 {
            e.preventDefault();
            
            const email = document.getElementById('email').value;
            const preferences = Array.from(document.querySelectorAll('input[name="preferences"]:checked')).map(cb => cb.value);
            const responseDiv = document.getElementById('response');
            
            // Show loading state
            responseDiv.style.display = 'block';
            responseDiv.textContent = 'Processing your subscription...';
            responseDiv.classNam