/* ========== 阅读材料页面样式 - 苹果设计系统适配版 ========== */

/* 阅读材料网格 */
.reading-passages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 24px;
    margin-bottom: 40px;
}

/* 阅读材料卡片 */
.reading-passage-card {
    background: var(--apple-card-bg);
    border-radius: 18px;
    padding: 28px;
    box-shadow: var(--apple-shadow-sm);
    transition: var(--apple-transition);
    cursor: pointer;
    border: 1px solid var(--apple-gray-3);
    display: flex;
    flex-direction: column;
    height: 100%;
    position: relative;
    overflow: hidden;
}

.reading-passage-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--apple-shadow-lg);
    border-color: var(--apple-primary);
}

/* 阅读材料颜色变体 */
.passage-color-1 {
    border-left: 4px solid var(--apple-primary);
}

.passage-color-2 {
    border-left: 4px solid var(--apple-success);
}

.passage-color-3 {
    border-left: 4px solid var(--apple-warning);
}

.passage-color-4 {
    border-left: 4px solid var(--apple-danger);
}

.passage-color-5 {
    border-left: 4px solid var(--apple-secondary);
}

/* 卡片头部 */
.passage-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 20px;
    gap: 12px;
}

/* 难度徽章 */
.difficulty-badge {
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.difficulty-badge.easy {
    background: #d4edda;
    color: var(--apple-success);
    border: 1px solid rgba(52, 199, 89, 0.3);
}

.difficulty-badge.medium {
    background: #fff3cd;
    color: var(--apple-warning);
    border: 1px solid rgba(255, 149, 0, 0.3);
}

.difficulty-badge.hard {
    background: #f8d7da;
    color: var(--apple-danger);
    border: 1px solid rgba(255, 59, 48, 0.3);
}

/* 内容类型徽章 */
.content-type-badge {
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    background: var(--apple-primary-light);
    color: var(--apple-primary);
    border: 1px solid var(--apple-gray-3);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

/* 标题 */
.passage-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
    line-height: 1.4;
    font-family: 'Comic Neue', 'Inter', sans-serif;
}

/* 预览内容 */
.passage-preview {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 24px;
    flex-grow: 1;
    font-size: 15px;
}

/* 标签系统 */
.passage-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 16px;
}

.tag {
    padding: 6px 12px;
    background: var(--apple-gray-4);
    color: var(--text-secondary);
    border-radius: 16px;
    font-size: 13px;
    font-weight: 500;
    border: 1px solid var(--apple-gray-3);
    transition: var(--apple-transition-fast);
}

.tag:hover {
    background: var(--apple-primary-light);
    color: var(--apple-primary);
    border-color: var(--apple-primary);
}

.more-tag {
    padding: 6px 12px;
    background: var(--apple-gray-3);
    color: var(--text-tertiary);
    border-radius: 16px;
    font-size: 13px;
    font-weight: 500;
}

/* 元数据网格 */
.passage-meta {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    margin-bottom: 24px;
    padding: 20px;
    background: var(--apple-gray-4);
    border-radius: 16px;
    border: 1px solid var(--apple-gray-3);
}

.meta-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    font-size: 14px;
    color: var(--text-secondary);
}

.meta-item .emoji {
    font-size: 18px;
    margin-bottom: 6px;
    filter: drop-shadow(1px 1px 2px rgba(0,0,0,0.1));
}

/* 操作按钮 */
.passage-actions {
    display: flex;
    gap: 12px;
    margin-top: auto;
}

.read-btn, .practice-btn {
    flex: 1;
    padding: 14px 0;
    border: none;
    border-radius: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--apple-transition-fast);
    font-size: 15px;
    font-family: inherit;
}

.read-btn {
    background: var(--apple-primary);
    color: var(--text-on-dark);
    box-shadow: 0 4px 12px rgba(0, 122, 255, 0.2);
}

.read-btn:hover {
    background: var(--apple-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 122, 255, 0.3);
}

.practice-btn {
    background: var(--apple-success);
    color: var(--text-on-dark);
    box-shadow: 0 4px 12px rgba(52, 199, 89, 0.2);
}

