:root {
  --sidebar-width: 300px;
  --color-bg: #f6f7fb;
  --color-surface: #ffffff;
  --color-text: #202433;
  --color-muted: #6b7280;
  --color-border: #e5e7f0;
  --color-accent: #4f46e5;
  --color-accent-bg: #eef0fe;
  --color-code-bg: #f3f4f9;
  --sidebar-bg: #ffffff;
  --shadow-sm: 0 1px 2px rgba(16, 24, 40, 0.04);
  --shadow-md: 0 4px 14px rgba(16, 24, 40, 0.07);
}

html.dark {
  --color-bg: #12141c;
  --color-surface: #1a1d29;
  --color-text: #e7e8f0;
  --color-muted: #9497a8;
  --color-border: #2b2f3d;
  --color-accent: #a5a0f6;
  --color-accent-bg: #22243a;
  --color-code-bg: #1a1d29;
  --sidebar-bg: #15171f;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.3);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: -apple-system, "Hiragino Sans", "Hiragino Kaku Gothic ProN",
    "Yu Gothic", "Segoe UI", Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.85;
  transition: background 0.15s ease, color 0.15s ease;
}

.layout {
  display: flex;
  align-items: flex-start;
  min-height: 100vh;
}

/* --- 上部バー --- */

.top-bar {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 30;
  display: flex;
  gap: 8px;
}

.icon-btn {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  font-size: 1.05rem;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
}

#menu-toggle { display: none; }

/* --- サイドバー --- */

.sidebar {
  width: var(--sidebar-width);
  flex: 0 0 var(--sidebar-width);
  height: 100vh;
  position: sticky;
  top: 0;
  overflow-y: auto;
  background: var(--sidebar-bg);
  border-right: 1px solid var(--color-border);
  /* 上部固定のアイコンボタン(.top-bar、40px四方+12px余白)と重ならないよう、
     上側にその分の余白を確保する。 */
  padding: 64px 16px 60px;
}

.nav-root {
  display: block;
  font-weight: 700;
  font-size: 1.02rem;
  color: var(--color-text);
  text-decoration: none;
  padding: 8px 8px 14px;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 12px;
}

.nav-parts { display: flex; flex-direction: column; gap: 4px; }

.nav-part { border: none; }

.nav-part-title {
  cursor: pointer;
  list-style: none;
  display: block;
  font-weight: 700;
  font-size: 0.92rem;
  color: var(--color-muted);
  padding: 7px 10px;
  border-radius: 8px;
}

.nav-part-title::-webkit-details-marker { display: none; }

.nav-part-title::before {
  content: '▸';
  display: inline-block;
  margin-right: 6px;
  transition: transform 0.15s ease;
}

.nav-part[open] > .nav-part-title::before { transform: rotate(90deg); }

.nav-part-title:hover { background: var(--color-accent-bg); color: var(--color-accent); }

.nav-part-body { padding-left: 6px; }

.nav-chapter { margin-top: 2px; border: none; }

.nav-chapter-title {
  cursor: pointer;
  list-style: none;
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-muted);
  padding: 5px 8px 5px 18px;
}

.nav-chapter-title::-webkit-details-marker { display: none; }

.nav-chapter-title::before {
  content: '▸';
  display: inline-block;
  margin-right: 5px;
  font-size: 0.75rem;
  transition: transform 0.15s ease;
}

.nav-chapter[open] > .nav-chapter-title::before { transform: rotate(90deg); }

.nav-items, .nav-part-body > ul { list-style: none; margin: 0; padding: 0; }

.nav-item {
  display: block;
  font-size: 0.86rem;
  color: var(--color-text);
  text-decoration: none;
  padding: 5px 10px 5px 30px;
  border-radius: 8px;
  line-height: 1.5;
}

.nav-index { padding-left: 10px; font-weight: 600; }

.nav-items-loose .nav-item { padding-left: 18px; }

.nav-item:hover { background: var(--color-accent-bg); color: var(--color-accent); }

.nav-item.active, .nav-index.active, a.nav-root.active {
  background: var(--color-accent-bg);
  color: var(--color-accent);
  font-weight: 700;
}

