QR code component

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 the "main" section of a page. Replace <section> with a <main>.

• The image has meaning, so it must have proper alt text. Write something short and descriptive, without including words like "image" or "photo". Screen readers start announcing images with "image", so an alt text of "image of qr code" would be read like this: "image, image of qr code". The alt text must also say where it leads(frontendmentor.io).

• Headings should always be in order, so you never start with a <h4>. Change it into a <h1>.

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.

• Remove the margin on main.

• Remove the margin on the card.

• To center the card horizontally and vertically, use Flexbox on the body:

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

• Remove all widths. And you should NOT use !important.

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

• Use numbers as values for font-weight.

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

• You do NOT need all those media queries! The layout of this component doesn't change, so you do not need ANY media queries. When they are needed, you should use rem instead of px. It is also common to do mobile styles as the default and use media queries for larger screens.