.practice-btn:hover {
    background: #30b453;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(52, 199, 89, 0.3);
}

/* ========== 模态框样式 ========== */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    z-index: 1000;
    overflow-y: auto;
    padding: 20px;
    justify-content: center;
    align-items: flex-start;
    backdrop-filter: blur(4px);
}

.modal-content {
    background: var(--apple-card-bg);
    border-radius: 20px;
    padding: 32px;
    max-width: 900px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    animation: slideIn 0.3s ease;
    box-shadow: var(--apple-shadow-lg);
    border: 1px solid var(--apple-gray-3);
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 模态框头部 */
.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 28px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--apple-gray-3);
}

.modal-header h2 {
    font-size: 28px;
    color: var(--text-primary);
    margin: 0;
    font-family: 'Comic Neue', 'Inter', sans-serif;
    flex: 1;
    padding-right: 24px;
    font-weight: 800;
    line-height: 1.3;
}

/* 元数据区域 */
.passage-metadata {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 16px;
    margin-bottom: 32px;
    padding: 24px;
    background: var(--apple-gray-4);
    border-radius: 18px;
    border: 1px solid var(--apple-gray-3);
}

.metadata-item {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 15px;
    color: var(--text-secondary);
    font-weight: 500;
}

.metadata-item .emoji {
    font-size: 20px;
    flex-shrink: 0;
}

/* 内容区域 */
.passage-content {
    margin-bottom: 32px;
}

.passage-content h3 {
    font-size: 20px;
    color: var(--apple-primary);
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--apple-gray-3);
    font-weight: 700;
}

.content-text {
    font-size: 17px;
    line-height: 1.7;
    color: var(--text-primary);
    padding: 24px;
    background: var(--apple-gray-4);
    border-radius: 16px;
    max-height: 400px;
    overflow-y: auto;
    border: 1px solid var(--apple-gray-3);
}

/* 详细部分 */
.detail-section {
    margin-bottom: 32px;
}

.detail-section h3 {
    font-size: 18px;
    color: var(--apple-success);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
}

/* 问题预览 */
.questions-preview {
    display: grid;
    gap: 16px;
}

.question-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px;
    background: var(--apple-card-bg);
    border-radius: 14px;
    border-left: 4px solid var(--apple-primary);
    box-shadow: var(--apple-shadow-sm);
    border: 1px solid var(--apple-gray-3);
    transition: var(--apple-transition-fast);
}

.question-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--apple-shadow-md);
}

.question-number {
    background: var(--apple-primary);
    color: var(--text-on-dark);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    flex-shrink: 0;
    font-size: 16px;
}

.question-text {
    flex: 1;
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.5;
}

.question-type {
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    background: var(--apple-primary-light);
    color: var(--apple-primary);
    border: 1px solid var(--apple-gray-3);
}

/* 单词预览 */
.words-preview {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.word-tag {
    padding: 10px 20px;
    background: var(--apple-primary);
    color: var(--text-on-dark);
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    transition: var(--apple-transition-fast);
    border: 1px solid transparent;
}

.word-tag:hover {
    background: var(--apple-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 122, 255, 0.2);
}

/* 详细页面操作按钮 */
.passage-actions-detail {
    display: flex;
    gap: 16px;
    margin-top: 40px;
    padding-top: 28px;
    border-top: 1px solid var(--apple-gray-3);
}

.passage-actions-detail button {
    flex: 1;
    padding: 18px 0;
    border: none;
    border-radius: 16px;
    font-weight: 600;
    font-size: 17px;
    cursor: pointer;
    transition: var(--apple-transition-fast);
    font-family: inherit;
}

.btn-primary {
    background: var(--apple-success);
    color: var(--text-on-dark);
    box-shadow: 0 4px 12px rgba(52, 199, 89, 0.2);
}

.btn-primary:hover {
    background: #30b453;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(52, 199, 89, 0.3);
}

.btn-secondary {
    background: transparent;
    color: var(--apple-primary);
    border: 1.5px solid var(--apple-primary);
}

.btn-secondary:hover {
    background: var(--apple-primary-light);
    transform: translateY(-2px);
}

