anchor.diff:        height: SLIDER_HANDLE_SIZE - 4
         boxShadow: '3px 3px 0 0 white'
         transform: 
  -        "scale(#{.4 + .3 * Math.abs(stance) }, #{.08 + .4 * stance}) 
  +        "scale(#{.4 + .3 * Math.abs(stance) }, #{if Math.abs(mouth_scale_y) < .08 then (if mouth_scale_y >= 0 then 1 else -1) * .08 else mouth_scale_y}) 
            translate(0, #{-2 - 5 * Math.abs(stance)}px) 
            rotate(45deg)"
   
  
positive.code:       slider_feedback = if !slider.has_moved then 'Slide Your Overall Opinion' else "You #{stanceLabel(slider.stance)}"
        feedback_style = 
          pointerEvents: 'none' # clicking on feedback interferes with slider and toggle state
          fontSize: if sticky then 18 else 29
          fontWeight: 700
          color: focus_blue
  
  
negative.code:       height: 3
        transform: "scale(#{.8 + .2 * Math.abs(stance)}, #{.8 + .2 * Math.abs(stance)})"
  
      mouth_scale_y = .4 * stance
      face_mouth_style = 
        bottom: -1
        width: SLIDER_HANDLE_SIZE - 4
  