How do I center the logo on my page (vantage theme)?

Hey everyone,

I was wondering if anyone had some advice on how to center the logo on my page?
I tried these codes already, but none of them worked. The logo is either aligned left or right.

body.responsive #masthead.masthead-logo-in-menu .logo {
display: block;
float: none !important;
margin: 0 auto;
height: 70px;
}

#masthead.masthead-logo-in-menu .logo > img.logo-no-height-constrain {
max-height: 200px;
}

I would really appreciate your support!

Thanks,
Sarah