Responsive QR page using flexbox

What are you most proud of, and what would you do differently next time?

1.simple design and yet this is exactly what most website should be

What challenges did you encounter, and how did you overcome them?

1.there is problem about using google font, looks like it didnt work, i use back up font like ariel, sans-serif

What specific areas of your project would you like help with?

1.css code review, it can be more less and tidy than what i write