/* --- コンテンツ --- */

.content {
  flex: 1 1 auto;
  min-width: 0;
  padding: 48px 5vw 120px;
}

/* 記事全体（article）には固定max-widthを設定しない。
   .content（サイドバーを除いた残り全部）の幅をそのまま使い切り、
   幅の制御は下の「幅の使い分け」規則（本文だけ780px・グリッド系は右方向にフル活用）
   で個別要素ごとに行う。ここで article 自体を固定幅にすると、ワイドモニターで
   .content の余剰幅を使い切れず右側に空白ができてしまう（過去の不具合）。 */
article, .breadcrumb, .prev-next, .home {
  width: 100%;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 0.82rem;
  color: var(--color-muted);
  margin-bottom: 20px;
}

.breadcrumb a { color: var(--color-muted); text-decoration: none; }
.breadcrumb a:hover { color: var(--color-accent); }
.breadcrumb .sep { color: var(--color-border); }

.meta-bar {
  font-size: 0.82rem;
  color: var(--color-muted);
  margin-bottom: 16px;
}

article h1 {
  font-weight: 800;
  font-size: 1.9rem;
  margin: 0 0 20px;
  color: var(--color-text);
}

article h2 {
  font-weight: 800;
  font-size: 1.35rem;
  margin: 44px 0 16px;
  padding-left: 14px;
  border-left: 5px solid var(--color-accent);
  border-radius: 3px;
}

article h3 {
  font-size: 1.1rem;
  margin: 30px 0 12px;
  color: var(--color-text);
  font-weight: 700;
}

article p { margin: 0 0 16px; }

article ul, article ol {
  margin: 0 0 16px;
  padding-left: 1.6em;
}

article li { margin-bottom: 6px; }

article a { color: var(--color-accent); text-decoration: none; }
article a:hover { text-decoration: underline; }

article strong { color: var(--color-text); }

article blockquote {
  margin: 0 0 16px;
  padding: 12px 18px;
  background: var(--color-accent-bg);
  border-left: 4px solid var(--color-accent);
  border-radius: 0 12px 12px 0;
}

article code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.88em;
  background: var(--color-code-bg);
  padding: 0.15em 0.4em;
  border-radius: 5px;
}

article pre {
  background: var(--color-code-bg);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 16px;
  overflow-x: auto;
  margin: 0 0 20px;
}

article pre code {
  background: none;
  padding: 0;
  font-size: 0.86em;
  line-height: 1.6;
}

article pre.mermaid {
  background: #fff;
  display: flex;
  justify-content: center;
  padding: 24px;
}

.copy-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  font-size: 0.75rem;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-muted);
  cursor: pointer;
}

.copy-btn:hover { color: var(--color-accent); border-color: var(--color-accent); }

article table {
  border-collapse: separate;
  border-spacing: 0;
  width: 100%;
  margin: 0 0 20px;
  font-size: 0.92rem;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  overflow: hidden;
}

article th, article td {
  border-bottom: 1px solid var(--color-border);
  padding: 10px 14px;
  text-align: left;
}

article tr:last-child td { border-bottom: none; }

article th { background: var(--color-code-bg); font-weight: 700; }

article hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: 36px 0;
}

/* --- ページ内目次 --- */

.page-toc {
  background: var(--color-accent-bg);
  border: 1px solid var(--color-border);
  border-radius: 14px;
  padding: 12px 18px;
  margin: 0 0 28px;
  font-size: 0.88rem;
}

.page-toc summary {
  cursor: pointer;
  font-weight: 700;
  color: var(--color-accent);
}

.page-toc ul { margin: 10px 0 0; padding-left: 1.2em; }
.page-toc a { color: var(--color-text); text-decoration: none; }
.page-toc a:hover { color: var(--color-accent); }

/* --- タブ --- */

.tab-block { margin: 0 0 24px; }

.tab-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  background: var(--color-code-bg);
  padding: 5px;
  border-radius: 12px;
  margin-bottom: 18px;
}

.tab-btn {
  font-family: inherit;
  font-size: 0.86rem;
  padding: 8px 16px;
  border: none;
  background: none;
  color: var(--color-muted);
  cursor: pointer;
  border-radius: 8px;
  font-weight: 600;
}

