I am trying to reduce the default header height - changing the Header Padding setting in the Header Navigation menu (either above or below the default of 28) does nothing to change the height.

Thanks Tahir - which of the CSS files is this located in  - I dont understand the .(index) reference, and could not find this code searching through the obvious CSS files.

Not much there... just what's below:

#footer-outer[data-cols="1"] #copyright .col, #footer-outer[data-cols="1"] #copyright .col ul, #footer-outer #copyright[data-layout="centered"] .col, #footer-outer #copyright[data-layout="centered"] .col ul {
    margin-top: 20px;
}

.nectar-button.fixed-size {
    width: 140px;
}

.grecaptcha-badge { 
    opacity:0;
}

.single .heading-title[data-header-style="default_minimal"] .blog-title .meta-category {
    display: none;
}