.sudoku-generator {
    max-width: 1180px !important;
    margin: 0 auto !important;
    padding: 15px !important;
    font-family: 'Malgun Gothic', '맑은 고딕', 'Arial', sans-serif !important;
    background-color: #f5f7fa !important;
    border: 1px solid #d2d6dc !important;
    border-radius: 6px !important;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1) !important;
}

.sudoku-generator * {
    box-sizing: border-box !important;
}

.sudoku-generator h2 {
    text-align: center !important;
    color: #1a202c !important;
    font-size: 1.6em !important;
    margin: 0 0 20px 0 !important;
    font-weight: 700 !important;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%) !important;
    color: white !important;
    padding: 12px !important;
    border-radius: 6px !important;
    box-shadow: 0 2px 6px rgba(102, 126, 234, 0.3) !important;
}

.main-container {
    display: flex !important;
    gap: 15px !important;
    margin-bottom: 15px !important;
}

.bottom-section {
    display: flex !important;
    flex-direction: column !important;
    gap: 15px !important;
    margin-bottom: 15px !important;
}

.section {
    background: white !important;
    border: 1px solid #e2e8f0 !important;
    padding: 12px !important;
    border-radius: 6px !important;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1) !important;
}

.settings-section {
    width: 22% !important;
    flex-shrink: 0 !important;
}

.sudoku-section {
    width: 78% !important;
    flex-shrink: 0 !important;
}

.stats-section,
.tips-section {
    width: 100% !important;
}

.section h3 {
    font-size: 1.1em !important;
    color: #2d3748 !important;
    margin: 0 0 12px 0 !important;
    padding-bottom: 6px !important;
    border-bottom: 2px solid #e2e8f0 !important;
    font-weight: 600 !important;
    display: flex !important;
    align-items: center !important;
    justify-content: space-between !important;
    flex-wrap: wrap !important;
}

.sudoku-info {
    font-size: 0.8em !important;
    color: #718096 !important;
    font-weight: 500 !important;
    background: #e2e8f0 !important;
    padding: 2px 8px !important;
    border-radius: 12px !important;
}

/* 통계 섹션 */
.stats-toggle,
.tips-toggle {
    background: none !important;
    border: none !important;
    color: #4a5568 !important;
    cursor: pointer !important;
    padding: 4px !important;
    border-radius: 4px !important;
    transition: all 0.2s ease !important;
}

.stats-toggle:hover,
.tips-toggle:hover {
    background: #f7fafc !important;
}

.stats-toggle svg,
.tips-toggle svg {
    transition: transform 0.2s ease !important;
}

.stats-toggle.collapsed svg,
.tips-toggle.collapsed svg {
    transform: rotate(-90deg) !important;
}

.stats-content,
.tips-content {
    display: flex !important;
    flex-direction: column !important;
    gap: 12px !important;
    transition: all 0.3s ease !important;
}

.stats-content.collapsed,
.tips-content.collapsed {
    display: none !important;
}

.stats-grid {
    display: grid !important;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)) !important;
    gap: 10px !important;
}

.stat-card {
    background: linear-gradient(135deg, #f7fafc 0%, #edf2f7 100%) !important;
    padding: 12px !important;
    border-radius: 6px !important;
    border: 1px solid #e2e8f0 !important;
    text-align: center !important;
}

.stat-label {
    font-size: 0.8em !important;
    color: #718096 !important;
    font-weight: 600 !important;
    margin-bottom: 6px !important;
}

.stat-value {
    font-size: 1.3em !important;
    color: #2d3748 !important;
    font-weight: 700 !important;
    margin-bottom: 4px !important;
}

.stat-time {
    font-size: 0.75em !important;
    color: #4a5568 !important;
    font-weight: 500 !important;
}

.reset-stats-btn {
    padding: 8px 16px !important;
    background: linear-gradient(135deg, #fc8181, #e53e3e) !important;
    color: white !important;
    border: none !important;
    border-radius: 4px !important;
    font-size: 0.85em !important;
    font-weight: 600 !important;
    cursor: pointer !important;
    transition: all 0.2s ease !important;
    align-self: flex-end !important;
}

