/**
 * 统一打印样式
 * 适用于所有试卷和练习页面
 */

@media print {
    /* 隐藏整个页面,只显示试卷内容 */
    body > *:not(#examResult):not(script):not(style) {
        display: none !important;
    }

    /* 隐藏不需要打印的元素 */
    .no-print,
    .header,
    header,
    .nav,
    .nav-tabs,
    .sprint-nav-tabs,
    .sprint-tab-card,
    button,
    .btn,
    input[type="button"],
    input[type="submit"],
    .training-modes,
    .mode-card,
    .difficulty-selector,
    .question-count,
    .time-display,
    .hint-section,
    .pagination-controls,
    .back-button,
    .print-button,
    #printOptionsDialog,
    .bg-animation,
    .hero-section,
    .features-section,
    .stats-section,
    .system-container > div:not(#examResult),
    #sprint-exam-plan > div:not(#examResult),
    #sprint-mock-exam > div:not(#examResult) {
        display: none !important;
    }

    /* 确保试卷内容可见 */
    #examResult,
    #examQuestionsContainer,
    .exam-container,
    .questions-area {
        display: block !important;
        visibility: visible !important;
        position: static !important;
        margin: 0 !important;
        padding: 0 !important;
    }

    /* 页面设置 - A4纸格式 */
    @page {
        size: A4 portrait;
        margin: 1.5cm 1.8cm;
    }

    /* 控制分页 - 确保试卷大约4页 */
    @page:first {
        margin-top: 1.2cm;
    }

    /* 重置背景 */
    * {
        background: white !important;
        color: black !important;
    }

    body {
        background: white !important;
        color: black !important;
        padding: 0 !important;
        margin: 0 !important;
        font-size: 12pt !important;
        line-height: 1.5 !important;
    }

    /* 容器样式 */
    .container,
    .content,
    .system-container,
    #examResult,
    #examQuestionsContainer {
        max-width: 100% !important;
        width: 100% !important;
        margin: 0 !important;
        padding: 10px !important;
        box-shadow: none !important;
        border-radius: 0 !important;
        background: white !important;
        border: none !important;
    }
    
    /* 标题样式 */
    h1, h2, h3, h4, h5, h6 {
        color: black !important;
        page-break-after: avoid;
        background: white !important;
    }

    /* 所有div和span */
    div, span, p, label {
        background: white !important;
        color: black !important;
    }

    /* 题目样式 */
    .question-card,
    .problem-card,
    .question-item,
    [id^="question_"] {
        page-break-inside: avoid;
        border: 1px solid #ccc !important;
        padding: 15px !important;
        margin-bottom: 20px !important;
        background: white !important;
        box-shadow: none !important;
        display: block !important;
        visibility: visible !important;
    }

    /* 避免题目中间分页 */
    .avoid-break {
        page-break-inside: avoid !important;
    }

    /* 题目编号 */
    .question-number,
    .problem-number {
        font-weight: bold;
        font-size: 11pt;
        margin-bottom: 10px;
        color: black !important;
    }

    /* 题目内容 */
    .question-content,
    .problem-text,
    .question-text {
        line-height: 1.8;
        margin: 10px 0;
        font-size: 11pt;
        color: black !important;
        background: white !important;
    }

    /* 选项样式 */
    .options {
        margin: 8px 0;
    }

    .option {
        margin: 4px 0;
        padding: 3px;
        font-size: 0.9em;
    }

    /* 答题区域 */
    .answer-area,
    textarea {
        border: 1px solid #ddd !important;
        background: white !important;
        min-height: 60px;
        padding: 8px;
        margin: 8px 0;
        font-size: 0.9em;
    }

    /* 隐藏答案（用于练习打印） */
    .answer-hidden {
        display: none !important;
    }

    /* 显示答案（用于答案打印） */
    .answer-visible {
        display: block !important;
        border-top: 1px dashed #999;
        padding-top: 8px;
        margin-top: 8px;
        color: #333;
        font-size: 0.9em;
        background: #f9f9f9 !important;
    }

    /* 答案区域打印样式 */
    .answer-section {
        page-break-inside: avoid;
        font-size: 0.9em;
        line-height: 1.5;
    }

    /* 解析区域打印样式 */
    .explanation-section {
        page-break-inside: avoid;
        font-size: 0.85em;
        line-height: 1.5;
    }

    /* 输入框打印样式 */
    input[type="text"],
    input[type="radio"] {
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
    }

    /* 单选按钮打印样式 */
    input[type="radio"] {
        width: 12px;
        height: 12px;
        margin-right: 6px;
    }

    /* 文本输入框打印样式 */
    input[type="text"] {
        border-bottom: 1px solid #333 !important;
        min-width: 100px;
    }
    
    /* 分页控制 */
    .page-break {
        page-break-after: always;
    }
    
    /* 避免在题目中间分页 */
    .avoid-break {
        page-break-inside: avoid;
    }
    
    /* 打印头部信息 */
    .print-header {
        display: block !important;
        text-align: center;
        margin-bottom: 30px;
        padding-bottom: 15px;
        border-bottom: 2px solid #333;
    }
    
    .print-header h1 {
        font-size: 24px;
        margin-bottom: 10px;
    }
    
    .print-info {
        display: flex;
        justify-content: space-between;
        font-size: 12px;
        color: #666;
        margin-top: 10px;
    }
    
    /* 打印页脚 */
    .print-footer {
        display: block !important;
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        text-align: center;
        font-size: 10px;
        color: #999;
        padding: 10px 0;
        border-top: 1px solid #ddd;
    }
    
    /* 确保图片适应页面 */
    img {
        max-width: 100% !important;
        height: auto !important;
        page-break-inside: avoid;
    }
    
    /* 表格样式 */
    table {
        width: 100%;
        border-collapse: collapse;
        page-break-inside: avoid;
    }
    
    table, th, td {
        border: 1px solid #ddd;
        padding: 8px;
    }
    
    /* 链接样式 */
    a {
        color: black !important;
        text-decoration: none !important;
    }
    
    /* 强制显示某些元素 */
    .print-only {
        display: block !important;
    }
}

/* 非打印模式下隐藏打印专用元素 */
@media screen {
    .print-only,
    .print-header,
    .print-footer {
        display: none !important;
    }
}

/* 打印按钮样式（屏幕显示） */
.print-button {
    position: fixed;
    bottom: 30px;
    right: 30px;
    padding: 15px 30px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 50px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    box-shadow: 0 5px 20px rgba(102, 126, 234, 0.4);
    transition: all 0.3s ease;
    z-index: 1000;
}

.print-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.5);
}

.print-button i {
    margin-right: 8px;
}

/* 打印预览模式 */
.print-preview-mode {
    background: #f5f5f5;
    padding: 20px;
}

.print-preview-mode .container {
    background: white;
    box-shadow: 0 0 20px rgba(0,0,0,0.1);
    max-width: 21cm;
    margin: 0 auto;
    padding: 2cm 1.5cm;
}