body { font-family: 'Arial', sans-serif; line-height: 1.6; color: #333; max-width: 1200px; margin: 0 auto; padding: 20px; }
        h1, h2, h3 { color: #e67e22; }
        h1 { font-size: 2.5em; }
        h2 { font-size: 1.8em; margin-top: 30px; }
        h3 { font-size: 1.4em; margin-top: 25px; }
        .logo { font-size: 2em; font-weight: bold; color: #e74c3c; text-align: center; margin: 20px 0; }
        nav { background: #f8f9fa; padding: 10px; display: flex; justify-content: space-around; flex-wrap: wrap; }
        nav a { text-decoration: none; color: #3498db; font-weight: bold; padding: 5px 10px; }
        .mobile-nav-btn { display: none; background: #e74c3c; color: white; border: none; padding: 10px; cursor: pointer; }
        .content { margin-top: 30px; }
        .download-btn, .login-btn { display: inline-block; padding: 15px 30px; background: #2ecc71; color: white; text-decoration: none; margin: 20px 0; border-radius: 5px; font-weight: bold; }
        .login-btn { background: #3498db; }
        img { max-width: 100%; height: auto; margin: 20px 0; }
        .tags { margin: 20px 0; }
        .tags a { background: #f1f1f1; padding: 5px 10px; margin: 0 5px; text-decoration: none; color: #333; border-radius: 3px; }
        footer { margin-top: 50px; padding: 20px; background: #f8f9fa; text-align: center; }
        @media (max-width: 768px) {
            .mobile-nav-btn { display: block; }
            nav { display: none; flex-direction: column; }
            nav.active { display: flex; }
            h1 { font-size: 2em; }
        }