/* CSS Variables for Business Color Scheme & Typography */
        :root {
            /* Colors: Professional Slate, White, and Corporate Blue */
            --bg-color: #ffffff;
            --bg-alt: #f8fafc;
            --text-main: #0f172a;
            --text-muted: #475569;
            --primary-color: #1e293b;
            --accent-color: #2563eb;
            --accent-hover: #1d4ed8;
            --border-color: #e2e8f0;
            
            /* Typography: System Fonts for native feel and performance */
            --font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            --font-serif: ui-serif, Georgia, Cambria, "Times New Roman", Times, serif;
            --line-height-body: 1.7;
            --line-height-heading: 1.2;
            
            /* Layout */
            --max-width: 1200px;
            --content-width: 720px; /* Optimal reading width (roughly 65-75 characters) */
            --spacing-sm: 0.5rem;
            --spacing-md: 1rem;
            --spacing-lg: 2rem;
            --spacing-xl: 4rem;
        }

        /* CSS Reset & Base Styles */
        *, *::before, *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        body {
            font-family: var(--font-family);
            background-color: var(--bg-color);
            color: var(--text-main);
            line-height: var(--line-height-body);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

        a:hover {
            color: var(--accent-hover);
            text-decoration: underline;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 4px;
        }

        /* Reading Progress Bar */
        #progress-container {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background-color: transparent;
            z-index: 1000;
        }
        #progress-bar {
            height: 100%;
            background-color: var(--accent-color);
            width: 0%;
            transition: width 0.1s ease-out;
        }

        /* Header Navigation */
        .site-header {
            background-color: var(--bg-color);
            border-bottom: 1px solid var(--border-color);
            position: sticky;
            top: 0;
            z-index: 100;
        }

        .header-container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: var(--spacing-md) var(--spacing-lg);
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--primary-color);
            letter-spacing: -0.5px;
        }

        .logo span {
            color: var(--accent-color);
        }

        .main-nav ul {
            list-style: none;
            display: flex;
            gap: var(--spacing-lg);
        }

        .main-nav a {
            color: var(--text-muted);
            font-weight: 500;
            font-size: 0.95rem;
        }

        .main-nav a:hover {
            color: var(--primary-color);
            text-decoration: none;
        }

        /* Main Layout Grid */
        .page-wrapper {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: var(--spacing-xl) var(--spacing-lg);
            display: grid;
            grid-template-columns: 1fr;
            gap: var(--spacing-xl);
        }

        /* Typography inside Article */
        article {
            max-width: var(--content-width);
            margin: 0 auto;
        }

        .article-header {
            margin-bottom: var(--spacing-lg);
        }

        .category-tag {
            display: inline-block;
            text-transform: uppercase;
            font-size: 0.75rem;
            font-weight: 700;
            letter-spacing: 1px;
            color: var(--accent-color);
            margin-bottom: var(--spacing-md);
        }

        .article-title {
            font-size: clamp(2rem, 4vw, 3rem);
            line-height: var(--line-height-heading);
            font-weight: 800;
            margin-bottom: var(--spacing-md);
            letter-spacing: -0.02em;
        }

        .article-subtitle {
            font-size: clamp(1.1rem, 2vw, 1.3rem);
            color: var(--text-muted);
            margin-bottom: var(--spacing-lg);
            font-weight: 400;
        }

        .article-meta {
            display: flex;
            align-items: center;
            gap: var(--spacing-md);
            padding-top: var(--spacing-md);
            border-top: 1px solid var(--border-color);
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        .author-avatar {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            object-fit: cover;
        }

        .meta-details strong {
            color: var(--text-main);
            display: block;
        }

        .article-figure {
            margin: var(--spacing-lg) 0;
        }

        .article-figure figcaption {
            text-align: center;
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-top: var(--spacing-sm);
            font-style: italic;
        }

        .article-body {
            font-size: 1.125rem;
        }

        .article-body p {
            margin-bottom: 1.5em;
        }

        .article-body h2 {
            font-size: 1.75rem;
            margin: 2em 0 1em;
            line-height: var(--line-height-heading);
            color: var(--primary-color);
        }

        .article-body h3 {
            font-size: 1.4rem;
            margin: 1.5em 0 0.75em;
        }

        .article-body blockquote {
            border-left: 4px solid var(--accent-color);
            padding-left: var(--spacing-md);
            margin: var(--spacing-lg) 0;
            font-size: 1.25rem;
            font-style: italic;
            color: var(--primary-color);
            background: var(--bg-alt);
            padding: var(--spacing-md) var(--spacing-lg);
            border-radius: 0 8px 8px 0;
        }

        /* Table Styles */
        .table-responsive {
            width: 100%;
            overflow-x: auto;
            margin: var(--spacing-lg) 0;
            border-radius: 4px;
            box-shadow: 0 0 0 1px var(--border-color); /* Cleaner than standard border */
        }

        .article-body table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            font-size: 1rem;
            white-space: nowrap; /* Prevents awkward wrapping on small screens */
        }

        @media (min-width: 640px) {
            .article-body table {
                white-space: normal;
            }
        }

        .article-body th, 
        .article-body td {
            padding: 1rem;
            border-bottom: 1px solid var(--border-color);
        }

        .article-body th {
            background-color: var(--bg-alt);
            font-weight: 700;
            color: var(--primary-color);
            border-bottom: 2px solid var(--border-color); /* Thicker border for header */
        }

        .article-body tr:last-child td {
            border-bottom: none;
        }

        .article-body tr:nth-child(even) {
            background-color: #fafafa;
        }

        /* Related Articles Sidebar / Section */
        .related-articles {
            background-color: var(--bg-alt);
            padding: var(--spacing-lg);
            border-radius: 8px;
            border: 1px solid var(--border-color);
            align-self: start;
        }

        .related-articles h3 {
            font-size: 1.25rem;
            margin-bottom: var(--spacing-lg);
            padding-bottom: var(--spacing-sm);
            border-bottom: 2px solid var(--border-color);
            color: var(--primary-color);
        }

        .related-item {
            margin-bottom: var(--spacing-lg);
            display: flex;
            gap: var(--spacing-md);
        }

        .related-item:last-child {
            margin-bottom: 0;
        }

        .related-item-img {
            flex: 0 0 80px;
            height: 80px;
            border-radius: 4px;
            object-fit: cover;
        }

        .related-item-content h4 {
            font-size: 1rem;
            line-height: 1.4;
            margin-bottom: 0.25rem;
        }

        .related-item-content a {
            color: var(--text-main);
            text-decoration: none;
        }

        .related-item-content a:hover {
            color: var(--accent-color);
        }

        .related-item-content time {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* Footer */
        .site-footer {
            background-color: var(--primary-color);
            color: #ffffff;
            padding: var(--spacing-xl) var(--spacing-lg);
            text-align: center;
            margin-top: var(--spacing-xl);
        }

        .site-footer p {
            color: #94a3b8;
            font-size: 0.9rem;
        }

        /* Responsive Design */
        @media (min-width: 1024px) {
            .page-wrapper {
                grid-template-columns: 1fr 350px; /* Two column layout on desktop */
            }
            .article-body {
                padding-right: var(--spacing-lg);
            }
        }

        @media (max-width: 768px) {
            .main-nav {
                display: none; /* In a real app, implement a hamburger menu here */
            }
            .article-meta {
                flex-direction: column;
                align-items: flex-start;
            }
            .related-item {
                flex-direction: column;
            }
            .related-item-img {
                width: 100%;
                height: 160px;
                flex: auto;
            }
        }

        .post-meta {
            margin-bottom: 15px;
            font-style: italic;
        }