#topDiv {
    z-index: 999;
    background-color: #253880 !important; 
    position: relative;
    /*position: -webkit-sticky;*/
    top: 0;
    width: 100%;
    align-self: flex-start;
}

/*#NavbarPosition{
    position:relative;
    z-index:9999;
}*/


header {
    position: relative;
    top: 0;
    left: 0;
    padding: 0 100px;
    background: #262626;
    width: 100%;
    box-sizing: border-box;
    z-index: 9999; /* for to keep navbar on top*/    
}

    header .logo {
        color: #ffffff;
        height: 50px;
        line-height: 50px;
        font-size: 24px;
        float: right;
        font-weight: bold;
    }

    header nav {
        float: left;
    }

        header nav ul {
            margin: 0;
            padding: 0;
            display: flex;
        }

            header nav ul li {
                list-style-type: none;
                position: relative;
            }

.sub-menu {
}

header nav ul li.sub-menu:before {
    content: 'expand_more';
    font-family: Material Icons;
    position: absolute;
    color: #fff;
    right: 2px;
    line-height: 50px;
}

header nav ul li.active.sub-menu:before {
    content: 'expand_less';
}

header nav ul li ul {
    position: absolute;
    left: 0;
    background: #333;
    display: none;
}

header nav ul li.active ul {
    display: block;
}
/* header nav ul li:hover ul{
    display: block;
} */

header nav ul li ul li {
    display: block;
    width: 200px;
}

header nav ul li a {
    text-decoration: none;
    height: 50px;
    line-height: 50px;
    padding: 0 20px;
    color: #ffffff;
    display: block;
}

    header nav ul li a:hover,
    header nav ul li a.active {
        color: #ffffff;
        background: #2196f3;
    }

.menu-toggle {
    color: #fff;
    float: left;
    line-height: 50px;
    font-size: 34px;
    cursor: pointer;
    display: none;
}



@media (max-width: 991px) {
    header {
        padding: 0 20px;
    }

    .menu-toggle {
        display: block;
    }

    header nav {
        /* display: none; */
        position: absolute;
        width: 80%;
        /* height: 100%; */
        height: calc(100vh - 50px);
        background: #262626;
        top: 50px;
        /* left: 0; */
        left: -100%;
        transition: 0.5s;
    }

        header nav.active {
            left: 0;
        }

        header nav ul {
            display: block;
        }

            header nav ul li a {
                border-bottom: 1px solid rgb(0, 0, 0, 0.2);
            }

            header nav ul li.active ul {
                position: relative;
                background: #111111;
            }

            header nav ul li ul li {
                width: 100%;
            }
}


@media (max-width: 500px) {
    .logo a {
        font-size: 2vh !important;
    }
}

.logo a {
    color: #fff !important;
    font-size: 3vh !important;
}

    .logo a:hover {
        text-decoration: none;
    }