:root {
  --bg-main: #0c0f17;
  --bg-card: rgba(22, 27, 46, 0.75);
  --bg-card-border: rgba(99, 102, 241, 0.25);
  --accent-cyan: #06b6d4;
  --accent-magenta: #ec4899;
  --accent-lime: #10b981;
  --accent-amber: #f59e0b;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --font-retro: 'Press Start 2P', monospace;
  --font-body: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --glow-cyan: 0 0 20px rgba(6, 182, 212, 0.35);
  --glow-magenta: 0 0 20px rgba(236, 72, 153, 0.4);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

body {
  background-color: var(--bg-main);
  background-image: 
    radial-gradient(circle at 15% 20%, rgba(99, 102, 241, 0.12) 0%, transparent 40%),
    radial-gradient(circle at 85% 80%, rgba(236, 72, 153, 0.1) 0%, transparent 40%),
    linear-gradient(180deg, #090c13 0%, #0f1422 100%);
  color: var(--text-main);
  font-family: var(--font-body);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow-x: hidden;
  padding: 1rem;
}

.app-wrapper {
  width: 100%;
  max-width: 1060px;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin: auto;
}

/* Header */
.game-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem 0.5rem;
}

.title-container {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.arcade-badge {
  font-family: var(--font-retro);
  font-size: 0.6rem;
  letter-spacing: 2px;
  color: var(--accent-cyan);
  text-shadow: 0 0 8px rgba(6, 182, 212, 0.6);
}

.game-title {
  font-family: var(--font-retro);
  font-size: 1.6rem;
  letter-spacing: 1px;
  color: #fff;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}

.game-title .highlight {
  color: var(--accent-magenta);
  text-shadow: 0 0 15px rgba(236, 72, 153, 0.6);
}

.header-controls {
  display: flex;
  gap: 0.75rem;
}

.icon-button {
  background: rgba(30, 41, 59, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-main);
  border-radius: var(--radius-sm);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  backdrop-filter: blur(10px);
}

.icon-button:hover {
  background: rgba(51, 65, 85, 0.8);
  border-color: var(--accent-cyan);
  box-shadow: 0 0 12px rgba(6, 182, 212, 0.3);
  transform: translateY(-2px);
}

.icon-button:active {
  transform: translateY(0);
}

.svg-icon {
  width: 22px;
  height: 22px;
}

.hidden {
  display: none !important;
}

/* Game Container */
.game-container {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-lg);
  box-shadow: 
    0 20px 40px -15px rgba(0, 0, 0, 0.7),
    0 0 25px rgba(99, 102, 241, 0.15);
  backdrop-filter: blur(16px);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  overflow: hidden;
}

/* HUD */
.game-hud {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.25rem 0.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  padding-bottom: 0.75rem;
}

.hud-left, .hud-right {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.hud-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(15, 23, 42, 0.7);
  padding: 0.4rem 0.8rem;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.08);
  font-family: var(--font-retro);
  font-size: 0.65rem;
}

.speed-badge .badge-label {
  color: var(--text-muted);
}

.speed-badge #speed-indicator {
  color: var(--accent-lime);
  font-weight: 700;
}

.hud-stat {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  font-family: var(--font-retro);
}

.stat-label {
  font-size: 0.65rem;
  color: var(--text-muted);
  letter-spacing: 1px;
}

.stat-value {
  font-size: 1.15rem;
  letter-spacing: 2px;
  color: #fff;
}

.current-score-box .stat-value {
  color: var(--accent-cyan);
  text-shadow: 0 0 10px rgba(6, 182, 212, 0.5);
}

.high-score-box .stat-value {
  color: var(--accent-amber);
}

/* Canvas Area */
.canvas-wrapper {
  position: relative;
  width: 100%;
  aspect-ratio: 1000 / 340;
  background: #000;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: inset 0 0 20px rgba(0, 0, 0, 0.8), 0 0 0 1px rgba(255, 255, 255, 0.05);
}

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

/* Overlay Screens */
.overlay-screen {
  position: absolute;
  inset: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  background: rgba(10, 14, 26, 0.78);
  backdrop-filter: blur(8px);
  z-index: 10;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.overlay-screen.hidden {
  opacity: 0;
  pointer-events: none;
  visibility: hidden;
}

.overlay-card {
  background: rgba(19, 24, 43, 0.95);
  border: 1px solid rgba(99, 102, 241, 0.4);
  border-radius: var(--radius-lg);
  padding: 2.2rem 2.8rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.2rem;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.8), 0 0 30px rgba(99, 102, 241, 0.25);
  max-width: 440px;
  width: 90%;
  animation: modalPop 0.35s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

@keyframes modalPop {
  0% { transform: scale(0.9); opacity: 0; }
  100% { transform: scale(1); opacity: 1; }
}

