/**
 * 数独游戏特定样式
 * 基于InstantGames设计系统
 */

/* ===== 游戏特定变量 ===== */
:root {
    /* 数独网格颜色 */
    --sudoku-grid-bg: var(--surface-color);
    --sudoku-cell-bg: var(--surface-color);
    --sudoku-cell-border: #e0e0e0;
    --sudoku-thick-border: var(--text-secondary);
    --sudoku-selected-bg: rgba(76, 175, 80, 0.1);
    --sudoku-highlight-bg: rgba(76, 175, 80, 0.05);
    --sudoku-error-bg: rgba(244, 67, 54, 0.1);
    --sudoku-error-text: var(--error-color);
    --sudoku-given-text: var(--text-primary);
    --sudoku-user-text: var(--primary-color);
    --sudoku-notes-text: var(--text-tertiary);
}

/* 暗黑主题适配 */
[data-theme="dark"] {
    --sudoku-cell-border: #404040;
    --sudoku-thick-border: #666666;
}

/* ===== 数独网格样式 ===== */
.sudoku-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-lg);
    margin: var(--space-lg) 0;
}

.sudoku-grid {
    display: grid;
    grid-template-columns: repeat(9, 1fr);
    grid-template-rows: repeat(9, 1fr);
    gap: 1px;
    background-color: var(--sudoku-thick-border);
    border: 2px solid var(--sudoku-thick-border);
    border-radius: var(--radius-md);
    padding: 2px;
    width: min(90vw, 450px);
    height: min(90vw, 450px);
    box-shadow: var(--shadow-md);
}

.sudoku-cell {
    background-color: var(--sudoku-cell-bg);
    border: 1px solid var(--sudoku-cell-border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: clamp(16px, 4vw, 24px);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    user-select: none;
}

.sudoku-cell:hover {
    background-color: var(--sudoku-highlight-bg);
}

.sudoku-cell.selected {
    background-color: var(--sudoku-selected-bg);
    border-color: var(--primary-color);
    box-shadow: inset 0 0 0 2px var(--primary-color);
}

.sudoku-cell.highlighted {
    background-color: var(--sudoku-highlight-bg);
}

.sudoku-cell.error {
    background-color: var(--sudoku-error-bg);
    color: var(--sudoku-error-text);
}

.sudoku-cell.given {
    color: var(--sudoku-given-text);
    font-weight: 700;
    background-color: rgba(0, 0, 0, 0.02);
}

.sudoku-cell.user-input {
    color: var(--sudoku-user-text);
    font-weight: 600;
}

/* 3x3宫格边框 */
.sudoku-cell:nth-child(3n) {
    border-right: 2px solid var(--sudoku-thick-border);
}

.sudoku-cell:nth-child(n+19):nth-child(-n+27),
.sudoku-cell:nth-child(n+46):nth-child(-n+54) {
    border-bottom: 2px solid var(--sudoku-thick-border);
}

/* 笔记模式 */
.sudoku-cell .notes {
    position: absolute;
    top: 2px;
    left: 2px;
    right: 2px;
    bottom: 2px;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(3, 1fr);
    font-size: clamp(8px, 1.5vw, 10px);
    color: var(--sudoku-notes-text);
    pointer-events: none;
}

.sudoku-cell .notes .note {
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 400;
}

/* ===== 数字输入面板 ===== */
.number-panel {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    width: 100%;
    max-width: 450px;
}

.number-buttons {
    display: grid;
    grid-template-columns: repeat(9, 1fr);
    gap: var(--space-sm);
}

.number-btn {
    aspect-ratio: 1;
    border: 2px solid var(--text-tertiary);
    background-color: var(--surface-color);
    color: var(--text-primary);
    font-size: var(--font-size-lg);
    font-weight: 600;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
}

.number-btn:hover {
    background-color: var(--primary-light);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.number-btn:active {
    transform: translateY(0);
}

.number-btn.selected {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.action-buttons {
    display: flex;
    gap: var(--space-sm);
    justify-content: center;
}

/* ===== 游戏信息面板 ===== */
.game-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.info-section {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.difficulty-selector {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.game-stats {
    display: flex;
    gap: var(--space-lg);
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xs);
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    font-weight: 600;
}

.stat-value {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--text-primary);
}

.game-controls {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
    justify-content: center;
}

/* ===== 主题预览样式 ===== */
.theme-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: var(--space-md);
}

