.rental-logo,
.catalog-logo,
.rental-top header nav a,
.catalog-header nav a {
    font-size: 13px;
    font-weight: 800;
}

@media (max-width: 760px) {
    .rental-logo,
    .catalog-logo,
    .rental-top header nav a,
    .catalog-header nav a {
        font-size: 11px;
    }
}