To create more space for your primary menu, and less for your logo, you can add the following CSS to your Custom CSS box in Theme Options > Advanced Settings (feel free to adjust the percentages as best fit your needs):
@media (min-width: 992px) {
.col-md-8.kad-header-right { width: 75%; }
.col-md-4.clearfix.kad-header-left { width: 25%; } }