una/modules/boonex/invites/template/css/main.css

/*--- Invite block ---*/
div.bx-inv-invite-btn  {
	text-align: center;
}
div.bx-inv-invite-btn .bx-btn {
	float: none;
	display: inline-block;
}

/*--- Request Invite block ---*/
div.bx-inv-request-btn  {}