/**
 * CSS Scoping Service
 *
 * Provides utilities for generating unique scope identifiers and scoping CSS
 * to prevent style conflicts between different email templates.
 */
export interface ScopedResult {
    scopeId: string;
    scopedCSS: string;
    wrappedHTML: string;
}
export declare class CSSScopingService {
    /**
     * Generate a unique scope identifier using timestamp and random string
     * Format: email-tpl-{timestamp}-{random}
     */
    generateScopeId(): string;
    /**
     * Scope CSS selectors by prefixing them with the scope identifier
     * Skips :root and :host pseudo-classes
     *
     * @param css - The CSS stylesheet to scope
     * @param scopeId - The unique scope identifier
     * @returns Scoped CSS with prefixed selectors
     */
    scopeCSS(css: string, scopeId: string): string;
    /**
     * Parse CSS into individual rules
     * Simple parser that handles basic CSS syntax
     */
    private parseCSS;
    /**
     * Scope a single CSS rule
     */
    private scopeRule;
    /**
     * Scope a single selector
     * Skip :root, :host, and other pseudo-classes that shouldn't be scoped
     */
    private scopeSelector;
    /**
     * Wrap HTML content with a scope wrapper div
     *
     * @param html - The HTML content to wrap
     * @param scopeId - The unique scope identifier
     * @returns HTML wrapped with scope div
     */
    wrapHTMLWithScope(html: string, scopeId: string): string;
    /**
     * Extract inline styles from HTML elements
     * Returns a map of element identifiers to their inline styles
     */
    extractInlineStyles(html: string): Map<string, Record<string, string>>;
    /**
     * Parse inline style attribute into an object
     */
    private parseInlineStyles;
    /**
     * Merge two style objects, with override taking precedence
     */
    mergeStyles(base: Record<string, string>, override: Record<string, string>): Record<string, string>;
    /**
     * Complete scoping workflow: generate scope ID, scope CSS, and wrap HTML
     *
     * @param html - The HTML content
     * @param css - The CSS stylesheet
     * @returns Object containing scopeId, scopedCSS, and wrappedHTML
     */
    scopeTemplate(html: string, css?: string): ScopedResult;
}
export declare const cssScopingService: CSSScopingService;