Hey there,
please try this custom CSS:
#header, .bigheader { height: 100px !important; }
#logo img { max-height: 100px; }
#header .smallheader { height: 75px !important; }
the first two rows tell the initial header and the logo to be 100px in height, and the last row makes sure that the scroll header remains 75px; you can of course change the values to whichever ones fit you most ;) just make sure that the second line’s value is the same as the first line’s, otherwise the logo might stretch beyond the heading.
Sincerely,
Andrii / Satori Studio