html, body {
  margin: 0;
  width: 100%;
  height: 100%;
}

canvas {
  width: 100%;
  height: 100%;
  display: block;
}

#page {
  height: 100vh;
}

#main-grid {
  display: grid;
  grid-template-columns: 1fr;
  grid-template-rows: 1fr;
}

#main-grid div {
  
}