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] positioned [0+0+0 400 0+0+400] [0+0+0 200 0+0+0] [BFC] children: not-inline Box at [0,0] positioned flex-container(row) [0+0+0 60 0+0+0] [0+0+0 40 0+0+0] [FFC] children: not-inline BlockContainer at [0,0] flex-item [0+0+0 30 0+0+0] [0+0+0 40 0+0+0] [BFC] children: not-inline BlockContainer at [0,0] [0+0+0 60 0+0+-30] [0+0+0 40 0+0+0] children: not-inline BlockContainer <(anonymous)> (not painted) [BFC] children: inline TextNode <#text> (not painted) ViewportPaintable (Viewport<#document>) [0,0 800x600] PaintableWithLines (BlockContainer) [0,0 400x200] PaintableBox (Box) [0,0 60x40] PaintableWithLines (BlockContainer

.child) [0,0 30x40] PaintableWithLines (BlockContainer

.content) [0,0 60x40] SC for Viewport<#document> [0,0 800x600] [children: 1] (z-index: auto) SC for BlockContainer [0,0 400x200] [children: 0] (z-index: auto)