body {
  background-color: #f9f9f5;
  font-family: 'Times New Roman', Times, serif;
  color: #2a4b5c;
  text-align: center;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 90vh;
}

h2 {
  margin-bottom: 10px;
}

button {
  padding: 10px 20px;
  font-size: 18px;
  border: 2px solid #2a4b5c;
  border-radius: 8px;
  background-color: transparent;
  cursor: pointer;
  margin-bottom: 30px;
}

.letter-boxes {
  display: flex;
  justify-content: center;
  gap: 15px;
  margin: 15px 0;
}

.key {
  border: 1px solid #ccc;
  padding: 8px 15px;
  font-weight: bold;
  font-family: monospace;
  background-color: #fff;
  border-radius: 4px;
  box-shadow: 1px 1px 3px rgba(0,0,0,0.1);
}