/**
 * front.css — サイト全体レイアウト
 * Editorial テーマ — 「紙面の静寂」
 * CSS変数は colors.css + editorial.css で定義
 */

/* ========================================
   リセット
   ======================================== */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body, "Noto Sans JP", "Hiragino Sans", sans-serif);
  font-size: var(--font-size-base, 15.5px);
  line-height: var(--line-height, 2);
  color: var(--c-text, #1c1c1e);
  background: var(--c-bg, #f2f1ef);
  letter-spacing: var(--letter-spacing, 0.03em);
  word-break: break-word;
  font-feature-settings: "palt";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--c-accent);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--c-text);
}

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* ========================================
   サイトヘッダー
   ======================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--c-surface);
  border-bottom: 1px solid var(--c-border);
  transition: box-shadow 0.4s ease;
}

.site-header.is-scrolled {
  box-shadow: 0 1px 8px rgba(0, 0, 0, 0.04);
}

.header-inner {
  max-width: var(--site-max, 1100px);
  margin: 0 auto;
  padding: 24px 24px 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}

/* ロゴ */
.site-logo a {
  font-family: var(--font-heading, "Shippori Mincho B1", serif);
  font-size: 1.5rem;
  font-weight: 500;
  color: var(--c-text);
  letter-spacing: 0.12em;
  text-decoration: none;
  transition: color var(--transition);
}

.site-logo a:hover {
  color: var(--c-accent);
}

/* ナビゲーション */
.site-nav {
  display: none;
  padding-bottom: 20px;
}

.site-nav ul {
  display: flex;
  gap: 28px;
  align-items: center;
}

.site-nav a {
  font-size: 0.78rem;
  font-weight: 400;
  color: var(--c-muted);
  letter-spacing: 0.06em;
  position: relative;
  padding: 4px 0;
  transition: color var(--transition);
}

/* ホバー下線スライドイン */
.site-nav a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--c-accent);
  transition: width var(--transition);
}

.site-nav a:hover {
  color: var(--c-text);
}

.site-nav a:hover::after {
  width: 100%;
}

/* ハンバーガーメニュー */
.menu-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  color: var(--c-text);
}

.menu-toggle span {
  display: flex;
  flex-direction: column;
  gap: 5px;
  width: 20px;
}

.menu-toggle span i {
  display: block;
  height: 1.5px;
  background: var(--c-text);
  border-radius: 1px;
  transition: transform var(--transition), opacity var(--transition);
}

.menu-toggle.is-active span i:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.menu-toggle.is-active span i:nth-child(2) {
  opacity: 0;
}

.menu-toggle.is-active span i:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* モバイルナビゲーション */
.mobile-nav {
  display: none;
  position: fixed;
  top: 56px;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--c-surface);
  z-index: 99;
  padding: 32px 24px;
  overflow-y: auto;
}

.mobile-nav.is-open {
  display: block;
  animation: fadeIn 0.25s ease;
}

.mobile-nav a {
  display: block;
  padding: 16px 0;
  font-size: 0.95rem;
  color: var(--c-text);
  border-bottom: 1px solid var(--c-border-light);
  letter-spacing: 0.04em;
}

.mobile-nav a:hover {
  color: var(--c-accent);
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* ========================================
   パンくずリスト
   ======================================== */
.breadcrumb {
  max-width: var(--site-max, 1100px);
  margin: 0 auto;
  padding: 16px 24px;
  font-size: 0.72rem;
  color: var(--c-muted);
  letter-spacing: 0.02em;
}

.breadcrumb a {
  color: var(--c-muted);
}

.breadcrumb a:hover {
  color: var(--c-accent);
}

.breadcrumb-separator {
  margin: 0 8px;
  color: var(--c-border);
}

/* 下部配置のパンくず — 前後ナビ等との間に余白を確保 */
.breadcrumb--bottom {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--c-border-light, var(--c-border));
}

/* ========================================
   メインコンテンツ
   ======================================== */
.site-content {
  max-width: var(--site-max, 1100px);
  margin: 0 auto;
  padding: 32px 24px 80px;
}

/* ========================================
   カードグリッド
   ======================================== */
.card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.card {
  background: transparent;
  overflow: hidden;
  opacity: 0;
  animation: cardReveal 0.6s ease forwards;
}

