Responsive QR Code

HTML:

• Every webpage needs a <main> that wraps all of the content, except for <header> and footer>. This is vital for accessibility, as it helps screen readers identify a page's "main" section. Change .container into a <main>.

• The alt text must also say where it leads(frontendmentor website). A good alt text would be "QR code leading to the Frontend Mentor website."

• As this is a card heading, it would probably not be the main heading on a webpage. Hence, I would change it to a <h2>.

CSS:

• I'm not sure how much normalize.css is used nowadays. I like to use this CSS reset from Andy Bell.

• You don't need the .clear or .clearfix, so remove those.

• I like to add 1rem of padding on the body, to ensure the card doesn't touch the edges on small screens.

• I would remove the margin on the card, and center the card horizontally using Flexbox. Add justify-content on .container. height should be min-height - we never want to limit the height of text elements, as that would cause overflow if we have enough text.

• Remove all widths.

• 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.

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

• To create the space between the image and the edge of the card, set padding on all 4 sides of the card:padding: 1rem.