/**
 * 板书区卡片样式
 * 用于展示模块化的板书内容
 */

/* 基础板书卡片 */
.board-card {
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    border-left: 4px solid #3b82f6;
    border-radius: 12px;
    padding: 16px;
    margin: 16px 0;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    animation: cardSlideIn 0.4s ease;
    max-width: 100%;
    overflow-y: visible;
    scroll-margin-top: 20px;  /* 滚动定位时与进度条之间的呼吸空间 */
}

/* 解题步骤卡片固定宽度（不包括题目信息、答案、总结等特殊卡片） */
.message.ai:has(.board-card:not(.question-info-card):not(.answer-card):not(.summary-card):not(.recommendations-card)) {
    width: 100%;
}

.board-card:not(.question-info-card):not(.answer-card):not(.summary-card):not(.recommendations-card) {
    width: 100%;
}

@keyframes cardSlideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* 卡片内的深入学习按钮区域 */
.board-card-actions {
    margin-top: 16px;
    padding-top: 12px;
    border-top: 1px dashed #e0f2fe;
    display: flex;
    justify-content: center;
}

/* 深入学习内容容器 */
.deep-learn-container {
    display: flex;
    flex-direction: column;
    gap: 12px; /* 气泡之间的间隔 */
}

.deep-learn-toggle-btn {
    background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
    color: white;
    border: none;
    border-radius: 8px;
    padding: 10px 24px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(59, 130, 246, 0.3);
}

.deep-learn-toggle-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.4);
}

.deep-learn-toggle-btn:active {
    transform: translateY(0);
}

.deep-learn-toggle-btn.active {
    background: linear-gradient(135deg, #64748b 0%, #475569 100%);
}

.board-card-title {
    font-size: 16px;
    font-weight: 600;
    color: #1e40af;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.board-card-content {
    font-size: 14px;
    line-height: 1.8;
    color: #1f2937;
    overflow-x: auto;
    overflow-y: visible !important;
    max-height: none !important;
    height: auto;
}

/* 板书内容格式化 */
.board-card-content ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.board-card-content li {
    padding: 6px 0 6px 20px;
    position: relative;
}

.board-card-content li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: #3b82f6;
    font-weight: bold;
}

/* 确保列表项中的MathJax公式为行内显示 */
.board-card-content li .MJX-TEX,
.board-card-content li mjx-container {
    display: inline !important;
    margin: 0 !important;
}

/* 题目信息卡片（特殊样式） */
.question-info-card {
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
    border-left: 4px solid #f59e0b;
    margin-bottom: 20px;
}

.question-info-card .board-card-title {
    color: #92400e;
}

.question-info-card .board-card-content {
    color: #78350f;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.question-info-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
}

.question-info-item strong {
    min-width: 80px;
}

/* 多问步骤缩进（与内容左对齐） */
.question-info-item.indented {
    padding-left: 88px; /* 80px(strong宽度) + 8px(gap) */
}

/* 难度星级 */
.difficulty-stars {
    color: #f59e0b;
    letter-spacing: 2px;
}

/* 答案模块卡片（特殊样式） */
.answer-card {
    background: linear-gradient(135deg, #d1fae5 0%, #a7f3d0 100%);
    border-left: 4px solid #10b981;
}

.answer-card .board-card-title {
    color: #065f46;
}

.answer-card .board-card-content {
    color: #064e3b;
}

/* 答案锁定状态 */
.answer-locked {
    background: linear-gradient(135deg, #fafafa 0%, #f5f5f5 100%);
    border-left: 4px solid #9ca3af;
}

.answer-locked-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 24px 20px;
    text-align: center;
}

.answer-lock-icon {
    font-size: 36px;
    margin-bottom: 12px;
    opacity: 0.6;
}

.answer-lock-text {
    font-size: 15px;
    color: #6b7280;
    margin-bottom: 16px;
    line-height: 1.6;
    white-space: nowrap;
}

.unlock-answer-btn {
    background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
    color: white;
    border: none;
    border-radius: 8px;
    padding: 12px 32px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(59, 130, 246, 0.3);
}

.unlock-answer-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.4);
}

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

/* 总结卡片（特殊样式） */
.summary-card {
    background: linear-gradient(135deg, #fce7f3 0%, #fbcfe8 100%);
    border-left: 4px solid #ec4899;
}

.summary-card .board-card-title {
    color: #9f1239;
}

.summary-card .board-card-content {
    color: #831843;
}

/* 推荐卡片（特殊样式） */
.recommendations-card {
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
    border-left: 4px solid #f59e0b;
}

.recommendations-card .board-card-title {
    color: #92400e;
}

.recommendations-card .board-card-content {
    color: #78350f;
    line-height: 1.8;
}

/* 推荐卡片内的加粗标题 */
.recommendations-card .board-card-content strong {
    color: #92400e;
    font-size: 15px;
    display: block;
    margin-top: 8px;
    margin-bottom: 4px;
}

.recommendations-card .board-card-content strong:first-child {
    margin-top: 0;
}

/* 板书内容中的数学公式 */
.board-card-content mjx-container {
    margin: 4px 0;
    max-width: 100%;
}

/* 自定义滚动条样式（板书卡片内 - 仅横向） */
.board-card-content::-webkit-scrollbar {
    height: 6px;
    width: 0px; /* 隐藏纵向滚动条 */
}

.board-card-content::-webkit-scrollbar-thumb {
    background: rgba(59, 130, 246, 0.3);
    border-radius: 3px;
}

.board-card-content::-webkit-scrollbar-thumb:hover {
    background: rgba(59, 130, 246, 0.5);
}

.board-card-content::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.05);
    border-radius: 3px;
}

/* 板书内容中的强调文字 */
.board-card-content strong {
    color: #1e40af;
    font-weight: 600;
}

/* 板书内容中的代码或公式 */
.board-card-content code {
    background: rgba(0, 0, 0, 0.05);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: "Courier New", monospace;
    font-size: 13px;
}

/* 卡点标记（用于总结中） */
.stuck-indicator {
    display: inline-block;
    background: #fef2f2;
    color: #dc2626;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 12px;
    margin-left: 8px;
}

/* 响应式调整 */
@media (max-width: 375px) {
    .board-card {
        padding: 14px;
        margin: 12px 0;
    }
    
    .board-card-title {
        font-size: 15px;
    }
    
    .board-card-content {
        font-size: 13px;
    }
}