.NavBar {
    font-family: sans-serif;
}

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

.NavBar .dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: white;
    border: 1px solid #ccc;
    padding: 0.5em 0;
    white-space: nowrap;
    z-index: 100;
}

.NavBar .dropdown-menu a {
    display: block;
    padding: 0.25em 1em;
    text-decoration: none;
}

.NavBar .dropdown-menu a:hover {
    background: #f0f0f0;
}

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