body { font-family: 'Arial', sans-serif; line-height: 1.6; color: #333; max-width: 1200px; margin: 0 auto; padding: 20px; background-color: #f5f5f5; }
        h1, h2, h3 { color: #e67e22; }
        h1 { font-size: 2.5em; }
        h2 { font-size: 1.8em; margin-top: 30px; }
        h3 { font-size: 1.4em; }
        .logo { font-size: 2.2em; font-weight: bold; color: #e74c3c; text-shadow: 2px 2px 4px rgba(0,0,0,0.1); }
        nav { background-color: #2c3e50; padding: 15px; margin-bottom: 20px; }
        nav a { color: white; text-decoration: none; margin: 0 15px; }
        .mobile-menu { display: none; }
        img { max-width: 100%; height: auto; margin: 20px 0; }
        .btn { display: inline-block; padding: 12px 25px; background-color: #e74c3c; color: white; text-decoration: none; border-radius: 5px; margin: 10px 0; }
        .download-section { background-color: #ecf0f1; padding: 20px; border-radius: 8px; margin: 25px 0; }
        footer { margin-top: 40px; padding: 20px; background-color: #2c3e50; color: white; text-align: center; }
        @media (max-width: 768px) {
            .desktop-menu { display: none; }
            .mobile-menu { display: block; text-align: center; margin-bottom: 15px; }
            h1 { font-size: 2em; }
        }