/* ==========================================================================
   シングルページ（投稿詳細）
   ========================================================================== */
.single-section {
  padding: 4rem 0;
  background-color: var(--OffWhite);
  min-height: 80vh;
}

.single-post {
  background-color: var(--OffWhite);
}

/* コンテンツラッパー */
.single-header,
.single-thumbnail,
.single-content,
.single-contact,
.related-posts,
.single-back {
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 4rem;
  padding-right: 4rem;
}

.single-header {
  padding-top: 4rem;
  margin-bottom: 3rem;
  text-align: center;
}

.single-categories {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
  justify-content: center;
}

.single-category {
  background-color: var(--green);
  color: white;
  padding: 0.4rem 1rem;
  border-radius: 1rem;
  font-weight: bold;
  text-decoration: none;
  transition: opacity 0.3s;
}

.single-category:hover {
  opacity: 0.8;
}

.onepoint-badge {
  background-color: var(--yellow);
  color: white;
}

.single-title {
  margin-bottom: 1.5rem;
  line-height: 1.4;
  font-size: 3.5rem;
  color: var(--DarkGray);
}

.single-specs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-bottom: 1rem;
  justify-content: center;
  font-size: 0.9rem;
}

.single-year,
.single-mileage {
  display: inline-block;
  background-color: #f5f5f5;
  color: #666;
  padding: 0.4rem 0.8rem;
  border-radius: 0.4rem;
  font-weight: 500;
}

.single-meta {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  align-items: center;
}

.single-date {
  color: #999;
}

.single-thumbnail {
  max-width: 600px;
  width: 100%;
  margin-bottom: 3rem;
  border-radius: 1rem;
  overflow: hidden;
  aspect-ratio: 16 / 9;
}

.single-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.single-content {
  line-height: 2;
  margin-bottom: 4rem;
}

.single-content h2 {
  margin: 3rem 0 1.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 3px solid var(--green);
  color: var(--green);
}

.single-content h3 {
  margin: 2.5rem 0 1rem;
  color: var(--DarkGray);
}

.single-content h4 {
  margin: 2rem 0 1rem;
  color: var(--DarkGray);
}

.single-content img {
  max-width: 100%;
  height: auto;
  border-radius: 0.5rem;
  margin: 2rem auto;
  display: block;
}

.single-content p {
  margin-bottom: 1.5rem;
}

.single-content ul,
.single-content ol {
  margin: 1.5rem 0;
  padding-left: 2rem;
}

.single-content li {
  margin-bottom: 0.8rem;
  line-height: 1.8;
}

.single-content blockquote {
  margin: 2rem 0;
  padding: 1.5rem 2rem;
  background-color: var(--OffWhite);
  border-left: 4px solid var(--green);
  border-radius: 0.5rem;
}

.single-content a {
  color: var(--green);
  text-decoration: underline;
  transition: opacity 0.3s;
}

.single-content a:hover {
  opacity: 0.7;
}

/* 販売車種専用スペック表示 */
.lineup-specs-detail {
  background-color: var(--OffWhite);
  padding: 2rem;
  border-radius: 1rem;
  margin-bottom: 3rem;
}

.specs-title {
  margin-bottom: 1.5rem;
  text-align: center;
  color: var(--green);
}

.specs-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.spec-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem;
  background-color: white;
  border-radius: 0.5rem;
  border-left: 4px solid var(--green);
}

.spec-item .spec-label {
  font-weight: bold;
  color: #000;
}

.spec-item .spec-value {
  font-weight: bold;
  color: var(--green);
}

/* ワンポイント要約 */
.onepoint-summary {
  background-color: var(--yellow);
  color: white;
  padding: 2rem;
  border-radius: 1rem;
  margin-bottom: 3rem;
}

.onepoint-summary h2 {
  margin-bottom: 1rem;
  color: white;
}

.onepoint-summary p {
  margin: 0;
  line-height: 1.8;
}

/* お問い合わせボタン */
.single-contact {
  text-align: center;
  margin-bottom: 3rem;
}

/* 関連記事 */
.related-posts {
  margin-bottom: 3rem;
  padding-top: 3rem;
  padding-bottom: 0;
  border-top: 2px solid var(--Greige);
}

.related-title {
  text-align: center;
  margin-bottom: 2rem;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.related-card {
  background-color: var(--OffWhite);
  border-radius: 1rem;
  overflow: hidden;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s, box-shadow 0.3s;
}

.related-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.related-card a {
  text-decoration: none;
  color: inherit;
  display: block;
}

.related-thumbnail {
  width: 100%;
  height: 180px;
  overflow: hidden;
}

.related-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s;
}

.related-card:hover .related-thumbnail img {
  transform: scale(1.05);
}

.related-post-title {
  padding: 1rem 1rem 0.5rem;
  margin: 0;
  color: #000;
  font-size: 1.3rem;
  line-height: 1.4;
}

.related-date {
  display: block;
  padding: 0 1rem 1rem;
  color: #999;
}

/* 戻るボタン */
.single-back {
  text-align: center;
  padding-top: 2rem;
  padding-bottom: 4rem;
}

.back-button {
  display: inline-block;
  background-color: #000;
  color: white;
  padding: 1rem 3rem;
  border-radius: 2rem;
  font-size: 1.25rem;
  font-weight: bold;
  text-decoration: none;
  transition: all 0.3s;
  border: 2px solid #000;
}

.back-button:hover {
  background-color: white;
  color: #000;
}

/* ==========================================================================
   レスポンシブ対応 - タブレット (1024px以下)
   ========================================================================== */
@media (max-width: 1024px) {
  .single-header,
  .single-thumbnail,
  .single-content,
  .single-contact,
  .related-posts,
  .single-back {
    padding-left: 3rem;
    padding-right: 3rem;
  }

  .single-header {
    padding-top: 3rem;
  }

  .single-title {
    font-size: 2.5rem;
  }

  .related-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
}

/* ==========================================================================
   レスポンシブ対応 - スマートフォン (768px以下)
   ========================================================================== */
@media (max-width: 768px) {
  .single-header,
  .single-thumbnail,
  .single-content,
  .single-contact,
  .related-posts,
  .single-back {
    padding-left: 2rem;
    padding-right: 2rem;
  }

  .single-header {
    padding-top: 3rem;
  }

  .single-title {
    font-size: 2rem;
  }

  .single-specs {
    gap: 0.6rem;
    font-size: 0.85rem;
  }

  .single-year,
  .single-mileage {
    padding: 0.3rem 0.6rem;
  }

  .single-content h2 {
    font-size: 1.8rem;
  }

  .lineup-specs-detail,
  .onepoint-summary {
    padding: 1.5rem;
  }

  .back-button {
    padding: 0.9rem 2.5rem;
  }
}

/* ==========================================================================
   レスポンシブ対応 - 小型スマートフォン (480px以下)
   ========================================================================== */
@media (max-width: 480px) {
  .single-header,
  .single-thumbnail,
  .single-content,
  .single-contact,
  .related-posts,
  .single-back {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .single-header {
    padding-top: 2rem;
  }

  .single-title {
    font-size: 2rem;
  }

  .single-specs {
    gap: 0.5rem;
    font-size: 0.8rem;
  }

  .single-year,
  .single-mileage {
    padding: 0.25rem 0.5rem;
  }

  .lineup-specs-detail,
  .onepoint-summary {
    padding: 1.5rem;
  }
}