body { font-family: 'Arial', sans-serif; line-height: 1.6; color: #333; max-width: 1200px; margin: 0 auto; padding: 20px; }
        .logo { font-size: 28px; font-weight: bold; color: #ff6b35; text-shadow: 2px 2px 4px rgba(0,0,0,0.1); }
        nav { background: #1a237e; padding: 15px; border-radius: 5px; margin-bottom: 20px; }
        nav a { color: white; margin: 0 15px; text-decoration: none; }
        .mobile-nav-btn { display: none; background: #ff6b35; color: white; border: none; padding: 10px; border-radius: 5px; }
        h1 { color: #1a237e; border-bottom: 2px solid #ff6b35; padding-bottom: 10px; }
        h2 { color: #3949ab; margin-top: 30px; }
        h3 { color: #5c6bc0; }
        .download-btn, .login-btn { background: #ff6b35; color: white; padding: 12px 25px; border: none; border-radius: 5px; margin: 15px 0; font-size: 16px; cursor: pointer; }
        .download-btn:hover, .login-btn:hover { background: #f4511e; }
        img { max-width: 100%; height: auto; border-radius: 8px; margin: 20px 0; }
        .tags { margin: 20px 0; }
        .tag { background: #e8eaf6; padding: 5px 10px; border-radius: 15px; margin: 5px; display: inline-block; }
        footer { margin-top: 40px; padding: 20px; background: #1a237e; color: white; border-radius: 5px; }
        @media (max-width: 768px) {
            .mobile-nav-btn { display: block; }
            nav { display: none; }
            nav.active { display: block; }
            nav a { display: block; margin: 10px 0; }
        }