/**
 * Layer 2: Layout Optimization Engine
 * Smart layout selection based on content type and design patterns
 */
export interface LayoutPattern {
    name: string;
    grid_system: '12-column' | '8-column' | 'flexbox' | 'css-grid';
    visual_hierarchy: 'Z-pattern' | 'F-pattern' | 'center-focused' | 'left-aligned';
    layout_type: 'hero' | 'split' | 'grid' | 'timeline' | 'comparison' | 'process_flow';
    responsive_breakpoints: string[];
    best_for: string[];
}
export interface LayoutRecommendation {
    pattern: LayoutPattern;
    confidence_score: number;
    accessibility_score: number;
    reason: string;
    css_framework: string;
}
export declare class LayoutOptimizationEngine {
    private static layouts;
    /**
     * Recommend optimal layout based on content analysis
     */
    static recommendLayout(slideType: string, contentDensity: 'low' | 'medium' | 'high', audience: string, hasVisuals?: boolean): LayoutRecommendation;
    /**
     * Calculate accessibility score for layout
     */
    private static calculateAccessibilityScore;
    /**
     * Generate CSS framework code for layout
     */
    private static generateCSSFramework;
    /**
     * Generate responsive breakpoints
     */
    static generateResponsiveCSS(layout: LayoutPattern): string;
}