.collapsible {
    background-color: rgb(235, 235, 235);
    color: #444444;
    cursor: pointer;
    padding: 18px;
    width: 100%;
    border: none;
    text-align: left;
    outline: none;
    font-size: 15px;
  }
  
  .active, .collapsible:hover {
    background-color: #e4e4e4;
  }
  
  .collapsible:after {
    content: '\002B';
    font-weight: bold;
    float: right;
    margin-left: 5px;
  }
  
  .collapsible.active:after {
    content: "\2212";
  }
  
  .collapsible-content {
    padding: 0 18px;
    max-height: 0;
    overflow: hidden;
    transition: max-height ease-in-out, padding ease-in-out;
    background-color: white;
    border: 2px solid rgb(235, 235, 235);
  }