.navbar {
    background-color: #346;
    overflow: hidden;
    display: flex;
    justify-content: center;
}
.navbar a {
    color: white;
    padding: 14px 20px;
    text-decoration: none;
    display: block;
}
.navbar a:hover {
    background-color: #575757;
}
.current {
    background-color: #008145;
}