body {
  text-align: center;
  font-family: 'Segoe UI', sans-serif;
  background: linear-gradient(135deg, #89f7fe, #66a6ff);
  margin: 0;
  padding: 20px;
}
input {
  padding: 10px;
  font-size: 1.2em;
}
button {
  padding: 10px 20px;
  background-color: #007bff;
  color: white;
  border: none;
  border-radius: 5px;
  font-size: 1em;
}
#board {
  width: 60%;
  margin-top: 20px;
}