body {
  font-family: sans-serif;
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-top: 50px;
  background: #f4f4f4;
}

h1 {
  margin-bottom: 20px;
}

.board {
  display: grid;
  grid-template-columns: repeat(3, 100px);
  grid-template-rows: repeat(3, 100px);
  gap: 5px;
}

.cell {
  background: white;
  border: 2px solid #444;
  font-size: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  user-select: none;
}

.cell:hover {
  background: #eee;
}

.info {
  margin-top: 20px;
  text-align: center;
}

button {
  padding: 10px 20px;
  font-size: 1rem;
}