.align-self-end {
  align-self: end;
}
.align-self-start {
  align-self: start;
}
.align-self-center {
  align-self: center;
}
.d-flex {
  display: flex;
}
.flex-column {
  flex-direction: column;
}
.flex-row {
  flex-direction: row;
}
.text-center {
  text-align: center;
}