body { font-family: 'Arial', sans-serif; line-height: 1.6; color: #333; max-width: 1200px; margin: 0 auto; padding: 20px; }
        h1, h2, h3 { color: #0066cc; margin-top: 30px; }
        h1 { font-size: 2.5em; }
        h2 { font-size: 2em; }
        h3 { font-size: 1.5em; }
        .logo { font-size: 2em; font-weight: bold; color: #ff9900; text-decoration: none; }
        nav { background: #f8f8f8; padding: 15px; margin-bottom: 20px; }
        nav ul { list-style: none; padding: 0; display: flex; justify-content: space-around; }
        nav li { margin: 0 10px; }
        nav a { text-decoration: none; color: #0066cc; }
        .mobile-menu { display: none; }
        @media (max-width: 768px) {
            nav ul { flex-direction: column; display: none; }
            .mobile-menu { display: block; text-align: center; background: #0066cc; color: white; padding: 10px; cursor: pointer; }
            nav.active ul { display: flex; }
        }
        .download-btn, .login-btn { background: #4CAF50; color: white; padding: 12px 25px; text-align: center; display: inline-block; margin: 15px 0; text-decoration: none; border-radius: 5px; }
        .login-btn { background: #2196F3; }
        img { max-width: 100%; height: auto; margin: 20px 0; }
        .tags { margin: 20px 0; }
        .tag { background: #e0e0e0; padding: 5px 10px; margin: 5px; display: inline-block; border-radius: 3px; }
        footer { margin-top: 40px; padding: 20px; background: #f8f8f8; text-align: center; }