* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: #ffffff;
  color: #111111;
  font-family:
    -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic UI",
    "Noto Sans JP", "Segoe UI", Roboto, sans-serif;
  line-height: 1.75;
}

header,
main,
footer {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 20px;
}

header {
  padding-top: 40px;
}

main {
  padding-top: 16px;
  padding-bottom: 56px;
}

footer {
  padding-bottom: 40px;
  color: #666666;
  font-size: 0.95rem;
}

h1 {
  margin: 0 0 8px;
  font-size: 2rem;
  line-height: 1.35;
}

h2 {
  margin: 32px 0 12px;
  font-size: 1.25rem;
  line-height: 1.45;
}

p {
  margin: 0 0 12px;
}

ul {
  margin: 8px 0 0 1.1rem;
  padding: 0;
}

li {
  margin-bottom: 4px;
}

a {
  color: #222222;
  text-decoration-color: #bdbdbd;
  text-underline-offset: 2px;
}

code {
  background: #f5f5f5;
  padding: 2px 6px;
  border-radius: 6px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.92em;
}

.muted {
  color: #666666;
}

.link-list {
  list-style: none;
  margin-left: 0;
}

.link-list li {
  margin-bottom: 8px;
}

@media (min-width: 640px) {
  header,
  main,
  footer {
    padding-left: 28px;
    padding-right: 28px;
  }
}