.f-column {
  display:flex;
  flex-direction: column;
  &.reverse {
    flex-direction:column-reverse;
  }
}

.f-row {
  display:flex;
  flex-direction: row;
  &.reverse {
    flex-direction:row-reverse;
  }
}

.f-start {
  justify-content: flex-start;
}

.f-end {
  justify-content: flex-end;
}

.f-center {
  justify-content: center;
}

.f-around {
  justify-content: space-around;
}

.f-between {
  justify-content: space-between;
}