:root {
            --primary-color: #2563eb;
            --active-nav-bg: #2563eb;
            --active-nav-text: #ffffff;
            --secondary-color: #f1f5f9;
            --text-color: #334155;
            --border-color: #e2e8f0;
            --hover-color: #f8fafc;
            --code-bg: #f8fafc;
            --page-bg: #ffffff;
            --panel-bg: #ffffff;
            --heading-color: #1e293b;
            --subheading-color: #475569;
            --body-color: #475569;
            --muted-color: #64748b;
            --inline-code-color: #e11d48;
            --error-bg: #fef2f2;
            --error-border: #fecaca;
            --error-color: #991b1b;
            --backdrop-color: rgba(15, 23, 42, 0.5);
            --lightbox-bg: rgba(255, 255, 255, 0.97);
        }

        html[data-theme="dark"] {
            color-scheme: dark;
            --primary-color: #60a5fa;
            --active-nav-bg: #1d4ed8;
            --active-nav-text: #ffffff;
            --secondary-color: #111827;
            --text-color: #cbd5e1;
            --border-color: #334155;
            --hover-color: #1e293b;
            --code-bg: #0d1117;
            --page-bg: #0f172a;
            --panel-bg: #1e293b;
            --heading-color: #f1f5f9;
            --subheading-color: #cbd5e1;
            --body-color: #94a3b8;
            --muted-color: #94a3b8;
            --inline-code-color: #f472b6;
            --error-bg: rgba(127, 29, 29, 0.25);
            --error-border: #7f1d1d;
            --error-color: #fca5a5;
            --backdrop-color: rgba(0, 0, 0, 0.6);
            --lightbox-bg: rgba(15, 23, 42, 0.97);
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            line-height: 1.6;
            color: var(--text-color);
            background-color: var(--page-bg);
        }

        .container {
            display: flex;
            min-height: 100vh;
        }

        .sidebar {
            width: 320px;
            background-color: var(--secondary-color);
            border-right: 1px solid var(--border-color);
            padding: 20px;
            overflow-y: auto;
            position: fixed;
            height: 100vh;
            z-index: 200;
        }

        .content {
            flex: 1;
            margin-left: 320px;
            padding: 40px 60px;
            max-width: calc(100% - 320px);
        }

        .content-inner {
            display: grid;
            grid-template-columns: minmax(0, 1fr) 220px;
            gap: 48px;
            align-items: start;
        }

        .content-inner.no-toc {
            grid-template-columns: minmax(0, 1fr);
        }

        .content-inner.no-toc .toc {
            display: none;
        }

        .doc-column {
            min-width: 0;
            max-width: 920px;
        }

        .sidebar-top {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 8px;
            margin-bottom: 15px;
        }

        .logo {
            flex: 1 1 auto;
            min-width: 0;
            font-size: 18px;
            font-weight: bold;
            color: var(--primary-color);
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .header-actions {
            display: flex;
            align-items: center;
            justify-content: flex-start;
            gap: 8px;
            width: 100%;
        }

        .theme-toggle {
            flex-shrink: 0;
            width: 34px;
            height: 34px;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            background: var(--panel-bg);
            font-size: 15px;
            line-height: 1;
            cursor: pointer;
            transition: border-color 0.2s;
        }

        .theme-toggle:hover {
            border-color: var(--primary-color);
        }

        .lang-toggle {
            flex-shrink: 0;
            height: 34px;
            padding: 0 10px;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            background: var(--panel-bg);
            color: var(--text-color);
            font-size: 13px;
            font-weight: 600;
            line-height: 1;
            cursor: pointer;
            transition: border-color 0.2s;
        }

        .lang-toggle:hover {
            border-color: var(--primary-color);
        }

        .lang-fallback-notice {
            margin-bottom: 16px;
            padding: 10px 14px;
            border: 1px solid var(--error-border);
            background: var(--error-bg);
            color: var(--error-color);
            border-radius: 8px;
            font-size: 13.5px;
        }

        .repo-link {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 8px 16px;
            background: var(--panel-bg);
            color: var(--primary-color);
            text-decoration: none;
            border-radius: 8px;
            font-size: 14px;
            font-weight: 500;
            transition: all 0.2s;
            margin-bottom: 20px;
            border: 1px solid var(--border-color);
            width: max-content;
            margin-bottom: 0;
            margin-right: 0;
        }

        .repo-link:hover {
            background: var(--hover-color);
            border-color: var(--primary-color);
        }

        .repo-info {
            margin: 0 0 20px 0;
            padding: 15px;
            background: var(--hover-color);
            border-radius: 8px;
            border: 1px solid var(--border-color);
        }

