.ttt-grid {
  display: inline-grid;
  grid-template-rows: repeat(3, 1fr);
  grid-template-columns: repeat(3, 1fr);
  gap: 0.2rem;
}

.ttt-grid > button {
  width: 5rem;
  height: 5rem;
  font-size: 2rem;
  cursor: pointer;
}

.row {
  margin-top: 1rem;
}

.winner {
  font-weight: bold;
}