feature detect css

1@supports (flex-flow: row) and (flex: 1) {
2
3  main {
4    display: flex;
5  }
6
7  main div {
8    padding-right: 4%;
9    flex: 1;
10  }
11
12  main div:last-child {
13    padding-right: 0;
14  }
15
16}