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+0 116 0+0+0] [BFC] children: not-inline Box at [8,8] flex-container(row) [8+0+0 400 0+0+392] [8+0+0 100 0+0+8] [FFC] children: not-inline Box at [8,8] flex-container(column) flex-item [0+0+0 200 0+0+0] [0+0+0 100 0+0+0] [FFC] children: not-inline BlockContainer at [8,8] flex-item [0+0+0 200 0+0+0] [0+0+0 200 0+0+0] [BFC] children: not-inline BlockContainer at [8,8] [0+0+0 200 0+0+0] [0+0+0 200 0+0+0] children: not-inline BlockContainer at [8,208] flex-item [0+0+0 200 0+0+0] [0+0+0 18 0+0+0] [BFC] children: inline frag 0 from TextNode start: 0, length: 3, rect: [8,208 26.953125x18] baseline: 13.796875 "whf" TextNode <#text> (not painted) ViewportPaintable (Viewport<#document>) [0,0 800x600] PaintableWithLines (BlockContainer) [0,0 800x116] PaintableBox (Box) [8,8 400x100] PaintableBox (Box

.outer) [8,8 200x100] PaintableWithLines (BlockContainer

.upper) [8,8 200x200] PaintableWithLines (BlockContainer

.spacer) [8,8 200x200] PaintableWithLines (BlockContainer

.lower) [8,208 200x18] TextPaintable (TextNode<#text>) SC for Viewport<#document> [0,0 800x600] [children: 1] (z-index: auto) SC for BlockContainer [0,0 800x116] [children: 0] (z-index: auto)