body {
  font-family: Arial, sans-serif;
  background: #111;
  color: #eee;
  margin: 0;
  padding: 0;
  text-align: center;
}
header, footer {
  background: #1b1b1b;
  padding: 1rem;
}
main {
  padding: 2rem;
}
input[type="text"] {
  width: 60%;
  padding: 0.8rem;
  font-size: 1rem;
  border-radius: 8px;
  border: none;
  margin-bottom: 1rem;
}
button {
  padding: 0.7rem 2rem;
  background: #0af;
  color: white;
  border: none;
  border-radius: 6px;
  font-size: 1rem;
  cursor: pointer;
}
.result-box {
  background: #222;
  border-radius: 12px;
  padding: 2rem;
  display: inline-block;
  text-align: left;
  margin-top: 1rem;
}