.sidenav {
    height: calc(100vh - 120px);
    width: 0;
    position: fixed;
    top: 120px;
    left: 0;
    background-color: #bab2b5;
    overflow-x: hidden;
    transition: 0.5s;
    padding-top: 20px;
    z-index: 1;
}

.sidenav a {
    padding: 8px 8px 8px 32px;
    text-decoration: none;
    font-size: 20px;
    color: #818181;
    display: block;
    transition: 0.3s;
}

.sidenav a:hover {
    color: #000000;
}

/* Submenu styles */
.has-submenu, .student-submenu {
    position: relative;
}

.submenu {
    display: none;
    padding-left: 20px;
    background-color: #bab2b5;
}

.submenu a {
    font-size: 16px;
    padding: 8px 8px 8px 20px;
}

.has-submenu:hover .submenu, .student-submenu:hover .submenu {
    display: block;
}

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