/* ===== コラム記事ページ ===== */
.column-article {
  max-width: 820px;
  margin: 0 auto;
  padding: 32px 16px 60px;
  font-size: 1rem;
  color: #1c1f24;
  line-height: 1.85;
}

.column-breadcrumb {
  font-size: 0.78rem;
  color: #6b7280;
  margin-bottom: 12px;
}
.column-breadcrumb a {
  color: #2563eb;
  text-decoration: none;
}
.column-breadcrumb a:hover { text-decoration: underline; }
.column-breadcrumb span { color: #4b5563; }

.column-header h1 {
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  line-height: 1.4;
  margin: 0 0 16px;
  color: #1c1f24;
  letter-spacing: -0.01em;
}
.column-header h1 small {
  display: block;
  font-size: 0.6em;
  font-weight: 600;
  color: #2563eb;
  margin-top: 6px;
}

.column-meta {
  display: flex; flex-wrap: wrap;
  gap: 4px 16px;
  font-size: 0.82rem;
  color: #6b7280;
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid #e5e7eb;
}
.column-meta a {
  color: #4b5563;
  text-decoration: none;
  background: #f3f4f6;
  padding: 1px 8px;
  border-radius: 999px;
  font-size: 0.78rem;
  margin-right: 4px;
}
.column-meta a:hover { background: #dbeafe; color: #1e40af; }

.column-lead {
  font-size: 1.05rem;
  background: #eff6ff;
  border-left: 4px solid #2563eb;
  padding: 16px 20px;
  border-radius: 0 8px 8px 0;
  margin: 24px 0 32px;
  color: #1c1f24;
}
.column-lead strong { color: #1e40af; }

/* ===== 目次 ===== */
.column-toc {
  background: #f9fafb;
  border: 1px solid #e5e7eb;
  border-radius: 10px;
  padding: 20px 24px;
  margin: 0 0 40px;
}
.column-toc h2 {
  margin: 0 0 12px;
  font-size: 1rem;
  color: #1c1f24;
  border-bottom: 1px solid #e5e7eb;
  padding-bottom: 8px;
}
.column-toc ol {
  margin: 0;
  padding-left: 22px;
  font-size: 0.92rem;
}
.column-toc li { margin: 6px 0; }
.column-toc a {
  color: #2563eb;
  text-decoration: none;
}
.column-toc a:hover { text-decoration: underline; }

/* ===== セクション ===== */
.column-section {
  margin: 56px 0;
  scroll-margin-top: 80px;
}
.column-section h2 {
  font-size: 1.4rem;
  color: #1c1f24;
  border-left: 5px solid #2563eb;
  padding: 4px 0 4px 14px;
  margin: 0 0 20px;
  line-height: 1.4;
}
.column-section h3 {
  font-size: 1.1rem;
  color: #1c1f24;
  margin: 28px 0 12px;
  padding-left: 12px;
  border-left: 3px solid #93c5fd;
}
.column-section p {
  margin: 12px 0;
}
.column-section ul,
.column-section ol {
  padding-left: 22px;
  margin: 12px 0;
}
.column-section li {
  margin: 6px 0;
  line-height: 1.75;
}
.column-section strong {
  color: #1e40af;
  font-weight: 700;
}

.column-callout {
  background: #fef3c7;
  border-left: 4px solid #f59e0b;
  border-radius: 0 8px 8px 0;
  padding: 14px 18px;
  margin: 20px 0;
  font-size: 0.95rem;
}
.column-callout strong { color: #92400e; }

/* テーブル */
.column-table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 0.92rem;
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  overflow: hidden;
}
.column-table th, .column-table td {
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid #e5e7eb;
  vertical-align: top;
}
.column-table th {
  background: #f3f4f6;
  font-weight: 700;
  color: #1c1f24;
  font-size: 0.85rem;
}
.column-table tr:last-child th,
.column-table tr:last-child td { border-bottom: 0; }
.column-table tbody tr:hover { background: #f9fafb; }

