Your estimated biological age is ${Math.abs(ageDifference)} years ${diffText}

`; downloadPdfBtn.disabled = false; }; const generatePdf = () => { const chronoAge = getNumericValue('chrono-age'); if (chronoAge === 0) return; // --- Populate PDF Content --- document.getElementById('pdf-report-date').textContent = new Date().toLocaleDateString('en-US', { year: 'numeric', month: 'long', day: 'numeric' }); document.getElementById('pdf-chrono-age').textContent = chronoAge; let ageModifier = 0; let recommendations = []; // Diet const dietVal = getNumericValue('diet'); ageModifier += dietVal; if (dietVal > 0) recommendations.push({ text: 'Your diet may be adding years. Focus on whole foods, fruits, and vegetables.', impact: 'High' }); // Smoking const smokingVal = getNumericValue('smoking'); ageModifier += smokingVal; if (smokingVal > 0) recommendations.push({ text: 'Smoking significantly increases biological age. Quitting is the most impactful change you can make.', impact: 'Very High' }); // Alcohol const alcoholVal = getNumericValue('alcohol'); ageModifier += alcoholVal; if (alcoholVal > 0) recommendations.push({ text: 'High alcohol consumption accelerates aging. Consider reducing your intake.', impact: 'Medium' }); // Sleep const sleepVal = getNumericValue('sleep'); ageModifier += sleepVal; if (sleepVal > 0) recommendations.push({ text: 'Inadequate sleep is detrimental. Aim for 7-8 hours of quality sleep per night.', impact: 'High' }); // Exercise const exerciseDays = getNumericValue('exercise'); if (exerciseDays >= 5) ageModifier -= 3; else if (exerciseDays >= 3) ageModifier -= 2; else if (exerciseDays >= 1) ageModifier -= 1; else ageModifier += 2; if (exerciseDays < 3) recommendations.push({ text: 'Regular physical activity is key to youthfulness. Aim for at least 3-5 days of exercise per week.', impact: 'High' }); // Stress const stressVal = getNumericValue('stress'); ageModifier += stressVal; if (stressVal > 1) recommendations.push({ text: 'Chronic stress contributes to aging. Incorporate stress-management techniques like mindfulness or yoga.', impact: 'Medium' }); // Biomarkers const bp = getNumericValue('bp'); if (bp > 130) { ageModifier += (bp > 140 ? 3 : 1); recommendations.push({ text: 'Your blood pressure is elevated. Consult a doctor to manage it.', impact: 'High' }); } const glucose = getNumericValue('glucose'); if (glucose > 100) { ageModifier += (glucose > 125 ? 4 : 2); recommendations.push({ text: 'Your fasting glucose is high, a key aging factor. Discuss with your doctor.', impact: 'High' }); } const cholesterol = getNumericValue('cholesterol'); if (cholesterol > 200) { ageModifier += (cholesterol > 240 ? 3 : 1); recommendations.push({ text: 'Elevated cholesterol can impact vascular age. Lifestyle and medical management can help.', impact: 'Medium' }); } const crp = getNumericValue('crp'); if (crp > 1) { ageModifier += (crp > 3 ? 3 : 1); recommendations.push({ text: 'Your inflammation marker (hs-CRP) is high. Reducing inflammation is crucial for healthy aging.', impact: 'High' }); } const biologicalAge = Math.round(chronoAge + ageModifier); const ageDifference = biologicalAge - chronoAge; let diffColor; if (ageDifference < 0) diffColor = 'text-green-600 bg-green-100 border-green-500'; else if (ageDifference === 0) diffColor = 'text-blue-600 bg-blue-100 border-blue-500'; else diffColor = 'text-red-600 bg-red-100 border-red-500'; document.getElementById('pdf-bio-age').textContent = biologicalAge; document.getElementById('pdf-bio-age-container').className = `text-center p-4 rounded-lg border-2 ${diffColor}`; const recommendationsEl = document.getElementById('pdf-recommendations'); if (recommendations.length > 0) { recommendationsEl.innerHTML = recommendations.map(rec => ``).join(''); } else { recommendationsEl.innerHTML = ``; } // --- Generate PDF --- document.body.classList.add('pdf-generating'); setTimeout(() => { const { jsPDF } = window.jspdf; const pdf = new jsPDF({ orientation: 'p', unit: 'mm', format: 'a4' }); html2canvas(document.getElementById('pdf-report'), { scale: 3, useCORS: true, backgroundColor: '#ffffff' }) .then(canvas => { const imgData = canvas.toDataURL('image/png'); const pdfWidth = pdf.internal.pageSize.getWidth(); const pdfHeight = (canvas.height * pdfWidth) / canvas.width; pdf.addImage(imgData, 'PNG', 0, 0, pdfWidth, pdfHeight); pdf.save('Biological-Age-Report.pdf'); document.body.classList.remove('pdf-generating'); }).catch(err => { console.error("PDF Generation Error:", err); document.body.classList.remove('pdf-generating'); }); }, 100); }; // --- Event Listeners (Declared after functions) --- tabs.forEach(tab => tab.addEventListener('click', () => switchTab(parseInt(tab.dataset.tab)))); prevBtn.addEventListener('click', () => { if (currentTab > 1) switchTab(currentTab - 1); }); nextBtn.addEventListener('click', () => { if (currentTab < 4) switchTab(currentTab + 1); }); exerciseSlider.addEventListener('input', (e) => { exerciseValue.textContent = e.target.value; }); downloadPdfBtn.addEventListener('click', generatePdf); // --- Initialization --- switchTab(1); });