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# at-rule-name-case
Specify lowercase or uppercase for at-rules names.
```css
@media (min-width: 10px) {}
/** ↑
* These at-rule names */
```
Only lowercase at-rule names are valid in SCSS.
## Options
`string`: `"lower"|"upper"`
### `"lower"`
The following patterns are considered warnings:
```css
@Charset 'UTF-8';
```
```css
@cHarSeT 'UTF-8';
```
```css
@CHARSET 'UTF-8';
```
```css
@Media (min-width: 50em) {}
```
```css
@mEdIa (min-width: 50em) {}
```
```css
@MEDIA (min-width: 50em) {}
```
The following patterns are *not* considered warnings:
```css
@charset 'UTF-8';
```
```css
@media (min-width: 50em) {}
```
### `"upper"`
The following patterns are considered warnings:
```css
@Charset 'UTF-8';
```
```css
@cHarSeT 'UTF-8';
```
```css
@charset 'UTF-8';
```
```css
@Media (min-width: 50em) {}
```
```css
@mEdIa (min-width: 50em) {}
```
```css
@media (min-width: 50em) {}
```
The following patterns are *not* considered warnings:
```css
@CHARSET 'UTF-8';
```
```css
@MEDIA (min-width: 50em) {}
```