html {
  height: 100%;
}

body {
  font-family: 'Montserrat', sans-serif;
  background-color: #339a43;
  height: 100%;
  margin: 0;
}

canvas#myCanvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 3;
}