[Theme: Customizr] Customizr logo size and placement – yes again!

I’ve tried to get a header similar to https://mindovermattersound.com/, i.e. with a logotype above the navbar in the header.
First I found the suggestion

.navbar-wrapper .brand {width:100%; float:center;}
.navbar-wrapper .navbar {width:99%; float:center;}

in the thread https://www.ads-software.com/support/topic/increase-logo-size. The code is logical enough that I understand waht should be happening, but it’s not quite “there” – I can increase the logo size, but not get them on separate lines, and not centered.

Then I found the code
.brand.span3 {width: 100%;}
in the thread https://www.ads-software.com/support/topic/increase-logo-size-1,which just looks very cryptic to me, but BAM! it solved half the equation, when I added it to the other code.

Now the logo is big, the navbar is below it, but regardless of much I play around with .navbar’s float, center, and width parameters, the navbar is always left justified, about 50(?) pixels or so from the left border.

I’ve tried adding a
.navbar.span3 {width: 100%;}
code, but that makes no difference.

How do I center the navbar, on its on line, below the logo?