import * as React from 'react';
export interface ButtonProps extends React.ButtonHTMLAttributes<HTMLButtonElement> {
    /** Visual variant */
    variant?: 'primary' | 'secondary' | 'outline' | 'ghost' | 'danger';
    /** Size variant */
    size?: 'sm' | 'md' | 'lg';
    /** Loading state - shows spinner, disables interaction */
    loading?: boolean;
    /** Full width button */
    fullWidth?: boolean;
    /** Button content */
    children: React.ReactNode;
}
/**
 * Button - Foundation interactive element
 *
 * Accessible by default with keyboard support, focus states, and ARIA attributes.
 * Variants provide semantic meaning while maintaining visual consistency.
 */
export declare const Button: React.ForwardRefExoticComponent<ButtonProps & React.RefAttributes<HTMLButtonElement>>;
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