:root { 
        --primary: #f26222; 
        --primary-dark: #d5531b;
        --bg: #fafafa;
        --surface: #ffffff;
        --text: #333333;
        --text-secondary: #666666;
        --border: #eaeaea;
        --font: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    }
    * { box-sizing: border-box; }
    body {
        font-family: var(--font); background-color: var(--bg); color: var(--text);
        margin: 0; padding: 0; line-height: 1.6;
    }
    /* HEADER & NAV */
    header { 
        background: var(--surface); box-shadow: 0 4px 12px rgba(0,0,0,0.05); 
        position: sticky; top: 0; z-index: 100;
    }
    .header-container {
        max-width: 1200px; margin: 0 auto; padding: 1rem 5%;
        display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap;
    }
    .logo { text-decoration: none; color: var(--text); font-weight: 800; font-size: 1.5rem; text-transform: uppercase; }
    .logo span { color: var(--primary); }
    
    nav { display: flex; align-items: center; }
    nav ul { list-style: none; margin: 0; padding: 0; display: flex; gap: 1.5rem; flex-wrap: wrap; }
    nav a { text-decoration: none; color: var(--text); font-weight: 600; font-size: 0.95rem; transition: color 0.2s; }
    nav a:hover, nav a.active { color: var(--primary); }
    
    .menu-toggle { display: none; flex-direction: column; cursor: pointer; gap: 5px; }
    .menu-toggle span { width: 25px; height: 3px; background-color: var(--text); border-radius: 3px; transition: 0.3s; }
    
    main { max-width: 1200px; margin: 2rem auto; padding: 0 1rem; min-height: 60vh; }
    
    /* HOMEPAGE SPECIFIC */
    .home-hero { background: var(--surface); padding: 4rem 2rem; border-radius: 12px; margin-bottom: 3rem; text-align: center; border: 1px solid var(--border); box-shadow: 0 4px 12px rgba(0,0,0,0.02); }
    .home-hero h1 { font-size: 2.5rem; color: var(--text); margin-top: 0; }
    .home-hero p { font-size: 1.1rem; color: var(--text-secondary); max-width: 800px; margin: 0 auto; }
    .home-hero img { max-width: 100%; height: auto; border-radius: 8px; margin: 2rem 0; box-shadow: 0 4px 12px rgba(0,0,0,0.1); }
    
    .section-title { text-align: center; margin-bottom: 2rem; font-size: 2rem; position: relative; padding-bottom: 0.5rem; }
    .section-title::after { content: ''; position: absolute; bottom:0; left: 50%; transform: translateX(-50%); width: 60px; height: 3px; background: var(--primary); border-radius: 3px;}
    
    .read-more-btn { display: block; width: fit-content; margin: 2rem auto 0; padding: 12px 32px; background: var(--primary); color: #fff; text-decoration: none; border-radius: 8px; font-weight: 600; font-size: 1rem; transition: background 0.2s, transform 0.2s; text-align: center; }
    .read-more-btn:hover { background: var(--primary-dark); transform: translateY(-2px); }

    /* GRID & CARDS */
    .post-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 2rem; }
    .post-card { background: var(--surface); border-radius: 8px; overflow: hidden; box-shadow: 0 4px 6px rgba(0,0,0,0.05); transition: transform 0.2s, box-shadow 0.2s; border: 1px solid var(--border); display: flex; flex-direction: column; }
    .post-card:hover { transform: translateY(-4px); box-shadow: 0 12px 20px rgba(0,0,0,0.1); }
    .post-thumbnail { width: 100%; height: 200px; object-fit: contain; background: #f0f0f0; border-bottom: 1px solid var(--border); }
    .post-card-content { padding: 1.5rem; flex: 1; display: flex; flex-direction: column; justify-content: space-between; }
    .post-card h3 { margin: 0 0 0.5rem; font-size: 1.15rem; line-height: 1.4; }
    .post-card a { text-decoration: none; color: var(--text); }
    .post-card a:hover { color: var(--primary); }
    .post-card .meta { margin-bottom: 0; margin-top: 1rem; color: var(--text-secondary); font-size: 0.85rem;}

