+++ /dev/null
-# at-rule-no-unknown
-
-Disallow unknown at-rules.
-
-```css
- @unknown (max-width: 960px) {}
-/** ↑
- * At-rules like this */
-```
-
-This rule considers at-rules defined in the CSS Specifications, up to and including Editor's Drafts, to be known.
-
-## Options
-
-### `true`
-
-The following patterns are considered violations:
-
-```css
-@unknown {}
-```
-
-The following patterns are *not* considered violations:
-
-```css
-@charset "UTF-8";
-```
-
-```css
-@CHARSET "UTF-8";
-```
-
-```css
-@media (max-width: 960px) {}
-```
-
-```css
-@font-feature-values Font One {
- @styleset {}
-}
-```
-
-## Optional secondary options
-
-### `ignoreAtRules: ["/regex/", "string"]`
-
-Given:
-
-```js
-["/^my-/", "custom"]
-```
-
-The following patterns are *not* considered violations:
-
-```css
-@my-at-rule "x.css";
-```
-
-```css
-@my-other-at-rule {}
-```
-
-```css
-@custom {}
-```