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 [1,1] [0+1+0 798 0+1+0] [0+1+0 38 0+1+0] [BFC] children: not-inline Box at [10,10] flex-container(row) [8+1+0 780 0+1+8] [8+1+0 20 0+1+8] [FFC] children: not-inline BlockContainer at [11,11] flex-item [0+1+0 202 0+1+0] [0+1+0 18 0+1+0] [BFC] children: not-inline BlockContainer at [12,12] [0+1+0 200 0+1+0] [0+1+0 16 0+1+0] children: inline frag 0 from TextNode start: 0, length: 4, rect: [12,12 45.15625x16] baseline: 12.796875 "OPEN" TextNode <#text> (not painted) ViewportPaintable (Viewport<#document>) [0,0 800x600] PaintableWithLines (BlockContainer) [0,0 800x40] Paintable (Box.outer) [9,9 782x22] PaintableWithLines (BlockContainer

.middle) [10,10 204x20] PaintableWithLines (BlockContainer

.inner) [11,11 202x18] SC for Viewport<#document> [0,0 800x600] (z-index: auto) SC for BlockContainer [1,1 798x38] (z-index: auto)