@charset "UTF-8";
/* ================================================
   # 変数・Mixin
   ================================================ */
/* ================================================
   # シングルブログページ - プロフェッショナル版
   ================================================ */
body {
  background: linear-gradient(135deg, #0a0a0a 0%, rgb(14.9, 14.9, 14.9) 100%);
  color: #e0e0e0;
  font-family: "Noto Sans JP", sans-serif;
  line-height: 1.6;
}

.inner.single-blog-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 3rem 1.5rem;
  display: grid;
  grid-template-columns: 70% 28%;
  gap: 3rem;
  -webkit-box-align: start;
      -ms-flex-align: start;
          align-items: flex-start;
}
@media screen and (max-width: 767.98px) {
  .inner.single-blog-inner {
    grid-template-columns: 1fr;
    gap: 2rem;
    padding: 2rem 1rem;
  }
}

.single-blog-content {
  background: linear-gradient(135deg, #1a1a1a 0%, rgb(32.87, 32.87, 32.87) 100%);
  border: 1px solid rgb(44.32, 44.32, 44.32);
  border-radius: 12px;
  -webkit-box-shadow: 0 4px 20px rgba(0, 0, 0, 0.8);
          box-shadow: 0 4px 20px rgba(0, 0, 0, 0.8);
  padding: 3rem;
  border-top: 4px solid #c93b3b;
  position: relative;
  overflow: hidden;
}
.single-blog-content::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: -webkit-gradient(linear, left top, right top, from(transparent), color-stop(#c93b3b), to(transparent));
  background: linear-gradient(90deg, transparent, #c93b3b, transparent);
}
@media screen and (max-width: 767.98px) {
  .single-blog-content {
    padding: 2rem 1.5rem;
  }
}

/* ================================================
   # パンくずリスト
   ================================================ */
.breadcrumb {
  margin-bottom: 2rem;
}
.breadcrumb .breadcrumb-list {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  list-style: none;
  padding: 0;
  margin: 0;
  font-size: 0.9rem;
  -ms-flex-wrap: wrap;
      flex-wrap: wrap;
}
.breadcrumb .breadcrumb-list li:not(:last-child)::after {
  content: "/";
  color: #888888;
  margin: 0 0.5rem;
}
.breadcrumb .breadcrumb-list li a {
  color: #888888;
  text-decoration: none;
  -webkit-transition: color 0.3s ease;
  transition: color 0.3s ease;
}
.breadcrumb .breadcrumb-list li a:hover {
  color: #c93b3b;
}
.breadcrumb .breadcrumb-list li span {
  color: #e0e0e0;
  font-weight: 500;
}

/* ================================================
   # ヘッダー部分
   ================================================ */
.single-blog-header {
  text-align: center;
  padding-bottom: 6px;
  margin-bottom: 3rem;
  border-bottom: 2px solid #333333;
  position: relative;
}
.single-blog-header::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 50%;
  -webkit-transform: translateX(-50%);
          transform: translateX(-50%);
  width: 80px;
  height: 2px;
  background: -webkit-gradient(linear, left top, right top, from(transparent), color-stop(#c93b3b), to(transparent));
  background: linear-gradient(90deg, transparent, #c93b3b, transparent);
}

.single-blog-title {
  font-size: 2.5rem;
  font-weight: 700;
  line-height: 1.3;
  margin: 0 0 1.5rem;
  background: linear-gradient(135deg, #c93b3b 0%, #d94545 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  color: transparent;
  text-align: center;
}
@media screen and (max-width: 767.98px) {
  .single-blog-title {
    font-size: 2rem;
  }
}

.article-meta-row {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: justify;
      -ms-flex-pack: justify;
          justify-content: space-between;
  -webkit-box-align: start;
      -ms-flex-align: start;
          align-items: flex-start;
  gap: 2rem;
}
@media screen and (max-width: 767.98px) {
  .article-meta-row {
    -webkit-box-orient: vertical;
    -webkit-box-direction: normal;
        -ms-flex-direction: column;
            flex-direction: column;
    gap: 1rem;
  }
}

