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

body {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  color: #111;
  background: #fff;
  max-width: 680px;
  margin: 0 auto;
  padding: 2rem 1rem;
  line-height: 1.6;
}

h1, h2, h3 {
  font-weight: bold;
  margin: 1.5em 0 0.5em;
}

h1 {
  font-size: 1.4rem;
}

h2 {
  font-size: 1.15rem;
}

h3 {
  font-size: 1rem;
}

p {
  margin: 0.75em 0;
}

a {
  color: #555;
  text-decoration: underline;
}

a:hover {
  color: #111;
}

ul, ol {
  padding-left: 1.5em;
  margin: 0.75em 0;
}

li {
  margin: 0.25em 0;
}

code {
  font-family: inherit;
  background: #f5f5f5;
  padding: 0.15em 0.3em;
  border-radius: 2px;
}

pre {
  background: #f5f5f5;
  padding: 1em;
  overflow-x: auto;
  margin: 0.75em 0;
  border-radius: 2px;
}

pre code {
  padding: 0;
  background: none;
}

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

hr {
  border: none;
  border-top: 1px solid #ddd;
  margin: 2em 0;
}