GeoServer CSS Styling variable

May I set variable in CSS, like as

I have this:

* {
  fill: [recode(strTrim(name),
         'Akmola Region', '#6495ED',
         'Aktobe Region', '#B0C4DE')];
  fill-opacity:0.4;

  stroke: lightgrey;
}

but I want set variables for Fill and Stroke-width parameters. Like this:

          
           
            
             name
             Akmola Region

            
          
            
                                   
                  
                  #
                 Akmola_fill_color 
                   6495ED  
                                     
                   

                  0.4
                  
              
                #605f5f
                
                
                Akmola_stroke_width
                0.1 
                
                                 

              
          
        

        
          
           
            
             name
             Aktobe Region

            
          
            
                  
                  
                  #
                 Aktobe_fill_color 
                   B0C4DE  
                                     
                   

                    0.4
                  
              
                #605f5f
                
                
                Aktobe_stroke_width
                0.1 
                
                                 

              
          
        

I want emulate hover event when mouse hover on map object. Maybe it is possible with css capabilities?