
    
     box-shadow
    
    
     :
    
    
     
      0
     
     
      
      
       x offset
      
     
    
    
     
      0
     
     
      
      
       y offset
      
     
    
    
     
      0
     
     
      
      
       blur radius
      
     
    
    
     
      0
     
     
      
      
       spread radius
boo!