body { font-family: 'Arial', sans-serif; line-height: 1.6; max-width: 1200px; margin: 0 auto; padding: 20px; color: #333; }
        h1, h2, h3 { color: #d9534f; margin: 25px 0 15px; }
        h1 { font-size: 2.2em; border-bottom: 2px solid #f0ad4e; }
        h2 { font-size: 1.8em; }
        h3 { font-size: 1.5em; }
        .nav { background: #5cb85c; padding: 15px; position: relative; }
        .nav-toggle { display: none; }
        .nav-links { display: flex; justify-content: space-around; }
        .mobile-nav { display: none; }
        @media (max-width: 768px) {
            .nav-links { display: none; }
            .nav-toggle { display: block; position: absolute; right: 20px; top: 15px; }
            .mobile-nav.active { display: block; }
        }
        .btn { display: inline-block; background: #337ab7; color: white; padding: 10px 20px; margin: 10px 0; border-radius: 5px; text-decoration: none; }
        .download-btn { background: #5bc0de; }
        .login-btn { background: #d9534f; }
        img { max-width: 100%; height: auto; margin: 20px 0; }
        .footer { margin-top: 40px; padding-top: 20px; border-top: 1px solid #eee; }
        .tags { margin: 20px 0; }
        .tag { background: #f0ad4e; color: white; padding: 5px 10px; margin: 5px; display: inline-block; border-radius: 3px; }