QR code component

HTML:

• Nothing to be said here - well done!

CSS:

• Including a CSS Reset at the top is good practice.

• Add around 1rem of padding on the body, so the card doesn't touch the edges on small screens.

• Instead of 0px, just write 0.

• You don't need to write .container before every selector.

• On the body, change height to min-height - this way, the content will not get cut off if it grows beneath the viewport.

• Remove all widths and heights. In general, you should (almost) never set fixed sizes.

• Add a max-width of around 20rem on the card, to prevent it from getting too wide on larger screens.

• font-size must never be in px. This is a big accessibility issue, as it prevents the font size from scaling with the user's default setting in the browser. Use rem instead.

• Paragraphs have a default value of font-weight: 400, so there is no need to declare it.

• On the image, add display: block and max-width: 100% - the max-width prevents it from overflowing its container.