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` : ''} `; downloadBtn.style.display = 'inline-block'; }; window.downloadPdf = function() { if (typeof window.jspdf === 'undefined') { alert('PDF library is not loaded. Please wait and try again.'); return; } const { jsPDF } = window.jspdf; const doc = new jsPDF(); doc.setFontSize(18); doc.setTextColor('#004d66'); doc.text('Protein Molecular Weight Report', 14, 20); doc.setFontSize(12); doc.setTextColor('#1a1a1a'); doc.text('Calculation Summary:', 14, 30); const mwText = mwValue.textContent || ''; const detailsHTML = details.innerHTML || ''; const parser = new DOMParser(); const detailsDoc = parser.parseFromString(detailsHTML, 'text/html'); const listItems = detailsDoc.querySelectorAll('li'); const paragraph = detailsDoc.querySelector('p'); doc.setFontSize(14); doc.text(mwText, 14, 40); doc.setFontSize(12); let y = 50; listItems.forEach(li => { doc.text(`- ${li.textContent}`, 16, y); y += 8; }); if (paragraph) { y += 8; doc.text(paragraph.textContent, 14, y); } const dateStr = new Date().toLocaleString(); doc.setFontSize(9); doc.setTextColor('#555'); doc.text(`Report generated on: ${dateStr}`, 14, 280); doc.save('Protein_Molecular_Weight_Report.pdf'); }; // Load jsPDF dynamically (function loadJsPdf(){ if (window.jspdf) return; const script = document.createElement('script'); script.src = 'https://cdnjs.cloudflare.com/ajax/libs/jspdf/2.5.1/jspdf.umd.min.js'; script.onload = function() {}; document.head.appendChild(script); })(); });