    /* SINGLE POST / PAGE */
    .article-container { max-width: 800px; margin: 0 auto; background: var(--surface); padding: 3rem; border-radius: 12px; box-shadow: 0 4px 12px rgba(0,0,0,0.03); border: 1px solid var(--border); }
    h1 { font-size: 2.2rem; margin-top: 0; line-height: 1.3; }
    .meta { color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 2rem; display: flex; align-items: center; gap: 0.5rem; }
    .content img { max-width: 100%; height: auto; border-radius: 8px; margin: 1.5rem 0; }
    .content a { color: var(--primary); font-weight: 500; text-decoration: none; border-bottom: 1px solid transparent; transition: border-bottom-color 0.2s; }
    .content a:hover { border-bottom-color: var(--primary); }
    .content h2, .content h3 { margin-top: 2.5rem; }
    
    /* RESPONSIVE TABLES & CHARTS - FULLSCREEN */
    .table-responsive { width: 100%; overflow-x: auto; -webkit-overflow-scrolling: touch; margin: 1.5rem 0; }
    .content table { width: 100%; border-collapse: collapse; }
    .content th, .content td { border: 1px solid var(--border); padding: 0.75rem; text-align: left; white-space: normal; word-wrap: break-word; }
    .content th { background: #f9f9f9; font-weight: 600; }
    .content figure { margin: 1.5rem 0; width: 100%; max-width: 100%; }
    .content figure img { width: 100%; height: auto; }
    .content iframe, .content canvas, .content svg { max-width: 100%; width: 100%; height: auto; }
    
    /* RELATED POSTS */
    .related { margin-top: 4rem; padding-top: 2rem; border-top: 1px solid var(--border); }
    .related h3 { margin-bottom: 1.5rem; font-size: 1.5rem; }
    .related-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1.5rem; }
    .related .post-thumbnail { height: 140px; }
    
    /* FOOTER */
    footer { background: var(--surface); border-top: 1px solid var(--border); padding: 3rem 1rem 1.5rem; margin-top: 4rem; }
    .footer-content { max-width: 1200px; margin: 0 auto; display: flex; flex-direction: column; align-items: center; gap: 1.5rem; }
    .footer-nav ul { list-style:none; padding:0; margin:0; display:flex; gap: 1.5rem; flex-wrap: wrap; justify-content: center; }
    .footer-nav a { color: var(--text-secondary); text-decoration: none; font-size: 0.9rem; transition: color 0.2s; }
    .footer-nav a:hover { color: var(--primary); }
    .copyright { color: var(--text-secondary); font-size: 0.85rem; text-align: center; margin-top: 1.5rem; }

    @media (max-width: 768px) { 
        .header-container { align-items: center; position: relative; }
        .menu-toggle { display: flex; }
        nav { 
            display: none; position: absolute; top: 100%; left: 0; width: 100%; 
            background: var(--surface); box-shadow: 0 4px 6px rgba(0,0,0,0.05); padding: 1rem;
            border-top: 1px solid var(--border); z-index: 99;
        }
        nav.active { display: block; }
        nav ul { flex-direction: column; gap: 1rem; align-items: center; }
        
        main { padding: 0 0.5rem; margin: 1rem auto; }
        .article-container { padding: 1rem; } 
        h1 { font-size: 1.6rem; } 
        .home-hero { padding: 1.5rem 0.75rem; margin-bottom: 1.5rem; border-radius: 8px; }
        .home-hero h1 { font-size: 1.6rem; }
        .home-hero p { font-size: 0.95rem; }
        .home-hero img { margin: 1rem 0; }
        .section-title { font-size: 1.5rem; margin-bottom: 1.5rem; }
        
        /* Mobile homepage grid - full width, single column */
        .post-grid { grid-template-columns: 1fr; gap: 1rem; }
        .post-thumbnail { height: 160px; }
        .post-card-content { padding: 1rem; }
        .post-card h3 { font-size: 1rem; }
        
        /* Make tables/charts truly fullscreen on mobile */
        .content table { font-size: 0.85rem; }
        .content th, .content td { padding: 0.5rem; }
        .article-container { padding: 1rem; }
        
        /* Mobile overrides for Related Posts to show 2x2 */
        .related-grid { grid-template-columns: repeat(2, 1fr); gap: 0.75rem; }
        .related .post-thumbnail { height: 120px; }
        .related .post-card-content { padding: 0.75rem; }
        .related .post-card h3 { 
            font-size: 0.85rem; 
            line-height: 1.3; 
            margin-bottom: 0;
        }
    }