.card {
    position: relative;
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-orient: vertical;
    -webkit-box-direction: normal;
    -ms-flex-direction: column;
    flex-direction: column;
    min-width: 0;
    word-wrap: break-word;
    background-color: #fff;
    background-clip: border-box;
    border: 1px solid rgba(0,0,0,.125);
    border-radius: .25rem;
}

.card-header {
    padding: .75rem 1.25rem;
    margin-bottom: 0;
    background-color: rgba(0,0,0,.03);
    border-bottom: 1px solid rgba(0,0,0,.125);
}

.card-body {
    -webkit-box-flex: 1;
    -ms-flex: 1 1 auto;
    flex: 1 1 auto;
    padding: 1.25rem;
}

.btn-link {
    font-weight: 400;
    color: #007bff;
    background-color: transparent;
}

#accordion .card .card-header button:not(.collapsed)::after {
    content: '\2013';
    color: #9e9e9e;
}

#accordion .card .card-header button.collapsed::after {
    content: '+';
    color: #5c8696;
}

#accordion .card .card-header button::after {
    position: absolute;
    float: right;
    top: 12px;
    right: 20px;
    font-size: 1.7em;
    opacity: 0.5;
}

#accordion .card .card-header button {
    text-align: left;
    width: 95%;
    border: none;
}

#accordion .card .card-header button:focus {
outline: none;
}