* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background-color: #000;
}

body {
  display: flex;
  justify-content: center;
  align-items: center;
}

canvas {
  display: block;
  max-width: 100%;
  max-height: 100%;
  image-rendering: pixelated;
  /* Crisp pixel art scaling */
  image-rendering: -moz-crisp-edges;
  image-rendering: crisp-edges;
  outline: none;
  /* Remove focus outline */
}
canvas:focus {
  outline: none;
}