@charset "UTF-8";

/* ===========================
   single.css
   個別投稿ページ専用スタイル

   ※ main.cssで定義済みのため省略したもの：
      :root / * / body / img / a
      .section-label / .section-title / .section-desc
      section { padding }
      .btn-primary / .btn-secondary
      header / footer / .breadcrumb
      レスポンシブ section { padding }
=========================== */

/* ===========================
   紺背景ヘッダー
=========================== */
.single-header {
  background: linear-gradient(135deg, #1a2744 0%, #1e3a5f 60%, #1a3550 100%);
  padding: 100px 80px 64px;
  margin-top: 68px;
}
.single-header-inner {
  max-width: 780px;
  margin: 0 auto;
}
/* パンくずリスト（紺背景内） */
.single-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px !important;
  margin-top: 20px;
  color: rgba(255,255,255,0.5) !important;
  flex-wrap: wrap;
  line-height: 1.6;
}
.single-breadcrumb span {
  color: rgba(255,255,255,0.5) !important;
  font-size: 13px !important;
}
.single-breadcrumb a {
  color: rgba(255,255,255,0.7) !important;
  text-decoration: none;
  transition: color 0.2s;
  font-size: 13px !important;
  display: inline !important;
}
.single-breadcrumb a:hover {
  color: var(--teal) !important;
}

.single-header .section-label {
  color: var(--teal);
}
.single-header .section-label::before {
  background: var(--teal);
}
.single-header .section-title {
  color: var(--white);
  font-size: clamp(22px, 3vw, 34px);
  margin-bottom: 16px;
}
.single-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.single-meta time {
  font-size: 14px;
  color: rgba(255,255,255,0.7);
}
.single-cat {
  font-size: 12px;
  background: var(--teal);
  color: var(--navy);
  padding: 3px 12px;
  border-radius: 100px;
  font-weight: 700;
}

/* ===========================
   本文エリア
=========================== */
.single-body {
  padding: 64px 80px;
  background: var(--white);
}
.single-inner {
  max-width: 780px;
  margin: 0 auto;
}

/* アイキャッチ画像 */
.single-thumbnail {
  margin-bottom: 48px;
  border-radius: 12px;
  overflow: hidden;
}
.single-thumbnail img {
  width: 100%;
  height: auto;
}

/* 目次 */
.single-toc {
  background: var(--bg2);
  border-radius: 12px;
  padding: 28px 32px;
  margin-bottom: 48px;
  overflow: hidden;
}
.single-toc-title {
  font-family: 'Shippori Mincho', serif;
  font-size: 20px;
  font-weight: 700;
  color: var(--navy);
  margin: 0 0 12px;
  padding: 0 0 10px;
  border-bottom: 2px solid var(--teal);
  border-left: none;
  line-height: 1.5;
}
.single-toc-list {
  margin: 0;
  padding-left: 24px;
  list-style: decimal;
  line-height: 2.2;
}
.single-toc-list li {
  margin-bottom: 4px;
  font-size: 15px;
}
.single-toc-list a {
  color: var(--text);
  text-decoration: none;
  transition: color 0.2s;
}
.single-toc-list a:hover {
  color: var(--teal-dark);
}

/* 見出しアンカーのスクロール位置調整（固定ヘッダー分） */
.single-inner h2[id],
.single-inner h3[id] {
  scroll-margin-top: 88px;
}

/* 本文内の見出し */
.single-inner h2 {
  font-family: 'Shippori Mincho', serif;
  font-size: clamp(20px, 2.5vw, 28px);
  color: var(--navy);
  margin: 48px 0 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--teal);
  line-height: 1.6;
}
.single-inner h3 {
  font-size: clamp(18px, 2vw, 22px);
  color: var(--navy);
  margin: 36px 0 16px;
  padding-left: 16px;
  border-left: 4px solid var(--teal);
  line-height: 1.6;
}
.single-inner h4 {
  font-size: 18px;
  color: var(--navy);
  margin: 28px 0 12px;
  font-weight: 700;
}

