  padding-left: 16px;
}

#toc-modal .toc-level-3 .toc-link {
  padding-left: 28px;
}

#toc-modal .toc-level-4 .toc-link {
  padding-left: 40px;
}

/* レスポンシブ：PC版を非表示 */
@media (max-width: 767px) {
  #toc-container {
    display: none;
  }
}

/* レスポンシブ：スマホ版を非表示 */
@media (min-width: 768px) {
  #toc-button,
  #toc-modal {
    display: none;
  }
}

/* アニメーション */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.toc-item {
  animation: fadeIn 0.3s ease forwards;
}

.toc-item:nth-child(1) {
  animation-delay: 0.05s;
}
.toc-item:nth-child(2) {
  animation-delay: 0.1s;
}
.toc-item:nth-child(3) {
  animation-delay: 0.15s;
}
.toc-item:nth-child(4) {
  animation-delay: 0.2s;
}
.toc-item:nth-child(5) {
  animation-delay: 0.25s;
}
.toc-item:nth-child(6) {
  animation-delay: 0.3s;
}
.toc-item:nth-child(7) {
  animation-delay: 0.35s;
}
.toc-item:nth-child(8) {
  animation-delay: 0.4s;
}
.toc-item:nth-child(9) {
  animation-delay: 0.45s;
}
.toc-item:nth-child(10) {
  animation-delay: 0.5s;
}

/* スクロールバーのスタイル（モーダル用） */
.toc-modal-content::-webkit-scrollbar {
  width: 6px;
}

.toc-modal-content::-webkit-scrollbar-track {
  background: #f1f1f1;
  border-radius: 3px;
}

.toc-modal-content::-webkit-scrollbar-thumb {
  background: #cbd5e0;
  border-radius: 3px;
}

.toc-modal-content::-webkit-scrollbar-thumb:hover {
  background: #a0aec0;
}