.main-menu {
    background: linear-gradient(to right, #ffffff 0%, #d6eeff 6%, #82b5df 12%, #2f6fa0 18%, #065868 30%, #282a35 100%) !important;
    background: linear-gradient(to right, #2f6fa0 10%, #065868 30%, #282a35 100%) !important;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
    padding: 0 20px;
    position: sticky;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    font-weight: 500;
}

.air.main-menu {
    background: linear-gradient(to left, 
        #b0e0ff 0%,     /* Light blue - start */
        #aed6f1 10%,    /* Light blue - step 1 */
        #a2d4ec 20%,    /* Light blue - step 2 */
        #87bdd8 30%,    /* Light blue - step 3 */
        #6daacc 40%,    /* Light blue - step 4 */
        #5499b7 50%,    /* Light blue - step 5 */
        #3e8abb 60%,    /* Light blue - step 6 */
        #2774a2 70%,    /* Light blue - step 7 */
        #1f618d 80%,    /* Light blue - step 8 */
        #4682b4 100%   /* Steel blue - end */
    ) !important;
}

.logo {
    max-width: 280px;
}

.page-logo {
    max-width: 200px;
}

.glow-effect {
    filter:
        drop-shadow(-2px 0 2px #ffffff)
        /* Left shadow */
        drop-shadow(2px 0 2px #ffffff)
        /* Right shadow */
        drop-shadow(0 -2px 2px #ffffff)
        /* Top shadow */
        drop-shadow(0 2px 2px #ffffff);
    /* Bottom shadow */
}

.sub-menu {
    background-color: #dee2e6;
    padding-top: 80px;
    height: 100%;
    width: 300px;
    position: fixed;
    left: 0;
    overflow-y: auto;
    z-index: 1;
}

.sub-menu ul.nav li.nav-item a.nav-link {
    background-color: #fff;
}

.sub-menu ul.nav li.nav-item {
    margin-bottom: 5px;
}

.sub-menu ul.nav li.nav-item a.nav-link:hover {
    background-color: #333;
    color: white;
}

.sub-menu ul.nav li.nav-item a.nav-link.active {
    background-color: #198754;
    color: white;
}

#cargo-booking-submenu,
#carrier-booking-submenu,
#load-planning-submenu,
#stuffing-submenu,
#shipment-submenu,
#shipment-advice-submenu,
#house-billing-submenu,
#management-submenu,
#invoice-submenu,
#report-submenu,
#vgm-submenu,
#data-dictionary-submenu {
    display: none;
}

#cargo-booking-submenu.active,
#carrier-booking-submenu.active,
#load-planning-submenu.active,
#stuffing-submenu.active,
#shipment-submenu.active,
#shipment-advice-submenu.active,
#house-billing-submenu.active,
#management-submenu.active,
#invoice-submenu.active,
#report-submenu.active,
#vgm-submenu.active,
#data-dictionary-submenu.active {
    display: block;
}


.hover-effect {
    color: #def !important;
}

.hover-effect:hover {
    background-color: #dddd;
    color: black !important;
}

.navbar a.active {
    background-color: #198754 !important;
    color: white !important;
}


@media (max-width: 1441px) {
    .sub-menu {
        width: 220px;
        font-size: smaller;
    }

    .logo {
        max-width: 180px;
    }

    #navbarNav {
        font-size: small;
    }

    #dropdownMenuLink {
        max-width: 120px;
        font-size: small;
    }
}

@media (max-width: 1025px) {
    .sub-menu {
        width: 150px;
        font-size: smaller;
    }

    .logo {
        max-width: 180px;
    }

    #navbarNav {
        font-size: small;
        max-width: 96% !important;
    }

    #dropdownMenuLink {
        max-width: 120px;
        font-size: small;
    }

    .navbar-collapse.collapse {
        background-color: #1c3a47;
        text-align: center;
    }
}


@media (max-width: 1000px) {
    .sub-menu {
        display: none !important;

    }

    #topNavbar {
        font-size: small;
        max-width: 98% !important;
    }

}