#at-rule-name-space-after

Require a single space after at-rule names.

@media (max-width: 600px) {}
/**   ↑
 * The space after at-rule names */

#Options

string: "always"|"always-single-line"

#"always"

There must always be a single space after at-rule names.

The following patterns are considered warnings:

@charset"UTF-8";
@media(min-width: 700px) {}
@media  (min-width: 700px) {}
@media 
(min-width: 700px) {}

The following patterns are not considered warnings:

@charset "UTF-8";
@import url("x.css");
@media (min-width: 700px) {}

#"always-single-line"

There must always be a single space after at-rule names in single-line declaration blocks.

The following patterns are considered warnings:

@charset"UTF-8";
@media(min-width: 700px) {}
@media  (min-width: 700px) {}

The following patterns are not considered warnings:

@charset "UTF-8";
@import url("x.css");
@media (min-width: 700px) {}
@media 
(min-width: 700px) {}
@media(min-width: 700px) and
  (orientation: portrait) {}
@media
  (min-width: 700px) and
  (orientation: portrait) {}