layer at (0,0) size 800x600
  RenderView at (0,0) size 800x600
layer at (0,0) size 800x600
  RenderBlock {HTML} at (0,0) size 800x600
    RenderBody {BODY} at (8,8) size 784x584
      RenderBlock {DETAILS} at (0,0) size 784x136 [border: (8px solid #555599)]
        RenderBlock {SUMMARY} at (8,8) size 768x102 [border: (8px solid #9999CC)]
          RenderBlock (anonymous) at (8,8) size 752x18
            RenderDetailsMarker {DIV} at (0,4) size 11x11: down
            RenderText {#text} at (16,0) size 63x18
              text run at (16,0) width 5: " "
              text run at (20,0) width 59: "summary"
          RenderBlock {DETAILS} at (8,26) size 752x68 [border: (8px solid #995555)]
            RenderBlock {SUMMARY} at (8,8) size 736x34 [border: (8px solid #CC9999)]
              RenderDetailsMarker {DIV} at (8,12) size 11x11: down
              RenderText {#text} at (24,8) size 283x18
                text run at (24,8) width 5: " "
                text run at (28,8) width 279: "nested summary (summary-deails-summary)"
            RenderBlock (anonymous) at (8,42) size 736x18
              RenderText {#text} at (0,0) size 197x18
                text run at (0,0) width 197: "nested details (summary-deails)"
        RenderBlock (anonymous) at (8,110) size 768x18
          RenderText {#text} at (0,0) size 40x18
            text run at (0,0) width 40: "details"