.reset-stats-btn:hover {
    transform: translateY(-1px) !important;
    box-shadow: 0 2px 8px rgba(229, 62, 62, 0.4) !important;
}

/* 타이머 표시 */
.timer-display {
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    gap: 8px !important;
    margin-bottom: 12px !important;
    padding: 10px !important;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%) !important;
    color: white !important;
    border-radius: 6px !important;
    font-size: 1.3em !important;
    font-weight: 700 !important;
    box-shadow: 0 2px 6px rgba(102, 126, 234, 0.3) !important;
}

.timer-display svg {
    color: white !important;
}

.timer-control-btn {
    background: rgba(255, 255, 255, 0.2) !important;
    border: 1px solid rgba(255, 255, 255, 0.3) !important;
    color: white !important;
    width: 28px !important;
    height: 28px !important;
    border-radius: 4px !important;
    cursor: pointer !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    transition: all 0.2s ease !important;
    margin-left: 8px !important;
}

.timer-control-btn:hover {
    background: rgba(255, 255, 255, 0.3) !important;
}

/* 게임 상태 */
.game-status {
    display: flex !important;
    align-items: center !important;
    gap: 12px !important;
    width: 100% !important;
    margin-bottom: 12px !important;
}

.status-item {
    display: flex !important;
    align-items: center !important;
    gap: 12px !important;
    width: 100% !important;
}

.status-label {
    font-size: 0.9em !important;
    font-weight: 600 !important;
    color: #4a5568 !important;
    flex-shrink: 0 !important;
}

.progress-bar-container {
    display: flex !important;
    align-items: center !important;
    gap: 10px !important;
    flex: 1 !important;
}

.progress-bar {
    flex: 1 !important;
    height: 10px !important;
    background: #e2e8f0 !important;
    border-radius: 5px !important;
    overflow: hidden !important;
}

.progress-fill {
    height: 100% !important;
    background: linear-gradient(90deg, #48bb78, #38a169) !important;
    transition: width 0.3s ease !important;
}

.progress-text {
    font-size: 0.9em !important;
    font-weight: 700 !important;
    color: #2d3748 !important;
    min-width: 45px !important;
    text-align: right !important;
}

/* 설정 그룹 */
.setting-group {
    margin-bottom: 12px !important;
}

.setting-group label {
    display: flex !important;
    align-items: center !important;
    justify-content: space-between !important;
    font-size: 0.9em !important;
    font-weight: 600 !important;
    color: #4a5568 !important;
    margin-bottom: 6px !important;
}

.complexity-indicator {
    font-size: 0.8em !important;
    color: #ed8936 !important;
    font-weight: 500 !important;
}

/* 게임 옵션 토글 */
.game-options {
    display: flex !important;
    flex-direction: column !important;
    gap: 8px !important;
}

.toggle-option {
    display: flex !important;
    align-items: center !important;
    gap: 10px !important;
    cursor: pointer !important;
    padding: 8px !important;
    background: #f7fafc !important;
    border-radius: 4px !important;
    transition: background 0.2s ease !important;
}

.toggle-option:hover {
    background: #edf2f7 !important;
}

.toggle-option input[type="checkbox"] {
    display: none !important;
}

.toggle-slider {
    width: 40px !important;
    height: 20px !important;
    background: #cbd5e0 !important;
    border-radius: 10px !important;
    position: relative !important;
    transition: background 0.3s ease !important;
    flex-shrink: 0 !important;
}

.toggle-slider::after {
    content: '' !important;
    position: absolute !important;
    width: 16px !important;
    height: 16px !important;
    background: white !important;
    border-radius: 50% !important;
    top: 2px !important;
    left: 2px !important;
    transition: transform 0.3s ease !important;
}

.toggle-option input[type="checkbox"]:checked + .toggle-slider {
    background: #48bb78 !important;
}

.toggle-option input[type="checkbox"]:checked + .toggle-slider::after {
    transform: translateX(20px) !important;
}

.toggle-label {
    font-size: 0.85em !important;
    color: #4a5568 !important;
    font-weight: 500 !important;
}

