* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  display: grid;
  grid-template-rows: 1fr auto;
  color: #222222;
  background: #ffffff;
  font-family: Arial, sans-serif;
  line-height: 1.6;
}

main {
  width: min(100% - 2rem, 48rem);
  margin: 0 auto;
  padding: 3rem 0;
}

h1 {
  margin-top: 0;
  font-size: 2.5rem;
  line-height: 1.2;
}

h2 {
  line-height: 1.2;
}

nav {
  margin: 1.5rem 0;
}

nav a + a {
  margin-left: 1rem;
}

section {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid #cccccc;
}

iframe {
  width: 100%;
  height: 32rem;
  margin-top: 1rem;
  border: 1px solid #aaaaaa;
}

footer {
  padding: 1.25rem;
  color: #666666;
  font-size: 0.875rem;
  text-align: center;
}