.article-category .category-badge {
  display: inline-block;
  background: #c93b3b;
  color: white;
  padding: 0.5rem 1rem;
  border-radius: 20px;
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  -webkit-transition: all 0.3s ease;
  transition: all 0.3s ease;
}
.article-category .category-badge:hover {
  background: #d94545;
  -webkit-transform: translateY(-1px);
          transform: translateY(-1px);
}

.single-blog-meta {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: justify;
      -ms-flex-pack: justify;
          justify-content: space-between;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
}
.single-blog-meta .meta-row {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  gap: 2rem;
  -ms-flex-wrap: wrap;
      flex-wrap: wrap;
}
@media screen and (max-width: 767.98px) {
  .single-blog-meta .meta-row {
    -webkit-box-orient: vertical;
    -webkit-box-direction: normal;
        -ms-flex-direction: column;
            flex-direction: column;
    gap: 1rem;
  }
}
.single-blog-meta .meta-item {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
      -ms-flex-direction: column;
          flex-direction: column;
  -webkit-box-align: start;
      -ms-flex-align: start;
          align-items: flex-start;
  font-size: 0.9rem;
}
@media screen and (max-width: 767.98px) {
  .single-blog-meta .meta-item {
    -webkit-box-align: center;
        -ms-flex-align: center;
            align-items: center;
  }
}
.single-blog-meta .meta-item .meta-label {
  color: #888888;
  font-size: 0.8rem;
  line-height: 1;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 2px;
}
.single-blog-meta .meta-item .meta-value {
  color: #e0e0e0;
  font-weight: 600;
  line-height: 1;
}

/* ================================================
   # 目次
   ================================================ */
.table-of-contents {
  background: linear-gradient(135deg, #2a2a2a 0%, rgb(48.39, 48.39, 48.39) 100%);
  border: 1px solid rgb(59.04, 59.04, 59.04);
  border-radius: 12px;
  -webkit-box-shadow: 0 4px 20px rgba(0, 0, 0, 0.8);
          box-shadow: 0 4px 20px rgba(0, 0, 0, 0.8);
  padding: 1.5rem;
  margin-bottom: 3rem;
  border-left: 4px solid #c93b3b;
}
.table-of-contents .toc-header {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: justify;
      -ms-flex-pack: justify;
          justify-content: space-between;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  margin-bottom: 0;
}
.table-of-contents .toc-header .toc-title {
  color: #c93b3b;
  font-size: 1.1rem;
  margin: 0;
  font-weight: 600;
}
.table-of-contents .toc-header .toc-toggle {
  background: none;
  border: 2px solid #333333;
  border-radius: 50%;
  width: 2rem;
  height: 2rem;
  cursor: pointer;
  -webkit-transition: all 0.3s ease;
  transition: all 0.3s ease;
  position: relative;
}
.table-of-contents .toc-header .toc-toggle:hover {
  border-color: #c93b3b;
}
.table-of-contents .toc-header .toc-toggle.is-active .toc-toggle-icon {
  -webkit-transform: translate(-50%, -50%) rotate(180deg);
          transform: translate(-50%, -50%) rotate(180deg);
}
.table-of-contents .toc-header .toc-toggle .toc-toggle-icon {
  position: absolute;
  top: 50%;
  left: 50%;
  -webkit-transform: translate(-50%, -50%);
          transform: translate(-50%, -50%);
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 6px solid #e0e0e0;
  -webkit-transition: -webkit-transform 0.3s ease;
  transition: -webkit-transform 0.3s ease;
  transition: transform 0.3s ease;
  transition: transform 0.3s ease, -webkit-transform 0.3s ease;
}
.table-of-contents .toc-content {
  overflow: hidden;
  -webkit-transition: max-height 0.4s ease-out;
  transition: max-height 0.4s ease-out;
}
@media screen and (max-width: 767.98px) {
  .table-of-contents .toc-content {
    max-height: 0;
  }
  .table-of-contents .toc-content.is-open {
    max-height: 500px;
  }
}
@media screen and (min-width: 768px) {
  .table-of-contents .toc-content.is-open {
    max-height: 500px;
  }
  .table-of-contents .toc-content:not(.is-open) {
    max-height: 0;
  }
}
.table-of-contents .toc-list {
  list-style: none;
  padding: 0;
  margin: 0;
  padding-top: 1rem;
}
.table-of-contents .toc-list .toc-item {
  margin-bottom: 0.5rem;
}
.table-of-contents .toc-list .toc-item.toc-h3 {
  margin-left: 1rem;
  font-size: 0.9rem;
}
.table-of-contents .toc-list .toc-item .toc-link {
  color: #e0e0e0;
  text-decoration: none;
  display: block;
  padding: 0.5rem 0.8rem;
  border-radius: 6px;
  -webkit-transition: all 0.3s ease;
  transition: all 0.3s ease;
  border-left: 2px solid transparent;
}
.table-of-contents .toc-list .toc-item .toc-link:hover {
  background: rgb(52.65, 52.65, 52.65);
  border-left-color: #c93b3b;
  padding-left: 1rem;
}

