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 42 0+1+0] [BFC] children: not-inline
    BlockContainer <body> at [10,10] [8+1+0 780 0+1+8] [8+1+0 24 0+1+8] children: inline
      frag 0 from TextInputBox start: 0, length: 0, rect: [13,12 200x20] baseline: 22
      TextInputBox <input> at [13,12] inline-block [0+1+2 200 2+1+0] [0+1+1 20 1+1+0] [BFC] children: not-inline
        Box <div> at [13,12] flex-container(row) [0+0+0 200 0+0+0] [0+0+0 20 0+0+0] [FFC] children: not-inline
          BlockContainer <div> at [13,12] flex-item [0+0+0 200 0+0+0] [0+0+0 20 0+0+0] [BFC] children: inline
            frag 0 from TextNode start: 0, length: 0, rect: [13,12 0x20] baseline: 16
            TextNode <#text> (not painted)

ViewportPaintable (Viewport<#document>) [0,0 800x600]
  PaintableWithLines (BlockContainer<HTML>) [0,0 800x44]
    PaintableWithLines (BlockContainer<BODY>) [9,9 782x26]
      PaintableWithLines (TextInputBox<INPUT>) [10,10 206x24]
        Paintable (Box<DIV>) [13,12 200x20]
          PaintableWithLines (BlockContainer<DIV>) [13,12 200x20]

SC for Viewport<#document> [0,0 800x600] (z-index: auto)
 SC for BlockContainer<HTML> [1,1 798x42] (z-index: auto)
