body {
  max-width: 44rem;
  margin: 2.5rem auto;
  padding: 0 1rem;
  color: #222;
  background: #fff;
  font: 1rem/1.65 system-ui, sans-serif;
}

h1, h2, h3 {
  line-height: 1.25;
}

h1 { font-size: 2rem; }
h2 { margin-top: 2rem; font-size: 1.4rem; }
a { color: #165b91; text-underline-offset: .15em; }

img, svg {
  max-width: 100%;
  height: auto;
}

figure { margin: 1.5rem 0; }
figcaption { color: #555; font-size: .9rem; }
blockquote { margin: 1.5rem 0; padding-left: 1rem; border-left: 2px solid #ccc; }
.math.display { display: block; overflow-x: auto; }