AtRules
type AtRules =
| "@charset"
| "@counter-style"
| "@document"
| "@font-face"
| "@font-feature-values"
| "@font-palette-values"
| "@import"
| "@keyframes"
| "@layer"
| "@media"
| "@namespace"
| "@page"
| "@property"
| "@scroll-timeline"
| "@supports"
| "@viewport";