.accordion {
    background-color: rgba(0, 123, 255, 0.25);
    color: #444;
    cursor: pointer;
    padding: 5px;
    width: 100%;
    border: none;
    text-align: left;
    outline: none;
    font-size: 15px;
    transition: 0.4s;
}

.accordion:after {
  content: '\002B';
  color: #777;
  font-weight: bold;
  float: right;
  margin-left: 5px;
}
.active,
.accordion:hover {
    background-color: rgba(0, 123, 255, 0.25);
}

.reading:after {
  content: "\2212";
}
.panel {
    padding: 0 18px;
    background-color: white;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.2s ease-out;
}