.single .entry-content h1 { 
  font-weight: 700; 
  font-size: 30px; 
  line-height: 1.5; 
  color: #1a202c; 
}

.single .entry-content h2 { 

  color: #333; 
  padding: 3px 8px; 
  text-align: left; 
  background-color: #f5f5f5; 
  border-left: 5px solid #007f77; 
  margin: 18px 0 15px 0px;  /* 좌측 여백 0px */
  font-size: 19px; 
  font-weight: 700; 
  transition: none; 
  position: relative; 
  border-radius: 5px; 
  box-shadow: 2px 2px 5px rgba(0, 0, 0, 0.1); 
}

.single .entry-content h3 { 
  color: #333; 
  padding: 2px 8px; 
  text-align: left; 
  background-color: #f5f5f5; 
  border-left: 5px solid #4ebfb4; 
  margin: 18px 0 15px 10px;  /* 좌측 여백 10px 추가 */
  font-size: 17px; 
  font-weight: 600; 
  transition: none; 
  position: relative; 
  border-radius: 5px; 
  box-shadow: 2px 2px 5px rgba(0, 0, 0, 0.1); 
}

.single .entry-content h4 { 
  color: #333; 
  padding: 1px 8px; 
  text-align: left; 
  background-color: #f5f5f5; 
  border-left: 3px solid #aad4c6; 
  margin: 17px 0 15px 20px;  /* 좌측 여백 20px 추가 */
  font-size: 16px; 
  font-weight: 600; 
  transition: none; 
  position: relative; 
  border-radius: 5px; 
  box-shadow: 2px 2px 5px rgba(0, 0, 0, 0.1); 
}

.single .entry-content h5 { 
  color: #333; 
  padding: 1px 10px; 
  text-align: left; 
  background-color: #f5f5f5; 
  border-left: 0px solid #537FEE; 
  margin: 20px 0 15px 30px;  /* 좌측 여백 30px 추가 */
  font-size: 16px; 
  font-weight: 600; 
  transition: none; 
  position: relative; 
  border-radius: 5px; 
  box-shadow: 2px 2px 5px rgba(0, 0, 0, 0.1); 
}