box.css

.box > div {
  height: 100%;
}
.box.full {
  height: 100%;
}

.cen {
  display: flex;
  justify-content: center;
  align-items: center;
}
.cen.full {
  height: 100%;
}

.grow {
  flex-grow: 1;
}

.shrink {
  flex-shrink: 1;
}

.expand {
  flex-grow: 99999;
}

.ver {
  display: flex;
  flex-direction: column;
}
.ver.full {
  height: 100%;
}
.ver.top {
  justify-content: flex-start;
}
.ver.bottom {
  justify-content: flex-end;
}
.ver.center {
  align-items: center;
}
.ver.left {
  align-items: flex-start;
}
.ver.right {
  align-items: flex-start;
}
.ver.middle {
  justify-content: center;
}
.ver.space {
  justify-content: space-between;
}
.ver.around {
  justify-content: space-around;
}
.ver.evenly {
  justify-content: space-evenly;
}

.hor {
  display: flex;
  flex-direction: row;
}
.hor.top {
  align-items: flex-start;
}
.hor.bottom {
  align-items: flex-end;
}
.hor.center {
  align-items: center;
}
.hor.left {
  justify-content: flex-start;
}
.hor.right {
  justify-content: flex-end;
}
.hor.middle {
  justify-content: center;
}
.hor.space {
  justify-content: space-between;
}
.hor.around {
  justify-content: space-around;
}
.hor.evenly {
  justify-content: space-evenly;
}
.hor.wrap {
  flex-wrap: wrap;
}
.hor.full {
  height: 100%;
}