/* 本文の段落・リスト */
.single-inner p {
  margin-bottom: 24px;
  color: var(--text);
  line-height: 2.2;
}
.single-inner ul,
.single-inner ol {
  margin: 16px 0 24px 24px;
  line-height: 2.2;
}
.single-inner li {
  margin-bottom: 8px;
}

/* 本文内のリンク */
.single-inner a {
  color: var(--teal-dark);
  text-decoration: underline;
  transition: color 0.2s;
}
.single-inner a:hover {
  color: var(--navy);
}

/* 本文内の画像 */
.single-inner img {
  border-radius: 8px;
  margin: 24px 0;
}

/* 引用 */
.single-inner blockquote {
  background: var(--teal-pale);
  border-left: 4px solid var(--teal);
  padding: 24px 28px;
  margin: 24px 0;
  border-radius: 0 8px 8px 0;
  font-size: 15px;
  color: var(--text-light);
  line-height: 2;
}
.single-inner blockquote p {
  margin-bottom: 0;
}

/* テーブル */
.single-inner table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
}
.single-inner th,
.single-inner td {
  border: 1px solid var(--border);
  padding: 12px 16px;
  text-align: left;
  font-size: 15px;
}
.single-inner th {
  background: var(--teal-pale);
  font-weight: 700;
  color: var(--navy);
}

/* コードブロック */
.single-inner pre {
  background: #1a2744;
  color: #e2e8f0;
  padding: 24px;
  border-radius: 8px;
  overflow-x: auto;
  margin: 24px 0;
  font-size: 14px;
  line-height: 1.8;
}
.single-inner code {
  background: var(--bg2);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 14px;
}
.single-inner pre code {
  background: none;
  padding: 0;
}

/* ===========================
   前後の記事ナビ
=========================== */
.single-nav {
  background: var(--bg2);
  padding: 48px 80px;
}
.single-nav-inner {
  max-width: 780px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  gap: 24px;
}
.single-nav-link {
  display: flex;
  flex-direction: column;
  gap: 6px;
  text-decoration: none;
  padding: 20px 24px;
  background: var(--white);
  border-radius: 10px;
  border: 1px solid var(--border);
  transition: all 0.2s;
  flex: 1;
  max-width: 48%;
}
.single-nav-link:hover {
  border-color: var(--teal);
  box-shadow: 0 2px 12px rgba(130,216,208,0.15);
}
.single-nav-link.next {
  text-align: right;
  margin-left: auto;
}
.single-nav-label {
  font-size: 13px;
  color: var(--teal-dark);
  font-weight: 700;
}
.single-nav-title {
  font-size: 15px;
  color: var(--navy);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ===========================
   CTA セクション
=========================== */
.single-cta {
  background: linear-gradient(135deg, #1a2744 0%, #1e3a5f 60%, #1a3550 100%);
  padding: 80px 80px;
  text-align: center;
}
.single-cta .section-label {
  color: var(--teal);
  justify-content: center;
}
.single-cta .section-label::before {
  background: var(--teal);
}
.single-cta .section-title {
  color: var(--white);
  margin-bottom: 32px;
}
.single-cta-btns {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* ===========================
   レスポンシブ：タブレット以下
=========================== */
@media (max-width: 900px) {
  .single-header {
    padding: 88px 28px 48px;
  }
  .single-body {
    padding: 48px 28px;
  }
  .single-nav {
    padding: 36px 28px;
  }
  .single-nav-inner {
    flex-direction: column;
  }
  .single-nav-link {
    max-width: 100%;
  }
  .single-nav-link.next {
    text-align: left;
  }
  .single-cta {
    padding: 64px 28px;
  }
}

/* ===========================
   レスポンシブ：スマホ
=========================== */
@media (max-width: 600px) {
  .single-header .section-title {
    font-size: 22px;
  }
  .single-inner h2 {
    font-size: 20px;
  }
  .single-inner h3 {
    font-size: 18px;
  }
  .single-cta-btns {
    flex-direction: column;
    align-items: center;
  }
}