hello , I have included a small text in the module " toolbar- r " , but in the mobile I would like the aligning this text at the center , I formatted with center alignment , but the message remains in the right .

how do I fix ?

thanks

Check the css with Firebug which style is loading in mobile view.
After that you can add your own css syntax to your css/custom.css
www.joomlaplates.com/template-customizing

see attachement please