* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
            line-height: 1.7;
            color: #333;
            background-color: #f9f9f9;
        }
        
        /* Header */
        header {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 1rem 0;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }
        
        nav {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 2rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        nav h1 {
            font-size: 1.5rem;
        }
        
        nav a {
            color: white;
            text-decoration: none;
            margin-left: 2rem;
            transition: opacity 0.3s;
        }
        
        nav a:hover {
            opacity: 0.8;
        }
        
        /* Main Content */
        main {
            max-width: 800px;
            margin: 3rem auto;
            padding: 0 2rem;
        }
        
        article {
            background: white;
            padding: 3rem;
            border-radius: 10px;
            box-shadow: 0 2px 20px rgba(0,0,0,0.08);
        }
        
        /* Article Meta */
        .article-meta {
            display: flex;
            gap: 1.5rem;
            color: #666;
            font-size: 0.9rem;
            margin-bottom: 2rem;
            padding-bottom: 1rem;
            border-bottom: 1px solid #eee;
        }
        
        .article-meta span {
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        
        /* Typography */
        h1 {
            font-size: 2.5rem;
            color: #1a1a1a;
            margin-bottom: 1rem;
            line-height: 1.2;
        }
        
        h2 {
            font-size: 1.8rem;
            color: #2d3748;
            margin: 2.5rem 0 1rem 0;
            padding-top: 1rem;
        }
        
        h3 {
            font-size: 1.3rem;
            color: #4a5568;
            margin: 1.5rem 0 1rem 0;
        }
        
        p {
            margin-bottom: 1.2rem;
            color: #4a5568;
        }
        
        strong {
            color: #2d3748;
            font-weight: 600;
        }
        
        /* Lists */
        ul, ol {
            margin: 1.5rem 0;
            padding-left: 2rem;
        }
        
        li {
            margin-bottom: 0.8rem;
            color: #4a5568;
        }
        
        /* Horizontal Rule */
        hr {
            border: none;
            border-top: 2px solid #e2e8f0;
            margin: 3rem 0;
        }
        
        /* Info Boxes */
        .info-box {
            background: #f0f4ff;
            border-left: 4px solid #667eea;
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 5px;
        }
        
        .info-box p:last-child {
            margin-bottom: 0;
        }
        
        /* Warning Boxes */
        .warning-box {
            background: #fff5f5;
            border-left: 4px solid #fc8181;
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 5px;
        }
        
        /* CTA Section */
        .cta-section {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 2.5rem;
            border-radius: 10px;
            margin: 3rem 0;
            text-align: center;
        }
        
        .cta-section h3 {
            color: white;
            margin-bottom: 1rem;
        }
        
        .cta-section p {
            color: rgba(255,255,255,0.9);
            margin-bottom: 1.5rem;
        }
        
        .cta-button {
            display: inline-block;
            background: white;
            color: #667eea;
            padding: 1rem 2.5rem;
            border-radius: 50px;
            text-decoration: none;
            font-weight: 600;
            transition: transform 0.3s, box-shadow 0.3s;
        }
        
        .cta-button:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 25px rgba(0,0,0,0.2);
        }
        
        /* Author Box */
        .author-box {
            background: #f7fafc;
            border-radius: 10px;
            padding: 2rem;
            margin: 3rem 0;
            display: flex;
            align-items: center;
            gap: 1.5rem;
        }
        
        .author-box img {
            width: 80px;
            height: 80px;
            border-radius: 50%;
            object-fit: cover;
        }
        
        .author-info h4 {
            margin-bottom: 0.5rem;
            color: #2d3748;
        }
        
        .author-info p {
            margin-bottom: 0.5rem;
            font-size: 0.9rem;
        }
        
        .social-links {
            display: flex;
            gap: 1rem;
            margin-top: 0.5rem;
        }
        
        .social-links a {
            color: #667eea;
            text-decoration: none;
            font-size: 0.9rem;
        }
        
        /* Footer */
        footer {
            background: #2d3748;
            color: white;
            padding: 2rem;
            text-align: center;
            margin-top: 4rem;
        }
        
        footer a {
            color: #90cdf4;
            text-decoration: none;
        }
        
        /* Responsive */
        @media (max-width: 768px) {
            article {
                padding: 2rem 1.5rem;
            }
            
            h1 {
                font-size: 2rem;
            }
            
            h2 {
                font-size: 1.5rem;
            }
            
            nav {
                flex-direction: column;
                gap: 1rem;
            }
            
            nav a {
                margin-left: 0;
                margin-top: 0.5rem;
            }
            
            .author-box {
                flex-direction: column;
                text-align: center;
            }
        }