* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: Georgia, "Times New Roman", serif;
  line-height: 1.7;
  max-width: 42rem;
  margin: 0 auto;
  padding: 2rem 1rem;
  color: #222;
  background: #fff;
}

nav {
  margin-bottom: 2rem;
  font-size: 0.9rem;
}

nav a {
  color: #555;
  text-decoration: none;
}

nav a:hover {
  text-decoration: underline;
}

h1 {
  font-size: 1.8rem;
  margin-bottom: 1rem;
}

h2 {
  font-size: 1.3rem;
  margin-top: 2rem;
  margin-bottom: 0.5rem;
}

h3 {
  font-size: 1.1rem;
  margin-top: 1.5rem;
  margin-bottom: 0.4rem;
}

p, ul, ol {
  margin-bottom: 1rem;
}

ul, ol {
  padding-left: 1.5rem;
}

a {
  color: #0066cc;
}

code {
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 0.9em;
  background: #f4f4f4;
  padding: 0.15em 0.3em;
  border-radius: 3px;
}

pre {
  margin-bottom: 1rem;
  overflow-x: auto;
}

pre code {
  display: block;
  padding: 1rem;
  line-height: 1.4;
}

nav + article h1 {
  display: none;
}

ul li {
  list-style: none;
  margin-bottom: 0.5rem;
}

ul li::before {
  content: "\2022  ";
  color: #999;
}