        .repo-info h4 {
            margin: 0 0 10px 0;
            font-size: 12px;
            color: var(--muted-color);
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }

        .info-row {
            font-size: 11px;
            color: var(--body-color);
            line-height: 1.6;
            margin-bottom: 4px;
        }

        .info-row strong {
            font-weight: 600;
            min-width: 80px;
            display: inline-block;
        }

        .nav-filter {
            width: 100%;
            padding: 8px 12px;
            margin-bottom: 16px;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            font-size: 13px;
            font-family: inherit;
            background: var(--panel-bg);
            color: var(--text-color);
            outline: none;
            transition: border-color 0.2s;
        }

        .nav-filter:focus {
            border-color: var(--primary-color);
        }

        .nav-filter::placeholder {
            color: var(--muted-color);
        }

        .nav-section {
            margin-bottom: 12px;
        }

        .nav-section h3 {
            font-size: 12px;
            font-weight: 600;
            color: var(--muted-color);
            text-transform: uppercase;
            letter-spacing: 0.05em;
            margin-bottom: 8px;
            padding: 8px 12px;
        }

        .nav-item {
            display: block;
            padding: 10px 12px;
            color: var(--text-color);
            text-decoration: none;
            border-radius: 6px;
            font-size: 14px;
            transition: all 0.2s ease;
            margin-bottom: 2px;
            cursor: pointer;
        }

        .nav-item:hover {
            background-color: var(--panel-bg);
            color: var(--primary-color);
        }

        .nav-item.active {
            background-color: var(--active-nav-bg);
            color: var(--active-nav-text);
        }

        .nav-item.nav-parent {
            font-weight: 600;
            font-size: 13px;
            color: var(--muted-color);
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }

        .nav-item.nav-parent.active {
            color: var(--active-nav-text);
        }

        .nav-row {
            display: flex;
            align-items: center;
            gap: 2px;
        }

        .nav-row .nav-item {
            flex: 1;
            min-width: 0;
        }

        .nav-toggle {
            flex-shrink: 0;
            width: 22px;
            height: 22px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: none;
            border: none;
            padding: 0;
            color: var(--muted-color);
            font-size: 11px;
            cursor: pointer;
            transition: transform 0.15s ease;
            transform: rotate(90deg);
        }

        .nav-group.collapsed > .nav-row .nav-toggle {
            transform: none;
        }

        .nav-group.collapsed > .nav-children {
            display: none;
        }

        .nav-children {
            margin-left: 14px;
        }

        .nav-children .nav-item {
            font-size: 13px;
            padding: 8px 12px;
        }

        .nav-children .nav-children .nav-item {
            font-size: 12px;
            padding: 6px 10px;
        }

        .nav-hidden {
            display: none !important;
        }

        #navigation.filtering .nav-group.filter-open > .nav-children {
            display: block;
        }

        .markdown-content {
            max-width: 100%;
            animation: fadeIn 0.3s ease-in;
        }

        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(10px); }
            to { opacity: 1; transform: translateY(0); }
        }

        .markdown-content h1,
        .markdown-content h2,
        .markdown-content h3,
        .markdown-content h4,
        .markdown-content h5,
        .markdown-content h6 {
            scroll-margin-top: 1rem;
        }

        .markdown-content h1 {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--heading-color);
            margin-bottom: 1rem;
            border-bottom: 2px solid var(--border-color);
            padding-bottom: 0.5rem;
        }

        .markdown-content h2 {
            font-size: 2rem;
            font-weight: 600;
            color: var(--text-color);
            margin-top: 2.5rem;
            margin-bottom: 1rem;
            padding-top: 1rem;
            border-top: 1px solid var(--border-color);
        }

        .markdown-content h3 {
            font-size: 1.5rem;
            font-weight: 600;
            color: var(--subheading-color);
            margin-top: 2rem;
            margin-bottom: 0.75rem;
        }

        .markdown-content h4 {
            font-size: 1.25rem;
            font-weight: 600;
            color: var(--subheading-color);
            margin-top: 1.5rem;
            margin-bottom: 0.5rem;
        }

        .markdown-content p {
            margin-bottom: 1rem;
            color: var(--body-color);
        }

        .markdown-content ul, .markdown-content ol {
            margin-bottom: 1rem;
            padding-left: 2rem;
        }

        .markdown-content li {
            margin-bottom: 0.5rem;
            color: var(--body-color);
        }

        .markdown-content code {
            background-color: var(--code-bg);
            padding: 0.2em 0.4em;
            border-radius: 0.25rem;
            font-family: 'Fira Code', 'Consolas', 'Monaco', monospace;
            font-size: 0.9em;
            color: var(--inline-code-color);
        }

