/* ============================================
   Column (コラム) — 一覧 & 記事
   デザイントークンは /styles.css を継承
   ============================================ */

/* --- コラム見出しバンド --- */
.column-hero {
  background: linear-gradient(135deg, var(--support) 0%, #fff 100%);
  padding: 100px 0 60px;
  text-align: center;
}
.column-hero h1 {
  font-size: 36px;
  color: var(--primary);
  margin-bottom: 12px;
}
.column-hero p {
  color: var(--muted);
  font-size: 16px;
  margin: 0;
}

/* --- パンくず --- */
.breadcrumb {
  font-size: 13px;
  color: var(--muted);
  padding: 24px 0 0;
}
.breadcrumb a { color: var(--primary); }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb .sep { margin: 0 8px; color: var(--line); }

/* --- 記事一覧 --- */
.article-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  padding: 60px 0 100px;
}
.article-card {
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-base);
  overflow: hidden;
  transition: transform .3s ease, box-shadow .3s ease;
}
.article-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
}
.article-card-body {
  padding: 28px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}
.article-card .tag {
  align-self: flex-start;
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 8px;
}
.article-card time {
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 10px;
  display: block;
}
.article-card h2 {
  font-size: 19px;
  line-height: 1.5;
  margin-bottom: 12px;
  color: var(--ink);
}
.article-card h2 a:hover { color: var(--primary); }
.article-card p {
  font-size: 14px;
  color: var(--muted);
  margin: 0 0 20px;
  flex-grow: 1;
}
.article-card .read-more {
  font-weight: 700;
  color: var(--primary);
  font-size: 14px;
}

.column-empty {
  text-align: center;
  color: var(--muted);
  padding: 40px 0 100px;
}

/* --- 個別記事 --- */
.article {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 0 100px;
}
.article-header {
  padding: 24px 0 32px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 40px;
}
.article-header .tag {
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
}
.article-header h1 {
  font-size: 30px;
  line-height: 1.45;
  margin: 12px 0 16px;
}
.article-header time {
  font-size: 13px;
  color: var(--muted);
}

.article-body {
  font-size: 16px;
  line-height: 1.9;
  color: var(--body-text);
}
.article-body h2 {
  font-size: 22px;
  margin: 48px 0 16px;
  padding-left: 14px;
  border-left: 4px solid var(--primary);
}
.article-body h3 {
  font-size: 18px;
  margin: 32px 0 12px;
  color: var(--primary);
}
.article-body p { margin: 0 0 20px; }
.article-body ul, .article-body ol { margin: 0 0 20px 24px; }
.article-body ul { list-style: disc; }
.article-body ol { list-style: decimal; }
.article-body li { margin-bottom: 10px; }
.article-body strong { color: var(--ink); }
.article-body blockquote {
  margin: 28px 0;
  padding: 18px 24px;
  background: var(--soft-bg);
  border-left: 4px solid var(--accent);
  border-radius: 0 8px 8px 0;
  color: var(--body-text);
  font-weight: 500;
}

.sample-note {
  background: #fff8ec;
  border: 1px solid var(--accent);
  border-radius: 8px;
  padding: 12px 16px;
  font-size: 13px;
  color: var(--body-text);
  margin-bottom: 32px;
}

/* --- 記事末尾のCTA --- */
.article-cta {
  margin-top: 56px;
  padding: 40px;
  text-align: center;
  background: linear-gradient(135deg, var(--support) 0%, #fff 100%);
  border-radius: var(--radius);
  border: 1px solid var(--line);
}
.article-cta h3 { font-size: 20px; margin-bottom: 12px; color: var(--ink); }
.article-cta p { color: var(--muted); margin-bottom: 24px; font-size: 14px; }

.back-link {
  display: inline-block;
  margin-top: 40px;
  color: var(--primary);
  font-weight: 700;
  font-size: 14px;
}

/* --- 目次 --- */
.toc {
  background: var(--soft-bg);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 20px 24px;
  margin: 32px 0;
}
.toc-title {
  font-weight: 700;
  color: var(--ink);
  margin: 0 0 12px;
  font-size: 15px;
}
.toc ol { margin: 0 0 0 20px; list-style: decimal; }
.toc li { margin-bottom: 8px; font-size: 14px; }
.toc a { color: var(--primary); }
.toc a:hover { text-decoration: underline; }

/* 見出しがスティッキーヘッダーに隠れないように */
.article-body h2[id] { scroll-margin-top: 96px; }

/* --- 関連記事 --- */
.related {
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--line);
}
.related-title { font-size: 18px; margin-bottom: 16px; color: var(--ink); }
.related ul { margin-left: 20px; list-style: disc; }
.related li { margin-bottom: 8px; }
.related a { color: var(--primary); font-weight: 500; }
.related a:hover { text-decoration: underline; }

@media (max-width: 768px) {
  .article-list { grid-template-columns: 1fr; }
  .article-header h1 { font-size: 24px; }
  .article-body { font-size: 15px; }
  .article-cta { padding: 28px 20px; }
}