/* 
 * 文档中心专用样式 (Docs CSS)
 * 继承主站风格并适配文档阅读体验
 */

:root {
    --sidebar-width: 280px;
    --toc-width: 240px;
    --header-height: 72px; /* Match style.css navbar height */
    --doc-content-max-width: 900px;
}

body {
    background-color: var(--color-bg-primary);
    color: var(--color-text-primary);
    /* Font family inherited from global style.css via HTML link */
}

/* 
 * 复写/适配导航栏 (Navbar Override/Adaptation)
 * 文档中心可能需要特定的导航栏微调，或者直接使用 style.css 的
 * 这里我们主要确保它固定在顶部且层级正确
 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    border-bottom: 1px solid var(--color-border);
    /* Background and backdrop-filter are handled in style.css */
}

/* 
 * 布局容器 (Layout Container)
 * 采用 CSS Grid 实现三栏布局
 */
.docs-container {
    display: grid;
    grid-template-columns: var(--sidebar-width) 1fr var(--toc-width);
    padding-top: var(--header-height);
    min-height: 100vh;
    max-width: 1600px; /* Wider for docs to accommodate 3 cols */
    margin: 0 auto;
}

/* 
 * 左侧侧边栏 (Sidebar)
 */
.sidebar {
    position: sticky;
    top: var(--header-height);
    height: calc(100vh - var(--header-height));
    overflow-y: auto;
    border-right: 1px solid var(--color-border);
    padding: 2rem 1.5rem;
    background-color: var(--color-bg-secondary); /* Light gray background for sidebar */
}

/* 侧边栏滚动条美化 */
.sidebar::-webkit-scrollbar {
    width: 6px;
}
.sidebar::-webkit-scrollbar-thumb {
    background-color: rgba(0,0,0,0.1);
    border-radius: 3px;
}

.search-box input {
    padding: 8px 12px 8px 36px;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    background-color: var(--color-bg-secondary);
    font-size: 0.9rem;
    width: 240px;
    transition: all 0.2s;
}

.sidebar-group {
    margin-bottom: 2rem;
}

.sidebar-title {
    font-size: 0.8rem;
    text-transform: uppercase;
    color: var(--color-text-secondary);
    font-weight: 700;
    margin-bottom: 1rem;
    letter-spacing: 0.05em;
    padding-left: 12px;
}

.sidebar-link {
    display: block;
    padding: 8px 12px;
    color: var(--color-text-primary);
    font-size: 0.95rem;
    text-decoration: none;
    transition: var(--transition-standard);
    border-radius: var(--radius-sm);
    margin-bottom: 2px;
}

.sidebar-link:hover {
    color: var(--color-accent);
    background-color: rgba(0, 86, 210, 0.05);
}

.sidebar-link.active {
    color: var(--color-accent);
    font-weight: 600;
    background-color: rgba(0, 86, 210, 0.08);
}

/* 
 * 中间内容区 (Main Content)
 */
.content {
    padding: 3rem 4rem;
    min-width: 0; /* Prevent grid blowout */
    background-color: var(--color-bg-primary);
}

.breadcrumb {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.page-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    color: var(--color-text-primary);
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.page-desc {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: 3rem;
    max-width: 800px;
}

/* 
 * 旅程地图 (Journey Map)
 * 重新设计为卡片风格
 */
.journey-map-section {
    margin-bottom: 4rem;
    padding: 2.5rem;
    background-color: var(--color-bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
}

.journey-map-section h2 {
    margin-bottom: 2rem;
    font-size: 1.5rem;
    color: var(--color-text-primary);
    font-weight: 700;
}

.journey-container {
    display: flex;
    align-items: stretch;
    justify-content: space-between;
    gap: 1rem;
}

.journey-step {
    flex: 1;
    background-color: #FFFFFF;
    padding: 2rem 1.5rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    text-align: center;
    transition: var(--transition-standard);
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    box-shadow: var(--shadow-sm);
}

.journey-step:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-card-hover);
    border-color: var(--color-accent);
}

.step-icon {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    height: 60px;
    width: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-bg-secondary);
    border-radius: 50%;
}

.journey-step h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--color-text-primary);
}

.journey-step p {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.5;
    flex-grow: 1;
}

.step-link {
    font-size: 0.9rem;
    color: var(--color-accent);
    font-weight: 600;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    background-color: rgba(0, 86, 210, 0.05);
    transition: var(--transition-standard);
}

.step-link:hover {
    background-color: var(--color-accent);
    color: #FFFFFF;
}

.journey-connector {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    position: relative;
}

.journey-connector::before {
    content: '';
    width: 100%;
    height: 2px;
    background-color: var(--color-border);
}

.journey-connector::after {
    content: '';
    position: absolute;
    right: 0;
    width: 8px;
    height: 8px;
    border-top: 2px solid var(--color-border);
    border-right: 2px solid var(--color-border);
    transform: rotate(45deg);
}

/* 
 * 代码示例 (Code Examples)
 */
.example-section {
    margin-bottom: 4rem;
}

.code-example {
    margin-bottom: 3rem;
    background-color: #FFFFFF;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-card);
}

.code-example h3 {
    font-size: 1.1rem;
    padding: 1rem 1.5rem;
    background-color: var(--color-bg-secondary);
    border-bottom: 1px solid var(--color-border);
    color: var(--color-text-primary);
    font-weight: 600;
}

.code-example p {
    padding: 1rem 1.5rem 0;
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

pre {
    background-color: #1E1E1E; /* Keep dark theme for code */
    color: #D4D4D4;
    padding: 1.5rem;
    margin: 1.5rem;
    border-radius: var(--radius-md);
    overflow-x: auto;
    font-family: 'SF Mono', 'Menlo', 'Monaco', 'Courier New', monospace;
    font-size: 0.9rem;
    line-height: 1.6;
}

/* 
 * 右侧大纲 (Table of Contents)
 */
.toc {
    position: sticky;
    top: var(--header-height);
    height: calc(100vh - var(--header-height));
    padding: 3rem 1.5rem;
    border-left: 1px solid var(--color-border);
    background-color: var(--color-bg-primary);
}

.toc-title {
    font-size: 0.75rem;
    text-transform: uppercase;
    color: var(--color-text-primary);
    margin-bottom: 1rem;
    font-weight: 700;
    letter-spacing: 0.05em;
}

.toc-link {
    display: block;
    padding: 6px 0 6px 12px;
    color: var(--color-text-secondary);
    font-size: 0.85rem;
    text-decoration: none;
    border-left: 2px solid transparent;
    transition: var(--transition-standard);
}

.toc-link:hover {
    color: var(--color-accent);
}

.toc-link.active {
    color: var(--color-accent);
    border-left-color: var(--color-accent);
    font-weight: 500;
}

/* 
 * 响应式适配 (Responsive)
 */
@media (max-width: 1200px) {
    .docs-container {
        grid-template-columns: 240px 1fr 200px;
    }
}

@media (max-width: 1024px) {
    .docs-container {
        grid-template-columns: 240px 1fr;
    }
    .toc {
        display: none;
    }
}

@media (max-width: 768px) {
    .docs-container {
        display: block;
    }
    .sidebar {
        display: none; /* Mobile handling required (e.g., hamburger) */
    }
    .content {
        padding: 2rem 1.5rem;
    }
    .journey-container {
        flex-direction: column;
        gap: 2rem;
    }
    .journey-connector {
        display: none;
    }
}