center an element horizontally flex code example

Example 1: how center content in css by using flex

display: flex;
    width: 60%;
    justify-content: center;
    margin: 0 auto;

Example 2: flex align top css

align-items: flex-start | flex-end | center | baseline | stretch

.container {
  display: flex;
  align-items: flex-start;
}