Conceitos do flexbox:
Aplicando conceitos: Justify Content + align-items para melhorar a brincadeira...
Justify flex-start + align-items center...
ROW
ROW
ROW
ROW
Justify flex-end + align-items center...
ROW
ROW
ROW
ROW
Justify center + align-items center...
ROW
ROW
ROW
Justify space-between + align-items center...
ROW-A
ROW-B
ROW-C
ROW-A
ROW-B
ROW-C
ROW-A
ROW-B
ROW-C
Justify space-around + align-items center...
ROW-A
ROW-B
ROW-C
ROW-A
ROW-B
ROW-C
ROW-A
ROW-B
ROW-C
Justify space-evenly + align-items center...
ROW-A
ROW-B
ROW-C
ROW-A
ROW-B
ROW-C
ROW-A
ROW-B
ROW-C