How to import the contents of a .css file and not a link to it?

Question

Sass

Good afternoon, colleagues.
I have the following task: I need to connect jquery.formStylerModern.css to the project.
The structure is this:

I do it through @importthe sass file sass/libs.sass:
@import "../libs/jquery.formStylerModern.css"
Import happened:
@import url(../libs/jquery.formStylerModern.css);
But damn it, this shouldn't happen. All styles from jquery.formStylerModern.css should be imported, not just
@import url(../libs/jquery.formStylerModern.css);
I tried different ways, but only
@import "../libs/jquery.formStylerModern.css"
this one works. @import "/app/libs/jquery.formStylerModern.css"
Many thanks in advance for your help!

Answer 1

.css remove

Answer 2

rename css to scss