/* ================================================
   # サムネイル
   ================================================ */
.single-blog-thumbnail {
  margin-bottom: 3rem;
}
.single-blog-thumbnail .featured-image {
  margin: 0;
  border-radius: 12px;
  overflow: hidden;
  -webkit-box-shadow: 0 8px 30px rgba(0, 0, 0, 0.8);
          box-shadow: 0 8px 30px rgba(0, 0, 0, 0.8);
}
.single-blog-thumbnail .featured-image img {
  width: 100%;
  height: auto;
  max-height: 500px;
  -o-object-fit: cover;
     object-fit: cover;
  display: block;
  -webkit-transition: -webkit-transform 0.3s ease;
  transition: -webkit-transform 0.3s ease;
  transition: transform 0.3s ease;
  transition: transform 0.3s ease, -webkit-transform 0.3s ease;
}
.single-blog-thumbnail .featured-image:hover img {
  -webkit-transform: scale(1.02);
          transform: scale(1.02);
}
.single-blog-thumbnail .featured-image .image-caption {
  background: rgb(52.65, 52.65, 52.65);
  padding: 1rem;
  font-size: 0.9rem;
  color: #888888;
  font-style: italic;
  text-align: center;
}

/* ================================================
   # 記事概要
   ================================================ */
.article-summary {
  background: linear-gradient(135deg, #2a2a2a 0%, rgb(48.39, 48.39, 48.39) 100%);
  border: 1px solid rgb(59.04, 59.04, 59.04);
  border-radius: 12px;
  -webkit-box-shadow: 0 4px 20px rgba(0, 0, 0, 0.8);
          box-shadow: 0 4px 20px rgba(0, 0, 0, 0.8);
  padding: 2rem;
  margin-bottom: 3rem;
  border-left: 4px solid #c93b3b;
}
.article-summary .summary-title {
  color: #c93b3b;
  font-size: 1.2rem;
  margin: 0 0 1rem;
  font-weight: 600;
}
.article-summary .summary-text {
  font-size: 1.1rem;
  line-height: 1.7;
  color: rgb(225.55, 225.55, 225.55);
}

