Responsive QR Code Card using basic HTML, CSS

HTML:

• Remove the empty ````, and its text must be wrapped in a <p>.

CSS:

• It's good practice to include a CSS Reset at the top.

• Remove height: 100% on html and body.

• Remove display and margin on html.

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

• Remove display, vertical-align and margin from body.

• Remove display: block on the card. It is a block element by default.

• 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 the width on the card.

• 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.

• Since all of the text should be centered, you only need to set text-align: center on the body, and remove it elsewhere. The children will inherit the value.

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

• Remove #new-ft:hover, as you don't have any elements with that ID in your HTML.