/*From https://www.w3schools.com/howto/howto_css_fixed_sidebar.asp*/

.sidenav {
    height: 100%;
    width: 160px;
    position: fixed;
    z-index: 1;
    top: 40;
    left: 0;
    background-color: #111;
    overflow-x: hidden;
    padding-top: 20px;
}



.sidenav a {
    padding:6px 8px 6px 16px;
    text-decoration: none;
    font-size: 25px;
    color: #818181;
    display: block;
}



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



.main {
    margin-left: 160px;
    padding: 10px 10px;
}



@media screen and (max-height: 450px) {
    .sidenav {padding-top: 15px};
    .sadenav a {font-size: 18px};
}