anchor.diff:     (style 
       #.(cl-css:css
          '((body
  -          :background "lightgray"
  +          :background "rgb(150, 150, 150)"
             :font-size "14px"
             :color "black"
             :padding 0
  
positive.code:          ("#controls"
            :font-size "16px"
            :font-weight "700"
            :background-color "rgb(80,80,80)"
            :padding-left "5px"
            :overflow "hidden"
            :white-space "nowrap"
  
negative.code:          (".tab:hover"
            :color "black")
           ("#modes"
            :background-color "rgb(110,110,110)"
            :color "white"
            :text-align "right"
            :padding-left "10px"
  