ul {
        list-style-type: none;
        margin: 0;
        padding: 0;
        width: 130px;
        background-color: #f1f1f1;
        height: 100%; /* Full height */
        position: fixed; /* Make it stick, even on scroll */
        overflow: auto; /* Enable scrolling if the sidenav has too much content */
    }
    li a {
        display: block;
        color: black;
        padding: 8px 16px;
        text-decoration: none;
    }
    li a.active {
        background-color: #04AA6D;
        color: white;
    }
    li a:hover:not(.active) {
        background-color: #555555;
        color: white;
    }