/* ============================================================
   ブログ記事ページ共通スタイル（/blog/配下の全記事で読み込む）
   一覧ページ(/blog/index.html)のデザイントークンと揃えている
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --primary:      #4A7C6F;
  --primary-dark: #3a6358;
  --bg:           #F7F4EF;
  --text:         #2D2D2D;
  --text-sub:     #6B6B6B;
  --border:       #E5E0D8;
  --white:        #ffffff;
}

body {
  font-family: 'Noto Sans JP', sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.9;
  font-size: 16px;
}

a { text-decoration: none; color: inherit; }

.container { max-width: 720px; margin: 0 auto; padding: 0 24px; }

/* ── Nav ── */
nav.site-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 32px;
  background: rgba(247,244,239,0.92);
  border-bottom: 1px solid var(--border);
}
.nav-logo {
  font-family: 'Shippori Mincho', serif;
  font-size: 18px;
  font-weight: 600;
  color: var(--primary);
  letter-spacing: 0.05em;
}
.nav-links { display: flex; gap: 24px; list-style: none; }
.nav-links a { font-size: 14px; color: var(--text-sub); }
.nav-links a:hover { color: var(--primary); }

/* ── パンくず ── */
.breadcrumb {
  padding: 24px 0 0;
  font-size: 12px;
  color: var(--text-sub);
}
.breadcrumb a { color: var(--primary); }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb .sep { margin: 0 6px; }

/* ── 記事ヘッダー ── */
.article-header { padding: 32px 0 8px; }
.article-badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--primary-dark);
  background: rgba(74,124,111,0.1);
  border-radius: 999px;
  padding: 3px 12px;
  margin-bottom: 12px;
}
.article-badge.badge-column { color: #8a6a3b; background: rgba(232,168,124,0.18); }
.article-badge.badge-staff  { color: #5a5a8a; background: rgba(122,122,180,0.14); }

.article-title {
  font-family: 'Shippori Mincho', serif;
  font-size: 28px;
  font-weight: 600;
  line-height: 1.55;
  letter-spacing: 0.03em;
  margin-bottom: 10px;
}
.article-date { font-size: 13px; color: var(--text-sub); }

/* ── 記事本文 ── */
.article-body { padding: 24px 0 48px; }
.article-body p { margin-bottom: 1.4em; }
.article-body h2 {
  font-family: 'Shippori Mincho', serif;
  font-size: 21px;
  font-weight: 600;
  line-height: 1.6;
  margin: 2em 0 0.8em;
  padding-left: 14px;
  border-left: 4px solid var(--primary);
}
.article-body h3 {
  font-size: 17px;
  font-weight: 700;
  margin: 1.6em 0 0.6em;
}
.article-body ul, .article-body ol { margin: 0 0 1.4em 1.4em; }
.article-body li { margin-bottom: 0.4em; }
.article-body a { color: var(--primary); text-decoration: underline; }
.article-body strong { background: linear-gradient(transparent 65%, rgba(232,168,124,0.35) 65%); }

/* ── 記事末尾CTA ── */
.article-cta {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px 24px;
  text-align: center;
  margin: 0 0 40px;
  box-shadow: 0 4px 24px rgba(74,124,111,0.08);
}
.article-cta p { font-size: 14px; color: var(--text-sub); margin-bottom: 16px; }
.article-cta .cta-btn {
  display: inline-block;
  background: var(--primary);
  color: var(--white);
  font-weight: 700;
  font-size: 15px;
  padding: 12px 32px;
  border-radius: 999px;
  transition: background 0.2s;
}
.article-cta .cta-btn:hover { background: var(--primary-dark); }

/* ── 一覧へ戻る ── */
.back-to-list { text-align: center; padding-bottom: 72px; }
.back-to-list a {
  font-size: 14px;
  color: var(--primary);
  font-weight: 700;
}
.back-to-list a:hover { text-decoration: underline; }

/* ── Footer ── */
footer { background: #2a3d38; padding: 32px 24px; text-align: center; }
footer .footer-links { margin-bottom: 14px; display: flex; gap: 20px; justify-content: center; flex-wrap: wrap; }
footer .footer-links a { font-size: 13px; color: rgba(255,255,255,0.7); }
footer .footer-links a:hover { color: #fff; }
footer p { font-size: 12px; color: rgba(255,255,255,0.4); }

@media (max-width: 640px) {
  nav.site-nav { padding: 16px 20px; }
  .nav-links { gap: 16px; }
  .nav-links a { font-size: 13px; }
  .article-title { font-size: 23px; }
  .article-body h2 { font-size: 19px; }
}