body {
  font-family: system-ui, sans-serif;
  background: #0f172a;
  color: #e5e7eb;
  margin: 0;
  padding: 0;
}

header {
  text-align: center;
  padding: 2rem;
}

textarea {
  width: 90%;
  height: 120px;
  margin: 1rem auto;
  display: block;
  padding: 1rem;
  font-size: 1rem;
}

button {
  display: block;
  margin: 0 auto;
  padding: 0.7rem 1.5rem;
  font-size: 1rem;
  cursor: pointer;
}

#results {
  margin-top: 2rem;
  text-align: center;
}

footer {
  text-align: center;
  margin-top: 4rem;
  font-size: 0.8rem;
  opacity: 0.7;
}