Hi Carlos,
Well done!
According to your question, the circles are a bit tricky in this challenge. I have used pseudo-elements, position absolute, vw and vh, background url, transform translate and @media (in your solution they are not very stable on different devices). Also, you can add better box-shadow, fix the HTML issue by adding the h1 tag to the section. Generally semantic tags matter, divs are semantically inert elements — elements that don’t really do or say anything.
That's it from me. Ps. Don't forget to upvote any comments on here that you find helpful.
Greetings :D
P