Viewport <#document> at [0,0] [0+0+0 800 0+0+0] [0+0+0 600 0+0+0] [BFC] children: not-inline BlockContainer at [0,0] [0+0+0 800 0+0+0] [0+0+0 118 0+0+0] [BFC] children: not-inline BlockContainer at [9,9] [8+1+0 100 0+1+690] [8+1+0 100 0+1+8] children: not-inline ViewportPaintable (Viewport<#document>) [0,0 800x600] PaintableWithLines (BlockContainer) [0,0 800x118] PaintableWithLines (BlockContainer) [8,8 102x102] SC for Viewport<#document> [0,0 800x600] [children: 1] (z-index: auto) SC for BlockContainer [0,0 800x118] [children: 1] (z-index: auto) SC for BlockContainer [9,9 100x100] [children: 0] (z-index: auto), has_transform