:root {
            --primary-color: #f2711c;
            --text-main: #333333;
            --text-muted: #666666;
            --bg-body: #ffffff;
            --bg-sidebar: #f9f9f9;
            --border-color: #e0e0e0;
            --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
        }

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

        body {
            font-family: var(--font-family);
            line-height: 1.6;
            color: var(--text-main);
            background-color: var(--bg-body);
        }

        /* Header Styles */
        .site-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0.75rem 1.5rem;
            border-bottom: 1px solid var(--border-color);
            position: sticky;
            top: 0;
            background: white;
            z-index: 1000;
        }

        .logo-area {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.25rem;
            text-decoration: none;
            color: var(--text-main);
        }

        .logo-icon {
            background: var(--primary-color);
            color: white;
            width: 32px;
            height: 32px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 4px;
            font-size: 1.1rem;
        }

        .nav-links {
            display: flex;
            gap: 20px;
            font-size: 0.9rem;
        }

        .nav-links a {
            text-decoration: none;
            color: var(--text-muted);
            transition: color 0.2s;
        }

        .nav-links a:hover {
            color: var(--primary-color);
        }

        /* Layout */
        .container {
            display: grid;
            grid-template-columns: 280px 1fr;
            max-width: 1400px;
            margin: 0 auto;
            min-height: calc(100vh - 60px);
        }

        /* Sidebar Navigation */
        .sidebar {
            background: var(--bg-sidebar);
            border-right: 1px solid var(--border-color);
            padding: 2rem 1.5rem;
            overflow-y: auto;
            max-height: calc(100vh - 60px);
            position: sticky;
            top: 60px;
        }

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

        .sidebar-nav ul {
            list-style: none;
        }

        .sidebar-nav li {
            margin-bottom: 0.5rem;
        }

        .sidebar-nav a {
            text-decoration: none;
            color: var(--text-muted);
            font-size: 0.9rem;
            display: block;
            padding: 4px 0;
            transition: color 0.2s;
        }

        .sidebar-nav a:hover {
            color: var(--primary-color);
        }

        .sidebar-nav a.active {
            color: var(--primary-color);
            font-weight: 600;
        }

        /* Main Content */
        .main-content {
            padding: 2.5rem 4rem;
            max-width: 900px;
        }

        .breadcrumb {
            display: flex;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 1rem;
        }

        .breadcrumb a {
            color: inherit;
            text-decoration: none;
        }

        h1 {
            font-size: 2.5rem;
            margin-bottom: 1.5rem;
            color: #000;
        }

        h2 {
            font-size: 1.5rem;
            margin-top: 2.5rem;
            margin-bottom: 1rem;
            border-bottom: 1px solid var(--border-color);
            padding-bottom: 0.5rem;
            scroll-margin-top: 80px; /* Offset for sticky header */
        }

        p {
            margin-bottom: 1.25rem;
            font-size: 1.05rem;
        }

        .alert {
            background: #fff8f1;
            border-left: 4px solid var(--primary-color);
            padding: 1rem 1.5rem;
            margin: 2rem 0;
            border-radius: 0 4px 4px 0;
        }

        /* List Styling */
        ul.steps {
            margin-left: 1.5rem;
            margin-bottom: 1.5rem;
        }

        ul.steps li {
            margin-bottom: 0.75rem;
        }

        code {
            background: #f1f1f1;
            padding: 0.2rem 0.4rem;
            border-radius: 3px;
            font-family: monospace;
            font-size: 0.9em;
        }

        /* Responsive Images */
        .img-container {
            margin: 2rem 0;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            overflow: hidden;
            background: #fff;
            box-shadow: 0 4px 12px rgba(0,0,0,0.05);
        }

        .img-container img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        /* Responsive Tables */
        .table-wrapper {
            overflow-x: auto;
            margin: 2rem 0;
        }

        table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.95rem;
        }

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

        th {
            background: var(--bg-sidebar);
            font-weight: 600;
        }

        /* Footer */
        .site-footer {
            background: #fff;
            border-top: 1px solid var(--border-color);
            padding: 4rem 2rem;
            margin-top: 4rem;
        }

        .footer-grid {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 2rem;
        }

        .footer-col h4 {
            margin-bottom: 1.5rem;
            font-size: 0.9rem;
        }

        .footer-col ul {
            list-style: none;
        }

        .footer-col li {
            margin-bottom: 0.75rem;
        }

        .footer-col a {
            text-decoration: none;
            color: var(--text-muted);
            font-size: 0.9rem;
        }

        .footer-bottom {
            text-align: center;
            margin-top: 4rem;
            padding-top: 2rem;
            border-top: 1px solid var(--border-color);
            color: var(--text-muted);
            font-size: 0.85rem;
        }

        /* Mobile Menu */
        .menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            cursor: pointer;
        }

        /* Responsive Breakpoints */
        @media (max-width: 1024px) {
            .container {
                grid-template-columns: 240px 1fr;
            }
            .main-content {
                padding: 2rem;
            }
        }

        @media (max-width: 768px) {
            .container {
                grid-template-columns: 1fr;
            }
            .sidebar {
                display: none;
            }
            .sidebar.open {
                display: block;
                position: fixed;
                top: 60px;
                left: 0;
                right: 0;
                bottom: 0;
                z-index: 999;
                background: white;
            }
            .menu-toggle {
                display: block;
            }
            .nav-links {
                display: none;
            }
            .main-content {
                padding: 1.5rem;
            }
            h1 {
                font-size: 1.8rem;
            }
        }