type Maybe<T> = NonNullable<T> | undefined;
type LowercaseCharacter = "a" | "b" | "c" | "d" | "e" | "f" | "g" | "h" | "i" | "j" | "k" | "l" | "m" | "n" | "o" | "p" | "q" | "r" | "s" | "t" | "u" | "v" | "w" | "x" | "y" | "z";
type AllCharacter = LowercaseCharacter | Uppercase<LowercaseCharacter>;
type NonEmptyString = `${AllCharacter}${string}`;
type CSSLengthUnit = `${number}${LengthUnit}`;
type CSSCustomProperty = `--${NonEmptyString}`;
type CSSCustomPropertyWithVar = `var(${CSSCustomProperty})`;
type LengthUnit = "vmin" | "vmax" | "vh" | "vw" | "%" | "ch" | "ex" | "em" | "rem" | "in" | "cm" | "mm" | "pt" | "pc" | "px";
type CSSSizeKeyword = "auto" | "inherit" | "none" | "min-content" | "max-content" | "fit-content";
export type CSSLength = CSSLengthUnit | CSSCustomPropertyWithVar | CSSCustomProperty | CSSSizeKeyword;
export declare const spacing: {
    readonly size000: "-.5rem";
    readonly size00: "-.25rem";
    readonly size1: ".25rem";
    readonly size2: ".5rem";
    readonly size3: "1rem";
    readonly size4: "1.25rem";
    readonly size5: "1.5rem";
    readonly size6: "1.75rem";
    readonly size7: "2rem";
    readonly size8: "3rem";
    readonly size9: "4rem";
    readonly size10: "5rem";
    readonly size11: "7.5rem";
    readonly size12: "10rem";
    readonly size13: "15rem";
    readonly size14: "20rem";
    readonly size15: "30rem";
};
export declare const sizes: {
    readonly sizeContent1: "20ch";
    readonly sizeContent2: "45ch";
    readonly sizeContent3: "60ch";
    readonly sizeHeader1: "20ch";
    readonly sizeHeader2: "25ch";
    readonly sizeHeader3: "35ch";
    readonly sizeXxs: "240px";
    readonly sizeXs: "360px";
    readonly sizeSm: "480px";
    readonly sizeMd: "768px";
    readonly sizeLg: "1024px";
    readonly sizeXl: "1440px";
    readonly sizeXxl: "1920px";
};
type PropertyResult<TvalidProp, TinvalidProp> = {
    result: "valid";
    property: TvalidProp;
} | {
    result: "invalid";
    property: TinvalidProp;
};
type PropertyCheckFunction<T, K> = (property: K) => PropertyResult<T, K>;
export declare const checkIsCSSCustomProperty: PropertyCheckFunction<`--a${string}` | `--b${string}` | `--c${string}` | `--d${string}` | `--e${string}` | `--f${string}` | `--g${string}` | `--h${string}` | `--i${string}` | `--j${string}` | `--k${string}` | `--l${string}` | `--m${string}` | `--n${string}` | `--o${string}` | `--p${string}` | `--q${string}` | `--r${string}` | `--s${string}` | `--t${string}` | `--u${string}` | `--v${string}` | `--w${string}` | `--x${string}` | `--y${string}` | `--z${string}` | `--A${string}` | `--B${string}` | `--C${string}` | `--D${string}` | `--E${string}` | `--F${string}` | `--G${string}` | `--H${string}` | `--I${string}` | `--J${string}` | `--K${string}` | `--L${string}` | `--M${string}` | `--N${string}` | `--O${string}` | `--P${string}` | `--Q${string}` | `--R${string}` | `--S${string}` | `--T${string}` | `--U${string}` | `--V${string}` | `--W${string}` | `--X${string}` | `--Y${string}` | `--Z${string}`, string>;
export declare const checkIsCSSLength: PropertyCheckFunction<CSSLength, unknown>;
export type SpacingOptions = keyof typeof spacing;
export type SizesOptions = keyof typeof sizes;
export declare function createAttributeString(prefix: string, value: string | number | undefined): string | undefined;
export declare function getSpacingValue(spacingKey: SpacingOptions): Maybe<CSSLength>;
export type Gutter = CSSLength | number | SpacingOptions;
export declare function getSafeGutter(gutter?: Gutter): Maybe<CSSLength>;
export declare function getSizeValue(sizeKey?: string | number): Maybe<CSSLength>;
/**
 * Type for padding configuration. Can be a single value or an object with specific padding sides.
 */
export type PaddingConfig = SpacingOptions | CSSLength | number | {
    all?: SpacingOptions | CSSLength | number;
    inline?: SpacingOptions | CSSLength | number;
    inlineStart?: SpacingOptions | CSSLength | number;
    inlineEnd?: SpacingOptions | CSSLength | number;
    block?: SpacingOptions | CSSLength | number;
    blockStart?: SpacingOptions | CSSLength | number;
    blockEnd?: SpacingOptions | CSSLength | number;
};
/**
 * Helper function to convert PaddingConfig to data attribute strings
 */
export declare function getPaddingAttributes(padding?: Readonly<PaddingConfig>): readonly string[];
export {};