enlarge logo on sticky menu

Hi there!
how I can enlarge logo on sticky menu?
to scroll down, I add a logo image in custom theme. This logo must float, like original logo page:
http://prntscr.com/nr0e44
I would like the same style in sticky menu.
I have this custom css:

.navigation-stick .navigation-branding {
    margin: 0;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
}
.navigation-stick .main-nav {
    width: 100%;
}
.site-branding,
.site-logo {
	position: absolute;
	left: 50%;
	-webkit-transform: translateX(-50%);
	        transform: translateX(-50%);
	z-index: 200;
	top:5%;
}

Best regards