/* The Modal (background) */
#wraptrain-custom-user-message-modal {
    position: fixed;
    z-index: 9999;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: none;
    /* Initially hidden via JS if no reason exists */
}

/* Modal Content Box */
.wraptrain-custom-user-message-modal-content {
    position: relative;
    background-color: #fefefe;
    margin: 15% auto;
    padding: 30px;
    border: 1px solid #888;
    width: 350px;
    text-align: center;
    border-radius: 10px;
    font-family: sans-serif;
}

/* The Close Button */
.close-btn {
    position: absolute;
    top: 10px;
    right: 15px;
    color: #aaa;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
}

.close-btn:hover {
    color: #000;
}
<style>
.accordion1 {
  background-color: #eee;
  color: #444;
  cursor: pointer;
  padding: 18px;
  width: 100%;
  border: none;
  text-align: left;
  outline: none;
  font-size: 15px;
  transition: 0.4s;
}

.active, .accordion1:hover {
  background-color: #ccc;
}

.accordion1:after {
  content: '\002B';
  color: #777;
  font-weight: bold;
  float: right;
  margin-left: 5px;
}

/*Added .accordion1 and important for navmenu change*/
.accordion1.active:after {

  content: "\2212"!important;

}

.panela {
  padding: 0 18px;
  background-color: white;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.2s ease-out;
}
</style>