Viewport <#document> at (0,0) content-size 800x600 children: not-inline
  BlockContainer <html> at (0,0) content-size 800x76 [BFC] children: not-inline
    BlockContainer <body> at (8,8) content-size 784x60 children: not-inline
      Box <div.grid> at (8,8) content-size 784x60 [GFC] children: not-inline
        BlockContainer <div#c1> at (8,8) content-size 23x11 [BFC] children: not-inline
        BlockContainer <div#c2> at (8,8) content-size 52x24 [BFC] children: not-inline
        BlockContainer <div#c3> at (8,8) content-size 83x41 [BFC] children: not-inline
        BlockContainer <div#c4> at (8,8) content-size 120x60 [BFC] children: not-inline

ViewportPaintable (Viewport<#document>) [0,0 800x600]
  PaintableWithLines (BlockContainer<HTML>) [0,0 800x76]
    PaintableWithLines (BlockContainer<BODY>) [8,8 784x60]
      PaintableBox (Box<DIV>.grid) [8,8 784x60]
        PaintableWithLines (BlockContainer<DIV>#c1) [8,8 23x11]
        PaintableWithLines (BlockContainer<DIV>#c2) [8,8 52x24]
        PaintableWithLines (BlockContainer<DIV>#c3) [8,8 83x41]
        PaintableWithLines (BlockContainer<DIV>#c4) [8,8 120x60]
