body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; line-height: 1.6; color: #333; max-width: 1200px; margin: 0 auto; padding: 20px; }
        h1, h2, h3 { color: #2c5e8f; margin-top: 1.5em; }
        h1 { font-size: 2.2em; border-bottom: 2px solid #ffd700; }
        h2 { font-size: 1.8em; }
        h3 { font-size: 1.5em; color: #4a7db3; }
        .logo { font-size: 2.5em; font-weight: bold; color: #ff9900; text-shadow: 2px 2px 4px rgba(0,0,0,0.2); margin: 20px 0; }
        .mobile-nav { display: none; background: #2c5e8f; color: white; padding: 10px; text-align: center; cursor: pointer; }
        nav { background: #2c5e8f; padding: 15px; margin-bottom: 30px; }
        nav ul { list-style: none; padding: 0; display: flex; justify-content: space-around; }
        nav a { color: white; text-decoration: none; font-weight: bold; }
        .download-btn, .login-btn { background: #4CAF50; color: white; padding: 12px 25px; border-radius: 5px; text-decoration: none; margin: 15px 0; display: inline-block; }
        .login-btn { background: #2196F3; }
        img { max-width: 100%; height: auto; margin: 20px 0; border-radius: 8px; }
        .tag { background: #f0f0f0; padding: 5px 10px; border-radius: 15px; margin: 5px; display: inline-block; }
        footer { margin-top: 50px; padding: 20px; background: #2c5e8f; color: white; text-align: center; }
        @media (max-width: 768px) {
            nav ul { flex-direction: column; align-items: center; }
            .mobile-nav { display: block; }
            nav { display: none; }
        }