body { font-family: 'Arial', sans-serif; line-height: 1.6; color: #333; max-width: 1200px; margin: 0 auto; padding: 20px; }
        h1, h2, h3 { color: #e67e22; margin-top: 25px; }
        h1 { font-size: 2.5em; }
        h2 { font-size: 2em; }
        h3 { font-size: 1.5em; }
        .logo { font-size: 2.2em; font-weight: bold; color: #c0392b; margin-bottom: 20px; }
        nav { background: #f1c40f; padding: 10px; margin-bottom: 20px; }
        nav a { color: #333; text-decoration: none; margin: 0 10px; }
        .mobile-menu { display: none; }
        @media (max-width: 768px) {
            .desktop-menu { display: none; }
            .mobile-menu { display: block; text-align: center; background: #3498db; color: white; padding: 10px; }
            .logo { font-size: 1.8em; }
        }
        img { max-width: 100%; height: auto; margin: 20px 0; }
        .download-btn, .login-btn { display: inline-block; background: #2ecc71; color: white; padding: 10px 20px; margin: 10px 0; text-decoration: none; border-radius: 5px; }
        .login-btn { background: #3498db; }
        footer { margin-top: 40px; padding: 20px; background: #2c3e50; color: white; }
        .tags { margin-top: 20px; }
        .tag { background: #95a5a6; color: white; padding: 5px 10px; margin: 5px; display: inline-block; border-radius: 3px; }