body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; line-height: 1.6; color: #333; max-width: 1200px; margin: 0 auto; padding: 20px; }
        .mobile-nav { display: none; background: #ff6b35; color: white; padding: 10px; text-align: center; cursor: pointer; }
        @media (max-width: 768px) { .desktop-nav { display: none; } .mobile-nav { display: block; } }
        nav { background: #ff6b35; padding: 15px; margin-bottom: 30px; }
        nav a { color: white; text-decoration: none; margin: 0 15px; font-weight: bold; }
        h1 { color: #ff6b35; border-bottom: 3px solid #f7931e; padding-bottom: 10px; }
        h2 { color: #f7931e; margin-top: 40px; }
        h3 { color: #ff8c42; }
        .download-btn { background: #4CAF50; color: white; padding: 12px 25px; border-radius: 5px; text-decoration: none; display: inline-block; margin: 20px 0; }
        .login-btn { background: #2196F3; color: white; padding: 12px 25px; border-radius: 5px; text-decoration: none; display: inline-block; margin: 20px 10px; }
        img { max-width: 100%; height: auto; margin: 20px 0; }
        .gallery { display: flex; flex-wrap: wrap; gap: 15px; }
        .gallery img { width: 30%; }
        table { width: 100%; border-collapse: collapse; margin: 20px 0; }
        th, td { border: 1px solid #ddd; padding: 12px; text-align: left; }
        th { background: #f2f2f2; }