body { font-family: 'Segoe UI', Arial, sans-serif; line-height: 1.6; color: #333; max-width: 1200px; margin: 0 auto; padding: 20px; }
        h1 { color: #2c3e50; border-bottom: 3px solid #e74c3c; padding-bottom: 10px; }
        h2 { color: #e74c3c; margin-top: 30px; }
        h3 { color: #3498db; }
        .mobile-nav { display: none; background: #2c3e50; color: white; padding: 10px; text-align: center; cursor: pointer; }
        .nav-links { display: flex; justify-content: space-around; background: #2c3e50; padding: 15px 0; }
        .nav-links a { color: white; text-decoration: none; font-weight: bold; }
        .download-btn { background: #27ae60; color: white; padding: 12px 25px; border-radius: 5px; text-decoration: none; display: inline-block; margin: 15px 0; }
        .login-btn { background: #3498db; color: white; padding: 12px 25px; border-radius: 5px; text-decoration: none; display: inline-block; margin: 15px 10px; }
        img { max-width: 100%; height: auto; margin: 20px 0; }
        .tags { margin: 20px 0; }
        .tag { background: #f1f1f1; padding: 5px 10px; margin: 5px; display: inline-block; border-radius: 3px; }
        .copyright { margin-top: 50px; font-size: 0.9em; color: #777; text-align: center; }
        @media (max-width: 768px) {
            .nav-links { display: none; flex-direction: column; }
            .mobile-nav { display: block; }
            .nav-links.active { display: flex; }
            body { padding: 10px; }
        }