/* 난이도 버튼들 */
.difficulty-buttons {
    display: grid !important;
    grid-template-columns: 1fr 1fr !important;
    gap: 4px !important;
}

.difficulty-btn {
    padding: 6px 8px !important;
    border: 1px solid #cbd5e0 !important;
    background: white !important;
    color: #4a5568 !important;
    border-radius: 4px !important;
    font-size: 0.75em !important;
    font-weight: 500 !important;
    cursor: pointer !important;
    transition: all 0.2s ease !important;
    text-align: center !important;
}

.difficulty-btn:hover {
    background: #f7fafc !important;
    border-color: #4299e1 !important;
    transform: translateY(-1px) !important;
}

.difficulty-btn.active {
    background: linear-gradient(135deg, #4299e1, #3182ce) !important;
    color: white !important;
    border-color: #3182ce !important;
}

/* 컨트롤 버튼들 */
.control-buttons {
    display: flex !important;
    flex-direction: column !important;
    gap: 6px !important;
    margin-top: 15px !important;
}

.generate-btn,
.solution-btn,
.hint-btn,
.check-btn,
.reset-btn,
.download-btn {
    padding: 8px 12px !important;
    border: none !important;
    border-radius: 4px !important;
    font-size: 0.8em !important;
    font-weight: 600 !important;
    cursor: pointer !important;
    transition: all 0.2s ease !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    gap: 6px !important;
}

.generate-btn {
    background: linear-gradient(135deg, #48bb78, #38a169) !important;
    color: white !important;
}

.generate-btn:hover:not(:disabled) {
    transform: translateY(-1px) !important;
    box-shadow: 0 2px 8px rgba(72, 187, 120, 0.4) !important;
}

.solution-btn {
    background: linear-gradient(135deg, #ed8936, #dd6b20) !important;
    color: white !important;
}

.solution-btn:hover:not(:disabled) {
    transform: translateY(-1px) !important;
    box-shadow: 0 2px 8px rgba(237, 137, 54, 0.4) !important;
}

.solution-btn.active {
    background: linear-gradient(135deg, #f56565, #e53e3e) !important;
}

.hint-btn {
    background: linear-gradient(135deg, #9f7aea, #805ad5) !important;
    color: white !important;
}

.hint-btn:hover:not(:disabled) {
    transform: translateY(-1px) !important;
    box-shadow: 0 2px 8px rgba(159, 122, 234, 0.4) !important;
}

.check-btn {
    background: linear-gradient(135deg, #4299e1, #3182ce) !important;
    color: white !important;
}

.check-btn:hover:not(:disabled) {
    transform: translateY(-1px) !important;
    box-shadow: 0 2px 8px rgba(66, 153, 225, 0.4) !important;
}

.reset-btn {
    background: linear-gradient(135deg, #a0aec0, #718096) !important;
    color: white !important;
}

.reset-btn:hover:not(:disabled) {
    transform: translateY(-1px) !important;
    box-shadow: 0 2px 8px rgba(160, 174, 192, 0.4) !important;
}

.download-btn {
    background: linear-gradient(135deg, #667eea, #764ba2) !important;
    color: white !important;
}

.download-btn:hover:not(:disabled) {
    transform: translateY(-1px) !important;
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.4) !important;
}

.control-buttons button:disabled {
    opacity: 0.5 !important;
    cursor: not-allowed !important;
    transform: none !important;
}

/* 스도쿠 컨테이너 - 수정됨 */
.sudoku-container {
    background: white !important;
    border: 2px solid #e2e8f0 !important;
    border-radius: 6px !important;
    padding: 20px !important;
    min-height: 530px !important;
    display: block !important;
    text-align: center !important;
    position: relative !important;
}

.sudoku-placeholder {
    display: none !important;
}

/* 스도쿠 보드 - 수정됨 */
.sudoku-board {
    display: inline-block !important;
    border: 3px solid #2d3748 !important;
    border-radius: 4px !important;
    background: #2d3748 !important;
    vertical-align: middle !important;
}

