/* Reset and Global Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

/* Game Container */
.game-container {
  position: relative;
  width: 800px;
  height: 600px;
  margin: 20px auto;
  border: 2px solid #fff;
  box-shadow: 0 0 20px rgba(255, 255, 255, 0.2);
  background-color: #111;
}

/* Canvas */
#gameCanvas {
  display: block;
  background-color: #000;
}

/* Game State Overlays */
.overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  background-color: rgba(0, 0, 0, 0.8);
  z-index: 10;
}

.overlay.hidden {
  display: none;
}

.start-overlay h1 {
  color: #0f0;
  font-size: 2.5em;
  margin-bottom: 20px;
  text-align: center;
}

.start-overlay p {
  color: #fff;
  font-size: 1.2em;
  margin-bottom: 30px;
  text-align: center;
  max-width: 80%;
}

.game-over-overlay h2 {
  color: #f00;
  font-size: 2.5em;
  margin-bottom: 20px;
}

.game-over-overlay p {
  color: #fff;
  font-size: 1.2em;
  margin-bottom: 30px;
}

/* Score and Lives Display */
.display {
  position: absolute;
  top: 20px;
  left: 20px;
  font-size: 1.2em;
  color: #fff;
  z-index: 5;
}

.score-display {
  margin-bottom: 10px;
}

/* Control Instructions */
.instructions {
  position: absolute;
  bottom: 20px;
  left: 0;
  width: 100%;
  text-align: center;
  color: #aaa;
  font-size: 1em;
  z-index: 5;
}

/* Responsive Design */
@media (max-width: 850px) {
  .game-container {
    width: 95vw;
    height: 80vh;
  }
  
  .start-overlay h1,
  .game-over-overlay h2 {
    font-size: 2em;
  }
  
  .start-overlay p,
  .game-over-overlay p {
    font-size: 1em;
  }
}

@media (max-width: 600px) {
  .game-container {
    width: 98vw;
    height: 85vh;
  }
  
  .start-overlay h1,
  .game-over-overlay h2 {
    font-size: 1.5em;
  }
  
  .start-overlay p,
  .game-over-overlay p {
    font-size: 0.9em;
  }
  
  .instructions {
    font-size: 0.9em;
  }
}