Viewport <#document> at [0,0] [0+0+0 800 0+0+0] [0+0+0 600 0+0+0] children: not-inline
  BlockContainer <html> at [1,1] [0+1+0 798 0+1+0] [0+1+0 286 0+1+0] [BFC] children: not-inline
    BlockContainer <body> at [10,10] [8+1+0 780 0+1+8] [8+1+0 268 0+1+8] children: not-inline
      Box <div.flex.row.align-start> at [11,11] flex-container(row) [0+1+0 500 0+1+278] [0+1+0 200 0+1+0] [FFC] children: not-inline
        BlockContainer <div> at [12,12] flex-item [0+1+0 136.5 0+1+0] [0+1+0 18 0+1+0] [BFC] children: inline
          frag 0 from TextNode start: 0, length: 18, rect: [12,12 136.5x18] baseline: 13.796875
              "align-items: start"
          TextNode <#text> (not painted)
      Box <div.flex.align-end> at [11,213] flex-container(row) [0+1+0 500 0+1+278] [0+1+0 20 0+1+0] [FFC] children: not-inline
        BlockContainer <div> at [12,214] flex-item [0+1+0 121.453125 0+1+0] [0+1+0 18 0+1+0] [BFC] children: inline
          frag 0 from TextNode start: 0, length: 16, rect: [12,214 121.453125x18] baseline: 13.796875
              "align-items: end"
          TextNode <#text> (not painted)
      BlockContainer <(anonymous)> at [10,234] [0+0+0 780 0+0+0] [0+0+0 0 0+0+0] children: inline
        TextNode <#text> (not painted)
      Box <div.flex.align-start> at [11,235] flex-container(row) [0+1+0 500 0+1+278] [0+1+0 20 0+1+0] [FFC] children: not-inline
        BlockContainer <div> at [12,236] flex-item [0+1+0 136.5 0+1+0] [0+1+0 18 0+1+0] [BFC] children: inline
          frag 0 from TextNode start: 0, length: 18, rect: [12,236 136.5x18] baseline: 13.796875
              "align-items: start"
          TextNode <#text> (not painted)
      Box <div.flex.column.align-end> at [11,257] flex-container(column) [0+1+0 500 0+1+278] [0+1+0 20 0+1+0] [FFC] children: not-inline
        BlockContainer <div> at [388.546875,258] flex-item [0+1+0 121.453125 0+1+0] [0+1+0 18 0+1+0] [BFC] children: inline
          frag 0 from TextNode start: 0, length: 16, rect: [388.546875,258 121.453125x18] baseline: 13.796875
              "align-items: end"
          TextNode <#text> (not painted)
      BlockContainer <(anonymous)> at [10,278] [0+0+0 780 0+0+0] [0+0+0 0 0+0+0] children: inline
        TextNode <#text> (not painted)

ViewportPaintable (Viewport<#document>) [0,0 800x600]
  PaintableWithLines (BlockContainer<HTML>) [0,0 800x288]
    PaintableWithLines (BlockContainer<BODY>) [9,9 782x270]
      PaintableBox (Box<DIV>.flex.row.align-start) [10,10 502x202]
        PaintableWithLines (BlockContainer<DIV>) [11,11 138.5x20]
          TextPaintable (TextNode<#text>)
      PaintableBox (Box<DIV>.flex.align-end) [10,212 502x22]
        PaintableWithLines (BlockContainer<DIV>) [11,213 123.453125x20]
          TextPaintable (TextNode<#text>)
      PaintableWithLines (BlockContainer(anonymous)) [10,234 780x0]
      PaintableBox (Box<DIV>.flex.align-start) [10,234 502x22]
        PaintableWithLines (BlockContainer<DIV>) [11,235 138.5x20]
          TextPaintable (TextNode<#text>)
      PaintableBox (Box<DIV>.flex.column.align-end) [10,256 502x22]
        PaintableWithLines (BlockContainer<DIV>) [387.546875,257 123.453125x20]
          TextPaintable (TextNode<#text>)
      PaintableWithLines (BlockContainer(anonymous)) [10,278 780x0]

SC for Viewport<#document> [0,0 800x600] [children: 1] (z-index: auto)
 SC for BlockContainer<HTML> [1,1 798x286] [children: 0] (z-index: auto)
