private function minify_assets($html) {
        $this->write_log("🗜️ Starte Asset-Minifizierung");
        
        $minified_external_css = 0;
        $minified_external_js = 0;
        $minified_inline_css = 0;
        $minified_inline_js = 0;
        $total_css_saved = 0;
        $total_js_saved = 0;
        
        // CSS minifizieren (extern)
        $this->write_log("📄 Minifiziere externe CSS-Dateien");
        $html = preg_replace_callback(
            '/<link[^>]*href=["\']([^"\']+\.css[^"\']*)["\'][^>]*>/i',
            function($matches) use (&$minified_external_css, &$total_css_saved) {
                $url = $matches[1];
                $this->write_log("🔗 Prüfe CSS-Datei: $url");
                
                $minified_url = $this->minify_css_file($url);
                
                if ($minified_url) {
                    $minified_external_css++;
                    $this->write_log("✅ CSS minifiziert: " . basename($url));
                    return str_replace($url, $minified_url, $matches[0]);
                } else {
                    $this->write_log("⚠️ CSS nicht minifiziert: " . basename($url));
                }
                
                return $matches[0];
            },
            $html
        );
        
        // Inline CSS minifizieren
        $this->write_log("📝 Minifiziere Inline CSS");
        $html = preg_replace_callback(
            '/<style[^>]*>(.*?)<\/style>/is',
            function($matches) use (&$minified_inline_css, &$total_css_saved) {
                $original_css = $matches[1];
                $original_size = strlen($original_css);
                
                if ($original_size > 0) {
                    $minified_css = $this->minify_css_content($original_css);
                    $saved = $original_size - strlen($minified_css);
                    $total_css_saved += $saved;
                    $minified_inline_css++;
                    
                    $this->write_log("📝 Inline CSS minifiziert: " . size_format($saved) . " gespart");
                    return '<style>' . $minified_css . '</style>';
                }
                
                return $matches[0];
            },
            $html
        );
        
        // JS minifizieren (extern)
        $this->write_log("📄 Minifiziere externe JS-Dateien");
        $html = preg_replace_callback(
            '/<script[^>]*src=["\']([^"\']+\.js[^"\']*)["\'][^>]*>([\s\S]*?)<\/script>/i',
            function($matches) use (&$minified_external_js, &$total_js_saved) {
                $url = $matches[1];
                $script_attributes = $matches[0];
                
                // Skip if it's a JSON script
                if (stripos($script_attributes, 'type="application/json"') !== false ||
                    stripos($script_attributes, 'type=\'application/json\'') !== false) {
                    $this->write_log("⚠️ JSON-Script übersprungen: " . basename($url));
                    return $matches[0];
                }

                $this->write_log("🔗 Prüfe JS-Datei: $url");
                $minified_url = $this->minify_js_file($url);
                $script_content = $matches[2];
                
                $output = '<script src="' . ($minified_url ?: $url) . '">';
                if (!empty(trim($script_content))) {
                    $output .= $this->minify_js_content($script_content);
                }
                $output .= '</script>';
                
                if ($minified_url) {
                    $minified_external_js++;
                    $this->write_log("✅ JS minifiziert: " . basename($url));
                } else {
                    $this->write_log("⚠️ JS nicht minifiziert: " . basename($url));
                }
                
                return $output;
            },
            $html
        );
        
        // Inline JS minifizieren
        $this->write_log("📝 Minifiziere Inline JavaScript");
        $html = preg_replace_callback(
            '/<script[^>]*>(.*?)<\/script>/is',
            function($matches) use (&$minified_inline_js, &$total_js_saved) {
                // Check if it's an external script or a JSON script
                if (strpos($matches[0], 'src=') !== false || 
                    stripos($matches[0], 'type="application/json"') !== false ||
                    stripos($matches[0], 'type=\'application/json\'') !== false) {
                    return $matches[0];
                }
                
                $original_js = $matches[1];
                $original_size = strlen($original_js);
                
                if ($original_size > 0) {
                    $minified_js = $this->minify_js_content($original_js);
                    $saved = $original_size - strlen($minified_js);
                    $total_js_saved += $saved;
                    $minified_inline_js++;
                    
                    $this->write_log("📝 Inline JS minifiziert: " . size_format($saved) . " gespart");
                    return '<script>' . $minified_js . '</script>';
                }
                
                return $matches[0];
            },
            $html
        );
        
        $total_minified = $minified_external_css + $minified_external_js + $minified_inline_css + $minified_inline_js;
        
        $this->write_log("📊 Minifizierung Zusammenfassung:");
        $this->write_log("   📄 Externe CSS: $minified_external_css Dateien");
        $this->write_log("   📄 Externe JS: $minified_external_js Dateien");  
        $this->write_log("   📝 Inline CSS: $minified_inline_css Blöcke");
        $this->write_log("   📝 Inline JS: $minified_inline_js Blöcke");
        $this->write_log("   💾 CSS gespart: " . size_format($total_css_saved));
        $this->write_log("   💾 JS gespart: " . size_format($total_js_saved));
        $this->write_log("   📊 Total: $total_minified Assets optimiert");
        
        return $html;
    }<?xml version="1.0" encoding="UTF-8"?>
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