html, body {
  height: 100%;
}

body {
  --size: 80px;
  display: grid;
  grid: var(--size) / var(--size);
  place-content: center;
  margin: 0;
  background: #FBFBFD;
}

span {
  border-radius: 10px;
  background: #616AFF;
  transform: translateY(-100vh);
}