Desktop-First Responsive QR Code Component(Vanilla CSS and HTML)

Hello, @Leo-yagami!

Your project is looking fantastic!

I'd like to suggest a way to make it even better:

• Using margin isn't always the most effective method for centering an element.

Here's a highly efficient approach to position an element at the center of the page both vertically and horizontally:

📌 Apply this CSS to the body (avoid using position or margins in order to work correctly):

body {
    min-height: 100vh;
    display: flex; 
    justify-content: center;
    align-items: center;
}

I hope you find this helpful!

Keep up the excellent work!

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. Wrap the card in a <main>.

• Always include an alt attribute on images! Decorative images should have empty alt text(alt=""), but this 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 website).

• Headings should always be in order, so you never start with a <h3>. Change it into a <h1>.

• .attribution should be a <footer>, and you should use <p> for the text inside.

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 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;
gap: 2rem;

The gap is used to create space between the main and the footer.

• Remove the width on the card. NB: Don't use % for widths, heights, padding, or margin.

• 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 the height.

• As the design doesn't change, there is no need for any media queries. Also, it is common practice to do mobile styles first and use media queries for larger screens.