body {
  text-align: center;
  font-family: Arial, sans-serif;
  background: linear-gradient(to right, #6a11cb, #2575fc);
  color: white;
}

.board {
  display: grid;
  grid-template-columns: repeat(3, 100px);
  grid-gap: 5px;
  margin: 20px auto;
  width: 310px;
  padding: 10px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 10px;
}

.cell {
  width: 100px;
  height: 100px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: white;
  font-size: 2em;
  font-weight: bold;
  cursor: pointer;
  border-radius: 10px;
  box-shadow: 2px 2px 10px rgba(0, 0, 0, 0.2);
  transition: background 0.3s, transform 0.2s;
}

.cell:hover {
  background: #a1c4fd;
  transform: scale(1.05);
}

.cell.X {
  color: red;
}

.cell.O {
  color: green;
}

button {
  padding: 10px 20px;
  font-size: 16px;
  cursor: pointer;
  border: none;
  border-radius: 5px;
  background: #2575fc;
  color: white;
  font-weight: bold;
  transition: background 0.3s;
}

button:hover {
  background: #6a11cb;
}