/* ==========================================================================
   加水分解 HYDROLYSIS BLOG & DEV LOG - Design Stylesheet
   Minimalist, Typography-First & Clean Layout
   ========================================================================== */

:root {
  --blog-max-width: 820px;
  --blog-article-width: 740px;
  --blog-font-sans: 'Plus Jakarta Sans', 'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;
  --blog-font-display: 'Outfit', sans-serif;
}

body.blog-page {
  font-family: var(--blog-font-sans);
  background-color: var(--bg-deep);
  color: var(--text-main);
  line-height: 1.85;
  letter-spacing: 0.02em;
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
}

/* サイトヘッダー */
.blog-header {
  max-width: var(--blog-max-width);
  margin: 0 auto;
  padding: 44px 20px 24px;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  border-bottom: 1px solid var(--line);
}
.blog-brand {
  text-decoration: none;
  color: inherit;
  transition: opacity 0.2s;
}
.blog-brand:hover {
  opacity: 0.85;
}
.blog-brand-title {
  font-family: var(--blog-font-display);
  font-size: 1.85rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  margin: 0;
  line-height: 1.2;
}
.blog-brand-subtitle {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--text-dim);
  text-transform: uppercase;
  margin-top: 4px;
}
.blog-nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}
.blog-nav-link {
  font-size: 0.85rem;
  color: var(--text-dim);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border-radius: 20px;
  border: 1px solid var(--glass-border);
  background: var(--bg-glass-card);
  transition: all 0.2s;
}
.blog-nav-link:hover {
  color: var(--cyan);
  border-color: var(--cyan);
  transform: translateY(-1px);
}

/* メインコンテナ */
.blog-container {
  max-width: var(--blog-max-width);
  margin: 0 auto;
  padding: 40px 20px 80px;
}

/* セクションタイトル */
.section-title {
  font-family: var(--blog-font-display);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin: 44px 0 20px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.section-title::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--line);
}

/* おすすめ記事（Featured Card） */
.featured-card {
  background: var(--bg-glass-card);
  border: 1px solid var(--glass-border);
  border-radius: 14px;
  overflow: hidden;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  text-decoration: none;
  color: inherit;
  transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
  margin-bottom: 36px;
}
.featured-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-card);
  border-color: var(--cyan);
}
.featured-img-wrap {
  background: linear-gradient(135deg, #0f172a, #1e293b);
  position: relative;
  min-height: 220px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.featured-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s;
}
.featured-card:hover .featured-img-wrap img {
  transform: scale(1.03);
}
.featured-badge {
  position: absolute;
  top: 14px;
  left: 14px;
  background: var(--cyan);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}
.featured-content {
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.article-meta {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.article-category {
  color: var(--cyan);
  font-weight: 600;
}
.featured-title {
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1.45;
  margin: 0 0 12px;
}
.featured-excerpt {
  font-size: 0.92rem;
  color: var(--text-dim);
  line-height: 1.65;
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* 記事一覧（タイムライン風） */
.article-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.article-item {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 24px;
  padding: 20px 16px;
  border-bottom: 1px solid var(--line);
  text-decoration: none;
  color: inherit;
  align-items: center;
  border-radius: 10px;
  transition: all 0.2s;
}
.article-item:hover {
  background: var(--bg-glass-hover);
  padding-left: 20px;
}
.article-thumbnail {
  width: 130px;
  height: 85px;
  border-radius: 8px;
  background: var(--bg-subtle);
  border: 1px solid var(--glass-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  overflow: hidden;
}
.article-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.article-info-title {
  font-size: 1.08rem;
  font-weight: 700;
  margin: 0 0 6px;
  line-height: 1.4;
  color: var(--text-main);
  white-space: normal;
  word-break: break-word;
  overflow-wrap: break-word;
}
.article-info-desc {
  font-size: 0.88rem;
  color: var(--text-dim);
  margin: 0;
  line-height: 1.55;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* カテゴリタグ */
.category-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}
.category-chip {
  padding: 7px 16px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 500;
  background: var(--bg-glass-card);
  border: 1px solid var(--glass-border);
  color: var(--text-dim);
  text-decoration: none;
  transition: all 0.2s;
  cursor: pointer;
  user-select: none;
}
.category-chip:hover,
.category-chip.active {
  background: var(--cyan);
  color: #0b0f19;
  border-color: var(--cyan);
  font-weight: 700;
  box-shadow: 0 0 15px rgba(6, 182, 212, 0.4);
}
.article-item.hidden {
  display: none !important;
}

/* 記事下部CTAボックス */
.article-cta-box {
  margin: 48px 0 32px;
  padding: 32px 28px;
  background: linear-gradient(135deg, rgba(6, 182, 212, 0.08) 0%, rgba(99, 102, 241, 0.08) 100%);
  border: 1px solid rgba(6, 182, 212, 0.25);
  border-radius: 16px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}
.article-cta-box::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, #06b6d4, #6366f1, #ec4899);
}
.article-cta-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 4px 12px;
  background: rgba(6, 182, 212, 0.2);
  color: var(--cyan);
  border-radius: 20px;
  margin-bottom: 12px;
}
.article-cta-title {
  font-family: var(--blog-font-display);
  font-size: 1.5rem;
  font-weight: 800;
  margin: 0 0 10px;
  color: var(--text-main);
}
.article-cta-desc {
  font-size: 0.95rem;
  color: var(--text-dim);
  max-width: 540px;
  margin: 0 auto 20px;
  line-height: 1.6;
}
.article-cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 30px;
  background: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
  color: #fff !important;
  font-weight: 700;
  font-size: 1rem;
  text-decoration: none;
  box-shadow: 0 4px 20px rgba(6, 182, 212, 0.4);
  transition: all 0.25s ease;
}
.article-cta-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 26px rgba(6, 182, 212, 0.6);
}

