@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@400;700;900&display=swap');

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

body {
  background: linear-gradient(135deg, #0a0a0a 0%, #1a1a1a 50%, #0f0f0f 100%);
  color: #00ff88;
  font-family: 'Orbitron', monospace;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 1rem;
  overflow-x: hidden;
}

.container {
  max-width: 600px;
  width: 100%;
  text-align: center;
}

h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 900;
  color: #00ff88;
  text-shadow: 0 0 20px #00ff88, 0 0 40px #00ff88;
  margin-bottom: 2rem;
  letter-spacing: 2px;
  animation: glow 2s ease-in-out infinite alternate;
}

@keyframes glow {
  from { text-shadow: 0 0 20px #00ff88, 0 0 40px #00ff88; }
  to { text-shadow: 0 0 30px #00ff88, 0 0 60px #00ff88, 0 0 80px #00ff88; }
}

.game-header {
  background: linear-gradient(145deg, #1a1a1a, #0d0d0d);
  border: 2px solid #00ff88;
  border-radius: 20px;
  padding: 1.5rem;
  margin-bottom: 2rem;
  box-shadow: 0 8px 32px rgba(0, 255, 136, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.instructions {
  color: #cccccc;
  font-size: 1.1rem;
  line-height: 1.6;
  margin-bottom: 1rem;
}

.instructions h2 {
  color: #00ff88;
  margin-bottom: 1rem;
  font-size: 1.4rem;
}

.score-container {
  display: flex;
  align-items: center;
  gap: 2rem;
  justify-content: center;
  margin: 1.5rem 0;
  font-weight: 700;
  font-size: 1.2rem;
}

.score-display {
  color: #00ff88;
  text-shadow: 0 0 10px #00ff88;
}

.difficulty-container {
  margin: 1rem 0;
}

.difficulty-container label {
  color: #cccccc;
  font-weight: 700;
  margin-right: 1rem;
}

.difficulty-container select {
  background: linear-gradient(145deg, #2a2a2a, #1a1a1a);
  border: 2px solid #00ff88;
  color: #00ff88;
  padding: 0.5rem 1rem;
  border-radius: 10px;
  font-family: 'Orbitron', monospace;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.3s ease;
}

.difficulty-container select:hover {
  background: linear-gradient(145deg, #00ff88, #00cc66);
  color: #000;
}

.game-container {
  position: relative;
  display: inline-block;
  margin: 2rem 0;
}

canvas {
  border: 3px solid #00ff88;
  background: radial-gradient(circle at center, #0a0a0a, #000000);
  border-radius: 15px;
  box-shadow: 0 0 30px rgba(0, 255, 136, 0.5), inset 0 0 50px rgba(0, 255, 136, 0.1);
  display: block;
  width: 100%;
  max-width: 500px;
  height: auto;
  aspect-ratio: 1;
}

.game-over-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.9);
  display: flex;
  justify-content: center;
  align-items: center;
  border-radius: 15px;
  backdrop-filter: blur(5px);
}

.game-over-overlay.hidden {
  display: none;
}

.game-over-content {
  background: linear-gradient(145deg, #1a1a1a, #0d0d0d);
  padding: 2rem;
  border-radius: 20px;
  border: 2px solid #00ff88;
  text-align: center;
  box-shadow: 0 8px 32px rgba(0, 255, 136, 0.3);
}

.game-over-content h2 {
  font-size: 2.5rem;
  color: #ff4444;
  margin-bottom: 1rem;
  text-shadow: 0 0 10px #ff4444;
}

.game-over-content p {
  font-size: 1.2rem;
  margin-bottom: 1rem;
  color: #cccccc;
}

.btn {
  background: linear-gradient(145deg, #00ff88, #00cc66);
  color: #000;
  border: none;
  padding: 1rem 2rem;
  border-radius: 15px;
  font-family: 'Orbitron', monospace;
  font-weight: 700;
  font-size: 1.1rem;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(0, 255, 136, 0.4);
  text-decoration: none;
  display: inline-block;
  margin: 0.5rem;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0, 255, 136, 0.6);
  background: linear-gradient(145deg, #00cc66, #00aa55);
}

.btn:active {
  transform: translateY(0);
}

.controls {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  max-width: 300px;
  margin: 2rem auto;
  padding: 0 1rem;
}

.control-btn {
  background: linear-gradient(145deg, #2a2a2a, #1a1a1a);
  border: 2px solid #00ff88;
  color: #00ff88;
  padding: 1rem;
  border-radius: 15px;
  font-family: 'Orbitron', monospace;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.3s ease;
  user-select: none;
  touch-action: manipulation;
}

.control-btn:hover, .control-btn:active {
  background: linear-gradient(145deg, #00ff88, #00cc66);
  color: #000;
  transform: scale(0.95);
}

.control-btn.empty {
  opacity: 0;
  pointer-events: none;
}

.mobile-controls {
  display: none;
}

.pause-info {
  color: #cccccc;
  font-size: 0.9rem;
  margin: 1rem 0;
}

@media (max-width: 768px) {
  .mobile-controls {
    display: block;
  }
  
  canvas {
    max-width: 400px;
  }
  
  .game-header {
    padding: 1rem;
  }
  
  .instructions {
    font-size: 1rem;
  }
}

@media (max-width: 480px) {
  canvas {
    max-width: 320px;
  }
  
  .score-container {
    flex-direction: column;
    gap: 1rem;
    font-size: 1rem;
  }
  
  .controls {
    max-width: 250px;
    gap: 0.5rem;
  }
  
  .control-btn {
    padding: 0.8rem;
    font-size: 0.9rem;
  }
}