config.scss

.config {
    position: fixed;
    right: 0;
    z-index: 1000;

    .ms-Button--default {
        padding: 0 8px;
        margin: 0 0 12px 0;
        border: none;
        box-shadow: 0 3px 3px rgba(0, 0, 0, 0.08);
        border-radius: 18px 0 0 18px;
        font-size: 12px;
        text-align: left;

        .ms-Button-label {
            font-weight: normal;
        }
    }

    .ms-Button--default:hover {
        background-color: #0071bc;
        color: #fff;
    }
}

.ms-Fabric {
    .ms-Panel-commands {
        margin: 0;
    }
}