body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
            color: #334155;
            background-color: #f8fafc;
            line-height: 1.6;
        }

        .container {
            max-width: 1100px;
            margin: 70px auto;
            padding: 40px 20px;
            display: grid;
            grid-template-columns: 280px 1fr;
            gap: 40px;
        }

        /* Sidebar Navigation */
        .sidebar {
            position: sticky;
            top: 110px;
            height: fit-content;
            background: #ffffff;
            padding: 24px;
            border-radius: 8px;
            border: 1px solid #e2e8f0;
        }

        .sidebar h3 {
            font-size: 0.85rem;
            text-transform: uppercase;
            letter-spacing: 0.05em;
            color: #64748b;
            margin-bottom: 16px;
        }

        .sidebar ul {
            list-style: none;
        }

        .sidebar li {
            margin-bottom: 12px;
        }

        .sidebar a {
            color: #334155;
            text-decoration: none;
            font-size: 0.95rem;
            transition: color 0.2s ease;
        }

        .sidebar a:hover {
            color: #1e3a8a;
            font-weight: 500;
        }

        /* Main Content Card */
        .content-card {
            background: #ffffff;
            padding: 48px;
            border-radius: 8px;
            border: 1px solid #e2e8f0;
            box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
        }

        header {
            margin-bottom: 32px;
            border-bottom: 2px solid #e2e8f0;
            padding-bottom: 20px;
        }

        h1 {
            color: #0f172a;
            font-size: 2.25rem;
            margin-bottom: 8px;
        }

        .meta-date {
            color: #64748b;
            font-size: 0.95rem;
        }

        section {
            margin-bottom: 32px;
            scroll-margin-top: 110px;
        }

        h2 {
            color: #0f172a;
            font-size: 1.4rem;
            margin-bottom: 16px;
            padding-bottom: 8px;
        }

        h3 {
            color: #0f172a;
            font-size: 1.1rem;
            margin: 16px 0 8px 0;
        }

        p {
            margin-bottom: 16px;
        }

        ul {
            margin-bottom: 16px;
            padding-left: 24px;
        }

        li {
            margin-bottom: 6px;
        }

        /* Responsive adjustments for smaller screens */
        @media (max-width: 768px) {
            .container {
                grid-template-columns: 1fr;
                padding: 20px 16px;
            }

            .sidebar {
                display: none;
                /* Hides table of contents on mobile for space saving */
            }

            .content-card {
                padding: 24px;
            }

            h1 {
                font-size: 1.8rem;
            }
        }