main#error {
  height: 100%;
  display: flex;
  flex: 1;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}
main#error .error-code {
  font-weight: 800;
  color: #f44336;
  font-size: 4rem;
}
main#error .error-message {
  margin-top: 2rem;
}