Viewport <#document> at [0,0] [0+0+0 800 0+0+0] [0+0+0 600 0+0+0] [BFC] children: not-inline
  BlockContainer <html> at [1,1] [0+1+0 798 0+1+0] [0+1+0 56 0+1+0] [BFC] children: not-inline
    BlockContainer <body> at [10,10] [8+1+0 780 0+1+8] [8+1+0 38 0+1+8] children: not-inline
      Box <div.grid-container> at [11,11] [0+1+0 778 0+1+0] [0+1+0 36 0+1+0] [GFC] children: not-inline
        BlockContainer <div.a> at [62,12] [0+1+0 98 0+1+0] [0+1+0 16 0+1+0] [BFC] children: inline
          frag 0 from TextNode start: 0, length: 1, rect: [62,12 6.34375x16] baseline: 12.796875
              "1"
          TextNode <#text> (not painted)
        BlockContainer <div> at [162,12] [0+1+0 48 0+1+0] [0+1+0 16 0+1+0] [BFC] children: inline
          frag 0 from TextNode start: 0, length: 1, rect: [162,12 8.8125x16] baseline: 12.796875
              "2"
          TextNode <#text> (not painted)
        BlockContainer <div> at [212,12] [0+1+0 98 0+1+0] [0+1+0 16 0+1+0] [BFC] children: inline
          frag 0 from TextNode start: 0, length: 1, rect: [212,12 9.09375x16] baseline: 12.796875
              "3"
          TextNode <#text> (not painted)
        BlockContainer <div> at [12,30] [0+1+0 48 0+1+0] [0+1+0 16 0+1+0] [BFC] children: inline
          frag 0 from TextNode start: 0, length: 1, rect: [12,30 7.75x16] baseline: 12.796875
              "4"
          TextNode <#text> (not painted)

ViewportPaintable (Viewport<#document>) [0,0 800x600]
  PaintableWithLines (BlockContainer<HTML>) [0,0 800x58]
    PaintableWithLines (BlockContainer<BODY>) [9,9 782x40]
      Paintable (Box<DIV>.grid-container) [10,10 780x38]
        PaintableWithLines (BlockContainer<DIV>.a) [61,11 100x18]
        PaintableWithLines (BlockContainer<DIV>) [161,11 50x18]
        PaintableWithLines (BlockContainer<DIV>) [211,11 100x18]
        PaintableWithLines (BlockContainer<DIV>) [11,29 50x18]

SC for Viewport<#document> [0,0 800x600] (z-index: auto)
 SC for BlockContainer<HTML> [1,1 798x56] (z-index: auto)
