:root {
  --bg: #000000;
  --fg: #00ffff;
  --fg-dim: #006666;
  --accent: #ffff00;
  --danger: #ff0000;
  --panel: rgba(0, 20, 20, 0.9);
  --glow: #00ffff;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  min-height: 100vh;
  font-family: 'Courier New', 'Monospace', monospace;
  overflow: hidden;
  touch-action: none;
}

canvas {
  display: block;
  width: 100%;
  height: 100vh;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
}

#hud {
  position: fixed;
  top: 12px;
  left: 12px;
  right: 12px;
  display: flex;
  justify-content: space-between;
  padding: 0 16px;
  font-size: 14px;
  font-weight: bold;
  text-shadow: 0 0 4px var(--glow), 0 0 8px var(--glow);
  pointer-events: none;
  z-index: 10;
}

#hud div {
  background: var(--panel);
  padding: 4px 12px;
  border: 1px solid var(--fg-dim);
  border-radius: 4px;
}

#superzapper.ready {
  color: var(--accent);
  text-shadow: 0 0 6px #ffff00, 0 0 12px #ffff00;
  animation: pulse 1s infinite;
}

#superzapper.used {
  color: var(--fg-dim);
  text-shadow: none;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

#overlay {
  position: fixed;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.95);
  z-index: 100;
  gap: 24px;
  text-align: center;
}

#overlay.hidden {
  display: none;
}

#overlay-title {
  font-size: 48px;
  font-weight: bold;
  color: var(--fg);
  text-shadow: 0 0 10px var(--glow), 0 0 20px var(--glow), 0 0 40px var(--glow);
  letter-spacing: 8px;
  text-transform: uppercase;
}

#overlay-sub {
  font-size: 20px;
  color: var(--accent);
  text-shadow: 0 0 6px #ffff00;
  animation: blink 1.2s infinite;
}

@keyframes blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0.3; }
}

#overlay-controls {
  display: flex;
  gap: 32px;
  font-size: 14px;
  color: var(--fg-dim);
  flex-wrap: wrap;
  justify-content: center;
}

#overlay-controls span {
  padding: 8px 16px;
  border: 1px solid var(--fg-dim);
  border-radius: 4px;
  background: var(--panel);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

@media (max-width: 768px) {
  #overlay-title { font-size: 32px; letter-spacing: 4px; }
  #overlay-sub { font-size: 16px; }
  #overlay-controls { gap: 16px; font-size: 12px; }
  #hud { font-size: 12px; padding: 0 8px; }
  #hud div { padding: 3px 8px; }
}