/* =============================================
   コラム・ブログ セクション スタイル
   ============================================= */

/* ── トップページ コラム一覧（3枚カード） ── */
.column-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 36px;
}

.column-card {
  background: var(--white);
  border: 1px solid var(--gray-mid);
  border-radius: var(--radius);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  transition: box-shadow var(--transition), transform var(--transition);
}
.column-card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-3px);
}

.column-card__meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}
.column-card__date {
  font-size: 0.78rem;
  color: var(--text-lt);
  letter-spacing: 0.04em;
}
.column-card__tag {
  font-size: 0.72rem;
  background: var(--green-lt);
  color: var(--green);
  border: 1px solid var(--green);
  border-radius: 100px;
  padding: 2px 10px;
  font-weight: 700;
  white-space: nowrap;
}

.column-card__title {
  font-size: 0.97rem;
  font-weight: 700;
  color: var(--navy);
  line-height: 1.55;
  margin-bottom: 12px;
}
.column-card__title a {
  color: inherit;
  transition: color var(--transition);
}
.column-card__title a:hover { color: var(--green); }

.column-card__excerpt {
  font-size: 0.84rem;
  color: var(--text-lt);
  line-height: 1.85;
  flex: 1;
  margin-bottom: 16px;
}

.column-card__more {
  font-size: 0.83rem;
  font-weight: 700;
  color: var(--green);
  letter-spacing: 0.04em;
  transition: color var(--transition);
}
.column-card__more:hover { color: var(--navy); }

.column-more-wrap {
  text-align: center;
}
.column-more-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 2px solid var(--navy);
  color: var(--navy);
  font-size: 0.9rem;
  font-weight: 700;
  padding: 12px 36px;
  border-radius: var(--radius);
  letter-spacing: 0.06em;
  transition: background var(--transition), color var(--transition);
}
.column-more-btn:hover {
  background: var(--navy);
  color: var(--white);
}
.column-more-btn::after { content: '→'; }

/* ── コラム一覧ページ（column/index.html）── */
.blog-page {
  padding: 56px 0 80px;
  background: var(--gray);
  min-height: 60vh;
}
.blog-page__title {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 4px;
}
.blog-page__subtitle {
  font-size: 0.88rem;
  color: var(--text-lt);
  margin-bottom: 40px;
  padding-bottom: 24px;
  border-bottom: 2px solid var(--gold);
  display: inline-block;
}

.blog-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.blog-list-item {
  background: var(--white);
  border: 1px solid var(--gray-mid);
  border-radius: var(--radius);
  padding: 28px 32px;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0 24px;
  align-items: start;
  transition: box-shadow var(--transition);
}
.blog-list-item:hover { box-shadow: var(--shadow); }

.blog-list-item__aside {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  min-width: 80px;
  text-align: center;
}
.blog-list-item__date {
  font-size: 0.78rem;
  color: var(--text-lt);
}
.blog-list-item__tag {
  font-size: 0.7rem;
  background: var(--green-lt);
  color: var(--green);
  border: 1px solid var(--green);
  border-radius: 100px;
  padding: 2px 8px;
  font-weight: 700;
  white-space: nowrap;
}

.blog-list-item__title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 8px;
  line-height: 1.5;
}
.blog-list-item__title a { color: inherit; transition: color var(--transition); }
.blog-list-item__title a:hover { color: var(--green); }

.blog-list-item__excerpt {
  font-size: 0.86rem;
  color: var(--text-lt);
  line-height: 1.8;
}

/* ── 記事詳細ページ ── */
.post-page {
  padding: 56px 0 80px;
}
.post-page .container {
  max-width: 780px;
}

.post-header {
  margin-bottom: 40px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--gray-mid);
}
.post-header__meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}
.post-header__date {
  font-size: 0.82rem;
  color: var(--text-lt);
}
.post-header__tag {
  font-size: 0.75rem;
  background: var(--green-lt);
  color: var(--green);
  border: 1px solid var(--green);
  border-radius: 100px;
  padding: 2px 10px;
  font-weight: 700;
}
.post-header__title {
  font-size: 1.7rem;
  font-weight: 700;
  color: var(--navy);
  line-height: 1.5;
}

.post-body {
  font-size: 0.97rem;
  line-height: 2.1;
  color: var(--text);
}
.post-body h2 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--navy);
  margin: 40px 0 14px;
  padding-left: 14px;
  border-left: 4px solid var(--green);
}
.post-body h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--navy);
  margin: 28px 0 10px;
}
.post-body p { margin-bottom: 20px; }
.post-body strong { font-weight: 700; color: var(--navy); }
.post-body ul, .post-body ol {
  margin: 0 0 20px 24px;
}
.post-body li { margin-bottom: 8px; }
.post-body blockquote {
  border-left: 4px solid var(--gold);
  padding: 12px 20px;
  background: var(--gray);
  border-radius: 0 var(--radius) var(--radius) 0;
  margin: 20px 0;
  font-size: 0.93rem;
  color: var(--text-lt);
}

.post-author {
  margin-top: 48px;
  padding: 24px 28px;
  background: var(--green-lt);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  gap: 20px;
}
.post-author__icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--navy);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
}
.post-author__name {
  font-weight: 700;
  color: var(--navy);
  font-size: 0.95rem;
  margin-bottom: 4px;
}
.post-author__title {
  font-size: 0.8rem;
  color: var(--text-lt);
}

.post-nav {
  margin-top: 48px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
}
.post-nav a {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--navy);
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  border: 1px solid var(--gray-mid);
  border-radius: var(--radius);
  transition: background var(--transition), border-color var(--transition);
}
.post-nav a:hover {
  background: var(--gray);
  border-color: var(--navy);
}

/* ── fade-in アニメーション ── */
.fade-in {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.fade-in.in-view {
  opacity: 1;
  transform: translateY(0);
}

/* ── RESPONSIVE ── */
@media (max-width: 768px) {
  .column-grid { grid-template-columns: 1fr; }
  .blog-list-item { grid-template-columns: 1fr; }
  .blog-list-item__aside { flex-direction: row; align-items: center; margin-bottom: 10px; }
  .post-header__title { font-size: 1.3rem; }
  .post-nav { flex-direction: column; }
}