Styling Upgrade ProSite button in adminbar impossible

I’m trying to change styles to the button in adminbar but plugin adds inline styles with !important so I can not change styles.

Our adminbar is customized so need to change this.

Is there a way around this?

#wpadminbar li#wp-admin-bar-pro-site a {
padding-top: 3px !important;
height: 25px !important;
border-right: 1px solid #333 !important;
}

Thank you