<style>

button.accordion {
    background-color: #fff;
    border-bottom: 1px #CCFFFF solid;
    color: gray;
    cursor: pointer;
    padding: 18px;
    width: 100%;
    border: none;
    text-align: left;
    outline: none;
    font-size: 15px;
    transition: 0.4s;
}


button.accordion.active,
button.accordion:hover {

    background-color: #ddd;
}


button.accordion:after {

/* Unicode character for "plus" sign
(+) is '\02795' */ 

  /* content: '\02795'; */

    /* Unicode character for "Down arrow" sign
 is '\9660' */ 

    content: '\9660';
    font-size: 13px;
    color: #777;
    float: right;
    margin-left: 5px;
}


button.accordion.active:after {

/* Unicode character for "minus" sign
(-) is '\2796' */ 


    /*content: "\2796"; */

    /* Unicode character for "Down arrow" sign
 is '\9650' */ 

 content: "\9650";
}


div.panel {
    padding: 0 18px;
    background-color: white;
    max-height: 0;
    overflow: hidden;
    transition: 0.6s ease-in-out;
    opacity: 0;
}

div.panel.show {
    opacity: 1;
    max-height: 500px;
}

</style>