#sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: 250px;
    height: 100%;
    background: #333;
    color: #fff;
    padding: 20px;
    box-sizing: border-box;
}

#sidebar h2 {
    margin-top: 0;
}

#sidebar ul {
    list-style: none;
    padding: 0;
}

#sidebar ul li {
    margin-bottom: 10px;
}

#sidebar ul li a {
    color: #fff;
    text-decoration: none;
}

#main-content {
    margin-left: 250px;
    height: 100vh;
}

canvas {
    display: block;
    width: 100% !important;
    height: 100% !important;
}