body {
  margin: 0;
  padding: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  background-color: #171717; /* Dark retro background */
}
div.static {
  position:static;
  border: 3px solid #73AD21
}

#game-container {
  image-rendering: pixelated; /* Keeps pixel art crisp */
}