/* ============================================================
   篠楽研 ブログ専用スタイル
   site.css の変数・ベースを継承
   フォント: Zen Kaku Gothic New（Google Fonts）
   ============================================================ */

.blog-main {
  padding-block: clamp(40px, 6vw, 80px) clamp(60px, 8vw, 120px);
  background: var(--color-bg);
}

/* 記事タイトル・本文・一覧の記事タイトルだけ Noto Sans JP に切替。
   フッター・パンくず・メタ・CTA・ボタン等は site.css のフォントを継承する。
   palt = 句読点・括弧・英数字のプロポーショナル詰め
   pkna = カナのプロポーショナル詰め */
.blog-post-title,
.blog-post-body,
.blog-list-title {
  font-family: "Noto Sans JP", -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic UI", sans-serif;
  font-feature-settings: "palt" 1, "pkna" 1;
}

/* breadcrumb */
.blog-breadcrumb {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-bottom: 24px;
}
.blog-breadcrumb a { color: var(--color-text-secondary); }
.blog-breadcrumb a:hover { color: var(--color-accent); }
.blog-breadcrumb span { margin: 0 8px; opacity: 0.5; }

/* post header */
.blog-post {
  max-width: 760px;
  margin: 0 auto;
}
.blog-post-header {
  margin-bottom: 36px;
}
.blog-post-series {
  font-size: 1rem;
  letter-spacing: 0.14em;
  font-weight: 700;
  color: var(--color-accent);
  text-transform: uppercase;
  margin-bottom: 16px;
}
.blog-post-title {
  font-size: clamp(2.1rem, 4.6vw, 3rem);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--color-text);
  margin-bottom: 18px;
}
.blog-post-meta {
  font-size: 1.05rem;
  color: var(--color-text-muted);
}

/* hero image */
.blog-post-hero {
  margin: 0 calc(var(--gutter) * -0.5) 40px;
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}
.blog-post-hero img {
  width: 100%;
  height: auto;
  display: block;
}
.blog-post-hero figcaption {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  padding: 12px 16px;
  background: var(--color-surface);
}

/* body — 老眼の指導者を想定して大きめ */
.blog-post-body {
  font-size: clamp(1.2rem, 1.8vw, 1.35rem);
  line-height: 1.95;
  color: var(--color-text);
  letter-spacing: 0.02em;
}
.blog-post-body h2 {
  font-size: clamp(1.5rem, 3vw, 1.85rem);
  font-weight: 800;
  margin: 48px 0 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-border);
  line-height: 1.4;
}
.blog-post-body h3 {
  font-size: clamp(1.3rem, 2.4vw, 1.5rem);
  font-weight: 700;
  margin: 36px 0 14px;
  line-height: 1.4;
}
.blog-post-body p {
  margin-bottom: 1.4em;
}
.blog-post-body strong {
  font-weight: 700;
  color: var(--color-accent-dark);
}
.blog-post-body img {
  margin: 24px auto;
  border-radius: 12px;
  box-shadow: var(--shadow-card);
}
.blog-post-body ul, .blog-post-body ol {
  margin: 0 0 1.2em 1.4em;
}
.blog-post-body li {
  margin-bottom: 0.4em;
}
.blog-post-body blockquote {
  border-left: 3px solid var(--color-accent);
  padding-left: 16px;
  margin: 24px 0;
  color: var(--color-text-secondary);
  font-style: normal;
}
.blog-post-body a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.blog-post-body a:hover {
  color: var(--color-accent-dark);
}

/* CTA */
.blog-post-cta {
  margin: 56px 0 36px;
  padding: 32px 28px;
  background: var(--color-accent-soft);
  border-radius: var(--radius-card);
  text-align: center;
}
.blog-post-cta h2 {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 12px;
  line-height: 1.4;
}
.blog-post-cta p {
  margin-bottom: 18px;
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}
.blog-cta-button {
  display: inline-block;
  padding: 14px 32px;
  background: var(--color-accent);
  color: #fff !important;
  font-weight: 700;
  font-size: 1.1rem;
  border-radius: var(--radius-button);
  text-decoration: none !important;
  transition: var(--transition);
}
.blog-cta-button:hover {
  background: var(--color-accent-dark);
}

/* related posts (same series) */
.blog-post-related {
  margin: 40px 0 32px;
  padding: 24px 24px 20px;
  background: var(--color-bg-soft, #fafaf6);
  border-radius: var(--radius-card);
  border: 1px solid var(--color-border);
}
.blog-post-related h2 {
  font-size: 1.05rem;
  font-weight: 700;
  margin: 0 0 14px;
  color: var(--color-text);
  line-height: 1.5;
}
.blog-related-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.blog-related-list li {
  padding: 8px 0;
  border-top: 1px solid var(--color-border);
}
.blog-related-list li:first-child {
  border-top: none;
}
.blog-related-list a {
  display: flex;
  gap: 14px;
  align-items: baseline;
  color: var(--color-text);
  text-decoration: none;
  font-size: 1rem;
  line-height: 1.5;
}
.blog-related-list a:hover {
  color: var(--color-accent);
}
.blog-related-list time {
  flex: 0 0 auto;
  min-width: 44px;
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  font-variant-numeric: tabular-nums;
}

/* pager */
.blog-post-pager {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 48px;
  padding-top: 28px;
  border-top: 1px solid var(--color-border);
  font-size: 1.05rem;
}
.blog-post-pager a {
  color: var(--color-text-secondary);
  max-width: 48%;
}
.blog-post-pager a:hover {
  color: var(--color-accent);
}
.blog-pager-next {
  margin-left: auto;
  text-align: right;
}

/* index page */
.blog-index {
  max-width: 1000px;
}
.blog-index-header {
  margin-bottom: 48px;
  text-align: center;
}
.blog-list {
  list-style: none;
  padding: 0;
  display: grid;
  gap: 32px;
  grid-template-columns: 1fr;
}
@media (min-width: 720px) {
  .blog-list { grid-template-columns: 1fr 1fr; }
}
.blog-list-item a {
  display: block;
  background: var(--color-surface);
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: var(--transition);
}
.blog-list-item a:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
}
.blog-list-thumb img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}
.blog-list-body {
  padding: 20px 22px 24px;
}
.blog-list-series {
  font-size: 0.9rem;
  letter-spacing: 0.14em;
  font-weight: 700;
  color: var(--color-accent);
  text-transform: uppercase;
  margin-bottom: 10px;
}
.blog-list-title {
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1.45;
  margin-bottom: 10px;
  color: var(--color-text);
}
.blog-list-meta {
  font-size: 1rem;
  color: var(--color-text-muted);
  margin-bottom: 10px;
}
.blog-list-desc {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}