/* ================================================
   # メインコンテンツ
   ================================================ */
.single-blog-entry {
  line-height: 1.8;
  font-size: 1rem;
  color: #e0e0e0;
}
.single-blog-entry p {
  margin-bottom: 1.5em;
}
.single-blog-entry h2, .single-blog-entry h3, .single-blog-entry h4, .single-blog-entry h5, .single-blog-entry h6 {
  margin-top: 3em;
  margin-bottom: 1em;
  color: #c93b3b;
  font-weight: 600;
  scroll-margin-top: 100px;
}
.single-blog-entry h2 {
  font-size: 1.8rem;
  border-bottom: 2px solid #333333;
  padding-bottom: 0.5rem;
  position: relative;
}
.single-blog-entry h2::before {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 50px;
  height: 2px;
  background: #c93b3b;
}
.single-blog-entry h3 {
  font-size: 1.5rem;
  border-left: 4px solid #c93b3b;
  padding-left: 1rem;
}
.single-blog-entry h4 {
  font-size: 1.3rem;
  color: rgb(206.4, 78.6, 78.6);
}
.single-blog-entry blockquote {
  background: linear-gradient(135deg, #2a2a2a 0%, rgb(48.39, 48.39, 48.39) 100%);
  border: 1px solid rgb(59.04, 59.04, 59.04);
  border-radius: 12px;
  -webkit-box-shadow: 0 4px 20px rgba(0, 0, 0, 0.8);
          box-shadow: 0 4px 20px rgba(0, 0, 0, 0.8);
  padding: 1.5rem;
  margin: 2em 0;
  border-left: 4px solid #c93b3b;
  font-style: italic;
  position: relative;
}
.single-blog-entry blockquote::before {
  content: "";
  position: absolute;
  top: -10px;
  left: 15px;
  font-size: 3rem;
  color: #c93b3b;
  line-height: 1;
}
.single-blog-entry blockquote p {
  margin: 0;
  padding-left: 2rem;
}
.single-blog-entry ul, .single-blog-entry ol {
  padding-left: 2rem;
  margin-bottom: 1.5em;
}
.single-blog-entry ul li, .single-blog-entry ol li {
  margin-bottom: 0.5em;
}
.single-blog-entry img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  -webkit-box-shadow: 0 4px 15px rgba(0, 0, 0, 0.8);
          box-shadow: 0 4px 15px rgba(0, 0, 0, 0.8);
  margin: 2em 0;
}
.single-blog-entry code {
  background: rgb(52.65, 52.65, 52.65);
  padding: 0.2em 0.4em;
  border-radius: 4px;
  color: #c93b3b;
  font-family: "Courier New", monospace;
  font-size: 0.9em;
}
.single-blog-entry pre {
  background: linear-gradient(135deg, #2a2a2a 0%, rgb(48.39, 48.39, 48.39) 100%);
  border: 1px solid rgb(59.04, 59.04, 59.04);
  border-radius: 12px;
  -webkit-box-shadow: 0 4px 20px rgba(0, 0, 0, 0.8);
          box-shadow: 0 4px 20px rgba(0, 0, 0, 0.8);
  padding: 1.5rem;
  overflow-x: auto;
  border-radius: 8px;
  margin: 2em 0;
}
.single-blog-entry pre code {
  background: none;
  padding: 0;
  color: #e0e0e0;
}
.single-blog-entry table {
  width: 100%;
  border-collapse: collapse;
  margin: 2em 0;
  background: #2a2a2a;
  border-radius: 8px;
  overflow: hidden;
  -webkit-box-shadow: 0 4px 15px rgba(0, 0, 0, 0.8);
          box-shadow: 0 4px 15px rgba(0, 0, 0, 0.8);
}
.single-blog-entry table th, .single-blog-entry table td {
  padding: 1rem;
  text-align: left;
  border-bottom: 1px solid #333333;
}
.single-blog-entry table th {
  background: rgb(52.65, 52.65, 52.65);
  color: #c93b3b;
  font-weight: 600;
}
.single-blog-entry table tr:last-child td {
  border-bottom: none;
}

.page-links {
  margin: 2rem 0;
  text-align: center;
}
.page-links .page-links-title {
  color: #c93b3b;
  font-weight: 600;
  margin-right: 1rem;
}
.page-links a, .page-links span {
  display: inline-block;
  padding: 0.5rem 1rem;
  margin: 0 0.2rem;
  background: #2a2a2a;
  border: 1px solid #333333;
  border-radius: 6px;
  text-decoration: none;
  color: #e0e0e0;
  -webkit-transition: all 0.3s ease;
  transition: all 0.3s ease;
}
.page-links a:hover, .page-links span:hover {
  background: #c93b3b;
  border-color: #c93b3b;
  color: white;
}
.page-links .current {
  background: #c93b3b;
  border-color: #c93b3b;
  color: white;
}

