client/securedrop_client/gui/auth/dialog.css

QWidget {
    font-family: 'Source Sans Pro';
}

#LoginDialog_form QLabel {
    color: #fff;
    font-family: 'Montserrat';
    font-weight: 500;
    font-size: 13px;
}

#LoginDialog_form QLineEdit {
    border-radius: 0px;
    height: 30px;
    margin: 0px 0px 0px 0px;
    padding-left: 5px;
}

#LoginDialog_app_version_label {
    color: #9fddff;
}