body { font-family: 'Segoe UI', 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: #ff4500; text-align: center; margin: 20px 0; }
        nav { background: #333; padding: 10px; display: flex; justify-content: space-around; }
        nav a { color: white; text-decoration: none; }
        .mobile-nav { display: none; }
        h1 { color: #ff4500; border-bottom: 2px solid #ff4500; }
        h2 { color: #e63900; }
        h3 { color: #d62800; }
        .download-btn { display: block; background: #4CAF50; color: white; padding: 15px; text-align: center; margin: 20px 0; border-radius: 5px; }
        .login-btn { display: block; background: #2196F3; color: white; padding: 15px; text-align: center; margin: 20px 0; border-radius: 5px; }
        img { max-width: 100%; height: auto; margin: 20px 0; }
        .tags { margin: 20px 0; }
        .copyright { margin-top: 40px; text-align: center; font-size: 0.9em; color: #666; }
        @media (max-width: 768px) {
            .desktop-nav { display: none; }
            .mobile-nav { display: block; text-align: center; margin: 20px 0; }
            .mobile-menu { background: #333; color: white; padding: 10px; cursor: pointer; }
        }