/* ================================================
   # 記事アクション（評価・シェア）
   ================================================ */
.article-actions {
  background: linear-gradient(135deg, #2a2a2a 0%, rgb(48.39, 48.39, 48.39) 100%);
  border: 1px solid rgb(59.04, 59.04, 59.04);
  border-radius: 12px;
  -webkit-box-shadow: 0 4px 20px rgba(0, 0, 0, 0.8);
          box-shadow: 0 4px 20px rgba(0, 0, 0, 0.8);
  padding: 2.5rem;
  margin: 3rem 0;
  text-align: center;
}
.article-actions .article-rating {
  margin-bottom: 2.5rem;
}
.article-actions .article-rating .rating-title {
  color: #c93b3b;
  font-size: 1.3rem;
  margin-bottom: 1.5rem;
  font-weight: 600;
}
.article-actions .article-rating .rating-buttons {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  gap: 1rem;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
}
@media screen and (max-width: 767.98px) {
  .article-actions .article-rating .rating-buttons {
    -webkit-box-orient: vertical;
    -webkit-box-direction: normal;
        -ms-flex-direction: column;
            flex-direction: column;
    -webkit-box-align: center;
        -ms-flex-align: center;
            align-items: center;
  }
}
.article-actions .article-rating .rating-buttons .rating-btn {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  gap: 0.5rem;
  background: rgb(52.65, 52.65, 52.65);
  color: #e0e0e0;
  border: 2px solid #333333;
  padding: 1rem 2rem;
  border-radius: 30px;
  cursor: pointer;
  -webkit-transition: all 0.3s ease;
  transition: all 0.3s ease;
  font-weight: 600;
  min-width: 180px;
}
.article-actions .article-rating .rating-buttons .rating-btn .btn-icon {
  font-size: 1.2rem;
  font-weight: bold;
}
.article-actions .article-rating .rating-buttons .rating-btn:hover {
  border-color: #c93b3b;
  background: rgba(201, 59, 59, 0.2);
}
.article-actions .article-rating .rating-buttons .rating-btn.clicked {
  background: #c93b3b;
  border-color: #c93b3b;
  color: white;
}
.article-actions .article-rating .rating-buttons .rating-btn.clicked:hover {
  background: #d94545;
}
.article-actions .article-rating .rating-buttons .rating-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}
.article-actions .social-share .share-title {
  color: #c93b3b;
  font-size: 1.3rem;
  margin-bottom: 1.5rem;
  font-weight: 600;
}

/* ================================================
   # フッター部分（タグ・カテゴリー）
   ================================================ */
.single-blog-footer {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 2px solid #333333;
}
.single-blog-footer .post-taxonomy {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}
@media screen and (max-width: 767.98px) {
  .single-blog-footer .post-taxonomy {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
}
.single-blog-footer .post-taxonomy .taxonomy-section .taxonomy-title {
  color: #c93b3b;
  font-size: 1.1rem;
  margin-bottom: 1rem;
  font-weight: 600;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
}
.single-blog-footer .post-taxonomy .taxonomy-section .taxonomy-title::before {
  content: "";
  width: 4px;
  height: 1.2rem;
  background: #c93b3b;
  margin-right: 0.5rem;
  border-radius: 2px;
}
.single-blog-footer .post-taxonomy .taxonomy-section .taxonomy-list a {
  display: inline-block;
  color: #e0e0e0;
  text-decoration: none;
  background: rgb(48.39, 48.39, 48.39);
  padding: 0.5rem 1rem;
  border-radius: 20px;
  margin: 0 0.5rem 0.5rem 0;
  font-size: 0.9rem;
  border: 1px solid #333333;
  -webkit-transition: all 0.3s ease;
  transition: all 0.3s ease;
}
.single-blog-footer .post-taxonomy .taxonomy-section .taxonomy-list a:hover {
  background: #c93b3b;
  border-color: #c93b3b;
  color: white;
  -webkit-transform: translateY(-1px);
          transform: translateY(-1px);
}
.single-blog-footer .post-taxonomy .taxonomy-section .taxonomy-list.tags a {
  font-size: 0.8rem;
  padding: 0.4rem 0.8rem;
}
.single-blog-footer .post-taxonomy .taxonomy-section .taxonomy-list.tags a::before {
  content: "#";
  opacity: 0.7;
  margin-right: 0.2rem;
}

