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+0 420 0+1+0] [BFC] children: not-inline
    Box <body.hero> at [10,10] flex-container(column) [8+1+0 500 0+1+288] [8+1+0 402 0+1+8] [FFC] children: not-inline
      BlockContainer <div.upper> at [10,11] flex-item [0+1+0 500 0+1+0] [0+1+0 400 0+1+0] [BFC] children: inline
        frag 0 from TextNode start: 0, length: 11, rect: [10,11 453.984375x80] baseline: 63.984375
            "This entire"
        frag 1 from TextNode start: 12, length: 11, rect: [10,91 455x80] baseline: 63.984375
            "text should"
        frag 2 from TextNode start: 24, length: 5, rect: [10,171 230.78125x80] baseline: 63.984375
            "be on"
        frag 3 from TextNode start: 30, length: 6, rect: [10,251 272.109375x80] baseline: 63.984375
            "orange"
        frag 4 from TextNode start: 37, length: 11, rect: [10,331 468.75x80] baseline: 63.984375
            "background."
        TextNode <#text> (not painted)
      BlockContainer <(anonymous)> (not painted) [BFC] children: inline
        TextNode <#text> (not painted)

ViewportPaintable (Viewport<#document>) [0,0 800x600]
  PaintableWithLines (BlockContainer<HTML>) [0,0 800x422]
    Paintable (Box<BODY>.hero) [9,9 502x404]
      PaintableWithLines (BlockContainer<DIV>.upper) [9,10 502x402]

SC for Viewport<#document> [0,0 800x600] (z-index: auto)
 SC for BlockContainer<HTML> [1,1 798x420] (z-index: auto)
