body {
  margin: 0;
  padding: 10px;
  background-color: black;
}

.chapter {
  display: none;
}
.visiblechapter {
  display: block;
  text-align: center;
  position: fixed;
  top: 5%;
  left: 60%;
  right: 2%;
  bottom: 5%;
  margin: auto;
  background-color: rgba(255, 255, 255, 0.9);
  padding: 22px;
  font-family: Courier;
  color: white;
  -webkit-text-stroke-width: 0.2px;
  -webkit-text-stroke-color: white;
  text-shadow: 0px 0px 11px navy;
  font-size:14px;
  overflow: scroll;
}

canvas {
  display: block;
}

.title{
  font-family: Georgia, serif;
  font-weight: bold;
  color: white;
  font-size: 25px;
  -webkit-text-stroke-width: 0.8px;
  -webkit-text-stroke-color: grey;
  text-shadow: 0px 0px 9px black;
  display: block;
  position: fixed;
  top: 20px;
  left: 30px;
}



@media screen and (max-width: 800px) {
  .left, .main, .right {
    width: 100%; /* The width is 100%, when the viewport is 800px or smaller */
  }