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 18 0+1+0] [BFC] children: not-inline
    BlockContainer <body> at [10,10] [8+1+0 780 0+1+8] [8+1+0 0 0+1+8] children: not-inline
      Box <nav> at [11,11] positioned flex-container(row) [0+1+0 310.453125 0+1+0] [0+1+0 20 0+1+0] [FFC] children: not-inline
        BlockContainer <div.item> at [12,12] flex-item [0+1+0 308.453125 0+1+0] [0+1+0 18 0+1+0] [BFC] children: inline
          frag 0 from TextNode start: 0, length: 36, rect: [12,12 308.453125x18] baseline: 13.796875
              "This should have a green background."
          TextNode <#text> (not painted)

ViewportPaintable (Viewport<#document>) [0,0 800x600]
  PaintableWithLines (BlockContainer<HTML>) [0,0 800x20]
    PaintableWithLines (BlockContainer<BODY>) [9,9 782x2]
      PaintableBox (Box<NAV>) [10,10 312.453125x22]
        PaintableWithLines (BlockContainer<DIV>.item) [11,11 310.453125x20]
          TextPaintable (TextNode<#text>)

SC for Viewport<#document> [0,0 800x600] [children: 1] (z-index: auto)
 SC for BlockContainer<HTML> [1,1 798x18] [children: 0] (z-index: auto)
