QR Code component with basic HTML and CSS

Hi zanfa97 great job on completing your first challenge, here are some suggestions to make it better

• All content should be wrapped within landmarks. Wrap a main tag around the card and a footer for the attribution.
• To get the card properly centered add this on your body

   display: flex;
   flex-direction: column;
   align-items: center;
   justify-content: center;
   min-height: 100vh; 

• Font-size should be defined in rem.
• Avoid setting fixed heights and widths on elements as this will cause lots of issues with the responsiveness of your layout, the element's content and using padding should determine it's size. Use max-width or min-height if you absolutely have to and the units should be relative units like rem.
• Consider using a modern CSS reset at the start of the styles in every project. Like this one Modern CSS Reset.

Hope this helps