Viewport <#document> at (0,0) content-size 800x600 children: not-inline
  BlockContainer <html> at (0,0) content-size 800x34 [BFC] children: not-inline
    Box <body> at (8,8) content-size 784x18 [GFC] children: not-inline
      Box <div.main> at (8,8) content-size 100x18 flex-container(row) [FFC] children: not-inline
        BlockContainer <div.player> at (8,8) content-size 100x18 flex-item [BFC] children: inline
          frag 0 from TextNode start: 0, length: 3, rect: [8,8 26.953125x18] baseline: 13.796875
              "whf"
          TextNode <#text>

ViewportPaintable (Viewport<#document>) [0,0 800x600]
  PaintableWithLines (BlockContainer<HTML>) [0,0 800x34]
    PaintableBox (Box<BODY>) [8,8 784x18]
      PaintableBox (Box<DIV>.main) [8,8 100x18]
        PaintableWithLines (BlockContainer<DIV>.player) [8,8 100x18]
          TextPaintable (TextNode<#text>)
