/* ブログレイアウト・サイドバー */
.blog-body {
  padding-bottom: 0;
}

.blog-main {
  padding: 40px 0 64px;
}

.blog-container {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 48px;
  align-items: start;
}

.blog-content {
  min-width: 0;
}

.blog-page-title {
  font-size: 24px;
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 2px solid #ff8f4e;
}

.blog-empty {
  color: #666;
  font-size: 14px;
}

/* 一覧 */
.blog-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.blog-list-item {
  border-bottom: 1px solid #e5e0d8;
  padding: 20px 0;
}

.blog-list-item:first-child {
  padding-top: 0;
}

.blog-list-date {
  display: block;
  font-size: 12px;
  color: #888;
  margin-bottom: 4px;
}

.blog-list-title {
  font-size: 18px;
  margin: 0 0 8px;
}

.blog-list-title a:hover {
  color: #ff8f4e;
}

.blog-list-excerpt {
  font-size: 13px;
  color: #555;
  margin: 0;
  line-height: 1.6;
}

/* 単体記事 */
.blog-single-header {
  margin-bottom: 24px;
}

.blog-single-date {
  display: block;
  font-size: 13px;
  color: #888;
  margin-bottom: 8px;
}

.blog-single-title {
  font-size: 22px;
  margin: 0;
  line-height: 1.4;
}

/* 目次（SEO・ユーザビリティ） */
.blog-toc {
  margin-bottom: 32px;
  padding: 20px;
  background: #f9f6ec;
  border: 1px solid #e5e0d8;
  border-radius: 12px;
}

.blog-toc-title {
  font-size: 14px;
  font-weight: 700;
  margin: 0 0 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid #ddd4c6;
  color: #454545;
}

.blog-toc-list {
  list-style: none;
  padding: 0;
  margin: 0;
  counter-reset: toc;
}

.blog-toc-item {
  margin-bottom: 6px;
  font-size: 14px;
  line-height: 1.5;
}

.blog-toc-item a {
  color: #454545;
  text-decoration: none;
}

.blog-toc-item a:hover {
  color: #ff8f4e;
  text-decoration: underline;
}

.blog-toc-level-2 {
  padding-left: 0;
}

.blog-toc-level-3 {
  padding-left: 1em;
  font-size: 13px;
}

.blog-single-body {
  font-size: 15px;
  line-height: 1.8;
}

/* アンカーリンク飛び先の余白（固定ヘッダー考慮） */
.blog-single-body h2,
.blog-single-body h3 {
  scroll-margin-top: 88px;
}

.blog-single-body h3 {
  font-size: 16px;
  margin: 24px 0 8px;
  padding-bottom: 4px;
  border-bottom: 1px solid #e5e0d8;
}

.blog-single-body ul,
.blog-single-body ol {
  margin: 12px 0;
  padding-left: 1.5em;
}

.blog-single-body li {
  margin-bottom: 4px;
}

.blog-single-body p {
  margin: 0 0 1em;
}

.blog-single-back {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid #e5e0d8;
}

/* サイドバー */
.blog-sidebar {
  position: sticky;
  top: 80px;
  background: #f9f6ec;
  border-radius: 16px;
  padding: 20px;
  border: 1px solid #e5e0d8;
}

.blog-sidebar-block {
  margin-bottom: 24px;
}

.blog-sidebar-block:last-child {
  margin-bottom: 0;
}

.blog-sidebar-title {
  font-size: 14px;
  font-weight: 700;
  margin: 0 0 12px;
  padding-bottom: 6px;
  border-bottom: 1px solid #ddd4c6;
  color: #454545;
}

.blog-archive-list,
.blog-recent-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.blog-archive-list li,
.blog-recent-list li {
  margin-bottom: 6px;
}

.blog-archive-list a,
.blog-recent-list a {
  font-size: 13px;
  color: #454545;
}

.blog-archive-list a:hover,
.blog-recent-list a:hover {
  color: #ff8f4e;
}

.blog-archive-list a.is-current,
.blog-recent-list a.is-current {
  color: #ff8f4e;
  font-weight: 700;
}

.blog-archive-count {
  color: #888;
  font-weight: normal;
}

.blog-recent-list li {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.blog-recent-date {
  font-size: 11px;
  color: #888;
}

.logo-link {
  display: flex;
  align-items: center;
  gap: 8px;
  color: inherit;
}

.nav-current {
  font-weight: 700;
}

@media (max-width: 900px) {
  .blog-container {
    grid-template-columns: minmax(0, 1fr);
  }

  .blog-sidebar {
    position: static;
    /* モバイルではコンテンツの後・フッター直前に表示 */
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
  }
}

@media (max-width: 640px) {
  .blog-sidebar {
    grid-template-columns: minmax(0, 1fr);
  }

  .blog-main {
    padding: 24px 0 48px;
  }
}