body {
  font-family: 'Segoe UI', sans-serif;
  background: #ffffff;
  margin: 0;
  padding: 0;
  color: #333;
}
.container {
  max-width: 600px;
  margin: 60px auto;
  text-align: center;
}
input {
  padding: 10px;
  width: 80%;
  margin: 10px auto;
  font-size: 1rem;
}
button {
  padding: 10px 20px;
  background-color: #111;
  color: #fff;
  border: none;
  cursor: pointer;
}
.response {
  background: #f4f4f4;
  padding: 15px;
  margin-top: 20px;
  border-radius: 8px;
}
footer {
  text-align: center;
  margin-top: 100px;
  font-size: 0.9rem;
  color: #777;
}