.sudoku-row {
    display: flex !important;
}

.sudoku-cell {
    width: 50px !important;
    height: 50px !important;
    border: 1px solid #cbd5e0 !important;
    background: white !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    font-size: 1.5em !important;
    font-weight: 600 !important;
    cursor: pointer !important;
    transition: all 0.2s ease !important;
    position: relative !important;
}

.sudoku-cell:hover {
    background: #f7fafc !important;
}

.sudoku-cell.given {
    background: #e2e8f0 !important;
    color: #2d3748 !important;
    cursor: default !important;
    font-weight: 700 !important;
}

.sudoku-cell.selected {
    background: #bee3f8 !important;
    border-color: #4299e1 !important;
    box-shadow: 0 0 0 2px #4299e1 !important;
}

.sudoku-cell.highlight {
    background: #fef5e7 !important;
}

.sudoku-cell.error {
    background: #fed7d7 !important;
    color: #c53030 !important;
}

.sudoku-cell.hint {
    background: #d6f5d6 !important;
    color: #22543d !important;
    animation: hintPulse 0.5s ease-in-out !important;
}

.sudoku-cell.solved {
    background: #c6f6d5 !important;
    color: #22543d !important;
}

/* 메모 스타일 */
.sudoku-cell .notes {
    position: absolute !important;
    top: 3px !important;
    left: 3px !important;
    font-size: 0.32em !important;
    font-weight: 500 !important;
    color: #4a5568 !important;
    line-height: 1.3 !important;
    display: flex !important;
    flex-wrap: wrap !important;
    gap: 2px !important;
    max-width: 44px !important;
}

.sudoku-cell .notes span {
    display: inline-block !important;
    min-width: 12px !important;
}

/* 3x3 박스 구분선 */
.sudoku-cell:nth-child(3),
.sudoku-cell:nth-child(6) {
    border-right: 2px solid #2d3748 !important;
}

.sudoku-row:nth-child(3) .sudoku-cell,
.sudoku-row:nth-child(6) .sudoku-cell {
    border-bottom: 2px solid #2d3748 !important;
}

@keyframes hintPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

/* 숫자 입력 컨트롤 */
.sudoku-controls {
    margin-top: 15px !important;
    display: flex !important;
    flex-direction: column !important;
    gap: 12px !important;
}

.number-inputs {
    display: flex !important;
    flex-direction: column !important;
    gap: 10px !important;
}

/* 모드 토글 */
.mode-toggle {
    display: flex !important;
    gap: 6px !important;
    justify-content: center !important;
}

.mode-btn {
    padding: 6px 12px !important;
    border: 1px solid #cbd5e0 !important;
    background: white !important;
    color: #4a5568 !important;
    border-radius: 4px !important;
    font-size: 0.8em !important;
    font-weight: 600 !important;
    cursor: pointer !important;
    transition: all 0.2s ease !important;
    display: flex !important;
    align-items: center !important;
    gap: 4px !important;
}

.mode-btn:hover {
    background: #f7fafc !important;
    border-color: #4299e1 !important;
}

.mode-btn.active {
    background: #4299e1 !important;
    color: white !important;
    border-color: #3182ce !important;
}

.number-buttons {
    display: flex !important;
    gap: 6px !important;
    flex-wrap: wrap !important;
    justify-content: center !important;
}

.number-btn {
    width: 40px !important;
    height: 40px !important;
    border: 1px solid #cbd5e0 !important;
    background: white !important;
    color: #4a5568 !important;
    border-radius: 4px !important;
    font-size: 1.1em !important;
    font-weight: 600 !important;
    cursor: pointer !important;
    transition: all 0.2s ease !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
}

.number-btn:hover {
    background: #f7fafc !important;
    border-color: #4299e1 !important;
    transform: translateY(-1px) !important;
}

.number-btn.active {
    background: #4299e1 !important;
    color: white !important;
    border-color: #3182ce !important;
}

.erase-btn {
    background: #fed7d7 !important;
    border-color: #fc8181 !important;
    color: #c53030 !important;
}

.erase-btn:hover {
    background: #fc8181 !important;
    color: white !important;
}

