.navbar{
    height: 400;
    width: 500;
    position:fixed;
    z-index: 1;
    top: 0;
    left: 0;
    background-color: #333;
    overflow-x:hidden;
}
.navbar a{
    font-family: montserrat;
    display:block;
    color: #f2f2f2;
    font-width: 700;
    text-align: center;
    padding: 16px;
    text-decoration: none;
}
.navbar a.active{
    background-color: purple;
    color:#fff;
}