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/*クリアCSS*/
.entry-content h3 {
  border: none;
  background: none;
}

/*見出しデザイン*/
/* 大見出し (h1) - 吹き出し風デザイン */
.entry-content h1 {
  position: relative;
  font-size: 2.5em;
  font-weight: bold;
  color: #333; /* 黒文字 */
  background: #007BFF; /* 水色 */
  padding: 20px;
  margin: 20px 0;
  display: inline-block;
  border: 2px solid #333; /* 黒枠 */
  border-radius: 8px;
}

.entry-content h1::before {
  content: '';
  position: absolute;
  top: 10px;
  left: -10px;
  width: 100%;
  height: 100%;
  background: #E3F2FD; /* 薄い水色 */
  z-index: -1;
  border-radius: 10px;
  transform: rotate(-2deg); /* ズレた矩形 */
}

/* 中見出し (h2) - 水色枠の黒文字 */
.entry-content h2 {
  padding: 1rem 2rem;
  border-left: 4px solid #0056b3;
}

/* 小見出し (h3) - 深い水色の下線 */
.entry-content h3 {
  font-size: 1.5em;
  font-weight: bold;
  color: #333; /* 黒文字 */
  margin: 15px 0;
  padding-bottom: 5px;
  border-bottom: 3px solid #0056b3; /* 深い水色の下線 */
}

/*目次のタイトル*/      
.table-of-contents:before {
  content: "目次";
  font-size: 110%;   /* 文字のサイズ */ 
  font-weight:bold;   /* 文字の太さ */    
  color:#000000;  /* 文字の色 */
}