/* スタガーアニメーション */
.card:nth-child(1) { animation-delay: 0s; }
.card:nth-child(2) { animation-delay: 0.06s; }
.card:nth-child(3) { animation-delay: 0.1s; }
.card:nth-child(4) { animation-delay: 0.14s; }
.card:nth-child(5) { animation-delay: 0.18s; }
.card:nth-child(6) { animation-delay: 0.22s; }
.card:nth-child(7) { animation-delay: 0.26s; }
.card:nth-child(8) { animation-delay: 0.3s; }
.card:nth-child(n+9) { animation-delay: 0.34s; }

@keyframes cardReveal {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.card-link {
  display: block;
  text-decoration: none;
  color: inherit;
}

/* サムネイル */
.card-thumb {
  position: relative;
  overflow: hidden;
  aspect-ratio: 3 / 2;
  border-radius: var(--radius);
}

.card-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.card:hover .card-thumb img {
  transform: scale(1.03);
}

/* カテゴリラベル */
.card-category {
  display: block;
  margin-top: 14px;
  font-size: 0.7rem;
  font-weight: 400;
  color: var(--c-accent);
  letter-spacing: 0.08em;
}

/* カード本文 */
.card-body {
  padding: 0;
  margin-top: 4px;
}

.card-title {
  font-family: var(--font-heading, "Shippori Mincho B1", serif);
  font-size: 1.05rem;
  font-weight: 500;
  line-height: 1.6;
  color: var(--c-text);
  margin-bottom: 6px;
  transition: color var(--transition);
}

.card:hover .card-title {
  color: var(--c-accent);
}

.card-excerpt {
  display: none;
}

.card-date {
  font-size: 0.7rem;
  color: var(--c-muted);
  letter-spacing: 0.06em;
}

/* ========================================
   ヒーローカード（トップページ1番目）
   ======================================== */
.card-hero {
  grid-column: 1 / -1;
  padding-bottom: 40px;
  margin-bottom: 8px;
  border-bottom: 1px solid var(--c-border);
}

.card-hero .card-thumb {
  aspect-ratio: 2 / 1;
}

.card-hero .card-title {
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1.5;
}

.card-hero .card-excerpt {
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  font-size: 0.85rem;
  color: var(--c-muted);
  line-height: 1.8;
  margin-bottom: 8px;
}

.card-hero .card-date {
  font-size: 0.72rem;
}

/* ========================================
   記事ページ
   ======================================== */
.article-container {
  max-width: var(--content-max, 720px);
  margin: 0 auto;
  padding: 0 0 80px;
}

/* 2カラムレイアウト時: 記事幅は親に委ねる */
.content-with-sidebar .article-container {
  max-width: none;
}

/* 2カラムレイアウト時: site-contentのpadding上書き回避 */
.content-with-sidebar .content-main {
  min-width: 0; /* grid子要素のオーバーフロー防止 */
}

/* margin-bottom はタイトル直下に必ず入るアイキャッチ画像ブロックの自然な余白に任せるため不要
   text-align は左寄せがデフォルト（タイトル要件） */
.article-header {
}

/* ヘッダー上部の日付＋カテゴリーバッジ（旧パンくず位置に表示） */
.article-meta-top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
  font-size: 0.78rem;
  color: var(--c-muted);
  letter-spacing: 0.04em;
}

.article-meta-top time {
  color: var(--c-muted);
  font-variant-numeric: tabular-nums;
}

/* カテゴリーバッジ（リンク）
 * 文字色 / hover 背景 / hover 後の境界に --c-article-category（管理画面で上書き可・空欄ならアクセント） */
.article-category {
  display: inline-flex;
  align-items: center;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--c-article-category, var(--c-accent));
  background: var(--c-accent-bg, var(--c-highlight));
  border: 1px solid var(--c-accent-light, var(--c-border));
  border-radius: 999px;
  padding: 3px 12px;
  letter-spacing: 0.08em;
  text-decoration: none;
  transition: background 0.15s ease, color 0.15s ease;
}

.article-category:hover {
  background: var(--c-article-category, var(--c-accent));
  color: #fff;
}

.article-title {
  font-family: var(--font-heading, "Shippori Mincho B1", serif);
  font-size: 1.6rem;
  font-weight: 700;
  line-height: 1.55;
  color: var(--c-text);
  text-align: left;
  margin-bottom: 24px;
  opacity: 0;
  animation: titleReveal 0.7s ease 0.1s forwards;
}

@keyframes titleReveal {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* メタ情報（更新日表示用、タイトル下） */
.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  font-size: 0.75rem;
  color: var(--c-muted);
  letter-spacing: 0.04em;
}

