${minSize} - ${maxSize} Liters

${description}

`; resultsContainer.classList.remove('hidden'); resultsContainer.scrollIntoView({ behavior: 'smooth' }); }; /** * Generates and downloads a well-formatted PDF of the results summary. */ const downloadPdf = () => { try { const { jsPDF } = window.jspdf; const doc = new jsPDF({ orientation: 'portrait', unit: 'pt', format: 'a4' }); const pageHeight = doc.internal.pageSize.getHeight(); const margin = 50; let y = margin; const addText = (text, options) => { const fontSize = options.fontSize || 10; const lineHeight = fontSize * 1.2; doc.setFont(options.font || 'helvetica', options.fontStyle || 'normal'); doc.setFontSize(fontSize); if (options.color) doc.setTextColor(options.color[0], options.color[1], options.color[2]); const lines = doc.splitTextToSize(text, doc.internal.pageSize.getWidth() - margin * 2); if (y + (lines.length * lineHeight) > pageHeight - margin) { doc.addPage(); y = margin; } doc.text(lines, margin, y); y += (lines.length * lineHeight) + (options.marginBottom || 0); }; // --- PDF Content --- addText('Your Travel Backpack Calculation Summary', { fontSize: 18, fontStyle: 'bold', marginBottom: 30 }); // Inputs Summary addText('Your Trip Details', { fontSize: 14, fontStyle: 'bold', color: [79, 70, 229], marginBottom: 10 }); const travelStyle = document.querySelector('input[name="travel-style"]:checked').value; const climate = document.querySelector('input[name="climate"]:checked').value; const activities = [...document.querySelectorAll('input[name="activities"]:checked')].map(el => el.labels[0].textContent).join(', ') || 'None specified'; addText(`Duration: ${durationValue.textContent}`, { fontSize: 11, marginBottom: 8 }); addText(`Travel Style: ${travelStyle.charAt(0).toUpperCase() + travelStyle.slice(1)}`, { fontSize: 11, marginBottom: 8 }); addText(`Climate: ${climate.charAt(0).toUpperCase() + climate.slice(1)}`, { fontSize: 11, marginBottom: 8 }); addText(`Activities: ${activities}`, { fontSize: 11, marginBottom: 25 }); // Result addText('Recommended Backpack Size', { fontSize: 14, fontStyle: 'bold', color: [79, 70, 229], marginBottom: 10 }); const resultText = resultOutput.querySelector('p:first-child').innerText; const descriptionText = resultOutput.querySelector('p:last-child').innerText; addText(resultText, { fontSize: 24, fontStyle: 'bold', marginBottom: 10 }); addText(descriptionText, { fontSize: 11, fontStyle: 'italic', color: [100, 116, 139] }); doc.save('Backpack-Size-Recommendation.pdf'); } catch (error) { console.error("PDF Generation Error:", error); } }; // IV.A.2: Attach primary event listeners durationSlider.addEventListener('input', updateDurationDisplay); calculateBtn.addEventListener('click', calculateBackpackSize); pdfDownloadBtn.addEventListener('click', downloadPdf); // Initial setup updateDurationDisplay(); });