body {
  padding: 0;
  margin: 0;
  background-color: blue;
  color: rgb(0, 0, 0);
}

header, main, footer {
  background-color: aqua;
  padding: 1rem;
}

pre, code {
  background-color: white;
  color: black;
}

pre {
  padding: 0.5rem;
  border-radius: 4px;
  overflow-x: auto;
}