Supports at rule not working

```css
@import "style.css" supports(not (color: color-mix(in srgb, red 0%, red)));
```

Transforms into 

```css
@media supports (not (color: color-mix(in srgb,red 0%,red)))
```

And it should be

```css
@supports (not (color: color-mix(in srgb,red 0%,red)))
```