body {
  font-family: system-ui;
  font-size: 12pt;
  margin: 2rem;
}

h1 {
  font-size: 1.4rem;
}

button {
  font-size: inherit;
  font-family: inherit;
  display: block;
  margin: 1rem 0;
}

#iframes-placeholder {
  visibility: hidden;
}