.section .item-list {
    display: none;
    padding-left: 20px;
  }
  
  .section .item-list.active {
    display: block;
  }
  
  .section-title {
    cursor: pointer;
    background-color: #f1f1f1;
    padding: 10px;
    border: none;
    text-align: left;
    outline: none;
    font-size: 15px;
  }
  
  .section-title:hover {
    background-color: #ccc;
  }