/* ===== まとめCTA ===== */
.column-conclusion {
  background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
  border-radius: 14px;
  padding: 32px 28px;
  border: 1px solid #bfdbfe;
}
.column-conclusion h2 {
  border-left-color: #1e40af;
  font-size: 1.5rem;
}
.column-cta {
  display: flex; gap: 12px; flex-wrap: wrap;
  margin: 24px 0 8px;
}
.column-cta-note {
  font-size: 0.78rem;
  color: #4b5563;
  margin: 4px 0 0;
}

/* ===== 関連リンク ===== */
.column-related h2 {
  border-left-color: #10b981;
}
.column-related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
  margin-top: 16px;
}
.column-related-card {
  display: block;
  padding: 18px 20px;
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 10px;
  text-decoration: none;
  color: inherit;
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
}
.column-related-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(37,99,235,0.10);
  border-color: #93c5fd;
}
.column-related-icon { font-size: 1.6rem; }
.column-related-card h3 {
  font-size: 1rem;
  margin: 6px 0 4px;
  color: #2563eb;
}
.column-related-card p {
  margin: 0;
  font-size: 0.85rem;
  color: #4b5563;
  line-height: 1.6;
}

@media (max-width: 640px) {
  .column-section h2 { font-size: 1.2rem; }
  .column-section h3 { font-size: 1rem; }
  .column-conclusion { padding: 24px 18px; }
  .column-toc { padding: 16px 20px; }
}

/* ===== SEO用語集 ===== */
.glossary-card {
  background: linear-gradient(135deg, #eff6ff, #dbeafe);
  border-left: 5px solid #2563eb;
  padding: 18px 24px;
  border-radius: 10px;
  margin: 20px 0;
}
.glossary-category {
  display: inline-block;
  background: #2563eb;
  color: #fff;
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 0.74rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.glossary-card h1 {
  margin: 0 0 10px;
  font-size: 2rem;
  display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap;
}
.glossary-reading {
  font-size: 0.62em;
  color: #6b7280;
  font-weight: 400;
}
.glossary-def {
  font-size: 1rem;
  color: #1c1f24;
  margin: 0;
  line-height: 1.7;
}
.glossary-category-block {
  margin: 36px 0;
}
.glossary-category-block h2 {
  font-size: 1.2rem;
  color: #1c1f24;
  border-left: 5px solid #2563eb;
  padding: 4px 0 4px 14px;
  margin: 0 0 16px;
}
.glossary-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 12px;
}
.glossary-item {
  display: block;
  padding: 14px 16px;
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 10px;
  text-decoration: none;
  color: inherit;
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
}
.glossary-item:hover {
  transform: translateY(-3px);
  border-color: #93c5fd;
  box-shadow: 0 8px 20px rgba(37,99,235,0.10);
}
.glossary-item strong {
  display: block;
  font-size: 1.05rem;
  color: #2563eb;
}
.glossary-item .glossary-reading {
  font-size: 0.74rem;
  color: #6b7280;
}
.glossary-item p {
  margin: 6px 0 0;
  font-size: 0.85rem;
  color: #4b5563;
  line-height: 1.6;
}

/* ===== コラム末尾FAQ ===== */
.column-faq-block { }
.column-faq-item {
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  margin-bottom: 8px;
  overflow: hidden;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.column-faq-item[open] {
  border-color: #93c5fd;
  box-shadow: 0 4px 12px rgba(37,99,235,0.08);
}
.column-faq-item summary {
  padding: 12px 16px;
  font-size: 0.95rem;
  font-weight: 600;
  color: #1c1f24;
  cursor: pointer;
  display: list-item;
  position: relative;
  padding-left: 36px;
}
.column-faq-item summary::before {
  content: 'Q.';
  position: absolute;
  left: 14px;
  color: #2563eb;
  font-weight: 800;
}
.column-faq-item summary:hover { background: #f9fafb; }
.column-faq-a {
  padding: 4px 16px 14px 36px;
  font-size: 0.92rem;
  color: #4b5563;
  line-height: 1.7;
  position: relative;
}
.column-faq-a::before {
  content: 'A.';
  position: absolute;
  left: 14px;
  top: 4px;
  color: #10b981;
  font-weight: 800;
}

