/* Keep the complete upper header and logo area white */
.pkp_structure_head,
.pkp_head_wrapper,
.pkp_site_name_wrapper,
.pkp_navigation_user_wrapper,
.pkp_navigation_user {
    background-color: #ffffff !important;
}

/* Green main-menu row */
.pkp_navigation_primary_row {
    position: relative;
    isolation: isolate;
    background-color: #4d9504 !important;
}

/* Extend only the menu background to both browser edges */
.pkp_navigation_primary_row::before {
    content: "";
    position: absolute;
    top: 0;
    bottom: 0;
    left: 50%;
    width: 100vw;
    transform: translateX(-50%);
    background-color: #4d9504;
    z-index: -1;
}

/* Keep the existing menu section green */
.pkp_navigation_primary_wrapper {
    background-color: #4d9504 !important;
}