body { font-family: 'Arial', sans-serif; line-height: 1.6; color: #333; margin: 0; padding: 0; background-color: #f9f9f9; }
        .container { max-width: 1200px; margin: 0 auto; padding: 20px; }
        .logo { font-size: 2.5em; font-weight: bold; color: #ff5722; text-align: center; margin: 20px 0; }
        .mobile-menu { display: none; background: #333; color: white; padding: 10px; text-align: center; cursor: pointer; }
        nav { background: #333; padding: 10px 0; }
        nav ul { list-style: none; padding: 0; margin: 0; text-align: center; }
        nav ul li { display: inline; margin: 0 15px; }
        nav ul li a { color: white; text-decoration: none; }
        h1 { font-size: 2.2em; color: #2c3e50; margin-bottom: 20px; }
        h2 { font-size: 1.8em; color: #e74c3c; margin: 30px 0 15px; }
        h3 { font-size: 1.5em; color: #3498db; margin: 25px 0 10px; }
        .download-btn, .login-btn { display: inline-block; background: #27ae60; color: white; padding: 12px 25px; margin: 15px 0; text-decoration: none; border-radius: 5px; font-weight: bold; }
        .download-btn:hover, .login-btn:hover { background: #219653; }
        img { max-width: 100%; height: auto; margin: 20px 0; border-radius: 8px; }
        .tags { margin: 20px 0; }
        .tags a { background: #eee; color: #333; padding: 5px 10px; margin-right: 5px; text-decoration: none; border-radius: 3px; }
        footer { background: #333; color: white; text-align: center; padding: 20px; margin-top: 30px; }
        @media (max-width: 768px) {
            .mobile-menu { display: block; }
            nav ul { display: none; }
            nav.active ul { display: block; }
            nav ul li { display: block; margin: 10px 0; }
        }