0. display: flex
1. flex-direction: row
2. flex-direction: row-reverse
3. flex-direction: column
4. flex-direction: column-revers
5. justify-content: flex-start
6. justify-content: center
7. justify-content: flex-end
8. justify-content: space-between
9. justify-content: space-around
10. justify-content: space-evenly
11. align-items: stretch
12. align-items: flex-start
13. align-items: center
14. align-items: flex-end
15. align-items: center, justify-content: center
16. flex-wrap: nowrap 折り返しなし
17. flex-wrap: wrap 1アイテム400px、折り返し指示
18. order
19. flex-basis
20. flex-grow
21. flex-grow 均等配置
22. flex-grow 配分を変える
23. flex-shrink 初期値は1
24. flex-shrink 他の幅も調整する