/* --- CSS Reset & Variables --- */
        :root {
            --primary-color: #0f172a; /* Dark Slate */
            --accent-color: #2563eb; /* Royal Blue */
            --accent-light: #eff6ff;
            --text-color: #334155;
            --text-light: #64748b;
            --bg-color: #f8fafc;
            --white: #ffffff;
            --border-color: #e2e8f0;
            --container-width: 850px;
            --radius: 8px;
            --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'Inter', sans-serif;
            background-color: var(--bg-color);
            color: var(--text-color);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

        /* --- Layout --- */
        .page-wrapper {
            max-width: var(--container-width);
            margin: 40px auto;
            background: var(--white);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            overflow: hidden;
        }

        .content-container {
            padding: 40px 60px;
        }

        @media (max-width: 768px) {
            .content-container {
                padding: 24px;
            }
            .page-wrapper {
                margin: 0;
                border-radius: 0;
            }
        }

        /* --- Header & Logo --- */
        .header {
            text-align: center;
            padding: 40px 0;
            border-bottom: 1px solid var(--border-color);
        }

        .logo {
            display: inline-block;
            margin-bottom: 20px;
        }

        h1 {
            font-family: 'Merriweather', serif;
            color: var(--primary-color);
            font-size: 2.2rem;
            margin-bottom: 10px;
            font-weight: 700;
        }

        .last-updated {
            color: var(--text-light);
            font-size: 0.9rem;
            font-weight: 500;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        /* --- Typography --- */
        h2 {
            font-family: 'Inter', sans-serif;
            color: var(--primary-color);
            font-size: 1.5rem;
            margin-top: 3rem;
            margin-bottom: 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--bg-color);
            font-weight: 700;
        }

        h3 {
            font-family: 'Inter', sans-serif;
            color: var(--primary-color);
            font-size: 1.25rem;
            margin-top: 2rem;
            margin-bottom: 1rem;
            font-weight: 600;
        }

        p {
            margin-bottom: 1.5rem;
        }

        a {
            color: var(--accent-color);
            text-decoration: none;
            transition: color 0.2s;
        }

        a:hover {
            text-decoration: underline;
            color: #1d4ed8;
        }

        ul, ol {
            margin-bottom: 1.5rem;
            padding-left: 1.5rem;
        }

        li {
            margin-bottom: 0.75rem;
        }

        strong, b {
            color: var(--primary-color);
            font-weight: 600;
        }

        /* --- Components --- */
        /* Callout Box (In Short) */
        .callout {
            background-color: var(--accent-light);
            border-left: 4px solid var(--accent-color);
            padding: 1rem 1.5rem;
            border-radius: 4px;
            margin-bottom: 1.5rem;
            font-style: italic;
        }

        .callout strong {
            font-style: normal;
            color: var(--accent-color);
        }

        /* Table of Contents */
        .toc-card {
            background-color: #f1f5f9;
            padding: 24px;
            border-radius: var(--radius);
            margin-bottom: 40px;
            border: 1px solid var(--border-color);
        }

        .toc-title {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--primary-color);
            margin-bottom: 16px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .toc-list {
            list-style: none;
            padding: 0;
            margin: 0;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
        }

        .toc-list li {
            margin-bottom: 0;
        }

        .toc-list a {
            color: var(--text-color);
            font-size: 0.95rem;
            display: block;
            padding: 6px 12px;
            border-radius: 4px;
            transition: background 0.2s, color 0.2s;
        }

        .toc-list a:hover {
            background-color: rgba(255,255,255,0.6);
            color: var(--accent-color);
            text-decoration: none;
        }

        @media (max-width: 600px) {
            .toc-list {
                grid-template-columns: 1fr;
            }
        }

        /* Contact Block */
        .contact-block {
            background-color: var(--primary-color);
            color: var(--white);
            padding: 2rem;
            border-radius: var(--radius);
            margin-top: 3rem;
        }

        .contact-block h3 {
            color: var(--white);
            margin-top: 0;
        }

        .contact-block p {
            color: #cbd5e1;
            margin-bottom: 0.5rem;
        }

        .contact-block a {
            color: var(--white);
            text-decoration: underline;
        }

        /* Footer */
        .footer {
            margin-top: 40px;
            padding-top: 20px;
            border-top: 1px solid var(--border-color);
            text-align: center;
            font-size: 0.85rem;
            color: var(--text-light);
        }

        /* Scroll to Top */
        .scroll-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            background: var(--accent-color);
            color: white;
            width: 45px;
            height: 45px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
            cursor: pointer;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
            z-index: 100;
            border: none;
            font-size: 20px;
        }

        .scroll-top.visible {
            opacity: 1;
            visibility: visible;
        }

        .scroll-top:hover {
            background: #1d4ed8;
            transform: translateY(-2px);
        }

        /* Print Styles */
        @media print {
            body { background: white; color: black; }
            .page-wrapper { box-shadow: none; margin: 0; max-width: 100%; border-radius: 0; }
            .header { padding: 20px 0; }
            .content-container { padding: 0; }
            .toc-card { display: none; } /* Usually we don't print TOC */
            .scroll-top { display: none; }
            a { text-decoration: underline; color: black; }
            h2, h3 { page-break-after: avoid; }
        }