Printing Guidelines:

• Size: Standard business card (3.5" x 2" / 88.9mm x 50.8mm)
• Paper: 300-350 GSM cardstock recommended
• Finish: Matte or glossy (matte recommended for professional look)
• Print: Use browser print function (Ctrl/Cmd + P)
• Settings: Set to actual size, no margins, landscape orientation
• QR Code: Generate using qrcode.js library (automatically loaded)

How to Generate QR Code:

1. Open this file in a web browser
2. QR code will automatically generate linking to: https://duyng-portfolio.com/docs/index_portfolio.html
3. Right-click on the cards below and select "Print" or use Ctrl/Cmd + P
4. Ensure "Background graphics" is enabled in print settings