canvas{
  padding-right: 0;
  margin-left: auto;
  margin-right: auto;
  display: block;
  /* the canvas *must not* have any border or padding, or mouse coords will be wrong */
  border: 0px none;
  background-color: var(--darkblue);
}


#output {
  width: 100%;
  height: 200px;
  margin: 0 auto;
  margin-top: 10px;
  border-left: 0px;
  border-right: 0px;
  padding-left: 0px;
  padding-right: 0px;
  display: block;
  background-color: black;
  color: white;
  font-family: 'Lucida Console', Monaco, monospace;
  outline: none;
}