/* 記事内見出しのカスタムスタイル */

/* H2 見出し - ボーダーライン付き */
.post-content h2,
.content h2,
article h2,
main h2 {
  position: relative;
  padding-bottom: 0.5rem;
  margin-top: 3rem;
  margin-bottom: 1.5rem;
  border-bottom: 2px solid #e0e0e0;
  font-weight: 600;
  color: #000;
}

.post-content h2::before,
.content h2::before,
article h2::before,
main h2::before {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 60px;
  height: 2px;
  background: linear-gradient(to right, #134ed7, #3d6eff);
}

/* H3 見出し - 左ボーダー付き */
.post-content h3,
.content h3,
article h3,
main h3 {
  position: relative;
  padding-left: 1rem;
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  font-weight: 600;
  color: #333;
}

.post-content h3::before,
.content h3::before,
article h3::before,
main h3::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.2rem;
  width: 4px;
  height: calc(100% - 0.4rem);
  background: linear-gradient(to bottom, #134ed7, #3d6eff);
  border-radius: 2px;
}

/* H4 見出し - アイコン付き */
.post-content h4,
.content h4,
article h4,
main h4 {
  position: relative;
  padding-left: 1.5rem;
  margin-top: 2rem;
  margin-bottom: 1rem;
  font-weight: 600;
  color: #444;
}

.post-content h4::before,
.content h4::before,
article h4::before,
main h4::before {
  content: '▶';
  position: absolute;
  left: 0;
  top: 0;
  color: #134ed7;
  font-size: 0.8em;
  line-height: 1.2;
}

/* H5, H6 - シンプルなスタイル */
.post-content h5,
.content h5,
article h5,
main h5 {
  margin-top: 1.5rem;
  margin-bottom: 0.8rem;
  font-weight: 600;
  color: #555;
  font-style: italic;
}

.post-content h6,
.content h6,
article h6,
main h6 {
  margin-top: 1.5rem;
  margin-bottom: 0.8rem;
  font-weight: 500;
  color: #666;
  text-transform: uppercase;
  font-size: 0.9rem;
  letter-spacing: 0.5px;
}

/* ホバーエフェクト */
.post-content h2:hover::before,
.content h2:hover::before,
article h2:hover::before,
main h2:hover::before {
  width: 80px;
  transition: width 0.3s ease;
}

.post-content h3:hover::before,
.content h3:hover::before,
article h3:hover::before,
main h3:hover::before {
  width: 6px;
  transition: width 0.3s ease;
}

.post-content h4:hover::before,
.content h4:hover::before,
article h4:hover::before,
main h4:hover::before {
  transform: scale(1.2);
  transition: transform 0.3s ease;
}

/* レスポンシブ対応 */
@media (max-width: 768px) {
  .post-content h2,
  .content h2,
  article h2,
  main h2 {
    font-size: 1.5rem;
    margin-top: 2rem;
    color: #000; /* モバイルでも濃い色を保持 */
  }
  
  .post-content h3,
  .content h3,
  article h3,
  main h3 {
    font-size: 1.25rem;
    margin-top: 1.5rem;
    padding-left: 0.8rem;
    color: #333; /* モバイルでも濃い色を保持 */
  }
  
  .post-content h4,
  .content h4,
  article h4,
  main h4 {
    font-size: 1.1rem;
    margin-top: 1.5rem;
    padding-left: 1.2rem;
    color: #444; /* モバイルでも濃い色を保持 */
  }
  
  .post-content h5,
  .content h5,
  article h5,
  main h5 {
    color: #555; /* モバイルでも適切な色を保持 */
  }
  
  .post-content h6,
  .content h6,
  article h6,
  main h6 {
    color: #666; /* モバイルでも適切な色を保持 */
  }
}