I’m a beginner, I write styles in css, and lines of code with pseudo-elements and media queries are colored gray, as if it’s an error or an inactive file.enter a description of the image here

I double-checked, there are no errors. And the code works as it should according to the task. I created the same css, but in a different folder – and everything is fine with the colors. But if you reschedule index.html (even empty) – the same lines of code will be colored gray.
I also noticed that if there is no this class, that I already have lines of code with selectors colored gray.
But how can this be disabled for pseudo-elements and media queries? And I need it to be colored as before according to my settings already. Pseudo-elements with selectors are purple, and media queries are red

p.s – there was no such thing in another project and there is still no such thing