textarea.assertion,
textarea.response {
  font-family: monospace;
  height: 350px;
}
h2.status.valid {
  color: rgb(20, 150, 20);
}
h2.status.invalid {
  color: rgb(150, 20, 20);
}
.spinner {
  display: none;
  vertical-align: center;
  margin-left: 20px;
}