.nav-main {
    background: #0A3161;
    padding: 10px;
    margin: 10px;
    border: 2px solid #B31942;
    border-radius: 5px;
}

.nav-main ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.nav-main a {
    color: white;
    text-decoration: none;
    padding: 5px 10px;
    border-radius: 3px;
}

.nav-main a:hover {
    background: white;
    color: #0A3161;
}

.nav-popup {
    position: relative;
}

.popup-content {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: white;
    padding: 10px;
    border: 1px solid #B31942;
    border-radius: 4px;
    width: 200px;
    margin-top: 5px;
}

.nav-popup:hover .popup-content {
    display: block;
}

@media screen and (max-width: 900px) {
    .nav-main ul {
        flex-direction: column;
        gap: 10px;
    }
}