#wrapper {
  display: grid;
  grid-template: 3fr 1fr / 1fr 1fr;
  grid-auto-flow: column;
  place-items: center;
  min-height: 100vh;
  max-width: 80vw;
  margin: 0 auto;
}

.centered {
  justify-content: center;
  align-items: center;
}

.row {
  display: flex;
  flex-direction: row;
}

.columnn .row {
  margin: 3vmin 0;
}

.box {
  width: 50%;
  height: 50%;
  background-color: purple;
  border: 2px solid black;
}