* { box-sizing: border-box; margin: 0; padding: 0; }
html, body {
  width: 100%; height: 100%;
  background: #1a1a22;
  overflow: hidden;
  touch-action: none;
  -webkit-user-select: none;
  user-select: none;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
}
#game-wrap {
  width: 100%; height: 100%;
  display: flex; align-items: center; justify-content: center;
}
#game, #game canvas {
  display: block;
  max-width: 100vw;
  max-height: 100vh;
}