.theme-option {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md);
    border: 2px solid transparent;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-base);
}

.theme-option:hover {
    border-color: var(--primary-color);
    background-color: rgba(76, 175, 80, 0.05);
}

.theme-option.active {
    border-color: var(--primary-color);
    background-color: rgba(76, 175, 80, 0.1);
}

.theme-preview {
    width: 60px;
    height: 40px;
    border-radius: var(--radius-sm);
    border: 1px solid rgba(0, 0, 0, 0.1);
}

.modern-preview {
    background: linear-gradient(135deg, #f5f5f7 0%, #ffffff 100%);
}

.classic-preview {
    background: linear-gradient(135deg, #f0f0f0 0%, #ffffff 100%);
}

.dark-preview {
    background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
}

.rainbow-preview {
    background: linear-gradient(135deg, #ff6b6b 0%, #4ecdc4 50%, #45b7d1 100%);
}

.theme-name {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-primary);
}

/* ===== 完成统计样式 ===== */
.completion-stats {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.stat-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-sm) 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.stat-row:last-child {
    border-bottom: none;
}

.stat-row span:first-child {
    font-weight: 600;
    color: var(--text-secondary);
}

.stat-row span:last-child {
    font-weight: 700;
    color: var(--text-primary);
}

/* ===== 游戏说明样式 ===== */
.instructions-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.instruction-item {
    display: flex;
    gap: var(--space-md);
    align-items: flex-start;
}

.instruction-icon {
    font-size: var(--font-size-xl);
    flex-shrink: 0;
}

.instruction-text {
    flex: 1;
    line-height: 1.5;
}

.instruction-text strong {
    color: var(--primary-color);
}

/* ===== 统计网格样式 ===== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: var(--space-md);
}

.stats-grid .stat-item {
    text-align: center;
    padding: var(--space-md);
    background-color: rgba(76, 175, 80, 0.05);
    border-radius: var(--radius-md);
}

/* ===== 相关游戏样式 ===== */
.games-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--space-md);
}

.game-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md);
    background-color: var(--surface-color);
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-radius: var(--radius-lg);
    text-decoration: none;
    color: inherit;
    transition: all var(--transition-base);
}

.game-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-color);
}

.game-icon {
    font-size: var(--font-size-3xl);
}

.game-card h4 {
    margin: 0;
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--text-primary);
}

.game-card p {
    margin: 0;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    text-align: center;
}

/* ===== 分享按钮样式 ===== */
.share-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: var(--space-sm);
}

/* ===== 加载屏幕样式 ===== */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--bg-color);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 1;
    visibility: visible;
    transition: all var(--transition-base);
}

.loading-screen.hidden {
    opacity: 0;
    visibility: hidden;
}

.loading-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-lg);
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(76, 175, 80, 0.2);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading-text {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
}

/* ===== 响应式设计 ===== */
@media (max-width: 768px) {
    .sudoku-grid {
        width: min(95vw, 350px);
        height: min(95vw, 350px);
    }
    
    .sudoku-cell {
        font-size: clamp(14px, 5vw, 20px);
    }
    
    .number-buttons {
        grid-template-columns: repeat(3, 1fr);
        grid-template-rows: repeat(3, 1fr);
    }
    
    .number-btn {
        font-size: var(--font-size-base);
    }
    
    .info-section {
        flex-direction: column;
        align-items: stretch;
    }
    
    .game-stats {
        justify-content: space-around;
    }
    
    .game-controls {
        grid-template-columns: repeat(2, 1fr);
        display: grid;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .games-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .sudoku-grid {
        width: min(98vw, 300px);
        height: min(98vw, 300px);
    }
    
    .sudoku-cell {
        font-size: clamp(12px, 4vw, 16px);
    }
    
    .number-btn {
        font-size: var(--font-size-sm);
        min-height: 40px;
    }
    
    .game-controls {
        grid-template-columns: 1fr;
    }
    
    .share-buttons {
        grid-template-columns: 1fr;
    }
}

/* ===== 无障碍支持 ===== */
@media (prefers-reduced-motion: reduce) {
    .sudoku-cell,
    .number-btn,
    .theme-option,
    .game-card {
        transition: none;
    }
    
    .loading-spinner {
        animation: none;
    }
}

/* ===== 高对比度模式 ===== */
@media (prefers-contrast: high) {
    .sudoku-cell {
        border-width: 2px;
    }
    
    .number-btn {
        border-width: 3px;
    }
}