CSS @import Rule
The @import CSS at-rule is used to import style rules from other style sheets. These rules must precede all other types of rules, except @charset rules; as it is not a nested statement, @import cannot be used inside conditional group at-rules. @import.
How to use @import
You can use @import rule in following ways:
A. With internal style tag
B. With external stylesheet
The following line imports a CSS file named additional-styles.css in the root directory into the CSS file in which it appears:
Importing external CSS is also possible. A common use case are font files.