body {
  font-family: Arial, sans-serif;
  background: #f0f0f0;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
}

.container {
  background: white;
  padding: 20px 30px;
  border-radius: 10px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
  width: 600px;
  max-width: 95%;
}

h2 {
  margin-top: 0;
  text-align: center;
}

.input-group {
  display: flex;
  gap: 10px;
  margin-bottom: 15px;
}

input[type="text"] {
  flex: 1;
  padding: 10px;
  font-size: 16px;
  border-radius: 5px;
  border: 1px solid #ccc;
}

button {
  padding: 10px 15px;
  font-size: 16px;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  background: #007bff;
  color: white;
}

button:hover {
  background: #0056b3;
}

.error {
  background: #f8d7da;
  color: #721c24;
  padding: 10px;
  border-radius: 5px;
  margin-bottom: 10px;
  display: none;
}

.response-area {
  margin-top: 15px;
  display: none;
}

pre {
  background: #f4f4f4;
  padding: 10px;
  border-radius: 5px;
  overflow-x: auto;
}

.copy-button {
  margin-top: 5px;
  background: #28a745;
}

.copy-button:hover {
  background: #1e7e34;
}