.nav-dropdown {
    position: relative;
    display: inline-block;
}

.nav-dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: #fff;
    border: 1px solid #ddd;
    border-radius: 4px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
    padding: 4px 0;
    z-index: 1000;
    min-width: 160px;
}

.nav-dropdown:hover .nav-dropdown-menu {
    display: block;
}

.nav-dropdown-menu a {
    display: block;
    padding: 7px 14px;
    color: #0057a8;
    text-decoration: none;
    white-space: nowrap;
    font-size: 0.95em;
}

.nav-dropdown-menu a:hover {
    background: #f0f4f8;
    text-decoration: underline;
}