html,
body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: radial-gradient(circle at top, #f4f7fb 0%, #dce6f5 45%, #c6d6ee 100%);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

#game {
  width: 100%;
  height: 100%;
}

canvas {
  display: block;
}