/* おすすめ関連記事グリッド */
.related-posts-section {
  margin: 44px 0 20px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}
.related-posts-title {
  font-family: var(--blog-font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.related-posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}
.related-post-card {
  display: flex;
  flex-direction: column;
  padding: 16px;
  border-radius: 12px;
  background: var(--bg-glass-card);
  border: 1px solid var(--glass-border);
  text-decoration: none;
  color: inherit;
  transition: all 0.2s ease;
}
.related-post-card:hover {
  border-color: var(--cyan);
  background: var(--bg-glass-hover);
  transform: translateY(-2px);
}
.related-post-tag {
  font-size: 0.72rem;
  color: var(--cyan);
  font-weight: 600;
  margin-bottom: 6px;
}
.related-post-name {
  font-size: 0.92rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--text-main);
  margin: 0;
}

/* ==========================================================================
   個別記事（Single Article）レイアウト
   ========================================================================== */
.single-article {
  max-width: var(--blog-article-width);
  margin: 0 auto;
}
.single-header {
  margin-bottom: 36px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--line);
}
.single-meta {
  display: flex;
  gap: 12px;
  align-items: center;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 14px;
}
.single-title {
  font-size: 2.1rem;
  font-weight: 800;
  line-height: 1.35;
  margin: 0 0 20px;
  letter-spacing: -0.01em;
  white-space: normal;
  word-break: break-word;
  overflow-wrap: break-word;
}
.single-lead {
  font-size: 1.05rem;
  color: var(--text-dim);
  line-height: 1.75;
  border-left: 3px solid var(--cyan);
  padding-left: 18px;
  margin-top: 16px;
}

/* 目次 (Table of Contents) */
.toc-box {
  background: var(--bg-glass-card);
  border: 1px solid var(--glass-border);
  border-radius: 10px;
  padding: 20px 24px;
  margin: 32px 0 40px;
}
.toc-title {
  font-size: 0.95rem;
  font-weight: 700;
  margin: 0 0 12px;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 8px;
}
.toc-list {
  margin: 0;
  padding-left: 22px;
  font-size: 0.92rem;
  color: var(--text-dim);
}
.toc-list li {
  margin: 8px 0;
}
.toc-list a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s;
}
.toc-list a:hover {
  color: var(--cyan);
}

/* 記事本文 */
.post-content {
  font-size: 1rem;
  line-height: 1.9;
  color: var(--text-main);
}
.post-content h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 48px 0 20px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  gap: 10px;
}
.post-content h2 span.h2-number {
  color: var(--cyan);
  font-family: var(--blog-font-display);
}
.post-content h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 36px 0 16px;
}
.post-content p {
  margin-bottom: 24px;
}
.post-content strong {
  color: var(--text-main);
  background: linear-gradient(transparent 70%, rgba(14, 165, 233, 0.2) 70%);
}

/* 写真・画像埋め込みスタイル */
.post-media-figure {
  margin: 36px 0;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--glass-border);
  background: var(--bg-subtle);
  box-shadow: var(--shadow-card);
}
.post-media-figure img {
  width: 100%;
  height: auto;
  display: block;
}
.post-media-caption {
  padding: 12px 18px;
  font-size: 0.85rem;
  color: var(--text-muted);
  background: var(--bg-glass-card);
  text-align: center;
  border-top: 1px solid var(--glass-border);
}

/* 動画埋め込みスタイル */
.post-video-container {
  margin: 36px 0;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--glass-border);
  background: #000;
  box-shadow: var(--shadow-card);
}
.post-video-responsive {
  position: relative;
  padding-bottom: 56.25%; /* 16:9 ratio */
  height: 0;
  overflow: hidden;
}
.post-video-responsive iframe,
.post-video-responsive video {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

/* 著者ミニプロフィールカード（記事末尾） */
.author-box {
  margin-top: 60px;
  padding: 28px;
  background: var(--bg-glass-card);
  border: 1px solid var(--glass-border);
  border-radius: 14px;
  display: flex;
  gap: 24px;
  align-items: center;
}
.author-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  border: 2px solid var(--cyan);
  object-fit: cover;
  flex-shrink: 0;
}
.author-info h4 {
  margin: 0 0 6px;
  font-size: 1.15rem;
}
.author-info p {
  margin: 0 0 12px;
  font-size: 0.88rem;
  color: var(--text-dim);
  line-height: 1.6;
}

/* フッター */
.blog-footer {
  border-top: 1px solid var(--line);
  max-width: var(--blog-max-width);
  margin: 0 auto;
  padding: 44px 20px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.blog-footer-about {
  font-size: 0.88rem;
  color: var(--text-dim);
  line-height: 1.65;
}
.blog-copyright {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* レスポンシブ対応 */
@media (max-width: 768px) {
  .featured-card {
    grid-template-columns: 1fr;
  }
  .featured-img-wrap {
    min-height: 180px;
  }
  .article-item {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  .article-thumbnail {
    width: 100%;
    height: 140px;
  }
  .single-title {
    font-size: 1.65rem;
  }
  .author-box {
    flex-direction: column;
    text-align: center;
  }
}

/* 広告表示エリア（AdSense） */
.blog-ad-container {
  margin: 48px auto 36px;
  max-width: 100%;
  text-align: center;
  background: var(--bg-glass-card);
  border: 1px dashed var(--glass-border);
  border-radius: 10px;
  padding: 16px 12px;
  overflow: hidden;
}
.blog-ad-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 8px;
  display: block;
}