body { font-family: 'Arial', sans-serif; line-height: 1.6; color: #333; max-width: 1200px; margin: 0 auto; padding: 20px; }
        .mobile-nav { display: none; }
        @media (max-width: 768px) {
            .desktop-nav { display: none; }
            .mobile-nav { display: block; background: #ff9900; padding: 10px; text-align: center; }
            .mobile-nav button { background: #fff; border: none; padding: 5px 10px; cursor: pointer; }
        }
        h1 { color: #ff6600; border-bottom: 2px solid #ff9900; padding-bottom: 10px; }
        h2 { color: #ff9900; margin-top: 30px; }
        h3 { color: #ffcc00; }
        .logo { font-size: 28px; font-weight: bold; color: #ff6600; text-shadow: 1px 1px 2px #ccc; }
        .download-btn { background: #4CAF50; color: white; padding: 10px 20px; border-radius: 5px; text-decoration: none; display: inline-block; margin: 10px 0; }
        .login-btn { background: #2196F3; color: white; padding: 10px 20px; border-radius: 5px; text-decoration: none; display: inline-block; margin: 10px 0; }
        img { max-width: 100%; height: auto; margin: 20px 0; }
        .footer { margin-top: 50px; padding-top: 20px; border-top: 1px solid #eee; }
        .tags { margin-top: 20px; }
        .tag { background: #eee; padding: 5px 10px; margin: 5px; display: inline-block; }