Viewport <#document> at [0,0] [0+0+0 800 0+0+0] [0+0+0 600 0+0+0] children: not-inline
  BlockContainer <html> at [1,1] [0+1+0 798 0+1+0] [0+1+0 128 0+1+0] [BFC] children: not-inline
    BlockContainer <body> at [10,10] [8+1+0 780 0+1+8] [8+1+0 110 0+1+8] children: not-inline
      BlockContainer <(anonymous)> at [10,10] [0+0+0 780 0+0+0] [0+0+0 0 0+0+0] children: inline
        TextNode <#text> (not painted)
      Box <div.grid.start> at [11,11] [0+1+0 778 0+1+0] [0+1+0 20 0+1+0] [GFC] children: not-inline
        BlockContainer <div> at [12,12] [0+1+0 43.859375 0+1+732.140625] [0+1+0 18 0+1+0] [BFC] children: inline
          frag 0 from TextNode start: 0, length: 5, rect: [12,12 43.859375x18] baseline: 13.796875
              "Start"
          TextNode <#text> (not painted)
      BlockContainer <(anonymous)> at [10,32] [0+0+0 780 0+0+0] [0+0+0 0 0+0+0] children: inline
        TextNode <#text> (not painted)
      Box <div.grid.center> at [11,33] [0+1+0 778 0+1+0] [0+1+0 20 0+1+0] [GFC] children: not-inline
        BlockContainer <div> at [373.46875,34] [361.46875+1+0 53.046875 0+1+361.46875] [0+1+0 18 0+1+0] [BFC] children: inline
          frag 0 from TextNode start: 0, length: 6, rect: [373.46875,34 53.046875x18] baseline: 13.796875
              "Center"
          TextNode <#text> (not painted)
      BlockContainer <(anonymous)> at [10,54] [0+0+0 780 0+0+0] [0+0+0 0 0+0+0] children: inline
        TextNode <#text> (not painted)
      Box <div.grid.end> at [11,55] [0+1+0 778 0+1+0] [0+1+0 20 0+1+0] [GFC] children: not-inline
        BlockContainer <div> at [758.671875,56] [746.671875+1+0 29.328125 0+1+0] [0+1+0 18 0+1+0] [BFC] children: inline
          frag 0 from TextNode start: 0, length: 3, rect: [758.671875,56 29.328125x18] baseline: 13.796875
              "End"
          TextNode <#text> (not painted)
      BlockContainer <(anonymous)> at [10,76] [0+0+0 780 0+0+0] [0+0+0 0 0+0+0] children: inline
        TextNode <#text> (not painted)
      Box <div.grid.left> at [11,77] [0+1+0 778 0+1+0] [0+1+0 20 0+1+0] [GFC] children: not-inline
        BlockContainer <div> at [12,78] [0+1+0 32.875 0+1+743.125] [0+1+0 18 0+1+0] [BFC] children: inline
          frag 0 from TextNode start: 0, length: 4, rect: [12,78 32.875x18] baseline: 13.796875
              "Left"
          TextNode <#text> (not painted)
      BlockContainer <(anonymous)> at [10,98] [0+0+0 780 0+0+0] [0+0+0 0 0+0+0] children: inline
        TextNode <#text> (not painted)
      Box <div.grid.right> at [11,99] [0+1+0 778 0+1+0] [0+1+0 20 0+1+0] [GFC] children: not-inline
        BlockContainer <div> at [746.03125,100] [734.03125+1+0 41.96875 0+1+0] [0+1+0 18 0+1+0] [BFC] children: inline
          frag 0 from TextNode start: 0, length: 5, rect: [746.03125,100 41.96875x18] baseline: 13.796875
              "Right"
          TextNode <#text> (not painted)
      BlockContainer <(anonymous)> at [10,120] [0+0+0 780 0+0+0] [0+0+0 0 0+0+0] children: inline
        TextNode <#text> (not painted)

ViewportPaintable (Viewport<#document>) [0,0 800x600]
  PaintableWithLines (BlockContainer<HTML>) [0,0 800x130]
    PaintableWithLines (BlockContainer<BODY>) [9,9 782x112]
      PaintableWithLines (BlockContainer(anonymous)) [10,10 780x0]
      PaintableBox (Box<DIV>.grid.start) [10,10 780x22]
        PaintableWithLines (BlockContainer<DIV>) [11,11 45.859375x20]
          TextPaintable (TextNode<#text>)
      PaintableWithLines (BlockContainer(anonymous)) [10,32 780x0]
      PaintableBox (Box<DIV>.grid.center) [10,32 780x22]
        PaintableWithLines (BlockContainer<DIV>) [372.46875,33 55.046875x20]
          TextPaintable (TextNode<#text>)
      PaintableWithLines (BlockContainer(anonymous)) [10,54 780x0]
      PaintableBox (Box<DIV>.grid.end) [10,54 780x22]
        PaintableWithLines (BlockContainer<DIV>) [757.671875,55 31.328125x20]
          TextPaintable (TextNode<#text>)
      PaintableWithLines (BlockContainer(anonymous)) [10,76 780x0]
      PaintableBox (Box<DIV>.grid.left) [10,76 780x22]
        PaintableWithLines (BlockContainer<DIV>) [11,77 34.875x20]
          TextPaintable (TextNode<#text>)
      PaintableWithLines (BlockContainer(anonymous)) [10,98 780x0]
      PaintableBox (Box<DIV>.grid.right) [10,98 780x22]
        PaintableWithLines (BlockContainer<DIV>) [745.03125,99 43.96875x20]
          TextPaintable (TextNode<#text>)
      PaintableWithLines (BlockContainer(anonymous)) [10,120 780x0]

SC for Viewport<#document> [0,0 800x600] [children: 1] (z-index: auto)
 SC for BlockContainer<HTML> [1,1 798x128] [children: 0] (z-index: auto)
