style.css

html, body {
  margin: 0;
  padding: 0;
  background: black;
  color: #00ffcc;
  font-family: monospace;
  height: 100%;
}

#root {
  display: flex;
  height: 100%;
}

#viewport {
  border: 2px solid #00ffcc;
  image-rendering: pixelated;
}

#console {
  flex: 1;
  display: flex;
  flex-direction: column;
  margin-left: 10px;
}

#log {
  flex: 1;
  overflow-y: auto;
  white-space: pre-wrap;
}

#input {
  background: black;
  color: #00ffcc;
  border: 1px solid #00ffcc;
  padding: 6px;
}