Viewport <#document> at (0,0) content-size 800x600 children: not-inline
  BlockContainer <html> at (1,1) content-size 798x480 [BFC] children: not-inline
    Box <body.hero> at (10,10) content-size 500x462 flex-container(column) [FFC] children: not-inline
      BlockContainer <div.upper> at (10,11) content-size 500x460 flex-item [BFC] children: inline
        frag 0 from TextNode start: 0, length: 11, rect: [10,11 453.984375x92] baseline: 69.984375
            "This entire"
        frag 1 from TextNode start: 12, length: 11, rect: [10,103 455x92] baseline: 69.984375
            "text should"
        frag 2 from TextNode start: 24, length: 5, rect: [10,195 230.78125x92] baseline: 69.984375
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        frag 3 from TextNode start: 30, length: 6, rect: [10,287 272.109375x92] baseline: 69.984375
            "orange"
        frag 4 from TextNode start: 37, length: 11, rect: [10,379 468.75x92] baseline: 69.984375
            "background."
        TextNode <#text>
      BlockContainer <(anonymous)> (not painted) [BFC] children: inline
        TextNode <#text>

ViewportPaintable (Viewport<#document>) [0,0 800x600]
  PaintableWithLines (BlockContainer<HTML>) [0,0 800x482]
    PaintableBox (Box<BODY>.hero) [9,9 502x464] overflow: [9,10 502x462]
      PaintableWithLines (BlockContainer<DIV>.upper) [9,10 502x462]
        TextPaintable (TextNode<#text>)