.tab-btn:hover { color: var(--color-accent); }

.tab-btn.active { color: #fff; background: var(--color-accent); box-shadow: var(--shadow-sm); }

.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* --- カードグリッド（並列選択肢） --- */

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  align-items: start;
  gap: 16px;
  margin: 0 0 24px;
}

.info-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 14px;
  padding: 18px 20px;
  box-shadow: var(--shadow-sm);
}

.info-card h3 { margin: 0 0 8px; font-size: 1rem; color: var(--color-accent); }
.info-card p:last-child, .info-card ul:last-child, .info-card ol:last-child { margin-bottom: 0; }

/* --- FAQ アコーディオン --- */

.faq-list { margin: 0 0 24px; }

.faq {
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 4px 16px;
  margin-bottom: 8px;
  background: var(--color-surface);
}

.faq summary {
  cursor: pointer;
  font-weight: 700;
  padding: 12px 0;
  list-style: none;
}

.faq summary::-webkit-details-marker { display: none; }
.faq summary::before { content: '💬 '; }

.faq-body { padding: 0 0 14px; }
.faq-body :last-child { margin-bottom: 0; }

/* --- クイズ（理解度チェック） --- */

.quiz-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: 20px 22px;
  margin-bottom: 14px;
  box-shadow: var(--shadow-sm);
}

.quiz-num {
  display: inline-block;
  background: var(--color-accent);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 800;
  padding: 2px 11px;
  border-radius: 999px;
  margin-right: 8px;
  vertical-align: middle;
}

.quiz-question {
  font-weight: 700;
  font-size: 1rem;
  margin: 0 0 14px;
}

.quiz-options {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.quiz-options li {
  background: var(--color-code-bg);
  border-radius: 10px;
  padding: 9px 14px;
  font-size: 0.92rem;
}

.quiz-answer {
  border-top: 1px dashed var(--color-border);
  padding-top: 12px;
}

.quiz-answer summary {
  cursor: pointer;
  font-weight: 700;
  color: var(--color-accent);
  list-style: none;
}

.quiz-answer summary::-webkit-details-marker { display: none; }
.quiz-answer summary::before { content: '💡 '; }

.quiz-answer-body { padding-top: 10px; }
.quiz-answer-body :last-child { margin-bottom: 0; }

.quiz-correct {
  font-weight: 800;
  color: #16915a;
  margin: 0 0 8px;
}

html.dark .quiz-correct { color: #4ade80; }

.quiz-ref { font-size: 0.86rem; color: var(--color-muted); }
.quiz-ref a { color: var(--color-accent); }

/* --- 前後ページ送り --- */

.prev-next {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
}

.pn-link {
  flex: 1;
  text-decoration: none;
  border: 1px solid var(--color-border);
  border-radius: 14px;
  padding: 12px 16px;
  color: var(--color-text);
  background: var(--color-surface);
}

.pn-next { text-align: right; }

.pn-link:hover { border-color: var(--color-accent); box-shadow: var(--shadow-sm); }

.pn-label { display: block; font-size: 0.76rem; color: var(--color-muted); }
.pn-title { display: block; font-size: 0.92rem; font-weight: 600; margin-top: 2px; }

/* --- ホームページ --- */

.home-hero { text-align: center; padding: 40px 0 20px; }
.home-hero h1 { font-size: 2.1rem; }
.home-hero p { color: var(--color-muted); font-size: 1.02rem; }

.route-section, .part-section { margin-top: 40px; }

.route-grid, .part-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-top: 16px;
}

.route-card, .part-card {
  display: block;
  text-decoration: none;
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: 18px 20px;
  box-shadow: var(--shadow-sm);
  transition: border-color 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
}

.route-card:hover, .part-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.route-card h3, .part-card h3 { margin: 0 0 6px; font-size: 1.02rem; color: var(--color-accent); }
.route-card p, .part-card p { margin: 0; font-size: 0.88rem; color: var(--color-muted); }

