body {
  font-family: Arial, sans-serif;
  background-color: #1e1e2f;
  color: white;
  text-align: center;
  padding: 20px;
}

h1 {
  margin-bottom: 20px;
}

.board {
  display: grid;
  grid-template-columns: repeat(3, 100px);
  gap: 10px;
  justify-content: center;
  margin: 20px auto;
}

.cell {
  width: 100px;
  height: 100px;
  background-color: #444;
  font-size: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border-radius: 10px;
  transition: background 0.3s;
}

.cell:hover {
  background-color: #00bcd4;
  color: black;
}

button {
  margin-top: 20px;
  padding: 10px 20px;
  font-size: 1rem;
  cursor: pointer;
}