.dropdown-submenu {
    position: relative;
}

.dropdown-submenu .dropdown-menu {
    top: 0;
    left: 100%;
    margin-top: -1px;
    background-color: #FFFFFF !important;
}

.dropdown-menu {
    background-color: #FFFFFF !important;
}

.dropdown-submenu:hover > .dropdown-menu {
    display: block;
}

/* Add arrow to indicate submenu */
.dropdown-submenu > .dropdown-toggle:after {
    display: block;
    float: right;
    margin-top: 8px;
    margin-right: -5px;
}

/* Mobile styles */
@media (max-width: 991px) {
    .dropdown-submenu .dropdown-menu {
        left: 0;
        top: 100%;
        margin-left: 1rem;
        border: none;
        box-shadow: none;
    }

    .dropdown-submenu .dropdown-toggle::after {
        transform: rotate(90deg);
    }

    .dropdown-menu {
        border: none;
        background-color: transparent !important;
    }

    .dropdown-item {
        padding-left: 1.5rem;
    }

    .submenu .dropdown-item {
        padding-left: 2.5rem;
    }
}