/**
 * Converts pixel values to rem units
 */
export declare function rem(value: number | string): string;
export { SpacingProps, BaseSystemProps, getSpacingStyles, extractSpacingProps } from './spacing';
export { mergeSlotProps } from './mergeSlotProps';
export { mergeRefs, useMergedRef } from './mergeRefs';
export { UniversalProps, ResponsiveProps, UniversalSystemProps, getUniversalClasses, extractUniversalProps, shouldHideComponent, shouldHideForBreakpoint, useUniversalStyles } from './universal';
export { withUniversalProps, useUniversalProps } from './withUniversalProps';
export { LayoutProps, getLayoutStyles, extractLayoutProps } from './layout';
export { extractShadowProps, getShadowStyles } from './shadow';
export { flipDirection, flipHorizontal, getLogicalProperty, transformRTLStyle, flipAlignment, shouldMirrorIcon, getIconMirrorTransform, swapStartEnd, getWritingDirection, getDefaultTextAlign, mirrorPlacement, reverseArray, DEFAULT_MIRRORABLE_ICONS, } from './rtl';
export { debounce, throttle, measurePerformance, measureAsyncPerformance } from './debounce';
export { INPUT_PERFORMANCE_CONFIG, PERFORMANCE_THRESHOLDS, buildInputComponents } from './performance';
export { calculateOverlayPositionEnhanced, getViewport, measureElement, pointInRect, getScrollPosition, clearOverlayPositionCache } from './positioning-enhanced';
export type { Rect, Viewport, PositionResult, PlacementType, PositioningOptions } from './positioning-enhanced';
/**
 * Converts values to px
 */
export declare function px(value: string | number): number;
/**
 * Gets a size value from theme or returns the value if it's a string
 */
export declare function getSize(size: string | number | undefined, prefix: string, theme?: any): string | undefined;
/**
 * Gets font size value
 */
export declare function getFontSize(size: string | undefined): string | undefined;
/**
 * Gets radius value
 */
export declare function getRadius(radius: string | number | undefined): string | undefined;
/**
 * Gets shadow value
 */
export declare function getShadow(shadow: string | undefined): string | undefined;
/**
 * Gets color value from theme
 */
export declare function getColor(color: string | undefined, shade?: number | string): string | undefined;