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 41 0+0+0] [BFC] children: not-inline BlockContainer at [8,8] [8+0+0 784 0+0+8] [8+0+0 25 0+0+8] children: not-inline Box at [8,8] flex-container(column) [0+0+0 784 0+0+0] [0+0+0 25 0+0+0] [FFC] children: not-inline BlockContainer at [8,8] flex-item [0+0+0 784 0+0+0] [0+0+0 25 0+0+0] [BFC] children: not-inline BlockContainer at [8,8] [0+0+0 50 0+0+734] [0+0+0 25 0+0+0] children: inline TextNode <#text> (not painted) ViewportPaintable (Viewport<#document>) [0,0 800x600] PaintableWithLines (BlockContainer) [0,0 800x41] PaintableWithLines (BlockContainer) [8,8 784x25] PaintableBox (Box

.a) [8,8 784x25] PaintableWithLines (BlockContainer

.b) [8,8 784x25] PaintableWithLines (BlockContainer

.c) [8,8 50x25] SC for Viewport<#document> [0,0 800x600] [children: 1] (z-index: auto) SC for BlockContainer [0,0 800x41] [children: 0] (z-index: auto)