body { font-family: 'Segoe UI', sans-serif; line-height: 1.6; color: #333; margin: 0; padding: 0; }
        .header { background: #1a4b9c; color: white; padding: 15px; text-align: center; position: relative; }
        .logo { font-size: 28px; font-weight: bold; margin-bottom: 10px; }
        .nav { display: flex; justify-content: center; gap: 20px; }
        .nav a { color: white; text-decoration: none; }
        .mobile-toggle { display: none; position: absolute; right: 15px; top: 15px; }
        .content { max-width: 1000px; margin: 20px auto; padding: 0 15px; }
        h1, h2, h3 { color: #1a4b9c; margin-top: 30px; }
        h1 { font-size: 2.2em; }
        h2 { font-size: 1.8em; }
        h3 { font-size: 1.5em; }
        .highlight { background: #f0f8ff; padding: 15px; border-radius: 5px; margin: 15px 0; }
        .download-btn, .login-btn { display: inline-block; background: #4CAF50; color: white; padding: 12px 25px; margin: 15px 0; text-decoration: none; border-radius: 5px; font-weight: bold; }
        .login-btn { background: #2196F3; }
        .image-container { text-align: center; margin: 25px 0; }
        .image-container img { max-width: 100%; height: auto; border-radius: 8px; }
        .tags { margin: 20px 0; }
        .tags a { background: #e0e0e0; padding: 5px 10px; margin: 3px; display: inline-block; border-radius: 3px; text-decoration: none; color: #333; }
        .footer { background: #333; color: white; text-align: center; padding: 20px; margin-top: 30px; }
        @media (max-width: 768px) {
            .nav { display: none; flex-direction: column; align-items: center; }
            .nav.active { display: flex; }
            .mobile-toggle { display: block; }
            .content { padding: 0 10px; }
        }