Viewport <#document> at [0,0] [0+0+0 800 0+0+0] [0+0+0 600 0+0+0] children: not-inline
  BlockContainer <html> at [0,0] [0+0+0 800 0+0+0] [0+0+0 600 0+0+0] [BFC] children: not-inline
    BlockContainer <body> at [18,18] [8+10+0 764 0+10+8] [8+10+0 300 0+10+8] children: not-inline
      BlockContainer <div.box> at [18,18] [0+0+0 100 0+0+664] [0+0+0 100 0+0+0] children: not-inline

ViewportPaintable (Viewport<#document>) [0,0 800x600]
  PaintableWithLines (BlockContainer<HTML>) [0,0 800x600]
    PaintableWithLines (BlockContainer<BODY>) [8,8 784x320]
      PaintableWithLines (BlockContainer<DIV>.box) [18,18 100x100]

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