responsive units with rem, responsiveness with grid and media query

Your solution is not showing. You need to create a live link to your solution. Also after finishing you need to upload an image of your finished product.

You can create a live page on github, see if you can figure it out if not let me know.

I see that you add the CSS inside the html, don't do this, this is not good practice. Always create an external CSS file and create a link with the html file.