div flex colum vise property

div flex colum vise property

<style>
.flex-container {
  display: flex;
  flex-wrap: nowrap;
  background-color: DodgerBlue;
}

.flex-container .box {
  background-color: #f1f1f1;
  width: 50%;
  margin: 10px;
  text-align: center;
  line-height: 75px;
  font-size: 30px;
}
</style>