/**
 * Safe evaluator for static theme values with support for:
 * - rem() from polished
 * - clsx() for combining values
 * - Template literals with expressions
 * - Basic arithmetic
 */
export declare class ValueEvaluator {
    private remBase;
    constructor(remBase?: number);
    /**
     * Evaluate a string expression to a concrete value
     */
    evaluate(expression: string): string | null;
    /**
     * Evaluate an AST node
     */
    private evaluateNode;
    /**
     * Evaluate a template literal
     */
    private evaluateTemplateLiteral;
    /**
     * Evaluate a call expression (rem, clsx, etc.)
     */
    private evaluateCallExpression;
    /**
     * Evaluate rem() function from polished
     */
    private evaluateRem;
    /**
     * Evaluate clsx() function
     */
    private evaluateClsx;
    /**
     * Evaluate binary expression (mainly for string concatenation)
     */
    private evaluateBinaryExpression;
    /**
     * Set rem base for evaluation
     */
    setRemBase(base: number): void;
}