.btn-deepblue {
    background-color: #003f8c; /* deep nautical blue */
    border-color: #003f8c;
    color: #fff;
}

.btn-deepblue:hover {
    background-color: #003f8c; /* keep the same colour */
    border-color: #003f8c;
    color: #fff !important;
}

.navbar-darktext .nav-link,
.navbar-darktext .navbar-brand {
    color: #222 !important; /* strong dark grey */
}

.navbar-darktext .nav-link:hover,
.navbar-darktext .navbar-brand:hover {
    color: #000 !important; /* full black on hover */
}