Center Sitetitle and subtitle

Hi! I'd like to know how I can center the sitetitle and subtitle on my website. I've tried everything that is mentioned in various blogs, but nothing is working. When I use .site-title text-align:center, nothing happens. When I use .site-identity text-align:center, only the subtitle moves to the center. This is what I use now: .site-title { margin-left: 275px; } .site-description { text-align: center; } This kind of works, but is not the 'right' way and also isn't compatible with the mobile site. Hope anyone can help me out! Thank you.