FreeCodeCamp does not detect media query&flex box

I have made my product landing page, but the FreeCode site doesn’t detect flex boxes and media queries, but if my site is opened from Chrome browser it works fine and all 16 requests are made
My work

have you linked the CSS file to the HTML?

The new Responsive Web Design curriculum content has been released.

FAQ:
5) How do I use the new editor?

  • The new editor is as close to an external text editor as we wanted to get it. If the files for the challenge have been enabled, you can access the index.html and styles.css tabs which you should use for the respective code.
  • Two main differences between this editor and other online editors:
    • You need to link your styles.css file to your HTML (just like you would in real web-development), by adding the following line to the head of your HTML:
<link href="styles.css" />
    • You are encouraged to include the DOCTYPE, html, head and body tags for each project.

I did that, it didn’t work(wrote <link rel="stylesheet" href="style.css">), but I copied your segment of code and it works. Thank You very much

you are missing a letter here, that’s why it is not working

I didn’t observe. TY very much