.square {
  border: 1px solid black;
  background-color: rgb(223, 219, 219);
  width: 75px;
  height: 75px;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 3.5em;
  font-weight: bolder;
}

body {
  height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  font-family: sans-serif;
}

.row {
  display: flex;
  flex-direction: row;
  gap: 5px;
}

.grid {
  margin-top: 10px;
  gap: 5px;
  display: flex;
  flex-direction: column;
}