flexbox center div in the middle of page code example

Example 1: how to align a flex container center

.table-wrapper {
  display: flex;
  flex-direction: column;
  padding: 2rem;
  margin: 0 auto;
}

Example 2: flexbox middle item centered

.Aligner {
  display: flex;
  align-items: center;
  justify-content: center;
}

.Aligner-item {
  max-width: 50%;
}

.Aligner-item--top {
  align-self: flex-start;
}

.Aligner-item--bottom {
  align-self: flex-end;
}