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

:root {
  --bg-deep: #0d0d1a;
  --bg-mid: #1a1a2e;
  --cyan: #00f0ff;
  --pink: #ff00aa;
  --green: #00ff66;
  --red: #ff4444;
  --amber: #ffaa00;
  --text: #ffffff;
  --text-dim: #8888aa;
  --tile-border: #222233;
}

body {
  background: var(--bg-deep);
  color: var(--text);
  font-family: 'VT323', monospace;
  min-height: 100vh;
  overflow-x: hidden;
}

/* CRT Scanline overlay - thicker for VGA feel */
#root::after {
  content: '';
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  pointer-events: none;
  z-index: 9999;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 3px,
    rgba(0,0,0,0.12) 3px,
    rgba(0,0,0,0.12) 6px
  );
}

/* VGA color banding effect on images */
.pixel-art {
  image-rendering: pixelated;
  image-rendering: -moz-crisp-edges;
  image-rendering: crisp-edges;
}

/* Pixel grid background pattern */
.pixel-bg {
  background-image:
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 16px 16px;
}

/* Arcade font */
.font-arcade {
  font-family: 'Press Start 2P', cursive;
}

.font-lcd {
  font-family: 'VT323', monospace;
}

/* Glow effects */
.glow-cyan {
  text-shadow: 0 0 10px var(--cyan), 0 0 20px var(--cyan), 0 0 40px rgba(0,240,255,0.3);
}

.glow-pink {
  text-shadow: 0 0 10px var(--pink), 0 0 20px var(--pink);
}

.glow-green {
  text-shadow: 0 0 10px var(--green), 0 0 20px var(--green);
}

.box-glow-cyan {
  box-shadow: 0 0 10px var(--cyan), 0 0 20px rgba(0,240,255,0.3), inset 0 0 10px rgba(0,240,255,0.1);
}

.box-glow-green {
  box-shadow: 0 0 10px var(--green), 0 0 20px rgba(0,255,102,0.3);
}

.box-glow-pink {
  box-shadow: 0 0 10px var(--pink), 0 0 20px rgba(255,0,170,0.3);
}

.box-glow-red {
  box-shadow: 0 0 10px var(--red), 0 0 20px rgba(255,68,68,0.3);
}

/* Pulsing animation for selected tile */
@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 8px var(--cyan), 0 0 16px rgba(0,240,255,0.4); }
  50% { box-shadow: 0 0 16px var(--cyan), 0 0 32px rgba(0,240,255,0.6), 0 0 48px rgba(0,240,255,0.2); }
}

.tile-selected {
  animation: pulse-glow 1s ease-in-out infinite;
  z-index: 10;
}

/* Tile correct flash */
@keyframes correct-flash {
  0% { box-shadow: 0 0 20px var(--green), 0 0 40px var(--green); filter: brightness(1.5); }
  100% { box-shadow: none; filter: brightness(1); }
}

.tile-correct-flash {
  animation: correct-flash 0.6s ease-out forwards;
}

/* Locked tile subtle brightness */
.tile-locked {
  filter: brightness(1.1);
}

/* Title shimmer */
@keyframes shimmer {
  0%, 100% { text-shadow: 0 0 10px var(--cyan), 0 0 20px var(--cyan), 0 0 40px rgba(0,240,255,0.4); }
  50% { text-shadow: 0 0 20px var(--pink), 0 0 40px var(--pink), 0 0 60px rgba(255,0,170,0.4); }
}

.title-shimmer {
  animation: shimmer 3s ease-in-out infinite;
}

/* Confetti */
@keyframes confetti-fall {
  0% { transform: translateY(-10px) rotate(0deg); opacity: 1; }
  100% { transform: translateY(100vh) rotate(720deg); opacity: 0; }
}

.confetti-piece {
  position: fixed;
  width: 8px;
  height: 8px;
  top: -10px;
  animation: confetti-fall linear forwards;
  z-index: 100;
  image-rendering: pixelated;
}

/* Loading bar */
@keyframes load-pulse {
  0%, 100% { opacity: 0.7; }
  50% { opacity: 1; }
}

.load-pulse {
  animation: load-pulse 1.5s ease-in-out infinite;
}

/* Unlock animation */
@keyframes unlock-shake {
  0%, 100% { transform: rotate(0deg); }
  10%, 30%, 50%, 70%, 90% { transform: rotate(-5deg); }
  20%, 40%, 60%, 80% { transform: rotate(5deg); }
}

.unlock-shake {
  animation: unlock-shake 0.8s ease-in-out;
}

@keyframes unlock-crack {
  0% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.3); opacity: 1; }
  100% { transform: scale(2); opacity: 0; }
}

.unlock-crack {
  animation: unlock-crack 1s ease-out forwards;
}

/* Stars */
@keyframes twinkle {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 1; }
}

/* Button hover */
.arcade-btn {
  transition: all 0.15s ease;
  cursor: pointer;
  border: 3px solid;
  image-rendering: pixelated;
}

.arcade-btn:hover {
  transform: translateY(-2px);
  filter: brightness(1.2);
}

.arcade-btn:active {
  transform: translateY(1px);
  filter: brightness(0.9);
}

/* Tile swap animation helper */
.tile-transitioning {
  transition: transform 0.3s ease-in-out;
  z-index: 20;
}

/* Scrollbar styling */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-deep);
}
::-webkit-scrollbar-thumb {
  background: #333355;
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: #444477;
}

/* Image rendering for pixel art */
.pixel-art {
  image-rendering: pixelated;
  image-rendering: -moz-crisp-edges;
  image-rendering: crisp-edges;
}

/* Circuit pattern for puzzle bg */
.circuit-bg {
  background-image:
    radial-gradient(circle at 20% 50%, rgba(0,240,255,0.03) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(255,0,170,0.03) 0%, transparent 50%),
    linear-gradient(rgba(255,255,255,0.015) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.015) 1px, transparent 1px);
  background-size: 100% 100%, 100% 100%, 24px 24px, 24px 24px;
}

/* Modal overlay */
.modal-overlay {
  background: rgba(0,0,0,0.85);
  backdrop-filter: blur(4px);
}

/* Responsive max width */
.app-container {
  max-width: 800px;
  margin: 0 auto;
}

/* Blurred thumbnail */
.thumb-blur {
  filter: blur(8px) brightness(0.7);
}

.thumb-clear {
  filter: none;
}

/* Progress bar */
.progress-bar-fill {
  transition: width 0.5s ease;
  background: linear-gradient(90deg, var(--cyan), var(--green));
  box-shadow: 0 0 8px var(--cyan);
}

/* Star rating */
.star-filled {
  color: var(--amber);
  text-shadow: 0 0 8px var(--amber);
}

.star-empty {
  color: #333355;
}

/* Prevent text selection on game elements */
.no-select {
  user-select: none;
  -webkit-user-select: none;
}