/* 팁 섹션 */
.tips-row {
    display: grid !important;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)) !important;
    gap: 8px !important;
}

.tip-item {
    display: flex !important;
    align-items: flex-start !important;
    gap: 8px !important;
    padding: 8px !important;
    background: #f7fafc !important;
    border-radius: 4px !important;
    font-size: 0.85em !important;
    line-height: 1.4 !important;
    border-left: 3px solid #4299e1 !important;
}

.tip-item svg {
    flex-shrink: 0 !important;
    margin-top: 2px !important;
    color: #4299e1 !important;
}

.tip-item strong {
    color: #2d3748 !important;
}

/* 공지사항 */
.notice {
    text-align: center !important;
    font-size: 0.8em !important;
    color: #4a5568 !important;
    padding: 10px !important;
    background: linear-gradient(135deg, #fef5e7, #fed7aa) !important;
    border: 1px solid #f6ad55 !important;
    border-radius: 4px !important;
    line-height: 1.4 !important;
}

.notice strong {
    color: #c05621 !important;
}

/* 로딩 애니메이션 */
.generating {
    animation: pulse 1.5s ease-in-out infinite !important;
}

@keyframes pulse {
    0%, 100% { opacity: 0.7; }
    50% { opacity: 1; }
}

/* 모바일 반응형 */
@media (max-width: 768px) {
    .sudoku-generator {
        padding: 8px !important;
        margin: 0 !important;
        border-radius: 0 !important;
    }
    
    .sudoku-generator h2 {
        font-size: 1.3em !important;
        padding: 10px !important;
        margin-bottom: 15px !important;
    }
    
    .stats-grid {
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)) !important;
    }
    
    .main-container {
        flex-direction: column !important;
        gap: 12px !important;
    }
    
    .settings-section,
    .sudoku-section {
        width: 100% !important;
    }
    
    .section {
        padding: 10px !important;
    }
    
    .section h3 {
        font-size: 1em !important;
        margin-bottom: 10px !important;
    }
    
    .timer-display {
        font-size: 1.1em !important;
        padding: 8px !important;
    }
    
    .setting-group {
        margin-bottom: 10px !important;
    }
    
    .difficulty-buttons {
        grid-template-columns: 1fr 1fr !important;
        gap: 4px !important;
    }
    
    .difficulty-btn {
        padding: 5px 6px !important;
        font-size: 0.7em !important;
    }
    
    .control-buttons {
        grid-template-columns: 1fr 1fr !important;
        display: grid !important;
        gap: 6px !important;
    }
    
    .control-buttons button {
        padding: 6px 8px !important;
        font-size: 0.75em !important;
    }
    
    .sudoku-container {
        padding: 15px !important;
        min-height: 380px !important;
    }
    
    .sudoku-cell {
        width: 34px !important;
        height: 34px !important;
        font-size: 1.1em !important;
    }
    
    .number-btn {
        width: 34px !important;
        height: 34px !important;
        font-size: 0.95em !important;
    }
    
    .mode-btn {
        padding: 5px 10px !important;
        font-size: 0.75em !important;
    }
    
    .tips-row {
        grid-template-columns: 1fr !important;
        gap: 6px !important;
    }
    
    .tip-item {
        padding: 6px !important;
        font-size: 0.8em !important;
    }
    
    .notice {
        font-size: 0.75em !important;
        padding: 8px !important;
    }
}

@media (max-width: 480px) {
    .sudoku-generator {
        padding: 5px !important;
    }
    
    .sudoku-generator h2 {
        font-size: 1.1em !important;
        padding: 8px !important;
    }
    
    .section {
        padding: 8px !important;
    }
    
    .timer-display {
        font-size: 1em !important;
        padding: 6px !important;
    }
    
    .sudoku-cell {
        width: 30px !important;
        height: 30px !important;
        font-size: 1em !important;
    }
    
    .number-btn {
        width: 30px !important;
        height: 30px !important;
        font-size: 0.85em !important;
    }
    
    .sudoku-container {
        padding: 10px !important;
        min-height: 320px !important;
    }
}