* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
}

canvas {
  width: 100vw;
  height: 70vh;
  image-rendering: pixelated;
}

pre {
  margin: 0;
  width: 100vw;
  height: 20vh;
  border: 1px solid #7777;
  overflow-y: auto;
  padding: 8px;
  white-space: pre-wrap;
}

#input {
  margin: 0;
  width: 100vw;
  height: 5vh;
  padding: 4px;
  font-family: monospace;
  border: 1px solid #7777;
}