body {
  font-family: sans-serif;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100vh;
  background: #f4f4f4;
  margin: 0;
}

h1 {
  margin-bottom: 10px;
}

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

.cell {
  width: 100px;
  height: 100px;
  font-size: 2.5rem;
  background-color: white;
  border: 2px solid #333;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.cell:hover {
  background-color: #e0f7fa;
}

#status {
  margin-top: 20px;
  font-size: 1.2rem;
}

button {
  margin-top: 10px;
  padding: 0.5rem 1rem;
  font-size: 1rem;
  cursor: pointer;
}