.de-menu {
    font-size: 10px !important;
}

#canvas {
    position: absolute;
    z-index: 10;
    width: 100%;
    background: url(https://www.rtmuhp.com/wp-content/uploads/2020/08/113411346.jpg);
 background-repeat: no-repeat;
  background-attachment: fixed;
  background-position: center;
}