/* simple styles */
body {
  font-family: sans-serif;
  margin: 2rem;
  background: #fff;
  color: #222;
}

h1, h2 {
  margin-bottom: 1rem;
}

section {
  margin-bottom: 2rem;
}

.card {
  margin-bottom: 1.5rem;
  padding: 0.5rem;
  background: #f5f5f5;
  border-radius: 6px;
}

iframe {
  width: 100%;
  border: none;
}