body { font-family: 'Arial', sans-serif; line-height: 1.6; color: #333; max-width: 1200px; margin: 0 auto; padding: 20px; }
        h1 { color: #FF6B35; text-align: center; }
        h2 { color: #FF8C42; border-bottom: 2px solid #FF8C42; padding-bottom: 5px; }
        h3 { color: #FFA500; }
        a { color: #0066CC; text-decoration: none; }
        .nav { background: #333; color: white; padding: 10px; display: flex; justify-content: space-between; }
        .nav-mobile { display: none; }
        .logo { font-size: 24px; font-weight: bold; color: #FF6B35; }
        .download-btn { background: #4CAF50; color: white; padding: 10px 20px; border-radius: 5px; display: inline-block; margin: 20px 0; }
        .login-btn { background: #2196F3; color: white; padding: 10px 20px; border-radius: 5px; display: inline-block; margin: 20px 0; }
        img { max-width: 100%; height: auto; margin: 20px 0; }
        .tags { margin: 20px 0; }
        .footer { margin-top: 40px; padding-top: 20px; border-top: 1px solid #ddd; }
        @media (max-width: 768px) {
            .nav { flex-direction: column; }
            .nav-desktop { display: none; }
            .nav-mobile { display: block; text-align: center; margin-top: 10px; }
        }