.article-meta-item {
  display: flex;
  align-items: center;
  gap: 4px;
}

.article-meta-item a {
  color: var(--c-accent);
  font-weight: 500;
}

.article-meta-separator {
  color: var(--c-border);
}

/* 記事本文 — article-body.css が唯一のソース（編集画面と共有） */

/* ========================================
   関連記事
   ======================================== */
.related-articles {
  max-width: var(--site-max, 1100px);
  margin: var(--spacing-section, 56px) auto 0;
  padding-top: 48px;
  border-top: 1px solid var(--c-border);
}

.related-title {
  font-family: var(--font-heading, "Shippori Mincho B1", serif);
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  margin-bottom: 28px;
  color: var(--c-muted);
  text-align: center;
}

.related-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

/* ========================================
   ページネーション
   ======================================== */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 4px;
  margin-top: 56px;
  padding: 24px 0;
}

.pagination a,
.pagination span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 8px;
  font-size: 0.82rem;
  color: var(--c-muted);
  text-decoration: none;
  transition: all 0.2s ease;
  border-radius: var(--radius);
}

.pagination a:hover {
  background: var(--c-highlight);
  color: var(--c-text);
}

.pagination .is-current {
  background: var(--c-accent);
  color: #fff;
}

.pagination .pagination-ellipsis {
  color: var(--c-border);
}

/* ========================================
   カテゴリページ
   ======================================== */
.category-header {
  margin-bottom: 48px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--c-border);
  text-align: center;
}

.category-title {
  font-family: var(--font-heading, "Shippori Mincho B1", serif);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--c-text);
  margin-bottom: 8px;
  letter-spacing: 0.06em;
}

.category-description {
  font-size: 0.88rem;
  color: var(--c-muted);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.8;
}

/* ========================================
   フッター
   ======================================== */
.site-footer {
  border-top: 1px solid var(--c-border);
  padding: 56px 24px;
  text-align: center;
  background: var(--c-surface);
}

.footer-inner {
  max-width: var(--site-max, 1100px);
  margin: 0 auto;
}

.footer-logo {
  font-family: var(--font-heading, "Shippori Mincho B1", serif);
  font-size: 1rem;
  font-weight: 500;
  color: var(--c-text);
  letter-spacing: 0.1em;
  margin-bottom: 10px;
}

.footer-description {
  font-size: 0.8rem;
  color: var(--c-muted);
  margin-bottom: 28px;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.8;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
  margin-bottom: 28px;
}

.footer-nav a {
  font-size: 0.75rem;
  color: var(--c-muted);
  letter-spacing: 0.04em;
  position: relative;
  transition: color var(--transition);
}

.footer-nav a::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--c-accent);
  transition: width var(--transition);
}

.footer-nav a:hover {
  color: var(--c-accent);
}

.footer-nav a:hover::after {
  width: 100%;
}

.footer-copyright {
  font-size: 0.7rem;
  color: var(--c-border);
  padding-top: 24px;
  border-top: 1px solid var(--c-border-light);
  letter-spacing: 0.04em;
}

/* ========================================
   404ページ
   ======================================== */
.error-page {
  text-align: center;
  padding: 100px 24px;
}

.error-code {
  font-family: var(--font-heading, "Shippori Mincho B1", serif);
  font-size: 5rem;
  font-weight: 700;
  color: var(--c-border);
  line-height: 1;
  margin-bottom: 16px;
}

.error-message {
  font-size: 1rem;
  color: var(--c-muted);
  margin-bottom: 32px;
}

.error-link {
  display: inline-block;
  padding: 12px 36px;
  background: var(--c-accent);
  color: #fff;
  border-radius: var(--radius);
  font-weight: 500;
  font-size: 0.85rem;
  text-decoration: none;
  letter-spacing: 0.04em;
  transition: background var(--transition);
}

.error-link:hover {
  background: var(--c-text);
  color: #fff;
}

/* ========================================
   ユーティリティ
   ======================================== */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* ========================================
   レスポンシブ: タブレット（640px〜）
   ======================================== */
@media (min-width: 640px) {
  .site-nav {
    display: block;
  }

  .menu-toggle {
    display: none;
  }

  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .related-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .card-hero .card-link {
    display: grid;
    grid-template-columns: 55% 1fr;
    gap: 32px;
    align-items: center;
  }

  .card-hero .card-thumb {
    aspect-ratio: 3 / 2;
  }

  .card-hero .card-body {
    margin-top: 0;
  }

  .card-hero .card-category {
    margin-top: 0;
  }

  .card-hero .card-title {
    font-size: 1.5rem;
  }

  .article-title {
    font-size: 1.8rem;
  }

  .header-inner {
    padding: 28px 24px 0;
  }

  .site-logo a {
    font-size: 1.6rem;
  }
}

/* ========================================
   レスポンシブ: モバイル（639px以下）
   ======================================== */
@media (max-width: 639px) {
  .header-inner {
    flex-direction: row;
    justify-content: space-between;
    padding: 0 20px;
    min-height: 56px;
  }

