body {
  font-family: Arial, sans-serif;
  max-width: 800px;
  margin: 0 auto;
  padding: 20px;
  background-color: #f5f5f5;
}

.container {
  background-color: white;
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

h1 {
  color: #333;
  text-align: center;
}

.form-group {
  margin-bottom: 15px;
}

label {
  display: block;
  margin-bottom: 5px;
  font-weight: bold;
}

select,
button {
  width: 100%;
  padding: 10px;
  border: 1px solid #ddd;
  border-radius: 4px;
  font-size: 16px;
}

button {
  background-color: #4CAF50;
  color: white;
  border: none;
  cursor: pointer;
  margin-top: 10px;
}

button:hover {
  background-color: #45a049;
}

button:disabled {
  background-color: #cccccc;
  cursor: not-allowed;
}

.result {
  margin-top: 20px;
  padding: 15px;
  background-color: #f9f9f9;
  border-radius: 4px;
  display: none;
}

.loading {
  text-align: center;
  display: none;
}