/**
 * 课程单元组件样式
 * 5层原子化架构的标准化展示
 */

.lesson-unit {
    width: 100%;
    max-width: 1000px;
    margin: 0 auto;
}

.lesson-header {
    margin-bottom: 40px;
    padding-bottom: 20px;
    border-bottom: 2px solid var(--ls-border-color);
}

.lesson-title {
    font-size: 2rem;
    margin: 0 0 16px 0;
    color: var(--ls-text-primary);
    font-weight: 800;
}

.lesson-kps {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.lesson-kps strong {
    color: var(--ls-text-secondary);
    font-size: 0.9rem;
}

.kp-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.kp-tag {
    background: var(--ls-primary-light);
    color: var(--ls-primary);
    padding: 4px 12px;
    border-radius: 99px;
    font-size: 0.85rem;
    font-weight: 500;
}

/* 层级通用样式 */
.lesson-layer {
    margin-bottom: 60px;
    padding: 30px;
    background: var(--ls-bg-secondary);
    border-radius: var(--ls-radius-lg);
    border-left: 4px solid var(--ls-primary);
}

.layer-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 24px;
}

.layer-number {
    width: 50px;
    height: 50px;
    background: var(--ls-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 800;
    flex-shrink: 0;
}

.layer-header h3 {
    margin: 0;
    font-size: 1.5rem;
    color: var(--ls-text-primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.layer-header h3 i {
    color: var(--ls-primary);
}

.layer-content {
    color: var(--ls-text-primary);
    line-height: 1.8;
}

/* 第1层：认知启发层 */
.layer-hook {
    background: linear-gradient(135deg, var(--ls-primary-light), transparent);
}

.hook-content {
    font-size: 1.1rem;
    padding: 20px;
    background: var(--ls-bg-primary);
    border-radius: var(--ls-radius-md);
    border-left: 4px solid var(--ls-primary);
}

/* 第2层：直觉语义层 */
.layer-conceptual {
    background: linear-gradient(135deg, var(--ls-secondary), transparent);
}

.conceptual-text {
    margin-bottom: 24px;
    font-size: 1.05rem;
}

.mermaid-container {
    background: var(--ls-bg-primary);
    border-radius: var(--ls-radius-md);
    padding: 24px;
    margin-top: 20px;
    overflow-x: auto;
}

/* 第3层：交互实验室 */
.layer-sandbox {
    background: linear-gradient(135deg, var(--ls-accent), transparent);
}

.rrm-read,
.rrm-modify {
    margin-bottom: 24px;
}

.rrm-read h4,
.rrm-modify h4 {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
    color: var(--ls-text-primary);
    font-size: 1.1rem;
}

.rrm-read pre {
    background: var(--ls-bg-primary);
    padding: 16px;
    border-radius: var(--ls-radius-md);
    overflow-x: auto;
    border: 1px solid var(--ls-border-color);
}

.rrm-modify p {
    background: var(--ls-bg-primary);
    padding: 16px;
    border-radius: var(--ls-radius-md);
    border-left: 4px solid var(--ls-accent);
    margin: 0;
}

.rrm-run {
    margin: 24px 0;
}

/* 第4层：深度推演层 */
.layer-deepdive {
    background: linear-gradient(135deg, var(--ls-primary-light), var(--ls-secondary));
}

.deepdive-content {
    font-size: 1.05rem;
}

.deepdive-content blockquote {
    border-left: 4px solid var(--ls-primary);
    padding: 16px 20px;
    margin: 20px 0;
    background: var(--ls-bg-primary);
    border-radius: var(--ls-radius-md);
    font-style: italic;
}

.deepdive-content code {
    background: var(--ls-bg-primary);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'Fira Code', monospace;
    font-size: 0.9em;
}

/* 第5层：自动化评测层 */
.layer-assessment {
    background: linear-gradient(135deg, var(--ls-secondary), var(--ls-primary-light));
}

/* 响应式设计 */
@media (max-width: 768px) {
    .lesson-layer {
        padding: 20px;
    }

    .layer-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }

    .layer-number {
        width: 40px;
        height: 40px;
        font-size: 1.2rem;
    }

    .layer-header h3 {
        font-size: 1.2rem;
    }

    .lesson-title {
        font-size: 1.5rem;
    }
}