/* --- 部トップ（ハブ）ページ --- */

.hub-header { padding: 20px 0 0; }
.hub-header h1 { margin-bottom: 6px; }
.hub-blurb { color: var(--color-muted); margin: 0 0 20px; }

.hub-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-top: 24px;
}

.hub-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 14px;
  padding: 16px 20px;
  box-shadow: var(--shadow-sm);
}

.hub-card h3 { margin: 0 0 8px; font-size: 1rem; color: var(--color-accent); }
.hub-desc { font-size: 0.84rem; color: var(--color-muted); margin: 0 0 10px; }
.hub-card ul { list-style: none; margin: 0; padding: 0; }
.hub-card li { margin-bottom: 6px; }
.hub-card a { color: var(--color-text); text-decoration: none; font-size: 0.92rem; }
.hub-card a:hover { color: var(--color-accent); text-decoration: underline; }

/* --- ページヒーロー（ライト・ポップ） --- */

.page-hero {
  background: linear-gradient(135deg, #eef0fe 0%, #f8f2ff 100%);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  padding: 30px 32px;
  margin-bottom: 28px;
}

html.dark .page-hero { background: linear-gradient(135deg, #1d2036, #241d36); }

.page-hero .eyebrow {
  display: inline-block;
  background: var(--color-accent);
  color: #fff;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.page-hero h1 {
  margin: 0 0 8px;
  font-size: clamp(1.6rem, 3.2vw, 2.1rem);
  line-height: 1.4;
  color: var(--color-text);
  font-weight: 800;
}

.page-hero p.hero-lead {
  margin: 0;
  color: var(--color-muted);
  font-size: 1rem;
  max-width: 620px;
}

.hero-meta {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 18px;
}

.hero-pill {
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 5px 14px;
  font-size: 0.8rem;
  color: var(--color-text);
}

html.dark .hero-pill { background: rgba(255, 255, 255, 0.06); }

.hero-progress {
  height: 6px;
  background: rgba(255, 255, 255, 0.6);
  border-radius: 999px;
  overflow: hidden;
  margin-top: 18px;
}

.hero-progress .bar {
  height: 100%;
  background: var(--color-accent);
  border-radius: 999px;
}

/* --- コールアウト（用途別・ポップ） --- */

.callout-box {
  border-radius: 14px;
  padding: 16px 20px;
  margin: 0 0 20px;
  border: 1px solid transparent;
}

.callout-box h3, .callout-box h4 {
  margin: 0 0 8px;
  font-size: 1rem;
}

.callout-box :last-child { margin-bottom: 0; }

.callout-box.info { background: #eef0fe; border-color: #d7dafc; }
.callout-box.ok { background: #eafbf1; border-color: #c9f2da; }
.callout-box.warn { background: #fff6e8; border-color: #fce4b8; }
.callout-box.danger { background: #fdeeee; border-color: #f8cfcf; }

html.dark .callout-box.info { background: #202346; border-color: #2c2f57; }
html.dark .callout-box.ok { background: #10261c; border-color: #1a4030; }
html.dark .callout-box.warn { background: #2c2210; border-color: #4a3714; }
html.dark .callout-box.danger { background: #2c1616; border-color: #4a1f1f; }

.callout-box.info h3 { color: #4f46e5; }
.callout-box.ok h3 { color: #16915a; }
.callout-box.warn h3 { color: #c17d13; }
.callout-box.danger h3 { color: #d64545; }

/* --- 優先度タグ（今の重要度を示す） --- */
/* 「今すぐ必須」「慣れてきたら」「将来的に」の3段階。
   本文中の見出し・段落・リストの手前に置き、情報の重み付けを視覚化する。 */

.priority-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.74rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 999px;
  margin: 0 0 10px;
}

.priority-tag.now { color: #b3261e; background: #fce8e6; }
.priority-tag.soon { color: #935a00; background: #fef2d9; }
.priority-tag.later { color: var(--color-muted); background: var(--color-code-bg); }

html.dark .priority-tag.now { color: #ff8a80; background: #3a1f1e; }
html.dark .priority-tag.soon { color: #ffcc80; background: #3a2f14; }