        .code-block {
            position: relative;
            margin-bottom: 1.5rem;
        }

        .markdown-content pre {
            background-color: var(--code-bg);
            border: 1px solid var(--border-color);
            border-radius: 0.5rem;
            padding: 1.25rem;
            overflow-x: auto;
            margin-bottom: 1.5rem;
            line-height: 1.5;
        }

        .code-block pre {
            margin-bottom: 0;
        }

        .markdown-content pre code {
            background-color: transparent;
            padding: 0;
            font-size: 0.875rem;
        }

        .copy-btn {
            position: absolute;
            top: 8px;
            right: 8px;
            padding: 4px 10px;
            font-size: 12px;
            font-family: inherit;
            color: var(--muted-color);
            background: var(--panel-bg);
            border: 1px solid var(--border-color);
            border-radius: 6px;
            cursor: pointer;
            opacity: 0;
            transition: opacity 0.15s ease, border-color 0.15s ease;
        }

        .code-block:hover .copy-btn,
        .copy-btn:focus {
            opacity: 1;
        }

        @media (hover: none) {
            .copy-btn {
                opacity: 1;
            }
        }

        .copy-btn:hover {
            border-color: var(--primary-color);
            color: var(--primary-color);
        }

        .copy-btn.copied {
            color: #16a34a;
            border-color: #16a34a;
            opacity: 1;
        }

        .markdown-content blockquote {
            border-left: 4px solid var(--primary-color);
            padding-left: 1rem;
            margin: 1.5rem 0;
            font-style: italic;
            color: var(--muted-color);
            background: var(--hover-color);
            padding: 1rem 1rem 1rem 1.5rem;
            border-radius: 0 0.5rem 0.5rem 0;
        }

        .markdown-content table {
            width: 100%;
            border-collapse: collapse;
            margin-bottom: 1.5rem;
            font-size: 0.9rem;
        }

        .markdown-content th, .markdown-content td {
            border: 1px solid var(--border-color);
            padding: 0.75rem;
            text-align: left;
        }

        .markdown-content th {
            background-color: var(--secondary-color);
            font-weight: 600;
            color: var(--text-color);
        }

        .markdown-content tr:hover {
            background-color: var(--hover-color);
        }

        .markdown-content a {
            color: var(--primary-color);
            text-decoration: none;
            border-bottom: 1px solid transparent;
            transition: border-color 0.2s;
        }

        .markdown-content a:hover {
            border-bottom-color: var(--primary-color);
        }

        .markdown-content img {
            max-width: 100%;
            height: auto;
            border-radius: 0.5rem;
            margin: 1rem 0;
        }

        .mermaid {
            position: relative;
            margin: 2rem 0;
            padding: 1.5rem;
            background: var(--panel-bg);
            border: 1px solid var(--border-color);
            border-radius: 0.5rem;
            overflow-x: auto;
        }

        .mermaid svg {
            max-width: 100%;
            height: auto;
        }

        .mermaid.zoomable svg {
            cursor: zoom-in;
        }

        .mermaid-expand {
            position: absolute;
            top: 8px;
            right: 8px;
            width: 30px;
            height: 30px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 15px;
            line-height: 1;
            color: var(--muted-color);
            background: var(--panel-bg);
            border: 1px solid var(--border-color);
            border-radius: 6px;
            cursor: pointer;
            opacity: 0;
            transition: opacity 0.15s ease, border-color 0.15s ease;
        }

        .mermaid:hover .mermaid-expand,
        .mermaid-expand:focus {
            opacity: 1;
        }

        @media (hover: none) {
            .mermaid-expand {
                opacity: 1;
            }
        }

        .mermaid-expand:hover {
            color: var(--primary-color);
            border-color: var(--primary-color);
        }

        .mermaid-lightbox {
            display: none;
            position: fixed;
            inset: 0;
            z-index: 400;
            background: var(--lightbox-bg);
        }

        .mermaid-lightbox.open {
            display: block;
        }

        .lightbox-canvas {
            position: absolute;
            inset: 0;
            overflow: hidden;
            cursor: grab;
            touch-action: none;
        }

        .lightbox-canvas.dragging {
            cursor: grabbing;
        }

        .lightbox-stage {
            position: absolute;
            top: 0;
            left: 0;
            transform-origin: 0 0;
        }

        .lightbox-toolbar {
            position: absolute;
            top: 16px;
            right: 16px;
            z-index: 2;
            display: flex;
            gap: 8px;
        }

