Navbar float Css

im trying to center the navbar menu but i cant do it … nay idea ??

From within system you can set topbar menu items either to left or right. Can you share how you are trying to do it?

i`m trying to do this through frappe-web.css or bootstrap.css actually i dont need to make them left or right just center

Float is used just to align left or right. For center align you will need to google it how to do it. My suggestion try something like this:
position: relative;
left: 50%;