:root {
  color-scheme: light dark;
  font-family: system-ui, sans-serif;
  line-height: 1.6;
}

body {
  margin: 0 auto;
  max-width: 48rem;
  padding: 1rem;
}

header,
footer {
  border-block-color: currentColor;
  border-block-style: solid;
  border-block-width: 0 0.0625rem;
  padding-block: 1rem;
}

footer {
  border-block-width: 0.0625rem 0 0;
  margin-block-start: 3rem;
}

a {
  text-underline-offset: 0.15em;
}

img,
pre,
table {
  max-width: 100%;
  overflow-x: auto;
}