body {
  font-family: Arial, sans-serif;
  background: #f4f4f9;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
}
.container {
  background: white;
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.2);
  width: 300px;
}
form {
  display: flex;
  flex-direction: column;
}
label {
  margin: 8px 0 4px;
}
input, select, textarea, button {
  padding: 8px;
  margin-bottom: 10px;
}
button {
  background: #28a745;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}
button:hover {
  background: #218838;
}
#response {
  margin-top: 15px;
  font-weight: bold;
}