.dino-avatar-preview {
  font-size: 3.5rem;
  line-height: 1;
  filter: drop-shadow(0 0 16px rgba(6, 182, 212, 0.6));
  animation: bounceSlow 2s infinite ease-in-out;
}

@keyframes bounceSlow {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.overlay-card h2 {
  font-family: var(--font-retro);
  font-size: 1.2rem;
  color: #fff;
  letter-spacing: 1px;
}

.overlay-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
}

kbd {
  display: inline-block;
  padding: 0.2rem 0.5rem;
  font-size: 0.75rem;
  font-family: var(--font-retro);
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 4px;
  color: var(--accent-cyan);
  box-shadow: 0 2px 0 rgba(0, 0, 0, 0.5);
}

.primary-btn {
  font-family: var(--font-retro);
  font-size: 0.85rem;
  letter-spacing: 1px;
  color: #fff;
  background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
  border: 1px solid rgba(255, 255, 255, 0.25);
  padding: 1rem 2rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 10px 20px -5px rgba(79, 70, 229, 0.5);
  margin-top: 0.5rem;
}

.primary-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 15px 25px -5px rgba(79, 70, 229, 0.7), 0 0 15px rgba(124, 58, 237, 0.5);
  background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
}

.primary-btn:active {
  transform: translateY(1px);
}

.pulse-anim {
  animation: pulseButton 2s infinite ease-in-out;
}

@keyframes pulseButton {
  0%, 100% { box-shadow: 0 0 0 0 rgba(124, 58, 237, 0.6); }
  50% { box-shadow: 0 0 0 10px rgba(124, 58, 237, 0); }
}

/* Game Over Card */
.game-over-banner {
  font-family: var(--font-retro);
  font-size: 1.4rem;
  color: var(--accent-magenta);
  text-shadow: 0 0 16px rgba(236, 72, 153, 0.8);
  letter-spacing: 2px;
}

.score-summary {
  display: flex;
  justify-content: center;
  gap: 2rem;
  width: 100%;
  background: rgba(10, 14, 26, 0.6);
  padding: 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.summary-item {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.summary-label {
  font-size: 0.65rem;
  font-family: var(--font-retro);
  color: var(--text-muted);
}

.summary-val {
  font-family: var(--font-retro);
  font-size: 1.25rem;
  color: #fff;
}

.high-score-ribbon {
  background: linear-gradient(90deg, #f59e0b, #ef4444);
  color: #fff;
  font-family: var(--font-retro);
  font-size: 0.7rem;
  padding: 0.4rem 1rem;
  border-radius: 999px;
  animation: bounceSlow 1.5s infinite;
  box-shadow: 0 0 15px rgba(245, 158, 11, 0.5);
}

/* Mobile Controls */
.mobile-controls {
  display: none;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 0.5rem;
}

.touch-btn {
  flex: 1;
  background: rgba(30, 41, 59, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-md);
  color: #fff;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  font-family: var(--font-retro);
  font-size: 0.8rem;
  cursor: pointer;
  touch-action: manipulation;
  transition: background 0.15s, transform 0.1s;
}

.touch-btn:active {
  background: rgba(99, 102, 241, 0.4);
  transform: scale(0.97);
}

.touch-btn-jump {
  background: linear-gradient(135deg, rgba(79, 70, 229, 0.6), rgba(124, 58, 237, 0.6));
  border-color: rgba(124, 58, 237, 0.4);
}

/* Footer & Instructions */
.game-footer {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.8rem;
}

.instructions-card {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.2rem;
  padding: 0.5rem 1rem;
}

.instruction-pill {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.instruction-pill kbd {
  background: rgba(15, 23, 42, 0.8);
  border-color: rgba(255, 255, 255, 0.15);
}

.credits {
  font-size: 0.75rem;
  color: rgba(148, 163, 184, 0.6);
  letter-spacing: 0.5px;
}

/* Responsive Breakpoints */
@media (max-width: 768px) {
  body {
    padding: 0.5rem;
  }
  
  .game-container {
    padding: 0.8rem;
    border-radius: var(--radius-md);
  }

  .game-title {
    font-size: 1.2rem;
  }

  .mobile-controls {
    display: flex;
  }

  .hud-stat .stat-value {
    font-size: 0.95rem;
  }

  .hud-badge {
    padding: 0.3rem 0.5rem;
    font-size: 0.55rem;
  }

  .overlay-card {
    padding: 1.5rem;
  }
}

@media (max-width: 480px) {
  .hud-stat {
    gap: 0.3rem;
  }

  .hud-left, .hud-right {
    gap: 0.8rem;
  }

  .stat-label {
    display: none;
  }
}