/* ============================================================
   量子ビジネス総研 ブログ固有スタイル
   ※ヘッダー/フッター/ナビは ../styles.css を使用（ここに書かない）
   ============================================================ */

/* ---------- ブログ共通ヘッダー帯 ---------- */
.blog-page-header {
  background: linear-gradient(135deg, #2a0a54 0%, #3b1272 60%, #4c1d95 100%);
  background-image:
    repeating-radial-gradient(circle at 12% 130%, rgba(255, 255, 255, 0.05) 0 2px, transparent 2px 24px),
    repeating-radial-gradient(circle at 92% -40%, rgba(255, 255, 255, 0.04) 0 2px, transparent 2px 30px),
    linear-gradient(135deg, #2a0a54 0%, #3b1272 60%, #4c1d95 100%);
  color: #f4f0ff;
  padding: 2.6rem 0 2.2rem;
}

.blog-page-header .breadcrumb {
  color: #cfc0f0;
  text-shadow: none;
}

.blog-page-header .breadcrumb a {
  color: #cfc0f0;
}

.blog-page-header h1 {
  font-size: clamp(1.4rem, 3vw, 2rem);
  line-height: 1.5;
  letter-spacing: 0.03em;
  color: #ffffff;
}

.article-meta {
  margin-top: 0.8rem;
  font-size: 0.85rem;
  color: #cfc0f0;
  display: flex;
  flex-wrap: wrap;
  gap: 1.2rem;
}

/* ---------- 2カラム ---------- */
.blog-two-column {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 2.5rem;
  padding-top: 2.5rem;
  padding-bottom: 3.5rem;
}

/* ---------- 記事本文 ---------- */
.article-main {
  min-width: 0;
}

.article-hero {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: 14px;
  box-shadow: 0 10px 34px rgba(42, 10, 84, 0.18);
  margin-bottom: 2rem;
}

.article-content h2 {
  font-size: 1.35rem;
  color: #3b1272;
  padding: 0.5rem 0 0.5rem 1rem;
  border-left: 5px solid #5b21b6;
  background: linear-gradient(90deg, #ede9fe 0%, rgba(237, 233, 254, 0) 85%);
  border-radius: 4px;
  margin: 2.2rem 0 1.2rem;
  line-height: 1.5;
}

.article-content h3 {
  font-size: 1.08rem;
  color: #2a0a54;
  margin: 1.6rem 0 0.8rem;
  padding-bottom: 0.3rem;
  border-bottom: 2px dotted #8b5cf6;
}

.article-content p {
  margin-bottom: 1.15rem;
}

.article-content ul,
.article-content ol {
  margin: 0 0 1.2rem 0.3rem;
}

.article-content li {
  margin-bottom: 0.4rem;
}

.article-content strong {
  color: #3b1272;
}

/* ---------- シェア ---------- */
.share-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin: 2.5rem 0 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid #ddd3f0;
}

.share-buttons a {
  display: inline-block;
  padding: 0.55rem 1.3rem;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 700;
  color: #ffffff;
}

.share-x {
  background: #0f1419;
}

.share-facebook {
  background: #1877f2;
}

.share-hatena {
  background: #00a4de;
}

.back-to-list {
  display: inline-block;
  margin-top: 0.5rem;
  font-weight: 700;
  color: #5b21b6;
}

/* ---------- ブログ一覧 ---------- */
.blog-list-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.8rem;
}

.blog-card {
  background: #ffffff;
  border: 1px solid #ddd3f0;
  border-radius: 14px;
  overflow: hidden;
  box-shadow: 0 8px 30px rgba(42, 10, 84, 0.10);
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
}

.blog-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 40px rgba(42, 10, 84, 0.22);
}

.blog-thumbnail {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  display: block;
}

.blog-content {
  padding: 1.2rem 1.3rem 1.5rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.blog-content h2 {
  font-size: 1.08rem;
  line-height: 1.55;
  margin-bottom: 0.5rem;
}

.blog-content h2 a {
  color: #2a0a54;
}

.blog-content time {
  font-size: 0.8rem;
  color: #5b21b6;
  font-weight: 700;
  margin-bottom: 0.6rem;
  display: block;
}

.article-summary {
  font-size: 0.88rem;
  color: #4c4368;
  flex: 1;
  margin-bottom: 0.8rem;
}

.read-more {
  font-size: 0.86rem;
  font-weight: 700;
  color: #5b21b6;
}

/* ---------- サイドバー（ブログ用ブロック） ---------- */
.blog-sidebar {
  min-width: 0;
}

/* ---------- レスポンシブ ---------- */
@media (max-width: 960px) {
  .blog-two-column {
    grid-template-columns: 1fr;
  }

  .blog-sidebar {
    max-width: 560px;
    margin: 0 auto;
    width: 100%;
  }
}

@media (max-width: 640px) {
  .blog-list-grid {
    grid-template-columns: 1fr;
  }
}

/* Mobile news-commentary readability baseline (shared site-local rule). */
@media (max-width: 768px) {
  .blog-main, .blog-container, .two-col-layout { min-width: 0; }
  .article-detail, .blog-article, .article-body { min-width: 0; }
  .article-detail .article-body, .blog-article { padding-inline: 16px; }
  .article-content {
    font-size: 1rem;
    line-height: 1.85;
    overflow-wrap: anywhere;
  }
  .article-content h2 { font-size: clamp(1.25rem, 6vw, 1.45rem); line-height: 1.4; }
  .article-content h3 { font-size: clamp(1.12rem, 5vw, 1.25rem); line-height: 1.45; }
  .article-content :is(img, iframe, video) { max-width: 100%; height: auto; }
  .article-content table { display: block; max-width: 100%; overflow-x: auto; }
  .sidebar, .blog-sidebar { position: static; order: 2; }
}
/* Mobile article reading width: keep outer page gutters, remove duplicated inner gutters. */
@media (max-width: 768px) {
  .article-content,
  .article-detail .article-body,
  .blog-article,
  .main-content > article.main-content {
    padding-left: 0;
    padding-right: 0;
  }
  /* Cap article-panel padding without removing deliberate card framing. */
  .article-panel,
  .article-main,
  .post-content,
  .article-detail {
    padding-left: min(16px, 4vw);
    padding-right: min(16px, 4vw);
  }
  .article-body { padding-left: 0; padding-right: 0; }
}