:root {
  --neon-cyan: #0ff;
  --neon-magenta: #f0f;
  --neon-blue: #008cff;
  --neon-red: #ff3c3c;
  --bg-dark: #050505;
  --shadow-glow: 0 0 10px rgba(0, 255, 255, 0.7), 0 0 20px rgba(0, 255, 255, 0.5);
  --magenta-glow: 0 0 10px rgba(255, 0, 255, 0.7), 0 0 20px rgba(255, 0, 255, 0.5);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: 'Orbitron', sans-serif;
  background-color: var(--bg-dark);
  color: #fff;
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

#game-container {
  position: relative;
  width: 100%;
  height: 100%;
  max-width: 800px;
  max-height: 500px;
  border: 2px solid var(--neon-cyan);
  box-shadow: var(--shadow-glow);
  background: #000;
  overflow: hidden;
}

canvas {
  display: block;
}

.overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  background: rgba(0, 0, 0, 0.85);
  z-index: 10;
  text-align: center;
  transition: opacity 0.3s ease;
}

.hidden {
  display: none !important;
  opacity: 0;
  pointer-events: none;
}

.neon-text {
  font-size: 3rem;
  font-weight: 900;
  color: var(--neon-cyan);
  text-shadow: var(--shadow-glow);
  letter-spacing: 5px;
  margin-bottom: 0.5rem;
}

.neon-text-red {
  font-size: 3.5rem;
  font-weight: 900;
  color: var(--neon-red);
  text-shadow: 0 0 10px var(--neon-red), 0 0 20px rgba(255, 60, 60, 0.5);
  margin-bottom: 1rem;
}

.subtitle {
  font-size: 1.2rem;
  color: var(--neon-magenta);
  text-shadow: var(--magenta-glow);
  margin-bottom: 2rem;
}

.instructions {
  margin-bottom: 2rem;
  line-height: 1.8;
  color: #ccc;
  font-size: 0.9rem;
}

.cyber-btn {
  background: transparent;
  color: var(--neon-cyan);
  border: 2px solid var(--neon-cyan);
  padding: 12px 30px;
  font-family: 'Orbitron', sans-serif;
  font-size: 1.2rem;
  font-weight: bold;
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 2px;
  box-shadow: inset 0 0 5px var(--neon-cyan), 0 0 10px rgba(0, 255, 255, 0.3);
  transition: all 0.2s;
}

.cyber-btn:hover {
  background: var(--neon-cyan);
  color: #000;
  box-shadow: 0 0 20px var(--neon-cyan);
}

.cyber-btn:active {
  transform: scale(0.95);
}

.score-container {
  position: absolute;
  top: 20px;
  left: 20px;
  z-index: 5;
  background: rgba(0, 0, 0, 0.5);
  padding: 10px 15px;
  border-left: 3px solid var(--neon-magenta);
}

.score-container .label {
  color: var(--neon-magenta);
  margin-right: 10px;
  font-size: 0.8rem;
}

#current-score {
  font-size: 1.5rem;
  font-weight: bold;
}

.final-stats {
  margin-bottom: 2rem;
  font-size: 1.2rem;
}

.final-stats p {
  margin: 10px 0;
}

#final-score {
  color: var(--neon-cyan);
  font-weight: bold;
}

#high-score {
  color: var(--neon-magenta);
  font-weight: bold;
}

@media (max-width: 600px) {
  .neon-text { font-size: 2rem; }
  .neon-text-red { font-size: 2.5rem; }
  #game-container { border: none; box-shadow: none; }
}