:root {
            --primary: #3182ce;
            --primary-dark: #2b6cb0;
            --text-dark: #1a202c;
            --text-body: #4a5568;
            --text-light: #718096;
            --bg-light: #f7fafc;
            --border: #e2e8f0;
        }

        * { box-sizing: border-box; margin: 0; padding: 0; }
        
        body { 
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; 
            line-height: 1.6; 
            color: var(--text-body); 
            background: #ffffff; 
        }

        a { color: var(--primary); text-decoration: none; font-weight: 500; transition: color 0.2s; }
        a:hover { color: var(--primary-dark); }

        /* --- HEADER --- */
        .site-header { border-bottom: 1px solid var(--border); padding: 20px 0; }
        .header-inner { max-width: 1200px; margin: 0 auto; padding: 0 20px; display: flex; justify-content: space-between; align-items: center; }
        .logo { font-size: 1.5rem; font-weight: 800; color: var(--text-dark); letter-spacing: -0.5px; }
        .logo span { color: var(--primary); }
        .nav-links { display: flex; gap: 24px; }
        .nav-links a { color: var(--text-body); font-weight: 500; font-size: 0.95rem; }
        .nav-links a:hover { color: var(--primary); }
        .btn-primary { background: var(--primary); color: white !important; padding: 10px 20px; border-radius: 8px; font-weight: 600; transition: background 0.2s; }
        .btn-primary:hover { background: var(--primary-dark); }

        /* --- HERO SECTION --- */
        .blog-hero { 
            background: linear-gradient(135deg, #f6f8fb 0%, #ebf4ff 100%); 
            padding: 80px 20px; 
            text-align: center; 
            border-bottom: 1px solid var(--border);
        }
        .blog-hero h1 { font-size: 3rem; color: var(--text-dark); margin-bottom: 16px; line-height: 1.2; letter-spacing: -1px; }
        .blog-hero p { font-size: 1.25rem; color: var(--text-body); max-width: 600px; margin: 0 auto 30px; }
        
        .search-bar { 
            max-width: 500px; 
            margin: 0 auto; 
            display: flex; 
            background: white; 
            border: 1px solid var(--border); 
            border-radius: 50px; 
            overflow: hidden; 
            box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05);
        }
        .search-bar input { flex: 1; border: none; padding: 16px 24px; font-size: 1rem; outline: none; }
        .search-bar button { background: var(--primary); color: white; border: none; padding: 0 24px; font-weight: 600; cursor: pointer; transition: background 0.2s; }
        .search-bar button:hover { background: var(--primary-dark); }

        /* --- CATEGORIES --- */
        .categories-section { max-width: 1200px; margin: 60px auto 40px; padding: 0 20px; }
        .section-title { font-size: 1.5rem; color: var(--text-dark); margin-bottom: 24px; font-weight: 700; }
        .category-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 20px; }
        .category-card { 
            background: white; border: 1px solid var(--border); border-radius: 12px; padding: 24px; 
            text-align: center; transition: all 0.3s ease; cursor: pointer; text-decoration: none; color: inherit;
        }
        .category-card:hover { transform: translateY(-4px); box-shadow: 0 10px 15px -3px rgba(0,0,0,0.08); border-color: var(--primary); }
        .category-icon { font-size: 2.5rem; margin-bottom: 12px; display: block; }
        .category-name { font-size: 1.1rem; font-weight: 700; color: var(--text-dark); margin-bottom: 4px; }
        .category-count { font-size: 0.85rem; color: var(--text-light); }

        /* --- FEATURED POST --- */
        .featured-section { max-width: 1200px; margin: 0 auto 60px; padding: 0 20px; }
        .featured-card { 
            display: grid; grid-template-columns: 1fr 1fr; background: white; border: 1px solid var(--border); 
            border-radius: 16px; overflow: hidden; transition: all 0.3s ease; text-decoration: none; color: inherit;
        }
        .featured-card:hover { box-shadow: 0 20px 25px -5px rgba(0,0,0,0.1); }
        .featured-image { 
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); 
            display: flex; align-items: center; justify-content: center; font-size: 5rem; color: rgba(255,255,255,0.9); min-height: 300px;
        }
        .featured-content { padding: 40px; display: flex; flex-direction: column; justify-content: center; }
        .featured-tag { display: inline-block; background: #ebf8ff; color: var(--primary); font-size: 0.75rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.5px; padding: 6px 12px; border-radius: 20px; width: fit-content; margin-bottom: 16px; }
        .featured-title { font-size: 2rem; color: var(--text-dark); margin-bottom: 16px; line-height: 1.3; font-weight: 800; }
        .featured-title:hover { color: var(--primary); }
        .featured-excerpt { font-size: 1.1rem; color: var(--text-body); margin-bottom: 24px; line-height: 1.6; }
        .read-more { font-weight: 600; color: var(--primary); display: flex; align-items: center; gap: 8px; }