/* --- 図解（手描き風・CSSのみ） --- */

.diagram-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 18px;
  padding: 22px;
  margin: 0 0 24px;
  box-shadow: var(--shadow-sm);
}

.diagram-title {
  font-weight: 700;
  color: var(--color-accent);
  margin: 0 0 14px;
  font-size: 0.9rem;
  text-align: center;
}

.d-flow {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 10px;
  max-width: 640px;
  margin: 0 auto;
}

.d-row { display: flex; align-items: center; gap: 10px; justify-content: center; flex-wrap: wrap; }

.d-node {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 12px 16px;
  text-align: center;
  min-width: 120px;
}

.d-node strong { display: block; color: var(--color-text); font-size: 0.94rem; }
.d-node span { display: block; color: var(--color-muted); font-size: 0.78rem; margin-top: 2px; }

.d-node.accent { background: var(--color-accent-bg); border-color: #c7cbfb; }
.d-node.green { background: #eafbf1; border-color: #c9f2da; }
.d-node.warn { background: #fff6e8; border-color: #fce4b8; }

.d-arrow {
  color: var(--color-accent);
  font-weight: 900;
  font-size: 1.2rem;
  text-align: center;
  line-height: 1;
}

.d-arrow-label {
  font-size: 0.76rem;
  color: var(--color-accent);
  font-weight: 700;
  text-align: center;
  background: var(--color-accent-bg);
  border-radius: 999px;
  padding: 3px 14px;
  margin: -2px auto;
  width: fit-content;
}

.diagram-note {
  font-size: 0.8rem;
  color: var(--color-muted);
  margin-top: 14px;
  line-height: 1.6;
  text-align: center;
}

/* --- エンティティカード（ER図：手描き風） --- */

.entity-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 14px;
  overflow: hidden;
  width: 230px;
  flex-shrink: 0;
  box-shadow: var(--shadow-sm);
}

.entity-card .entity-name {
  background: var(--color-accent);
  color: #fff;
  font-weight: 700;
  font-size: 0.92rem;
  padding: 10px 14px;
  text-align: center;
}

.entity-card .entity-col {
  display: grid;
  grid-template-columns: 38px 1fr;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  font-size: 0.84rem;
  border-top: 1px solid var(--color-border);
}

.entity-card .entity-col:first-of-type { border-top: none; }

.entity-col .key-badge {
  font-size: 0.64rem;
  font-weight: 800;
  border-radius: 5px;
  text-align: center;
  padding: 2px 0;
}

.entity-col .key-badge.pk { background: #fde68a; color: #78350f; }
.entity-col .key-badge.fk { background: #bfdbfe; color: #1e3a8a; }
.entity-col .key-badge.none { visibility: hidden; }

.entity-relations { display: flex; flex-direction: column; gap: 4px; align-items: center; }

.entity-row { display: flex; align-items: center; gap: 4px; flex-wrap: wrap; justify-content: center; }

/* --- 関係線（SVG・水平） --- */

.rel-arrow-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  flex-shrink: 0;
}

.rel-arrow-wrap .rel-caption {
  font-size: 0.72rem;
  color: var(--color-muted);
  white-space: nowrap;
}

/* --- 関係線（SVG・垂直） --- */

.rel-arrow-wrap-v {
  display: flex;
  align-items: stretch;
  gap: 10px;
  margin: 2px 0;
}

.rel-caption-v {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: flex-start;
  padding: 2px 0;
}

.rel-caption-v .rel-mark {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--color-accent);
}

.rel-caption-v span:not(.rel-mark) {
  font-size: 0.76rem;
  color: var(--color-muted);
}

/* --- 比較（左右並び） --- */

.compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 0 0 24px;
}

.compare-col {
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: 18px 20px;
  background: var(--color-surface);
  box-shadow: var(--shadow-sm);
}

.compare-col h3 { margin: 0 0 10px; font-size: 1rem; }
.compare-col.left h3 { color: var(--color-accent); }
.compare-col.right h3 { color: #0f9f8f; }

/* --- 用語カード（検索・絞り込み） --- */

.term-toolbar {
  position: sticky;
  top: 0;
  z-index: 5;
  background: var(--color-bg);
  padding: 12px 0 16px;
  margin-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
}