  .site-content {
    padding: 24px 20px 64px;
  }

  .breadcrumb {
    padding: 12px 20px;
  }

  .site-footer {
    padding: 40px 20px;
  }
}

/* ========================================
   レスポンシブ: デスクトップ（1024px〜）
   ======================================== */
@media (min-width: 1024px) {
  .article-title {
    font-size: 2rem;
  }

  .card-hero .card-title {
    font-size: 1.7rem;
  }
}

/* ========================================
   目次（TOC）
   ======================================== */
.toc {
  background: var(--c-surface, #f9f8f6);
  border: 1px solid var(--c-border, #d8d6d2);
  border-radius: var(--radius, 2px);
  padding: 20px 24px;
  margin: 24px 0 32px;
}
.toc-title {
  font-family: var(--font-heading, serif);
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--c-text);
}
nav.toc ul,
nav.toc ol {
  list-style: none;
  padding: 0;
  margin: 0;
}
.toc-list {
  counter-reset: toc-counter;
}
.toc-item {
  margin: 0;
  padding: 0;
}
.toc-item.toc-level-2 {
  counter-increment: toc-counter;
}
.toc-item a {
  display: block;
  padding: 4px 0;
  color: var(--c-text);
  font-size: 0.9rem;
  text-decoration: none;
  transition: color var(--transition, 0.3s ease);
}
.toc-item a:hover {
  color: var(--c-accent);
}
.toc-item.toc-level-2 > a::before {
  content: counter(toc-counter) ". ";
  color: var(--c-accent);
  font-weight: 600;
}
.toc-body {
  max-height: 300px;
  overflow: hidden;
  position: relative;
  transition: max-height 0.3s ease;
}
.toc-body.is-expanded {
  max-height: none;
}
.toc-toggle {
  display: none;
  width: 100%;
  border: none;
  background: transparent;
  color: var(--c-accent);
  cursor: pointer;
  padding: 8px 0 0;
  font-size: 0.85rem;
  margin-top: 4px;
}
.toc-toggle.is-visible {
  display: block;
}
.toc-level-3 {
  padding-left: 16px;
}
.toc-level-3 a::before {
  content: "- ";
  color: var(--c-muted);
  font-weight: 400;
}

/* ========================================
   記事末CTA
   ======================================== */
.article-cta {
  margin: 48px 0 32px;
  padding: 32px 24px;
  background: var(--c-accent-faint, #f0eee9);
  border: 2px solid var(--c-accent-pale, #a8b9c8);
  border-radius: var(--radius, 2px);
  text-align: center;
}
.article-cta-heading {
  font-family: var(--font-heading, serif);
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--c-text);
}
.article-cta-desc {
  font-size: 0.9rem;
  color: var(--c-muted);
  margin-bottom: 16px;
}
.article-cta-btn {
  display: inline-block;
  padding: 12px 40px;
  background: var(--c-accent);
  color: #fff !important;
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--radius, 2px);
  transition: opacity var(--transition, 0.3s ease);
}
.article-cta-btn:hover {
  opacity: 0.85;
  color: #fff !important;
}
.article-cta-image {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius, 2px);
  margin-bottom: 16px;
}
.sidebar-cta-image {
  width: 100%;
  height: auto;
  border-radius: var(--radius, 2px);
  margin-bottom: 12px;
}

/* ========================================
   前後記事ナビ
   ======================================== */
.article-nav {
  display: flex;
  gap: 16px;
  margin: 40px 0;
}
.article-nav-prev,
.article-nav-next {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 16px;
  background: var(--c-surface, #f9f8f6);
  border: 1px solid var(--c-border, #d8d6d2);
  border-radius: var(--radius, 2px);
  transition: border-color var(--transition, 0.3s ease);
  text-decoration: none;
}
.article-nav-prev:hover,
.article-nav-next:hover {
  border-color: var(--c-accent);
}
.article-nav-next {
  text-align: right;
}
.article-nav-label {
  font-size: 0.75rem;
  color: var(--c-muted);
  margin-bottom: 4px;
}
.article-nav-title {
  font-size: 0.9rem;
  color: var(--c-text);
  font-weight: 500;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.article-nav-empty {
  visibility: hidden;
}

