.container {
  max-width: 768px;
  margin: 0 auto;
}

.url-form {
  display: flex;
  flex-direction: column;
}

.url-form textarea {
  resize: vertical;
}

.url-form button {
  margin: 1rem 0;
  padding: .35rem 0;
  font-size: 1rem;
}

.url-form output {
  font-weight: 700;
}

.error {
  color: brown;
}

.success {
  color: darkgreen;
}