.term-search {
  width: 100%;
  font-size: 0.98rem;
  padding: 12px 18px;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  margin-bottom: 12px;
  box-shadow: var(--shadow-sm);
}

.term-search:focus { outline: 2px solid var(--color-accent); outline-offset: 1px; }

.chip-row { display: flex; flex-wrap: wrap; gap: 6px; }

.chip {
  font-size: 0.78rem;
  padding: 6px 14px;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-muted);
  cursor: pointer;
  font-weight: 600;
}

.chip:hover { border-color: var(--color-accent); color: var(--color-accent); }
.chip.active { background: var(--color-accent); border-color: var(--color-accent); color: #fff; }

.term-count { font-size: 0.8rem; color: var(--color-muted); margin: 4px 0 16px; }

.term-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 12px;
  margin-bottom: 8px;
}

.term-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 14px;
  padding: 14px 16px;
  box-shadow: var(--shadow-sm);
}

.term-card .term-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 4px;
}

.term-card .term-name { font-weight: 700; font-size: 0.96rem; }
.term-card .term-star { font-size: 0.72rem; color: #d97706; white-space: nowrap; }
.term-card .term-desc { font-size: 0.86rem; color: var(--color-text); margin: 0 0 6px; }
.term-card .term-note { font-size: 0.78rem; color: var(--color-muted); margin: 0; }
.term-card .term-cat {
  display: inline-block;
  font-size: 0.68rem;
  color: var(--color-accent);
  background: var(--color-accent-bg);
  border-radius: 999px;
  padding: 2px 10px;
  margin-top: 8px;
}

.term-card.is-hidden { display: none; }

.role-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 10px;
  margin: 0 0 24px;
}

.role-card {
  border: 1px solid var(--color-border);
  border-radius: 14px;
  padding: 12px 14px;
  background: var(--color-surface);
  cursor: pointer;
  font-size: 0.84rem;
  text-align: left;
  box-shadow: var(--shadow-sm);
}

.role-card strong { display: block; margin-bottom: 4px; font-size: 0.9rem; }
.role-card:hover { border-color: var(--color-accent); }
.role-card.active { border-color: var(--color-accent); background: var(--color-accent-bg); }

@media (max-width: 640px) {
  .compare-grid { grid-template-columns: 1fr; }
  .entity-row { flex-direction: column; }
}

/* --- 幅の使い分け ---
   本文（見出し・段落・リスト・表など連続して読むもの）は読みやすい780pxに固定して左寄せ。
   カードグリッド・図解・用語一覧など「並べて見る」系は、本文と同じ左端に揃えたまま
   article（= .content の残り幅）いっぱいまで右方向にフル活用する。
   前任の実装は article 自体を1120px固定にした上でこの780px幅を中央寄せしていたため、
   article の固定幅とセットでないと成立しない壊れやすい計算(calc((100%-780px)/2))になっていた。
   article に幅の制約がなくなった今は、単純に「本文=780px左寄せ」「グリッド系=100%左寄せ」
   の2ルールだけで、ビューポート幅に関わらず両者の左端は自然に揃う。 */

article > h1, article > h2, article > h3,
article > p, article > ul, article > ol, article > blockquote,
article > table, article > hr, article > pre,
.faq-list, .meta-bar, .priority-tag-row {
  max-width: 780px;
  margin-left: 0;
  margin-right: auto;
}

.card-grid, .diagram-card, .hub-grid, .role-grid,
.term-toolbar, .term-grid, .tab-block, .compare-grid {
  max-width: 100%;
  margin-left: 0;
  margin-right: 0;
}

/* --- モバイル対応 --- */

@media (max-width: 880px) {
  #menu-toggle { display: block; }

  .sidebar {
    position: fixed;
    left: 0;
    top: 0;
    z-index: 25;
    transform: translateX(-100%);
    transition: transform 0.2s ease;
    box-shadow: 2px 0 12px rgba(0,0,0,0.2);
  }

  body.nav-open .sidebar { transform: translateX(0); }

  .content { padding: 72px 6vw 100px; }
}