.sidenav {
    height: 100%;
    width: 370px;
    position: fixed;
    z-index: 1;
    top: 0;
    left: 0;
    background-color: #ffffff;
    overflow-x: hidden;
    padding-top: 20px;
    margin-top:60px;
    justify-content: center;
    align-content: center;
}

.sidenav a {
    padding: 6px 6px 6px 32px;
    text-decoration: none;
    font-size: 25px;
    color: #818181;
    display: block;
}

.sidenav a:hover {
    color: #f1f1f1;
}

.mainDiv{
    margin-left: 500px;
    margin-top: 3.5rem;
    width: 900px;
}


@media screen and (max-height: 450px) {
    .sidenav {
        padding-top: 15px;
    }

    .sidenav a {
        font-size: 18px;
    }
}