body { font-family: 'Arial', sans-serif; line-height: 1.6; color: #333; max-width: 1200px; margin: 0 auto; padding: 20px; }
        h1 { color: #d32f2f; text-align: center; margin-bottom: 30px; }
        h2 { color: #388e3c; margin-top: 40px; border-bottom: 2px solid #f5f5f5; padding-bottom: 10px; }
        h3 { color: #1976d2; margin-top: 25px; }
        .logo { font-size: 28px; font-weight: bold; color: #d32f2f; text-align: center; margin: 20px 0; }
        .nav { background-color: #f5f5f5; padding: 15px; display: flex; justify-content: space-around; flex-wrap: wrap; }
        .nav a { color: #333; text-decoration: none; font-weight: bold; }
        .mobile-nav-btn { display: none; background-color: #d32f2f; color: white; border: none; padding: 10px; margin: 10px auto; }
        .download-btn, .login-btn { display: inline-block; background-color: #388e3c; color: white; padding: 12px 25px; margin: 15px 0; text-decoration: none; border-radius: 5px; font-weight: bold; }
        .download-btn:hover, .login-btn:hover { background-color: #2e7d32; }
        img { max-width: 100%; height: auto; margin: 20px 0; border-radius: 8px; }
        .tags { margin: 30px 0; }
        .tags a { background-color: #e3f2fd; color: #1976d2; padding: 5px 10px; margin-right: 8px; text-decoration: none; border-radius: 15px; }
        .footer { background-color: #f5f5f5; padding: 20px; text-align: center; margin-top: 40px; }
        @media (max-width: 768px) {
            .nav { flex-direction: column; display: none; }
            .mobile-nav-btn { display: block; }
            .nav.active { display: flex; }
            h1 { font-size: 24px; }
        }