.flex {
  display: -webkit-flex; /* Safari */
  display: flex;
}

.flex-wrap {
  -webkit-flex-wrap: wrap; /* Safari */
  flex-wrap: wrap;
}

.flex-center {
  -webkit-justify-content: center; /* Safari */
  justify-content: center;
}

.flex-left {
  -webkit-justify-content: flex-start; /* Safari */
  justify-content: flex-start;
}

.flex-right {
  -webkit-justify-content: flex-end; /* Safari */
  justify-content: flex-end;
}