* { margin: 0; padding: 0; box-sizing: border-box; }
html, body {
  height: 100%;
  width: 100%;
  background: #0f0f1e;
  overflow: hidden;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", sans-serif;
}
#game-container {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  width: 100vw;
}
canvas {
  max-width: 100vw;
  max-height: 100vh;
  display: block;
  image-rendering: auto;
}