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 [0,0] [0+0+0 800 0+0+0] [0+0+0 16 0+0+0] [BFC] children: not-inline
    BlockContainer <body> at [8,8] [8+0+0 784 0+0+8] [8+0+0 0 0+0+8] children: inline
      TextNode <#text> (not painted)
  BlockContainer <(anonymous)> at [0,0] positioned [0+0+0 800 0+0+0] [0+0+0 600 0+0+0] [BFC] children: not-inline
  Box <dialog#modal> at [358.84375,291] positioned flex-container(row) [339.84375+3+16 82.3125 16+3+339.84375] [272+3+16 18 16+3+272] [FFC] children: not-inline
    BlockContainer <(anonymous)> (not painted) [BFC] children: inline
      TextNode <#text> (not painted)
    BlockContainer <span> at [358.84375,291] flex-item [0+0+0 82.3125 0+0+0] [0+0+0 18 0+0+0] [BFC] children: inline
      frag 0 from TextNode start: 0, length: 10, rect: [358.84375,291 82.3125x18] baseline: 13.796875
          "I'm a node"
      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 800x16]
    PaintableWithLines (BlockContainer<BODY>) [8,8 784x0]
  PaintableWithLines (BlockContainer(anonymous)) [0,0 800x600]
  PaintableBox (Box<DIALOG>#modal) [339.84375,272 120.3125x56]
    PaintableWithLines (BlockContainer<SPAN>) [358.84375,291 82.3125x18]
      TextPaintable (TextNode<#text>)

SC for Viewport<#document> [0,0 800x600] [children: 3] (z-index: auto)
 SC for BlockContainer<HTML> [0,0 800x16] [children: 0] (z-index: auto)
 SC for BlockContainer(anonymous) [0,0 800x600] [children: 0] (z-index: auto)
 SC for Box<DIALOG>#modal [358.84375,291 82.3125x18] [children: 0] (z-index: auto)
