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+0 316 0+0+0] [BFC] children: not-inline BlockContainer at [8,8] [8+0+0 784 0+0+8] [8+0+0 300 0+0+8] children: not-inline Box at [8,208] [0+0+0 784 0+0+0] [0+0+200 100 0+0+0] [GFC] children: not-inline ViewportPaintable (Viewport<#document>) [0,0 800x600] PaintableWithLines (BlockContainer) [0,0 800x316] PaintableWithLines (BlockContainer) [8,8 784x300] PaintableBox (Box

.box) [8,8 784x300] SC for Viewport<#document> [0,0 800x600] [children: 1] (z-index: auto) SC for BlockContainer [0,0 800x316] [children: 0] (z-index: auto)