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

body {
  background: #000010;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  font-family: 'Courier New', monospace;
}

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

#game-canvas {
  display: block;
  border: 2px solid #1a1a4a;
  box-shadow: 0 0 40px rgba(60, 60, 200, 0.25);
}