Viewport <#document> at (0,0) content-size 800x600 children: not-inline
  BlockContainer <html> at (0,0) content-size 800x318 [BFC] children: not-inline
    BlockContainer <body> at (8,8) content-size 784x302 children: not-inline
      Box <div.grid-container> at (9,9) content-size 300x300 [GFC] children: not-inline
        BlockContainer <(anonymous)> (not painted) [BFC] children: inline
          TextNode <#text>
        Box <div.grid-item> at (20,20) content-size 123x123 flex-container(row) [FFC] children: not-inline
          BlockContainer <(anonymous)> at (58.140625,72.5) content-size 46.71875x18 flex-item [BFC] children: inline
            frag 0 from TextNode start: 0, length: 6, rect: [58.140625,72.5 46.71875x18] baseline: 13.796875
                "Item 1"
            TextNode <#text>
        BlockContainer <(anonymous)> (not painted) [BFC] children: inline
          TextNode <#text>
        Box <div.grid-item.relative-item> at (247.5,97.5) content-size 123x123 positioned flex-container(row) [FFC] children: not-inline
          BlockContainer <(anonymous)> at (284.40625,150) content-size 49.1875x18 flex-item [BFC] children: inline
            frag 0 from TextNode start: 0, length: 6, rect: [284.40625,150 49.1875x18] baseline: 13.796875
                "Item 2"
            TextNode <#text>
        BlockContainer <(anonymous)> (not painted) [BFC] children: inline
          TextNode <#text>
        Box <div.grid-item> at (20,175) content-size 123x123 flex-container(row) [FFC] children: not-inline
          BlockContainer <(anonymous)> at (56.765625,227.5) content-size 49.46875x18 flex-item [BFC] children: inline
            frag 0 from TextNode start: 0, length: 6, rect: [56.765625,227.5 49.46875x18] baseline: 13.796875
                "Item 3"
            TextNode <#text>
        BlockContainer <(anonymous)> (not painted) [BFC] children: inline
          TextNode <#text>
        Box <div.grid-item> at (175,175) content-size 123x123 flex-container(row) [FFC] children: not-inline
          BlockContainer <(anonymous)> at (212.4375,227.5) content-size 48.125x18 flex-item [BFC] children: inline
            frag 0 from TextNode start: 0, length: 6, rect: [212.4375,227.5 48.125x18] baseline: 13.796875
                "Item 4"
            TextNode <#text>
        BlockContainer <(anonymous)> (not painted) [BFC] children: inline
          TextNode <#text>
      BlockContainer <(anonymous)> at (8,310) content-size 784x0 children: inline
        TextNode <#text>

ViewportPaintable (Viewport<#document>) [0,0 800x600]
  PaintableWithLines (BlockContainer<HTML>) [0,0 800x318]
    PaintableWithLines (BlockContainer<BODY>) [8,8 784x302]
      PaintableBox (Box<DIV>.grid-container) [8,8 302x302] overflow: [9,9 372.5x300]
        PaintableBox (Box<DIV>.grid-item) [9,9 145x145]
          PaintableWithLines (BlockContainer(anonymous)) [58.140625,72.5 46.71875x18]
            TextPaintable (TextNode<#text>)
        PaintableBox (Box<DIV>.grid-item.relative-item) [236.5,86.5 145x145]
          PaintableWithLines (BlockContainer(anonymous)) [284.40625,150 49.1875x18]
            TextPaintable (TextNode<#text>)
        PaintableBox (Box<DIV>.grid-item) [9,164 145x145]
          PaintableWithLines (BlockContainer(anonymous)) [56.765625,227.5 49.46875x18]
            TextPaintable (TextNode<#text>)
        PaintableBox (Box<DIV>.grid-item) [164,164 145x145]
          PaintableWithLines (BlockContainer(anonymous)) [212.4375,227.5 48.125x18]
            TextPaintable (TextNode<#text>)
      PaintableWithLines (BlockContainer(anonymous)) [8,310 784x0]
