.accordion {
  border-bottom: 1px solid #f8f8f8;
}
.accordion .card .card-header .opened .fa,
.accordion .card .card-header .closed .fa,
.accordion .card .card-header .opened .fas,
.accordion .card .card-header .closed .fas {
  color: #000000;
}
.accordion .card .card-header.active {
  background: #000000;
  color: #ffffff;
}