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

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.game-wrapper {
  max-width: 900px;
  width: 100%;
}

/* Header */
.game-header {
  background: rgba(255, 255, 255, 0.95);
  padding: 1rem 1.5rem;
  border-radius: 15px 15px 0 0;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.game-header h1 {
  font-size: 1.8rem;
  color: #667eea;
  margin: 0;
}

.back-btn {
  padding: 0.6rem 1.2rem;
  border: none;
  border-radius: 8px;
  background: #48bb78;
  color: white;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s ease;
}

.back-btn:hover {
  background: #38a169;
  transform: translateY(-2px);
}

/* Game Container */
.game-container {
  background: rgba(255, 255, 255, 0.95);
  border-radius: 0 0 15px 15px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
  position: relative;
  overflow: hidden;
}

.game-ui {
  display: flex;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  background: rgba(102, 126, 234, 0.1);
}

.score-display,
.high-score-display {
  text-align: center;
}

.score-label {
  font-size: 0.85rem;
  color: #666;
  font-weight: 600;
  text-transform: uppercase;
  margin-bottom: 0.25rem;
}

.score-value {
  font-size: 1.5rem;
  font-weight: bold;
  color: #667eea;
}

/* Canvas */
#gameCanvas {
  display: block;
  width: 100%;
  background: linear-gradient(to bottom, #87ceeb 0%, #e0f6ff 100%);
  cursor: pointer;
}

/* Overlays */
.game-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.85);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
  animation: fadeIn 0.3s ease;
}

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

.overlay-content {
  background: white;
  padding: 2rem;
  border-radius: 15px;
  text-align: center;
  max-width: 500px;
  width: 90%;
  animation: slideUp 0.4s ease;
}

.overlay-content h2 {
  color: #667eea;
  margin-bottom: 1rem;
  font-size: 2rem;
}

.overlay-content p {
  color: #666;
  margin-bottom: 1rem;
  line-height: 1.6;
}

.instructions {
  background: rgba(102, 126, 234, 0.1);
  padding: 1rem;
  border-radius: 10px;
  margin: 1rem 0;
}

.instructions p {
  margin: 0.5rem 0;
}

.instructions strong {
  color: #667eea;
}

/* Buttons */
.game-btn {
  padding: 0.8rem 2rem;
  border: none;
  border-radius: 10px;
  background: #667eea;
  color: white;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  margin: 0.5rem;
}

.game-btn:hover {
  background: #5568d3;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.game-btn.secondary {
  background: #718096;
}

.game-btn.secondary:hover {
  background: #4a5568;
}

/* Final Score */
.final-score {
  background: rgba(102, 126, 234, 0.1);
  padding: 1.5rem;
  border-radius: 10px;
  margin: 1rem 0;
}

.final-score p {
  font-size: 1.2rem;
  color: #333;
  margin: 0.5rem 0;
}

.final-score span {
  color: #667eea;
  font-weight: bold;
  font-size: 1.4rem;
}

.new-record {
  color: #48bb78 !important;
  font-weight: bold;
  animation: pulse 1s infinite;
}

.new-record.hidden {
  display: none;
}

/* Leaderboard */
.leaderboard-list {
  max-height: 400px;
  overflow-y: auto;
  margin: 1rem 0;
}

.leaderboard-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.8rem 1rem;
  background: rgba(102, 126, 234, 0.1);
  border-radius: 8px;
  margin: 0.5rem 0;
  transition: all 0.3s ease;
}

.leaderboard-item:hover {
  background: rgba(102, 126, 234, 0.2);
  transform: translateX(5px);
}

.leaderboard-rank {
  font-size: 1.2rem;
  font-weight: bold;
  color: #667eea;
  min-width: 40px;
}

.leaderboard-rank.gold {
  color: #ffd700;
}

.leaderboard-rank.silver {
  color: #c0c0c0;
}

.leaderboard-rank.bronze {
  color: #cd7f32;
}

.leaderboard-score {
  font-size: 1.1rem;
  font-weight: 600;
  color: #333;
}

.leaderboard-date {
  font-size: 0.85rem;
  color: #999;
}

.leaderboard-empty {
  color: #999;
  padding: 2rem;
  text-align: center;
}

/* Tips */
.tips {
  margin-top: 1rem;
  text-align: center;
  color: white;
  font-size: 0.9rem;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

/* Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {
  0%,
  100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
  .game-header h1 {
    font-size: 1.4rem;
  }

  .score-value {
    font-size: 1.2rem;
  }

  .overlay-content {
    padding: 1.5rem;
  }

  .overlay-content h2 {
    font-size: 1.5rem;
  }

  .game-btn {
    font-size: 1rem;
    padding: 0.7rem 1.5rem;
  }
}

@media (max-width: 480px) {
  body {
    padding: 0.5rem;
  }

  .game-header {
    padding: 0.8rem 1rem;
  }

  .game-ui {
    padding: 0.8rem 1rem;
  }

  .overlay-content {
    padding: 1rem;
  }
}