        /* --- RECENT POSTS GRID --- */
        .recent-section { max-width: 1200px; margin: 0 auto 80px; padding: 0 20px; }
        .posts-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); gap: 32px; }
        .post-card { 
            background: white; border: 1px solid var(--border); border-radius: 12px; overflow: hidden; 
            text-decoration: none; color: inherit; transition: all 0.3s ease; display: flex; flex-direction: column;
        }
        .post-card:hover { transform: translateY(-6px); box-shadow: 0 14px 28px rgba(0,0,0,0.08); border-color: #cbd5e0; }
        .post-thumb { height: 180px; display: flex; align-items: center; justify-content: center; font-size: 3.5rem; color: rgba(255,255,255,0.9); }
        .thumb-1 { background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%); }
        .thumb-2 { background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%); }
        .thumb-3 { background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%); }
        .thumb-4 { background: linear-gradient(135deg, #fa709a 0%, #fee140 100%); }
        
        .post-content { padding: 24px; display: flex; flex-direction: column; flex-grow: 1; }
        .post-tag { display: inline-block; font-size: 0.75rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.5px; color: var(--primary); background: #ebf8ff; padding: 4px 10px; border-radius: 20px; margin-bottom: 12px; width: fit-content; }
        .post-title { font-size: 1.25rem; line-height: 1.4; color: var(--text-dark); margin-bottom: 12px; font-weight: 700; }
        .post-card:hover .post-title { color: var(--primary); }
        .post-meta { font-size: 0.85rem; color: var(--text-light); margin-top: auto; display: flex; align-items: center; gap: 5px; }

        /* --- NEWSLETTER --- */
        .newsletter-section { background: linear-gradient(135deg, #1a202c 0%, #2d3748 100%); padding: 80px 20px; text-align: center; color: white; }
        .newsletter-inner { max-width: 600px; margin: 0 auto; }
        .newsletter-section h2 { font-size: 2rem; margin-bottom: 16px; color: white; }
        .newsletter-section p { font-size: 1.1rem; color: #a0aec0; margin-bottom: 32px; }
        .newsletter-form { display: flex; gap: 12px; }
        .newsletter-form input { flex: 1; padding: 16px 20px; border-radius: 8px; border: 1px solid #4a5568; background: #2d3748; color: white; font-size: 1rem; outline: none; }
        .newsletter-form input:focus { border-color: var(--primary); }
        .newsletter-form button { background: var(--primary); color: white; border: none; padding: 16px 32px; border-radius: 8px; font-weight: 700; font-size: 1rem; cursor: pointer; transition: background 0.2s; white-space: nowrap; }
        .newsletter-form button:hover { background: var(--primary-dark); }

        /* --- FOOTER --- */
        .site-footer { background: #f7fafc; border-top: 1px solid var(--border); padding: 40px 20px; text-align: center; color: var(--text-light); font-size: 0.9rem; }
        /* flex-wrap: the row could not break, so "Terms of Service" ran 25px past
           the viewport edge on a 375px screen. */
        .footer-links { display: flex; justify-content: center; gap: 24px; margin-bottom: 16px; flex-wrap: wrap; }
        .footer-links a { color: var(--text-body); }

        /* --- RESPONSIVE --- */
        @media (max-width: 768px) {
            .blog-hero h1 { font-size: 2.2rem; }
            .featured-card { grid-template-columns: 1fr; }
            .featured-image { min-height: 200px; }
            .featured-content { padding: 24px; }
            .featured-title { font-size: 1.5rem; }
            .newsletter-form { flex-direction: column; }
            .nav-links { display: none; } /* Simplified for demo, would use hamburger in prod */
        }