/* 收藏夹和错题本页面样式 */

/* 头部样式 */
.header {
    background-color: var(--surface);
    box-shadow: var(--elevation-1);
    padding: var(--spacing-md) 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.header-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.back-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: transparent;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.2s ease;
}

.back-btn:hover {
    background-color: rgba(0, 0, 0, 0.04);
    color: var(--text-primary);
}

[data-theme="dark"] .back-btn:hover {
    background-color: rgba(255, 255, 255, 0.04);
}

.header-title {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.theme-toggle,
.action-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: none;
    border-radius: 50%;
    background-color: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
}

.theme-toggle:hover,
.action-btn:hover {
    background-color: rgba(0, 0, 0, 0.04);
    color: var(--text-primary);
}

[data-theme="dark"] .theme-toggle:hover,
[data-theme="dark"] .action-btn:hover {
    background-color: rgba(255, 255, 255, 0.04);
}

/* 主要内容区域 */
.main {
    padding: var(--spacing-lg) 0;
}

/* 统计信息区域 */
.stats-section {
    margin-bottom: var(--spacing-xl);
}

.stats-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.stats-card {
    background-color: var(--surface);
    border-radius: var(--border-radius-medium);
    box-shadow: var(--elevation-1);
    padding: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.stats-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background-color: rgba(25, 118, 210, 0.1);
    color: var(--primary-color);
}

.stats-icon.error {
    background-color: rgba(244, 67, 54, 0.1);
    color: #f44336;
}

[data-theme="dark"] .stats-icon {
    background-color: rgba(187, 134, 252, 0.1);
}

[data-theme="dark"] .stats-icon.error {
    background-color: rgba(244, 67, 54, 0.1);
    color: #ef5350;
}

.stats-info {
    flex: 1;
}

.stats-number {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.stats-label {
    font-size: 14px;
    color: var(--text-secondary);
}

.subject-stats {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.subject-stat {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 14px;
}

.subject-name {
    color: var(--text-primary);
}

.subject-count {
    color: var(--text-secondary);
    font-weight: 500;
}

/* 筛选区域 */
.filter-section {
    margin-bottom: var(--spacing-xl);
}

.filter-controls {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    align-items: flex-end;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    min-width: 150px;
}

.filter-group label {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
}

.filter-select {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--outline);
    border-radius: var(--border-radius-small);
    background-color: var(--surface);
    color: var(--text-primary);
    font-family: var(--font-family);
    font-size: 14px;
    cursor: pointer;
    transition: border-color 0.2s ease;
}

.filter-select:focus {
    outline: none;
    border-color: var(--primary-color);
}

.search-box {
    position: relative;
    display: flex;
    align-items: center;
    background-color: var(--surface);
    border: 1px solid var(--outline);
    border-radius: var(--border-radius-small);
    padding: var(--spacing-sm) var(--spacing-md);
    min-width: 200px;
    transition: border-color 0.2s ease;
}

.search-box:focus-within {
    border-color: var(--primary-color);
}

.search-box .material-icons {
    color: var(--text-secondary);
    margin-right: var(--spacing-sm);
    font-size: 20px;
}

.search-box input {
    flex: 1;
    border: none;
    background: transparent;
    color: var(--text-primary);
    font-size: 14px;
    outline: none;
}

.search-box input::placeholder {
    color: var(--text-secondary);
}

/* 题目区域 */
.questions-section {
    margin-bottom: var(--spacing-xl);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.section-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 20px;
    font-weight: 500;
    color: var(--text-primary);
    margin: 0;
}

.section-title .material-icons {
    color: var(--primary-color);
}

.section-title .count {
    background-color: var(--primary-color);
    color: var(--on-primary);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-large);
    font-size: 12px;
    font-weight: 500;
    margin-left: var(--spacing-sm);
}

.view-controls {
    display: flex;
    gap: var(--spacing-xs);
}

.view-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: none;
    border-radius: var(--border-radius-small);
    background-color: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
}

.view-btn:hover {
    background-color: rgba(0, 0, 0, 0.04);
}

[data-theme="dark"] .view-btn:hover {
    background-color: rgba(255, 255, 255, 0.04);
}

.view-btn.active {
    background-color: var(--primary-color);
    color: var(--on-primary);
}

/* 题目容器 */
.questions-container {
    background-color: var(--surface);
    border-radius: var(--border-radius-medium);
    box-shadow: var(--elevation-1);
    overflow: hidden;
}

.questions-list {
    padding: var(--spacing-md);
}

/* 列表视图 */
.questions-list.list-view .question-item {
    display: flex;
    flex-direction: column;
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--divider);
    text-decoration: none;
    color: var(--text-primary);
    transition: background-color 0.2s ease;
}

.questions-list.list-view .question-item:hover {
    background-color: rgba(0, 0, 0, 0.02);
}

[data-theme="dark"] .questions-list.list-view .question-item:hover {
    background-color: rgba(255, 255, 255, 0.02);
}

.questions-list.list-view .question-item:last-child {
    border-bottom: none;
}

/* 网格视图 */
.questions-list.grid-view {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.questions-list.grid-view .question-item {
    background-color: var(--background);
    border: 1px solid var(--divider);
    border-radius: var(--border-radius-small);
    padding: var(--spacing-md);
    text-decoration: none;
    color: var(--text-primary);
    transition: all 0.2s ease;
}

.questions-list.grid-view .question-item:hover {
    box-shadow: var(--elevation-1);
    transform: translateY(-1px);
}

/* 题目项样式 */
.question-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-sm);
}

