#proxy {
  position: absolute;
  top: 0;
  right: 0;
  display: none;
}

#notebook {
  position: absolute;
  width: 600px;
  top: 0;
  left: 0;
  bottom: 0;
}

#nbOut {
  position: absolute;
  left: 620px;
  top: 0;
  right: 0;
  bottom: 0;
  padding-right: 5px;
  overflow-y: scroll;
}