ul.header-nav {
    display: block;
    justify-content: center;
    padding-left: 0;
}

ul.header-nav li {
    display: inline-flex;
    padding: 10px 15px;
    font-size: 18px;
}
.header-menu.d-none {
     display: block !important;
}

.form-group.loan-balloon {
    display: none;
}