.nav-menu-container {
    margin-bottom: 20px;
}

/* Common styles */
.arrow {
    display: inline-block;
    margin-left: 4px;
    color: white; /* White arrow */
    line-height: 0;
}

.sub-menu {
    display: none;
    position: absolute;
    top: 100%;
    right: 0; /* Align to the right */
    background-color: #f9f9f9;
    border: 1px solid #ddd;
    border-radius: 4px;
    z-index: 1000;
    list-style: none;
    padding: 0;
    margin: 0;
    text-align: center; /* Center contents */
}

.navbar-nav > li:hover .sub-menu {
    display: block;
}

.sub-menu li {
    padding: 8px 10px;
    padding-left: 10px !important;
    border-bottom: 2px solid black;
}

.sub-menu li a {
    color: #333;
    text-decoration: none;
    font-size: 16px;
}

.sub-menu li a:hover {
    text-decoration: underline;
}

/* Mobile styles */
@media (max-width: 768px) {
    .sub-menu {
        position: static;
        display: none; /* Hide by default */
    }

    .arrow {
        display: inline; /* Ensure arrow is visible */
        margin: 10px -20px 10px 5px;
    }
    
    .nav-menu-container {
        margin-top: 10px;
    }
}