html, body {
  padding: 0;
  margin: 0;
  position: absolute;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
}

button {
  display: block;
  margin: 3em auto;
  background: lightgrey;
  padding: 1em 3em;
  font-size: 24px;
}

canvas {
  position: absolute;
}

body.ready canvas {
  position: relative;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  image-rendering: pixelated;
}

.instructions {
  margin: 0 auto;
  width: 420px;

  font-family: sans-serif;
  background: rgba(255,255,255,0.5);
}

body.ready .instructions {
  margin: unset;
  width: unset;

  position: relative;
  bottom: 300px;
  height: 300px;
  overflow:hidden;

  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: 4em repeat(2, 1fr);
}

.instructions * {
  grid-column-start: 2;
}

.instructions h2 {
  grid-row-start: 1;
  grid-column-start: 1;
}
.instructions table {
  grid-row-start: 2;
  grid-column-start: 1;
}