body {
  font-family: Arial, sans-serif;
  text-align: center;
  background: linear-gradient(135deg, #f9f9f9, #eaeaea);
  margin: 0;
  padding: 0;
}
#app {
  padding: 20px;
  max-width: 600px;
  margin: 50px auto;
  background: #fff;
  border-radius: 10px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}
textarea {
  width: 100%;
  height: 100px;
  margin-bottom: 10px;
  padding: 10px;
  border: 1px solid #ccc;
  border-radius: 5px;
  resize: none;
}
button {
  padding: 10px 20px;
  font-size: 16px;
  color: #fff;
  background: #007bff;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  transition: background 0.3s;
}
button:hover {
  background: #0056b3;
}
#result {
  margin-top: 20px;
  font-size: 18px;
  font-weight: bold;
  color: #333;
}