.flex {
  display: flex;
}
.block {
  display: block;
}
.inline-block {
  display: inline-block;
}
.none {
  display: none;
}
.flex-x-c {
  justify-content: center;
}
.flex-x-center {
  justify-content: center;
}
.flex-x-sa {
  justify-content: space-around;
}
.flex-x-sb {
  justify-content: space-between;
}
.flex-x-start {
  justify-content: flex-start;
}
.flex-x-end {
  justify-content: flex-end;
}
.flex-wrap {
  flex-wrap: wrap;
}
.flex-col {
  flex-direction: column;
}
.flex-row {
  flex-direction: row;
}