align middle if single in flex else to left code example
Example 1: flexbox align right and left
.primary-nav {
display:-webkit-flex;
display:flex;
list-style-type:none;
padding:0;
justify-content:flex-end;
}
.left {
margin-right:auto;
}
Example 2: how center content in css by using flex
display: flex;
width: 60%;
justify-content: center;
margin: 0 auto;