sprinkles: Fix types for custom properties passed to defineProperties (#1039)

Author: askoufis

.changeset/quiet-maps-drop.md

@@ -0,0 +1,5 @@
+---
+'@vanilla-extract/sprinkles': patch
+---
+
+Fixes types for custom properties passed to `defineProperties`

packages/sprinkles/src/index.ts

@@ -23,12 +23,19 @@ type Condition = Partial<Record<ConditionKey, string>>;
 
 type BaseConditions = { [conditionName: string]: Condition };
 
-type AtomicProperties = {
+type AtomicCSSProperties = {
   [Property in keyof CSSProperties]?:
     | Record<string, CSSProperties[Property] | Omit<StyleRule, ConditionKey>>
     | ReadonlyArray<CSSProperties[Property]>;
 };
 
+type AtomicCustomProperties = Record<
+  string,
+  Record<string | number, Omit<StyleRule, ConditionKey>>
+>;
+
+type AtomicProperties = AtomicCSSProperties | AtomicCustomProperties;
+
 type ShorthandOptions<
   Properties extends AtomicProperties,
   Shorthands extends { [shorthandName: string]: Array<keyof Properties> },