.collapsible {
    /* background-color: #ddd; */
    color: black;
    cursor: pointer;
    padding: 10px;
    width: 100%;
    border: none;
    text-align: left;
    outline: none;
    font-size: 14px;
}

.active,
.collapsible:hover {
    background-color: #ddd;
}

.content {
    padding: 0 18px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.2s ease-out;
    background-color: #f1f1f1;
}