Changed: 1595 line in style.css – margin-top to 0; to remove space before header.
body .site {
padding: 0;
padding: 0 2.857142857rem;
margin-top: 48px;
margin-top: 0;
margin-bottom: 48px;
margin-bottom: 3.428571429rem;
box-shadow: 0 2px 6px rgba(100, 100, 100, 0.3);
}
