:root {
  --bg: #ffffff;
  --ink: #14221b;
  --muted: #3f4d45;
  --subtle: #5c6b62;
  --line: #dfe7e3;
  --brand: #1857d6;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 64px 24px 96px;
}

.doc-header {
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--line);
}

.doc-header h1 {
  font-size: 28px;
  margin: 0 0 10px;
}

.doc-meta {
  color: var(--subtle);
  font-size: 14px;
  margin: 0;
}

.doc-body h2 {
  font-size: 18px;
  margin: 36px 0 12px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.doc-body h2:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: none;
}

.doc-body h3 {
  font-size: 15px;
  margin: 20px 0 8px;
  color: var(--ink);
}

.doc-body p {
  margin: 0 0 14px;
  color: var(--muted);
  font-size: 15px;
}

.doc-body ul,
.doc-body ol {
  margin: 0 0 14px;
  padding-left: 22px;
  color: var(--muted);
  font-size: 15px;
}

.doc-body li {
  margin-bottom: 6px;
}

.doc-body strong {
  color: var(--ink);
}

.doc-body a {
  color: var(--brand);
}

.doc-links {
  margin-top: 8px;
}

.doc-link {
  display: block;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  text-decoration: none;
  color: var(--ink);
}

.doc-link .title {
  font-weight: 600;
  font-size: 16px;
  margin-bottom: 4px;
}

.doc-link .desc {
  color: var(--subtle);
  font-size: 14px;
}

.doc-link:hover .title {
  color: var(--brand);
}

footer {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 24px 48px;
  color: var(--subtle);
  font-size: 13px;
}

@media (max-width: 480px) {
  main {
    padding: 40px 16px 64px;
  }

  .doc-header h1 {
    font-size: 23px;
  }
}