body {
  margin: 0;
  background-color: #1a1a1a;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  font-family: 'Arial', sans-serif;
}

#game-container {
  position: relative;
  width: 800px;
  height: 600px;
  border: 2px solid #00ff00;
  box-shadow: 0 0 20px #00ff00;
  background-color: #000;
  overflow: hidden;
}

#score {
  position: absolute;
  top: 20px;
  left: 20px;
  color: #00ff00;
  font-size: 24px;
  text-shadow: 0 0 5px #00ff00;
}

#game-over {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: #ff0000;
  font-size: 36px;
  text-align: center;
  text-shadow: 0 0 10px #ff0000;
  display: none;
  background-color: rgba(0, 0, 0, 0.7);
  padding: 20px;
  border-radius: 10px;
}

#controls {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
}

#controls button {
  padding: 10px 20px;
  background-color: #00ff00;
  color: #000;
  border: none;
  border-radius: 5px;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.3s;
}

#controls button:hover {
  background-color: #00cc00;
  transform: scale(1.05);
}

#instructions {
  position: absolute;
  top: 20px;
  right: 20px;
  color: #00ff00;
  font-size: 16px;
  text-shadow: 0 0 5px #00ff00;
}

canvas {
  display: block;
}