How to reduce Customizr header height?

I’m trying to reduce the height of the header. I’ve tried the custom CSS suggested in a couple of older queries (see below) but I can’t reduce the header below one inch, even when I change the pixel values. Possibly because I’m on Customizr 3.2? Any suggestions?
.tc-header, .navbar-inner {
position: relative;
top: -10px;
left: 0px;
top: -10%;
left: 0p%;
min-height: 100px;
max-height: 150px;
}