center ul

1ul {
2  justify-content: center;
3  display: flex;
4}

1dropdwon-menu {
2	left: 50%;
3	transform: translateX(-50%);
4}

1.list-wrapper {
2   text-align: -webkit-center;
3}
4.list-wrapper ul {
5    display:block;
6}   
7