Viewport <#document> at (0,0) content-size 800x600 children: not-inline
  BlockContainer <html> at (1,1) content-size 798x45.84375 [BFC] children: not-inline
    BlockContainer <body> at (10,10) content-size 780x27.84375 children: inline
      line 0 width: 202, height: 27.84375, bottom: 27.84375, baseline: 27.84375
        frag 0 from BlockContainer start: 0, length: 0, rect: [11,11 200x25.84375]
      BlockContainer <input> at (11,11) content-size 200x25.84375 inline-block [BFC] children: not-inline
        Box <div> at (13,12) content-size 196x23.84375 flex-container(row) [FFC] children: not-inline
          BlockContainer <div> at (14,13) content-size 0x21.84375 flex-item [BFC] children: inline
            TextNode <#text>

ViewportPaintable (Viewport<#document>) [0,0 800x600]
  PaintableWithLines (BlockContainer<HTML>) [0,0 800x47.84375]
    PaintableWithLines (BlockContainer<BODY>) [9,9 782x29.84375]
      PaintableWithLines (BlockContainer<INPUT>) [10,10 202x27.84375]
        PaintableBox (Box<DIV>) [11,11 200x25.84375]
          PaintableWithLines (BlockContainer<DIV>) [13,12 2x23.84375]
