.accordion .card-header:after {
    font-family: 'FontAwesome';  
    content: "\f068";
    float: left;    margin-top: -45px;
        margin-left: -15px; 
}
.accordion .card-header.collapsed:after {
    /* symbol for "collapsed" panels */
    content: "\f067"; 
margin-top: -45px;
        margin-left: -15px; 

}