body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: #f0f2f5;
  margin: 40px auto;
  max-width: 720px;
  padding: 20px;
  color: #333;
}

h2 {
  text-align: center;
  color: #1a1a1a;
  margin-bottom: 25px;
}

button {
  display: inline-block;
  padding: 12px 24px;
  margin-top: 10px;
  font-size: 1.1rem;
  background-color: #007bff;
  color: white;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

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

#prompt {
  margin-top: 30px;
  background-color: white;
  border-radius: 8px;
  padding: 20px;
  white-space: pre-wrap;
  font-size: 1rem;
  line-height: 1.5;
  box-shadow: 0 4px 6px rgb(0 0 0 / 0.1);
  min-height: 140px;
  user-select: text;
}

#copyBtn {
  margin-left: 15px;
  background-color: #28a745;
}

#copyBtn:hover {
  background-color: #1e7e34;
}