.accordion {
    background-color: #eee;
    color: #444;
    cursor: pointer;
    padding: 2px 18px 2px 18px;
    width: 100%;
    text-align: left;
    margin-bottom: 12px;
    border: none;
    outline: none;
    transition: 0.4s;
}

.toggle {
    background-color: white;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease-out;
}

.accordion:hover {
    background-color: #ddd;
}

.sort button.accordion {
    display: none;
}

.sort .toggle {
    max-height: 500px;
}

.accordion:before {
    content: '\02795';
    /* Unicode character for "plus" sign (+) */
    font-size: 13px;
    color: #777;
    margin-right: 24px;
}

.active:before {
    content: "\02796";
    /* Unicode character for "minus" sign (-) */
}