Assessment wanted for CSS - WebDev-Biography

I completed the following assessment: https://developer.mozilla.org/en-US/docs/Learn/CSS/First_steps/Using_your_new_knowledge

Here’s my code:
html: https://github.com/Toshu/MDN-Kurs-FrontendDeveloper/blob/master/CSS/index.html
css: https://github.com/Toshu/MDN-Kurs-FrontendDeveloper/blob/master/CSS/styles.css

(I hope it’s okay to use a github-repo)

Please review it. Thanks.