        .lightbox-toolbar button {
            min-width: 38px;
            height: 38px;
            padding: 0 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            font-family: inherit;
            color: var(--text-color);
            background: var(--panel-bg);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            cursor: pointer;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
            transition: border-color 0.15s ease, color 0.15s ease;
        }

        .lightbox-toolbar button:hover {
            color: var(--primary-color);
            border-color: var(--primary-color);
        }

        .lightbox-hint {
            position: absolute;
            bottom: 16px;
            left: 50%;
            transform: translateX(-50%);
            z-index: 2;
            padding: 6px 14px;
            font-size: 12px;
            color: var(--muted-color);
            background: var(--panel-bg);
            border: 1px solid var(--border-color);
            border-radius: 999px;
            pointer-events: none;
        }

        .mermaid-error {
            padding: 1rem;
            background: var(--error-bg);
            border: 1px solid var(--error-border);
            border-radius: 0.5rem;
            color: var(--error-color);
            font-size: 0.875rem;
        }

        .mermaid-error details {
            margin-top: 0.5rem;
        }

        .mermaid-error summary {
            cursor: pointer;
            font-weight: 500;
        }

        .mermaid-error pre {
            margin-top: 0.5rem;
            padding: 0.75rem;
            background: var(--code-bg);
            border-radius: 0.375rem;
            overflow-x: auto;
            color: var(--text-color);
            font-size: 0.8rem;
        }

        .toc {
            position: sticky;
            top: 40px;
            max-height: calc(100vh - 80px);
            overflow-y: auto;
            font-size: 13px;
            padding-bottom: 20px;
        }

        .toc-title {
            font-size: 11px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.05em;
            color: var(--muted-color);
            margin-bottom: 8px;
        }

        .toc-link {
            display: block;
            padding: 4px 0 4px 12px;
            color: var(--muted-color);
            text-decoration: none;
            border-left: 2px solid var(--border-color);
            line-height: 1.4;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        .toc-link.toc-h3 {
            padding-left: 24px;
        }

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

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

        .pager {
            display: flex;
            justify-content: space-between;
            gap: 16px;
            margin-top: 3rem;
            padding-top: 1.5rem;
            border-top: 1px solid var(--border-color);
        }

        .pager:empty {
            display: none;
        }

        .pager-link {
            display: flex;
            flex-direction: column;
            gap: 4px;
            padding: 12px 16px;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            text-decoration: none;
            max-width: 48%;
            transition: border-color 0.2s, background 0.2s;
        }

        .pager-link:hover {
            border-color: var(--primary-color);
            background: var(--hover-color);
        }

        .pager-next {
            margin-left: auto;
            text-align: right;
        }

        .pager-label {
            font-size: 12px;
            color: var(--muted-color);
        }

        .pager-title {
            font-size: 14px;
            font-weight: 500;
            color: var(--primary-color);
        }

        .loading {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            min-height: 400px;
            color: var(--muted-color);
        }

        .loading-spinner {
            width: 50px;
            height: 50px;
            border: 4px solid var(--secondary-color);
            border-top-color: var(--primary-color);
            border-radius: 50%;
            animation: spin 1s linear infinite;
            margin-bottom: 1rem;
        }

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

        .error {
            padding: 2rem;
            background: var(--error-bg);
            border: 1px solid var(--error-border);
            border-radius: 0.5rem;
            color: var(--error-color);
            margin: 2rem 0;
        }

        .error h3 {
            margin-bottom: 0.5rem;
        }

        .menu-toggle {
            display: none;
            position: fixed;
            top: 12px;
            left: 12px;
            z-index: 300;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            background: var(--panel-bg);
            color: var(--text-color);
            font-size: 18px;
            cursor: pointer;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
        }

        .backdrop {
            display: none;
            position: fixed;
            inset: 0;
            background: var(--backdrop-color);
            z-index: 150;
        }

        .backdrop.visible {
            display: block;
        }

        @media (max-width: 1280px) {
            .content-inner {
                grid-template-columns: minmax(0, 1fr);
            }

            .toc {
                display: none;
            }
        }

        @media (max-width: 1024px) {
            .menu-toggle {
                display: flex;
            }

            .sidebar {
                transform: translateX(-100%);
                transition: transform 0.25s ease;
                box-shadow: 0 0 24px rgba(0, 0, 0, 0.2);
            }

            .sidebar.open {
                transform: none;
            }

            .content {
                margin-left: 0;
                padding: 72px 20px 20px;
                max-width: 100%;
            }

            .markdown-content h1,
            .markdown-content h2,
            .markdown-content h3,
            .markdown-content h4,
            .markdown-content h5,
            .markdown-content h6 {
                scroll-margin-top: 64px;
            }
        }