/* ===== 記事ページのサムネイル ===== */
.column-thumb {
  margin: 0 0 18px;
  border-radius: 12px;
  overflow: hidden;
  background: #e5e7eb;
  aspect-ratio: 5/2;
}
.column-thumb svg { display: block; width: 100%; height: 100%; }

/* ===== 引用ブロック ===== */
.column-quote {
  background: #fef3c7;
  border-left: 4px solid #f59e0b;
  border-radius: 0 8px 8px 0;
  padding: 14px 20px;
  margin: 18px 0;
  font-style: italic;
  font-weight: 600;
  color: #78350f;
}

/* ===== 前/次ナビゲーション ===== */
.column-nav-prevnext {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 12px;
  align-items: center;
  margin: 48px 0 32px;
  padding: 18px 20px;
  background: #f9fafb;
  border-radius: 12px;
  font-size: 0.88rem;
}
.column-nav-prev, .column-nav-next, .column-nav-back {
  display: inline-block;
  padding: 8px 14px;
  border-radius: 8px;
  text-decoration: none;
  color: #2563eb;
  background: #fff;
  border: 1px solid #e5e7eb;
  transition: background 0.15s, border-color 0.15s;
}
.column-nav-prev:hover, .column-nav-next:hover, .column-nav-back:hover {
  background: #eff6ff; border-color: #93c5fd;
}
.column-nav-next { text-align: right; }
.column-nav-back { color: #6b7280; font-weight: 600; }
.column-nav-prev.disabled, .column-nav-next.disabled {
  color: #9ca3af; background: transparent; border-color: transparent; cursor: default;
}

/* ===== 一覧カード ===== */
.column-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}
.column-card {
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
  transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
}
.column-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 28px rgba(37,99,235,0.10);
  border-color: #93c5fd;
}
.column-card .column-thumb {
  margin: 0;
  border-radius: 0;
}
.column-card-body {
  padding: 14px 16px 18px;
  position: relative;
}
.column-card-num {
  position: absolute;
  top: -14px; right: 14px;
  background: #2563eb;
  color: #fff;
  font-weight: 800;
  font-size: 0.78rem;
  padding: 4px 10px;
  border-radius: 999px;
  letter-spacing: 0.05em;
  box-shadow: 0 2px 6px rgba(37,99,235,0.3);
}
.column-card h3 {
  font-size: 1rem;
  margin: 4px 0 6px;
  color: #1c1f24;
  line-height: 1.4;
}
.column-card p {
  font-size: 0.85rem;
  color: #4b5563;
  margin: 0;
  line-height: 1.6;
}

/* ===== 執筆者バイライン (E-E-A-T) ===== */
.column-author {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  background: linear-gradient(135deg, #eff6ff 0%, #ffffff 70%);
  border: 1px solid #dbeafe;
  border-left: 5px solid #3b82f6;
  border-radius: 12px;
  padding: 22px 24px;
  margin: 48px 0 32px;
}
.column-author-avatar {
  flex-shrink: 0;
  width: 72px;
  height: 72px;
}
.column-author-avatar svg { width: 100%; height: 100%; display: block; }
.column-author-body { flex: 1; min-width: 0; }
.column-author-name {
  font-size: 0.95rem;
  color: #1e3a8a;
  margin-bottom: 2px;
}
.column-author-name strong { font-size: 1.05rem; }
.column-author-role {
  font-size: 0.82rem;
  color: #2563eb;
  font-weight: 600;
  margin-bottom: 8px;
}
.column-author-bio {
  font-size: 0.88rem;
  color: #374151;
  line-height: 1.7;
  margin: 0 0 10px;
}
.column-author-link {
  display: inline-block;
  font-size: 0.85rem;
  color: #2563eb;
  text-decoration: none;
  font-weight: 600;
}
.column-author-link:hover { text-decoration: underline; }
@media (max-width: 600px) {
  .column-author { flex-direction: column; align-items: center; text-align: center; }
  .column-author-link { display: inline-block; }
}