body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; line-height: 1.6; color: #333; max-width: 1200px; margin: 0 auto; padding: 20px; }
        header { display: flex; justify-content: space-between; align-items: center; padding: 15px 0; border-bottom: 2px solid #007BFF; }
        .logo { font-size: 28px; font-weight: bold; color: #007BFF; text-decoration: none; }
        nav ul { display: flex; list-style: none; gap: 20px; }
        nav a { text-decoration: none; color: #333; }
        .mobile-nav-btn { display: none; background: none; border: none; font-size: 24px; cursor: pointer; }
        h1 { color: #007BFF; border-bottom: 2px solid #eee; padding-bottom: 10px; }
        h2 { color: #2C3E50; margin-top: 30px; }
        h3 { color: #3498DB; }
        .download-btn, .login-btn { display: inline-block; padding: 12px 25px; background: #007BFF; color: white; border-radius: 5px; text-decoration: none; margin: 15px 0; }
        .image-container { text-align: center; margin: 25px 0; }
        img { max-width: 100%; height: auto; border-radius: 8px; }
        .tags { margin: 20px 0; }
        .tag { background: #f0f0f0; padding: 5px 10px; border-radius: 20px; margin: 5px; display: inline-block; }
        footer { margin-top: 50px; padding: 20px 0; border-top: 2px solid #eee; text-align: center; }
        @media (max-width: 768px) {
            nav { display: none; }
            .mobile-nav-btn { display: block; }
            .show-nav { display: block; }
            header { flex-direction: column; align-items: flex-start; }
        }