The minimum height in your code is set at 164px. So you would need to adjust that if you have a logo that doesn’t require that much space. Other than that, the menu links on the right have padding on the top and bottom which adds to the header height. This can be found around line 2024 in your css –
.genesis-nav-menu a {
border: none;
color: #fff;
display: block;
font-weight: 400;
padding: 13px;
position: relative;
}
You can change the padding like this – padding: 8px 13px;
….The “8px” represents the top and bottom, so adjust that number if you need to.