/* ================================================
   # 関連記事
   ================================================ */
.related-posts {
  background: linear-gradient(135deg, #2a2a2a 0%, rgb(48.39, 48.39, 48.39) 100%);
  border: 1px solid rgb(59.04, 59.04, 59.04);
  border-radius: 12px;
  -webkit-box-shadow: 0 4px 20px rgba(0, 0, 0, 0.8);
          box-shadow: 0 4px 20px rgba(0, 0, 0, 0.8);
  padding: 2.5rem;
  margin: 3rem 0;
}
.related-posts .related-title {
  color: #c93b3b;
  font-size: 1.5rem;
  margin-bottom: 2rem;
  text-align: center;
  font-weight: 700;
  position: relative;
}
.related-posts .related-title::after {
  content: "";
  position: absolute;
  bottom: -8px;
  left: 50%;
  -webkit-transform: translateX(-50%);
          transform: translateX(-50%);
  width: 60px;
  height: 2px;
  background: #c93b3b;
}
.related-posts .related-posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}
.related-posts .related-posts-grid .related-post-item {
  background: linear-gradient(135deg, rgb(48.39, 48.39, 48.39) 0%, rgb(54.5883, 54.5883, 54.5883) 100%);
  border: 1px solid rgb(64.9188, 64.9188, 64.9188);
  border-radius: 12px;
  -webkit-box-shadow: 0 4px 20px rgba(0, 0, 0, 0.8);
          box-shadow: 0 4px 20px rgba(0, 0, 0, 0.8);
  overflow: hidden;
  -webkit-transition: all 0.3s ease;
  transition: all 0.3s ease;
}
.related-posts .related-posts-grid .related-post-item:hover {
  -webkit-transform: translateY(-2px);
          transform: translateY(-2px);
  -webkit-box-shadow: 0 8px 30px rgba(0, 0, 0, 0.8);
          box-shadow: 0 8px 30px rgba(0, 0, 0, 0.8);
}
.related-posts .related-posts-grid .related-post-item .related-post-link {
  text-decoration: none;
  color: inherit;
  display: block;
  height: 100%;
}
.related-posts .related-posts-grid .related-post-item .related-post-image {
  aspect-ratio: 16/9;
  overflow: hidden;
  position: relative;
}
.related-posts .related-posts-grid .related-post-item .related-post-image img {
  width: 100%;
  height: 100%;
  -o-object-fit: cover;
     object-fit: cover;
  -webkit-transition: -webkit-transform 0.3s ease;
  transition: -webkit-transform 0.3s ease;
  transition: transform 0.3s ease;
  transition: transform 0.3s ease, -webkit-transform 0.3s ease;
}
.related-posts .related-posts-grid .related-post-item .related-post-image .no-image {
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgb(63.3, 63.3, 63.3) 0%, #2a2a2a 100%);
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
}
.related-posts .related-posts-grid .related-post-item .related-post-image .no-image .no-image-text {
  color: #888888;
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 1px;
}
.related-posts .related-posts-grid .related-post-item:hover .related-post-image img {
  -webkit-transform: scale(1.05);
          transform: scale(1.05);
}
.related-posts .related-posts-grid .related-post-item .related-post-content {
  padding: 1.5rem;
}
.related-posts .related-posts-grid .related-post-item .related-post-content .related-post-meta {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: justify;
      -ms-flex-pack: justify;
          justify-content: space-between;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  margin-bottom: 0.8rem;
  font-size: 0.8rem;
}
.related-posts .related-posts-grid .related-post-item .related-post-content .related-post-meta .related-post-date {
  color: #888888;
}
.related-posts .related-posts-grid .related-post-item .related-post-content .related-post-meta .related-post-category {
  background: #c93b3b;
  color: white;
  padding: 0.2rem 0.6rem;
  border-radius: 10px;
  font-size: 0.7rem;
  font-weight: 600;
}
.related-posts .related-posts-grid .related-post-item .related-post-content .related-post-title {
  color: #e0e0e0;
  font-size: 1rem;
  margin: 0;
  line-height: 1.4;
  font-weight: 600;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  line-clamp: 2;
  overflow: hidden;
}
.related-posts .related-posts-grid .related-post-item .related-post-content .related-post-title:hover {
  color: #c93b3b;
}
.related-posts .related-posts-grid .no-related {
  grid-column: 1/-1;
  text-align: center;
  padding: 2rem;
}
.related-posts .related-posts-grid .no-related p {
  color: #888888;
  margin-bottom: 1.5rem;
  font-size: 1.1rem;
}
.related-posts .related-posts-grid .no-related .back-to-blog {
  display: inline-block;
  background: #c93b3b;
  color: white;
  padding: 0.8rem 2rem;
  border-radius: 25px;
  text-decoration: none;
  font-weight: 600;
  -webkit-transition: all 0.3s ease;
  transition: all 0.3s ease;
}
.related-posts .related-posts-grid .no-related .back-to-blog:hover {
  background: #d94545;
  -webkit-transform: translateY(-2px);
          transform: translateY(-2px);
}

