CSS Vertical Text Alignment

.nav2{
  background-color: #1C1C1C;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  list-style: none;
  border-radius: 20px;
  margin: 0em 0em 0em 0em;
  padding: 0px
}

.nav2 li {
  font-size: 1em;
  background-color: #0F0F0F;
  border-radius: .25em;
  box-sizing: border-box;
  margin: 3%;
  padding: 1em 0em 0em 0em;
  line-height: 3em;
  height: 5em;
  width: 5em;
}

.nav2 a{
color: #ffffff;
text-decoration: none;
}