body { font-family: 'Arial', sans-serif; line-height: 1.6; color: #333; max-width: 1200px; margin: 0 auto; padding: 20px; }
        h1 { color: #ff4500; text-align: center; }
        h2 { color: #0066cc; margin-top: 30px; }
        h3 { color: #2e8b57; }
        .nav { background: #ff4500; padding: 10px; display: flex; justify-content: space-around; }
        .nav a { color: white; text-decoration: none; }
        .mobile-nav-btn { display: none; background: #0066cc; color: white; padding: 10px; text-align: center; }
        img { max-width: 100%; height: auto; margin: 20px 0; }
        .download-btn, .login-btn { display: block; width: 200px; margin: 20px auto; padding: 15px; text-align: center; background: #0066cc; color: white; text-decoration: none; border-radius: 5px; }
        .tags { margin: 20px 0; }
        .tags a { background: #f0f0f0; padding: 5px 10px; margin: 5px; text-decoration: none; color: #333; border-radius: 3px; }
        footer { margin-top: 50px; padding: 20px; background: #333; color: white; text-align: center; }
        @media (max-width: 768px) {
            .nav { flex-direction: column; display: none; }
            .mobile-nav-btn { display: block; }
            .nav.active { display: flex; }
        }