/* ================================================
   # 記事ナビゲーション
   ================================================ */
.post-navigation {
  margin: 3rem 0;
}
.post-navigation .screen-reader-text {
  position: absolute !important;
  clip: rect(1px, 1px, 1px, 1px);
  padding: 0 !important;
  border: 0 !important;
  height: 1px !important;
  width: 1px !important;
  overflow: hidden;
}
.post-navigation .nav-links {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}
@media screen and (max-width: 767.98px) {
  .post-navigation .nav-links {
    grid-template-columns: 1fr;
  }
}
.post-navigation .nav-links .nav-previous,
.post-navigation .nav-links .nav-next {
  background: linear-gradient(135deg, #2a2a2a 0%, rgb(48.39, 48.39, 48.39) 100%);
  border: 1px solid rgb(59.04, 59.04, 59.04);
  border-radius: 12px;
  -webkit-box-shadow: 0 4px 20px rgba(0, 0, 0, 0.8);
          box-shadow: 0 4px 20px rgba(0, 0, 0, 0.8);
  -webkit-transition: all 0.3s ease;
  transition: all 0.3s ease;
}
.post-navigation .nav-links .nav-previous:hover,
.post-navigation .nav-links .nav-next:hover {
  -webkit-transform: translateY(-2px);
          transform: translateY(-2px);
  -webkit-box-shadow: 0 8px 30px rgba(0, 0, 0, 0.8);
          box-shadow: 0 8px 30px rgba(0, 0, 0, 0.8);
}
.post-navigation .nav-links .nav-previous .nav-link,
.post-navigation .nav-links .nav-next .nav-link {
  display: block;
  padding: 1.5rem;
  text-decoration: none;
  color: inherit;
  height: 100%;
  position: relative;
}
.post-navigation .nav-links .nav-previous .nav-link .nav-direction,
.post-navigation .nav-links .nav-next .nav-link .nav-direction {
  display: block;
  color: #c93b3b;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.post-navigation .nav-links .nav-previous .nav-link .nav-title,
.post-navigation .nav-links .nav-next .nav-link .nav-title {
  display: block;
  color: #e0e0e0;
  line-height: 1.4;
  font-weight: 600;
  font-size: 1.1rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  line-clamp: 2;
  overflow: hidden;
}
.post-navigation .nav-links .nav-previous .nav-link .nav-arrow,
.post-navigation .nav-links .nav-next .nav-link .nav-arrow {
  position: absolute;
  top: 50%;
  -webkit-transform: translateY(-50%);
          transform: translateY(-50%);
  font-size: 1.5rem;
  color: #c93b3b;
  -webkit-transition: -webkit-transform 0.3s ease;
  transition: -webkit-transform 0.3s ease;
  transition: transform 0.3s ease;
  transition: transform 0.3s ease, -webkit-transform 0.3s ease;
}
.post-navigation .nav-links .nav-previous:hover .nav-arrow,
.post-navigation .nav-links .nav-next:hover .nav-arrow {
  -webkit-transform: translateY(-50%) scale(1.2);
          transform: translateY(-50%) scale(1.2);
}
.post-navigation .nav-links .nav-previous .nav-arrow {
  left: 1rem;
}
.post-navigation .nav-links .nav-previous .nav-link {
  padding-left: 3rem;
}
.post-navigation .nav-links .nav-next {
  text-align: right;
}
.post-navigation .nav-links .nav-next .nav-arrow {
  right: 1rem;
}
.post-navigation .nav-links .nav-next .nav-link {
  padding-right: 3rem;
}
@media screen and (max-width: 767.98px) {
  .post-navigation .nav-links .nav-next {
    text-align: left;
  }
  .post-navigation .nav-links .nav-next .nav-link {
    padding-right: 1.5rem;
    padding-left: 3rem;
  }
  .post-navigation .nav-links .nav-next .nav-arrow {
    left: 1rem;
    right: auto;
  }
}

