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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: #ffffff;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.container {
  width: 100%;
  max-width: 28rem;
  margin: 0 auto;
}

.game-card {
  background: white;
  border-radius: 0.5rem;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  border: 1px solid #e5e7eb;
  overflow: hidden;
}

.game-header {
  text-align: center;
  padding: 1.5rem;
  border-bottom: 1px solid #e5e7eb;
}

.game-title {
  font-size: 1.5rem;
  font-weight: bold;
  letter-spacing: 0.05em;
  color: #111827;
  margin-bottom: 0.25rem;
}

.game-subtitle {
  font-size: 0.875rem;
  color: #6b7280;
}

.game-content {
  padding: 2rem;
  text-align: center;
}

.emoji-display {
  font-size: 5rem;
  margin-bottom: 1.5rem;
  line-height: 1;
}

.question {
  font-size: 1.125rem;
  font-weight: 500;
  color: #374151;
  margin-bottom: 1.5rem;
}

.button-container {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  margin-bottom: 1.5rem;
}

.game-button {
  padding: 0.75rem 2rem;
  font-size: 1.125rem;
  font-weight: 600;
  border: none;
  border-radius: 0.375rem;
  cursor: pointer;
  transition: background-color 0.2s;
}

.turtle-button {
  background-color: #818384;
  color: white;
}

.turtle-button:hover {
  background-color: #818384;
}

.not-turtle-button {
  background-color: #818384;
  color: white;
}

.not-turtle-button:hover {
  background-color: #818384;
}

.game-button:disabled {
  cursor: not-allowed;
  opacity: 0.6;
}

.game-button.selected {
  opacity: 1;
  transform: scale(0.95);
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.2);
}

.game-button.selected.correct {
  background-color: #3a3a3d;
  border: 2px solid #3a3a3d;
}

.game-button.selected.incorrect {
  background-color: #3a3a3d;
  border: 2px solid #3a3a3d;
}

.game-button.not-selected {
  opacity: 0.4;
}

.result-container {
  margin-bottom: 1.5rem;
}

.result-text {
  font-size: 1.5rem;
  font-weight: bold;
  margin-bottom: 1rem;
}

.result-text.correct {
  color: #059669;
}

.result-text.incorrect {
  color: #dc2626;
}

.next-game-text {
  color: #6b7280;
}

.streak-container {
  padding-top: 1rem;
  border-top: 1px solid #e5e7eb;
}

.streak-label {
  font-size: 0.875rem;
  color: #6b7280;
  margin-bottom: 0.25rem;
}

.streak-number {
  font-size: 1.875rem;
  font-weight: bold;
  color: #111827;
}

@media (max-width: 640px) {
  .emoji-display {
    font-size: 4rem;
  }

  .button-container {
    flex-direction: column;
    align-items: center;
  }

  .game-button {
    width: 100%;
    max-width: 200px;
  }
}