:root {
  --ink: #0f172a;
  --muted: #475569;
  --bg: #f1f5f9;
  --accent: #0b3d5c;
  --link: #0b5cab;
  --card: #ffffff;
  --line: #e2e8f0;
  --soft: #f8fafc;
  --summary: #f0f9ff;
  --summary-border: #7dd3fc;
  --you: #f0fdf4;
  --you-border: #86efac;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
    Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
  font-size: 16.5px;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--link); }

.wrap {
  width: min(880px, 100%);
  margin: 0 auto;
  padding: 24px 16px 72px;
}

header.site {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 20px;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
  font-size: 0.9rem;
}

header.site .brand {
  font-weight: 700;
  text-decoration: none;
  color: var(--ink);
}

header.site nav {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

header.site nav a {
  text-decoration: none;
  color: var(--muted);
}

header.site nav a:hover { color: var(--link); }

main.doc {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 40px 44px 48px;
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.06);
}

@media (max-width: 640px) {
  main.doc { padding: 24px 18px 32px; }
  body { font-size: 16px; }
}

h1 {
  margin: 0 0 6px;
  font-size: 1.85rem;
  font-weight: 750;
  letter-spacing: -0.03em;
  line-height: 1.2;
}

h2 {
  margin: 2.2em 0 0.65em;
  padding-top: 0.55em;
  border-top: 1px solid var(--line);
  font-size: 1.22rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.3;
}

h2:first-of-type { border-top: 0; padding-top: 0; }

h3 {
  margin: 1.35em 0 0.45em;
  font-size: 1.02rem;
  font-weight: 700;
}

p, li { color: var(--ink); }

.meta {
  margin: 0 0 1.1rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.muted { color: var(--muted); }

.lead {
  font-size: 1.08rem;
  color: var(--ink);
  max-width: 42em;
}

.toc {
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px 18px;
  margin: 0 0 1.5rem;
  font-size: 0.9rem;
}

.toc strong {
  display: block;
  margin-bottom: 8px;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.toc ol { margin: 0; padding-left: 1.2rem; }
.toc li { margin: 0.28rem 0; }
.toc a { text-decoration: none; }
.toc a:hover { text-decoration: underline; }

.in-short,
.for-you {
  border-radius: 8px;
  padding: 14px 16px;
  margin: 0 0 1.1rem;
  font-size: 0.98rem;
}

.in-short {
  background: var(--summary);
  border-left: 4px solid var(--summary-border);
}

.for-you {
  background: var(--you);
  border-left: 4px solid var(--you-border);
}

.in-short strong,
.for-you strong {
  display: block;
  margin-bottom: 6px;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.in-short strong { color: var(--accent); }
.for-you strong { color: #166534; }

ul, ol { padding-left: 1.35rem; }
li { margin: 0.4rem 0; }

table.data {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0 1.25rem;
  font-size: 0.9rem;
}

table.data th,
table.data td {
  border: 1px solid var(--line);
  padding: 11px 12px;
  text-align: left;
  vertical-align: top;
}

table.data th {
  background: var(--soft);
  font-weight: 650;
}

table.data td { background: #fff; }

.glossary dt {
  font-weight: 700;
  margin-top: 0.85rem;
}

.glossary dd {
  margin: 0.25rem 0 0;
  color: var(--muted);
}

.app-list {
  list-style: none;
  padding: 0;
  margin: 16px 0 0;
}

.app-list li {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px 16px;
  margin-bottom: 10px;
}

.app-list strong { display: block; margin-bottom: 6px; }

.app-list .links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.95rem;
}

footer.site {
  margin-top: 28px;
  color: var(--muted);
  font-size: 0.85rem;
  text-align: center;
}