Viewport <#document> at (0,0) content-size 800x600 children: not-inline
  BlockContainer <html> at (0,0) content-size 800x216 [BFC] children: not-inline
    BlockContainer <body> at (8,8) content-size 784x200 children: not-inline
      BlockContainer <div#guide> at (8,8) content-size 200x200 children: not-inline
        BlockContainer <div#container> at (18,18) content-size 0x0 positioned floating [BFC] children: not-inline
          BlockContainer <div#box> at (8,8) content-size 100x100 positioned [BFC] children: not-inline
