body { font-family: 'Arial', sans-serif; line-height: 1.6; color: #333; max-width: 1200px; margin: 0 auto; padding: 20px; }
        .logo { font-size: 2.5em; font-weight: bold; color: #e74c3c; text-align: center; margin: 20px 0; }
        nav { background: #2c3e50; color: white; padding: 15px; }
        nav ul { list-style: none; padding: 0; display: flex; justify-content: center; }
        nav ul li { margin: 0 15px; }
        nav ul li a { color: white; text-decoration: none; }
        .mobile-nav-btn { display: none; background: #e74c3c; color: white; border: none; padding: 10px; cursor: pointer; }
        h1 { color: #e74c3c; border-bottom: 2px solid #e74c3c; padding-bottom: 10px; }
        h2 { color: #2c3e50; margin-top: 30px; }
        h3 { color: #3498db; }
        .btn { display: inline-block; background: #e74c3c; color: white; padding: 10px 20px; margin: 10px 0; text-decoration: none; border-radius: 5px; }
        .download-section, .login-section { text-align: center; margin: 30px 0; }
        img { max-width: 100%; height: auto; margin: 20px 0; }
        .tags { margin: 20px 0; }
        .tag { background: #3498db; color: white; padding: 5px 10px; margin: 5px; display: inline-block; border-radius: 3px; }
        footer { background: #2c3e50; color: white; text-align: center; padding: 20px; margin-top: 30px; }
        @media (max-width: 768px) {
            nav ul { flex-direction: column; align-items: center; }
            .mobile-nav-btn { display: block; margin: 10px auto; }
            nav ul.hidden { display: none; }
        }