/* ========================================
   著者・監修者
   ======================================== */
.article-credits {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 16px 0 8px;
  padding: 12px 16px;
  background: var(--c-surface, #f9f8f6);
  border-radius: var(--radius, 2px);
  font-size: 0.85rem;
}
.article-author-label,
.article-supervisor-badge {
  font-size: 0.7rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 2px;
  margin-right: 6px;
}
.article-author-label {
  background: var(--c-highlight, #eae8e4);
  color: var(--c-muted);
}
.article-supervisor-badge {
  background: var(--c-accent);
  color: #fff;
}
.article-author-name,
.article-supervisor-name {
  font-weight: 600;
  color: var(--c-text);
}
.article-supervisor-title {
  color: var(--c-muted);
  margin-left: 4px;
}
.article-author-desc {
  width: 100%;
  margin: 4px 0 0;
  color: var(--c-muted);
  font-size: 0.8rem;
}

/* ========================================
   PR/広告表記ラベル
   ======================================== */
.article-pr-label {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 2px 10px;
  background: var(--c-muted);
  color: #fff;
  border-radius: 2px;
  margin-bottom: 8px;
  letter-spacing: 0.1em;
}

/* ========================================
   更新日
   ======================================== */
.article-meta-separator {
  margin: 0 8px;
  color: var(--c-border);
}
.article-meta-updated {
  color: var(--c-muted);
  font-size: 0.85rem;
}

/* ========================================
   ピン止め記事セクション
   ======================================== */
.pinned-section {
  margin-bottom: 32px;
}
.pinned-section-title {
  font-family: var(--font-heading, serif);
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--c-accent);
  color: var(--c-text);
}
.pinned-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
}
.card-pinned {
  border: 2px solid var(--c-accent-pale, #a8b9c8);
}

/* ========================================
   ロゴ画像
   ======================================== */
.site-logo-img {
  max-height: 36px;
  width: auto;
}

/* ========================================
   フッター固定ページリンク
   ======================================== */
.footer-static-pages {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 20px;
  margin-top: 16px;
  font-size: 0.8rem;
}
.footer-static-pages a {
  color: var(--c-muted);
}
.footer-static-pages a:hover {
  color: var(--c-text);
}

/* ========================================
   モバイルCTAバー
   ======================================== */
.mobile-cta-bar {
  display: none;
}
@media (max-width: 1023px) {
  .mobile-cta-bar {
    display: block;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 900;
    padding: 8px 16px;
    background: rgba(255,255,255,0.97);
    border-top: 1px solid var(--c-border);
    box-shadow: 0 -2px 8px rgba(0,0,0,0.06);
  }
  .mobile-cta-btn {
    display: block;
    text-align: center;
    padding: 12px;
    background: var(--c-accent);
    color: #fff !important;
    font-weight: 700;
    font-size: 0.95rem;
    border-radius: var(--radius, 2px);
  }
  /* モバイルCTAバーの高さ分、本文にpaddingを追加 */
  body {
    padding-bottom: 64px;
  }
}

/* ========================================
   HTMLサイトマップ
   ======================================== */
.sitemap-category {
  margin-bottom: 32px;
}
.sitemap-category-title {
  font-family: var(--font-heading, serif);
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--c-border);
}
.sitemap-count {
  font-size: 0.8rem;
  font-weight: 400;
  color: var(--c-muted);
  margin-left: 8px;
}
.sitemap-list {
  list-style: none;
  padding: 0;
}
.sitemap-list li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 6px 0;
  border-bottom: 1px dotted var(--c-border-light, #e8e6e2);
}
.sitemap-list a {
  flex: 1;
  font-size: 0.9rem;
}
.sitemap-list time {
  font-size: 0.75rem;
  color: var(--c-muted);
  margin-left: 12px;
  white-space: nowrap;
}

/* ========================================
   404ページ
   ======================================== */
.error-page-container {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 50vh;
  padding: 40px 20px;
}
.error-page {
  text-align: center;
}
.error-code {
  font-family: var(--font-heading, serif);
  font-size: 5rem;
  font-weight: 700;
  color: var(--c-border);
  line-height: 1;
  margin-bottom: 16px;
}
.error-title {
  font-family: var(--font-heading, serif);
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 16px;
}
.error-message {
  color: var(--c-muted);
  margin-bottom: 24px;
  font-size: 0.9rem;
}
.error-link {
  display: inline-block;
  padding: 10px 32px;
  background: var(--c-accent);
  color: #fff !important;
  font-weight: 600;
  border-radius: var(--radius, 2px);
}