/* ========== 响应式设计 ========== */
@media (max-width: 1024px) {
    .reading-passages-grid {
        grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
        gap: 20px;
    }
    
    .modal-content {
        max-width: 95%;
        padding: 24px;
    }
}

@media (max-width: 768px) {
    .reading-passages-grid {
        grid-template-columns: 1fr;
    }
    
    .passage-meta {
        grid-template-columns: repeat(2, 1fr);
        padding: 16px;
        gap: 10px;
    }
    
    .modal-content {
        padding: 20px;
        margin: 10px;
        max-height: 85vh;
    }
    
    .modal-header {
        flex-direction: column;
        gap: 16px;
    }
    
    .modal-header h2 {
        font-size: 24px;
        padding-right: 0;
    }
    
    .passage-metadata {
        grid-template-columns: repeat(2, 1fr);
        padding: 20px;
    }
    
    .content-text {
        padding: 20px;
        font-size: 16px;
    }
    
    .passage-actions-detail {
        flex-direction: column;
        gap: 12px;
    }
    
    .passage-actions {
        flex-direction: column;
        gap: 12px;
    }
    
    .question-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }
    
    .question-number {
        align-self: flex-start;
    }
}

@media (max-width: 480px) {
    .reading-passage-card {
        padding: 24px;
    }
    
    .passage-meta {
        grid-template-columns: 1fr;
    }
    
    .passage-header {
        flex-direction: column;
        gap: 12px;
        align-items: flex-start;
    }
    
    .passage-title {
        font-size: 18px;
    }
    
    .modal-content {
        padding: 16px;
    }
    
    .modal-header h2 {
        font-size: 20px;
    }
    
    .passage-metadata {
        grid-template-columns: 1fr;
        padding: 16px;
    }
    
    .metadata-item {
        font-size: 14px;
    }
    
    .content-text {
        padding: 16px;
        font-size: 15px;
        max-height: 300px;
    }
    
    .detail-section h3 {
        font-size: 16px;
    }
    
    .word-tag {
        padding: 8px 16px;
        font-size: 13px;
    }
    
    .question-text {
        font-size: 14px;
    }
}

/* 滚动条样式统一 */
.modal-content::-webkit-scrollbar,
.content-text::-webkit-scrollbar {
    width: 6px;
}

.modal-content::-webkit-scrollbar-track,
.content-text::-webkit-scrollbar-track {
    background: var(--apple-gray-3);
    border-radius: 3px;
}

.modal-content::-webkit-scrollbar-thumb,
.content-text::-webkit-scrollbar-thumb {
    background: var(--apple-primary);
    border-radius: 3px;
}

.modal-content::-webkit-scrollbar-thumb:hover,
.content-text::-webkit-scrollbar-thumb:hover {
    background: var(--apple-primary-dark);
}

/* 关闭按钮样式 */
.modal-close {
    position: absolute;
    top: 24px;
    right: 24px;
    width: 40px;
    height: 40px;
    background: var(--apple-card-bg);
    border: 1px solid var(--apple-gray-3);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--apple-transition-fast);
    color: var(--text-tertiary);
    font-size: 20px;
}

.modal-close:hover {
    background: var(--apple-danger);
    color: var(--text-on-dark);
    border-color: var(--apple-danger);
    transform: rotate(90deg);
}

/* 加载状态 */
.passage-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
    text-align: center;
    color: var(--text-tertiary);
}

.passage-loading .spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--apple-gray-3);
    border-top-color: var(--apple-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 20px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* 空状态 */
.passage-empty {
    text-align: center;
    padding: 60px 20px;
    background: var(--apple-card-bg);
    border-radius: 18px;
    border: 1px solid var(--apple-gray-3);
    box-shadow: var(--apple-shadow-sm);
}

.passage-empty-icon {
    font-size: 48px;
    color: var(--apple-gray-2);
    margin-bottom: 20px;
}

.passage-empty h3 {
    font-size: 20px;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.passage-empty p {
    font-size: 16px;
    color: var(--text-tertiary);
    margin-bottom: 24px;
}