button.dd-trigger {
        border: none;
        background-color: transparent;
        padding: 0;
        margin: 0;
        cursor: pointer;
        
    }

        button.dd-trigger:after {
            content: '\f078';
            font-family: var(--font-awesome);
            display: inline;
            margin-left: .25em;
        }

        button.dd-trigger[aria-expanded='true']:after {
                content: '\f077';
            }