npub1h4dehx9me76zwu70f209t5elm6gq7jrc50tnq362t682cq5xa4pq64vng6 (npub1h4d…vng6) You need to make sure the SVG image has the size you want in --logo, then add the size like this (find .ui__header__logo and replace):
.layout-single-column .ui__header__logo,
.layout-single-column .column-link.column-link--logo {
background-image: var(--logo);
background-position: center;
background-repeat: no-repeat;
background-size: 200px 39.86px;
height: 39.86px;
padding: 0;
width: 200px;
}