Import multiple css file into single file

How importing allows to import one style sheet into another.

for example you are linked many external css files in your project as

<link rel="stylesheet" type="text/css" href="/css/reset.css"/>
<link rel="stylesheet" type="text/css" href="/css/style.css"/>
<link rel="stylesheet" type="text/css" href="/css/datatables.css"/>

Now put all css file in one css.
Create one new css file (e.g. bundle.css), now call all css in to this file.

@import url('/css/reset.css');
@import url('/css/style.css');
@import url('/css/datatables.css');

Now bundle.css file call in your project.

<link rel="stylesheet" type="text/css" href="/css/bundle.css"/>