.question-text {
    flex: 1;
    font-weight: 500;
    line-height: 1.4;
    margin-right: var(--spacing-sm);
}

.question-actions {
    display: flex;
    gap: var(--spacing-xs);
    flex-shrink: 0;
}

.question-action-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border: none;
    border-radius: 50%;
    background-color: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
}

.question-action-btn:hover {
    background-color: rgba(0, 0, 0, 0.04);
}

[data-theme="dark"] .question-action-btn:hover {
    background-color: rgba(255, 255, 255, 0.04);
}

.question-action-btn.remove {
    color: #f44336;
}

.question-action-btn.remove:hover {
    background-color: rgba(244, 67, 54, 0.1);
}

.question-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    font-size: 14px;
    color: var(--text-secondary);
    margin-top: var(--spacing-sm);
}

.question-meta span {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.question-meta .material-icons {
    font-size: 16px;
}

/* 空状态 */
.empty-state {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--text-secondary);
}

.empty-state .material-icons {
    font-size: 64px;
    margin-bottom: var(--spacing-md);
    opacity: 0.5;
}

.empty-state p {
    font-size: 16px;
    margin: 0;
}

/* 对话框样式 */
.dialog-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.dialog {
    background-color: var(--surface);
    border-radius: var(--border-radius-medium);
    box-shadow: var(--elevation-4);
    max-width: 400px;
    width: 90%;
    overflow: hidden;
}

.dialog-header {
    padding: var(--spacing-lg) var(--spacing-lg) var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--divider);
}

.dialog-header h3 {
    margin: 0;
    font-size: 18px;
    font-weight: 500;
    color: var(--text-primary);
}

.dialog-content {
    padding: var(--spacing-md) var(--spacing-lg);
}

.dialog-content p {
    margin: 0;
    color: var(--text-secondary);
    line-height: 1.5;
}

.dialog-actions {
    padding: var(--spacing-md) var(--spacing-lg) var(--spacing-lg) var(--spacing-lg);
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-sm);
}

/* 响应式设计 */
/* 针对720P以上移动设备优化 (720px - 1024px) */
@media (max-width: 1024px) and (min-width: 720px) {
    .container {
        padding: 0 var(--spacing-lg);
    }
    
    .stats-cards {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-lg);
    }
    
    .stats-card {
        padding: var(--spacing-lg);
    }
    
    .filter-controls {
        gap: var(--spacing-lg);
    }
    
    .filter-group {
        min-width: 160px;
    }
    
    .search-box {
        min-width: 240px;
    }
    
    .questions-list.grid-view {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-lg);
    }
    
    .question-item {
        padding: var(--spacing-lg);
    }
    
    .question-text {
        font-size: 15px;
        line-height: 1.5;
    }
    
    /* 优化触摸交互 */
    .view-btn {
        min-width: 44px;
        min-height: 44px;
    }
    
    .question-action-btn {
        min-width: 40px;
        min-height: 40px;
    }
    
    .back-btn {
        min-width: 44px;
        min-height: 44px;
    }
    
    .theme-toggle {
        min-width: 44px;
        min-height: 44px;
    }
    
    .filter-select {
        padding: var(--spacing-md);
        font-size: 15px;
    }
}

@media (max-width: 768px) {
    /* 修复移动端header布局 */
    .header .container {
        flex-wrap: nowrap;
        justify-content: space-between;
        align-items: center;
    }
    
    .header-left {
        flex: 1;
        min-width: 0;
    }
    
    .header-title {
        font-size: 18px;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }
    
    .header-actions {
        flex-shrink: 0;
    }
    
    .filter-controls {
        flex-direction: column;
        align-items: stretch;
        gap: var(--spacing-md);
    }
    
    .filter-group {
        min-width: auto;
    }
    
    .search-box {
        min-width: auto;
    }
    
    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-md);
    }
    
    .view-controls {
        align-self: flex-end;
    }
    
    /* 在移动端隐藏网格视图选项 */
    .view-btn[data-view="grid"] {
        display: none;
    }
    
    .questions-list.grid-view {
        grid-template-columns: 1fr;
    }
    
    /* 修复题目和按钮对齐问题 */
    .question-header {
        display: flex;
        justify-content: space-between;
        align-items: center;
        flex-wrap: nowrap;
    }
    
    .question-text {
        flex: 1;
        font-size: 16px;
        line-height: 1.6;
        margin-right: var(--spacing-sm);
        min-width: 0;
    }
    
    .question-actions {
        flex-shrink: 0;
        margin-top: 0;
    }
    
    .question-item {
        padding: var(--spacing-lg);
    }
    
    /* 优化移动端触摸体验 */
    .view-btn {
        min-width: 48px;
        min-height: 48px;
    }
    
    .question-action-btn {
        min-width: 44px;
        min-height: 44px;
    }
    
    .back-btn {
        min-width: 48px;
        min-height: 48px;
    }
    
    .theme-toggle {
        min-width: 48px;
        min-height: 48px;
    }
    
    .filter-select {
        padding: var(--spacing-md);
        font-size: 16px;
    }
}

@media (max-width: 480px) {
    .main {
        padding: var(--spacing-md) 0;
    }
    
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .stats-cards {
        grid-template-columns: 1fr;
    }
    
    .stats-card {
        padding: var(--spacing-md);
    }
    
    .header-title {
        font-size: 16px;
    }
    
    .section-title {
        font-size: 18px;
    }
    
    .question-item {
        padding: var(--spacing-md);
    }
    
    .question-text {
        font-size: 15px;
    }
}