/* ================================================
   # レスポンシブ調整
   ================================================ */
@media screen and (max-width: 767.98px) {
  .single-blog-content {
    border-radius: 0;
    margin: 0 -1rem;
  }
  .related-posts-grid {
    grid-template-columns: 1fr !important;
  }
}
/* ================================================
   # アニメーション効果
   ================================================ */
@-webkit-keyframes fadeInUp {
  from {
    opacity: 0;
    -webkit-transform: translateY(30px);
            transform: translateY(30px);
  }
  to {
    opacity: 1;
    -webkit-transform: translateY(0);
            transform: translateY(0);
  }
}
@keyframes fadeInUp {
  from {
    opacity: 0;
    -webkit-transform: translateY(30px);
            transform: translateY(30px);
  }
  to {
    opacity: 1;
    -webkit-transform: translateY(0);
            transform: translateY(0);
  }
}
.single-blog-content {
  -webkit-animation: fadeInUp 0.8s ease-out;
          animation: fadeInUp 0.8s ease-out;
}

.table-of-contents,
.article-summary,
.related-posts,
.post-navigation {
  -webkit-animation: fadeInUp 0.6s ease-out;
          animation: fadeInUp 0.6s ease-out;
  -webkit-animation-fill-mode: both;
          animation-fill-mode: both;
}

.table-of-contents {
  -webkit-animation-delay: 0.1s;
          animation-delay: 0.1s;
}

.article-summary {
  -webkit-animation-delay: 0.2s;
          animation-delay: 0.2s;
}

.related-posts {
  -webkit-animation-delay: 0.3s;
          animation-delay: 0.3s;
}

.post-navigation {
  -webkit-animation-delay: 0.4s;
          animation-delay: 0.4s;
}

/* ================================================
   # アクセシビリティ対応
   ================================================ */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    -webkit-animation-duration: 0.01ms !important;
            animation-duration: 0.01ms !important;
    -webkit-animation-iteration-count: 1 !important;
            animation-iteration-count: 1 !important;
    -webkit-transition-duration: 0.01ms !important;
            transition-duration: 0.01ms !important;
  }
}