Viewport <#document> at (0,0) content-size 800x600 children: not-inline
  BlockContainer <html> at (0,0) content-size 800x600 [BFC] children: not-inline
    BlockContainer <body> at (8,8) content-size 784x17 children: not-inline
      Box <div.grid> at (8,8) content-size 784x17 [GFC] children: not-inline
        BlockContainer <div.item-left> at (8,8) content-size 261.328125x17 [BFC] children: inline
          frag 0 from TextNode start: 0, length: 3, rect: [8,8 21.609375x17] baseline: 13.296875
              "1fr"
          TextNode <#text>
        BlockContainer <div.item-right> at (269.328125,8) content-size 522.65625x17 [BFC] children: inline
          frag 0 from TextNode start: 0, length: 3, rect: [269.328125,8 21.609375x17] baseline: 13.296875
              "1fr"
          TextNode <#text>

ViewportPaintable (Viewport<#document>) [0,0 800x600]
  PaintableWithLines (BlockContainer<HTML>) [0,0 800x600]
    PaintableWithLines (BlockContainer<BODY>) [8,8 784x17]
      PaintableBox (Box<DIV>.grid) [8,8 784x17]
        PaintableWithLines (BlockContainer<DIV>.item-left) [8,8 261.328125x17]
          TextPaintable (TextNode<#text>)
        PaintableWithLines (BlockContainer<DIV>.item-right) [269.328125,8 522.65625x17]
          TextPaintable (TextNode<#text>)
