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

body {
  font-family: "Roboto", sans-serif;
  background-color: #f5f5f5;
  color: #333;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.game-container {
  max-width: 500px;
  width: 100%;
  background-color: white;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  padding: 24px;
}

.game-title {
  text-align: center;
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 24px;
  color: #333;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

.game-mode-selector {
  margin-bottom: 20px;
  text-align: center;
}

.mode-toggle {
  display: inline-flex;
  background-color: #f0f0f0;
  border-radius: 8px;
  padding: 4px;
}

.mode-option {
  padding: 8px 16px;
  border: none;
  background: transparent;
  color: #666;
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 6px;
}

.mode-option.active {
  background-color: white;
  color: #333;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.difficulty-selector {
  margin-top: 16px;
  text-align: center;
  display: none;
}

.difficulty-btn {
  margin: 0 4px;
  padding: 6px 12px;
  border: 1px solid #ddd;
  background: white;
  color: #666;
  border-radius: 16px;
  cursor: pointer;
  font-size: 12px;
}

.difficulty-btn.active {
  background-color: #4285f4;
  color: white;
  border-color: #4285f4;
}

.stats-panel {
  background-color: #f8f9fa;
  border-radius: 10px;
  padding: 16px;
  margin-bottom: 20px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  text-align: center;
}

.stat-item {
  padding: 8px;
}

.stat-number {
  font-size: 20px;
  font-weight: 700;
  color: #4285f4;
}

.stat-label {
  font-size: 12px;
  color: #666;
  margin-top: 4px;
}

.score-board {
  display: flex;
  justify-content: space-between;
  margin-bottom: 20px;
  gap: 12px;
}

.score-item {
  background-color: #f8f9fa;
  border-radius: 10px;
  padding: 12px;
  text-align: center;
  flex: 1;
}

.score-label {
  font-size: 12px;
  color: #666;
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
}

.score-value {
  font-size: 20px;
  font-weight: 700;
}

.player-x .score-value {
  color: #4285f4;
}

.player-o .score-value {
  color: #ea4335;
}

.game-status {
  text-align: center;
  margin-bottom: 20px;
  font-size: 16px;
  font-weight: 500;
  min-height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.current-player {
  padding: 8px 16px;
  border-radius: 20px;
  background-color: #f0f0f0;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.game-board {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-bottom: 24px;
}

.cell {
  aspect-ratio: 1;
  background-color: #f8f9fa;
  border: 2px solid #e0e0e0;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.cell:hover {
  background-color: #f0f0f0;
}

.cell.taken {
  cursor: not-allowed;
}

.cell .material-icons {
  font-size: 36px;
}

.cell.x .material-icons {
  color: #4285f4;
}

.cell.o .material-icons {
  color: #ea4335;
}

.winning-line {
  background-color: #e8f0fe;
  border-color: #4285f4;
}

.control-buttons {
  display: flex;
  gap: 12px;
  justify-content: center;
}

.btn-game {
  padding: 10px 20px;
  border: none;
  border-radius: 6px;
  font-weight: 500;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: 6px;
}

.btn-reset {
  background-color: #f8f9fa;
  color: #333;
}

.btn-reset:hover {
  background-color: #e8e8e8;
}

.btn-new-game {
  background-color: #4285f4;
  color: white;
}

.btn-new-game:hover {
  background-color: #3367d6;
}

@media (max-width: 768px) {
  .game-container {
    padding: 16px;
  }

  .game-title {
    font-size: 24px;
  }

  .cell .material-icons {
    font-size: 32px;
  }

  .score-board {
    flex-direction: column;
    gap: 8px;
  }
}