--- /dev/null
+# at-rule-name-space-after
+
+Require a single space after at-rule names.
+
+```css
+@media (max-width: 600px) {}
+/** ↑
+ * The space after at-rule names */
+```
+
+This rule ignores `@import` in Less.
+
+## Options
+
+`string`: `"always"|"always-single-line"`
+
+### `"always"`
+
+There *must always* be a single space after at-rule names.
+
+The following patterns are considered violations:
+
+```css
+@charset"UTF-8";
+```
+
+```css
+@media(min-width: 700px) {}
+```
+
+```css
+@media (min-width: 700px) {}
+```
+
+```css
+@media
+(min-width: 700px) {}
+```
+
+The following patterns are *not* considered violations:
+
+```css
+@charset "UTF-8";
+```
+
+```css
+@import url("x.css");
+```
+
+```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 violations:
+
+```css
+@charset"UTF-8";
+```
+
+```css
+@media(min-width: 700px) {}
+```
+
+```css
+@media (min-width: 700px) {}
+```
+
+The following patterns are *not* considered violations:
+
+```css
+@charset "UTF-8";
+```
+
+```css
+@import url("x.css");
+```
+
+```css
+@media (min-width: 700px) {}
+```
+
+```css
+@media
+(min-width: 700px) {}
+```
+
+```css
+@media(min-width: 700px) and
+ (orientation: portrait) {}
+```
+
+```css
+@media
+ (min-width: 700px) and
+ (orientation: portrait) {}
+```