body {
  font-family: "Segoe UI", sans-serif;
  margin: 0;
  padding: 0;
  background: #f9f9f9;
  color: #333;
  text-align: center;
}

header {
  background: #24292e;
  color: white;
  padding: 2rem;
}

input {
  padding: 0.8rem;
  width: 60%;
  margin: 1rem auto;
  border: 1px solid #ccc;
  border-radius: 5px;
}

button {
  padding: 0.8rem 1.5rem;
  background-color: #2ea44f;
  color: white;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}

#result {
  margin-top: 2rem;
}