AtRule.CounterStyle
interface CounterStyle <TLength = (string & {}) | 0, TTime = string & {}> {
additiveSymbols?: string | undefined;
fallback?: string | undefined;
negative?: string | undefined;
pad?: string | undefined;
prefix?: string | undefined;
range?: Range | undefined;
speakAs?: SpeakAs | undefined;
suffix?: string | undefined;
symbols?: string | undefined;
system?: System | undefined;
}