* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Arial', sans-serif;
  background: linear-gradient(135deg, #ff7e5f, #af68de);
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

.container {
  text-align: center;
}

h1 {
  margin-bottom: 20px;
  color: #fff;
}

#message {
  font-size: 1.5rem;
  color: #fff;
  margin-bottom: 20px;
}

.board {
  display: grid;
  grid-template-columns: repeat(3, 100px);
  grid-template-rows: repeat(3, 100px);
  gap: 10px;
  margin-bottom: 20px;
}

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

.cell:hover {
  background-color: #f1f1f1;
}

button {
  padding: 10px 20px;
  background-color: #007bff;
  color: #fff;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  font-size: 1rem;
  margin: 5px;
}

button:hover {
  background-color: #0056b3;
}

@media (max-width: 500px) {
  .board {
    grid-template-columns: repeat(3, 80px);
    grid-template-rows: repeat(3, 80px);
  }

  .cell {
    width: 80px;
    height: 80px;
    font-size: 1.5rem;
  }
}