/* ===============================
   記事詳細
================================ */

.back-link {
  display: block;
  max-width: 1000px;
  margin: 0 auto 32px;

  color: #2b6cb0;
  text-decoration: none;
  font-size: 16px;
}

.single-page {
  background: #f5f8f4;
  min-height: 100vh;
  padding: 48px 24px 80px;
}

.single-card {
  background: #fff;
  border-radius: 20px;
  padding: 48px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.08);
}

/* カテゴリ */
.single-category {
  display: inline-block;
  margin-bottom: 20px;
  padding: 8px 14px;
  border-radius: 10px;
  background: #e5f4ea;
  color: #0b7d3b;
  font-size: 14px;
  font-weight: bold;
}

/* タイトル */
.single-title {
  margin: 0 0 20px;
  font-size: 42px;
  line-height: 1.4;
  color: #123126;
}

/* 日付 */
.single-date {
  margin-bottom: 32px;
  color: #5a6d63;
  font-size: 15px;
}

/* アイキャッチ */
.single-thumbnail {
  margin-bottom: 36px;
}

.single-thumbnail img {
  width: 100%;
  border-radius: 16px;
  display: block;
}

/* 本文 */
.single-content {
  color: #2b3934;
  line-height: 2;
  font-size: 17px;
}

/* 見出し */
.single-content h2 {
  margin-top: 48px;
  margin-bottom: 20px;
  padding-left: 16px;
  border-left: 6px solid #2ea66f;
  color: #145734;
  font-size: 28px;
}

.single-content h3 {
  margin-top: 36px;
  margin-bottom: 16px;
  color: #1d6b43;
  font-size: 22px;
}

/* 段落 */
.single-content p {
  margin-bottom: 24px;
}

/* 画像 */
.single-content img {
  max-width: 100%;
  border-radius: 12px;
}

/* リンク */
.single-content a {
  color: #15915a;
}

/* ===============================
   前の記事 / 次の記事
================================ */

.single-pagination {
  max-width: 1000px;
  margin: 40px auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
}

.single-pagination .prev-post {
  text-align: left;
}

.single-pagination .next-post {
  text-align: right;
  margin-left: auto;
}

.single-pagination a {
  display: inline-block;
  padding: 14px 24px;
  border-radius: 12px;
  background: linear-gradient(135deg, #36b58b, #42c86b);
  color: #fff;
  text-decoration: none;
  font-weight: bold;
  font-size: 15px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.12);
  transition: all 0.2s ease;
}

.single-pagination a:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 18px rgba(0,0,0,0.16);
  opacity: 0.95;
}

/* ===============================
   記事詳細広告レイアウト
================================ */

.single-layout {
  display: grid;
  grid-template-columns: 180px minmax(0, 1000px) 180px;
  gap: 24px;
  justify-content: center;
  align-items: start;
}

.single-main {
  min-width: 0;
}

.single-ad {
  background: #fff;
  border-radius: 16px;
  padding: 20px;
  height: fit-content;
}

.single-ad .ad-box {
  min-height: 600px;

  border: 2px dashed #ccc;
  border-radius: 12px;

  display: flex;
  align-items: center;
  justify-content: center;

  color: #999;
  font-weight: bold;
}

/* スマホ */
@media (max-width: 768px) {

  .single-card {
    padding: 28px 20px;
  }

  .single-title {
    font-size: 30px;
  }

  .single-content {
    font-size: 15px;
  }

  .single-pagination {
    max-width: 100%;
    margin: 28px auto;
  }

  .single-pagination a {
    padding: 12px 16px;
    font-size: 14px;
  }

  .single-layout {
    display: block;
  }

  .single-ad {
    display: none;
  }

}