Site Title and Tag Line – Centre Alignment needed

Hi Support Using "Responsive" and love it. I have added CSS to remove the serach and increase logo size. To finish off the site I need to centre the site title and tag Line. I have tried much of the CSS coding suggestions within this forum and from general searches of wordpress but can not resolve. My site is http://www.gleninnesshowground.com Any help would be very much appreciated. Thanks Karen