QR code component project

Some recommendations regarding your code that could be of interest to you.

HTML

In order to fix the accessibility issues:

• You need to replace <div class="wrapper"> with the <main class="wrapper"> tag and <div class="attribution"> with the <footer class="attribution"> tag. You'd better use Semantic HTML, and you can also reach more information about it from Using Semantic HTML Tags Correctly.
• Each main content needs to start with an h1 element. Your accessibility report states page should contain a level-one heading. So, you should use one <h1> element in the <main> tag. You can replace your <h3><b>Improve your front-end skills by building projects</b></h3> element with the <h1><b>Improve your front-end skills by building projects</b></h1> element.

After committing the changes on GitHub and you need to deploy it as a live site. Finally, you should click generate a new report on this solution page to clear the warnings.

CSS

• In order to center the card correctly, you'd better add flexbox and min-height: 100vh to the body
• For the color of the screen, you can use the recommended color in the body

body {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background-color: hsl(212, 45%, 89%);
}

Hope I am helpful. :)