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

body {
  background-color: #000;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  font-family: 'Arial', sans-serif;
  overflow: hidden;
}

#game-container {
  border: 2px solid #30f030;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 0 20px #30f030aa;
}

canvas {
  background: #0a0a1a;
  display: block;
}