styles.css

body {
  font-family: "Poppins", sans-serif;
  color: #000000;
}

h1 {
  text-align: center;
}

#board {
  margin-left: auto;
  margin-right: auto;
  width: 375px;
  height: 375px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-gap: 5px;
}

.cell {
  width: 120px;
  height: 120px;
  border: 1px solid #d3d3d3;
  background-color: #f5f5f5;
  font-size: 40px;
  display: flex;
  justify-content: center;
  align-items: center;
}

.cell:hover {
  background-color: #ffffe0;
}

#restartButton {
  display: block;
  margin-left: auto;
  margin-right: auto;
  height: 40px;
  width: 150px;
  background-color: #ffffff;
  border: 1px solid #000000;
  border-radius: 40px;
  font-size: 18px;
}

#restartButton:hover {
  background-color: #000000;
  color: #ffffff;
}

#msg {
  margin-top: 30px;
  text-align: center;
}