:root {
  color-scheme: light;
  --ink: #111827;
  --muted: #596579;
  --line: #dfe5ed;
  --surface: #ffffff;
  --soft: #f3f6fa;
  --brand: #3457d5;
  --brand-dark: #243eab;
  --max: 860px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--surface);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
}

a { color: var(--brand-dark); }

.site-header {
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.94);
}

.nav {
  width: min(var(--max), calc(100% - 40px));
  min-height: 68px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  color: var(--ink);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 1.05rem;
  font-weight: 700;
  text-decoration: none;
}

.brand img {
  width: 34px;
  height: 34px;
  border-radius: 9px;
}

.nav-links { display: flex; gap: 20px; }
.nav-links a { color: var(--muted); text-decoration: none; }
.nav-links a:hover { color: var(--ink); }

main {
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
  padding: 72px 0 84px;
}

.hero {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 56px;
  padding: 18px 0 62px;
}

.hero img {
  width: 168px;
  height: 168px;
  border-radius: 38px;
  box-shadow: 0 22px 56px rgba(17, 24, 39, 0.18);
}

.eyebrow {
  color: var(--brand);
  font-size: 0.78rem;
  font-weight: 750;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

h1 {
  max-width: 720px;
  margin: 10px 0 18px;
  font-size: clamp(2.35rem, 7vw, 4.65rem);
  line-height: 1.02;
  letter-spacing: -0.055em;
}

.document h1 { font-size: clamp(2.2rem, 6vw, 3.5rem); }
h2 { margin: 48px 0 12px; font-size: 1.55rem; letter-spacing: -0.02em; }
h3 { margin: 30px 0 8px; }

.lead {
  max-width: 680px;
  color: var(--muted);
  font-size: 1.2rem;
}

.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.download-note {
  margin-top: 12px;
  color: var(--muted);
  font-size: 0.9rem;
}
.button {
  display: inline-block;
  padding: 11px 18px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: var(--surface);
  color: var(--ink);
  font-weight: 650;
  text-decoration: none;
}
.button.primary { border-color: var(--brand); background: var(--brand); color: white; }
.button:hover { transform: translateY(-1px); }

.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 26px;
}

.card {
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 22px;
  background: var(--soft);
}
.card h2, .card h3 { margin-top: 0; }
.card p { margin-bottom: 0; color: var(--muted); }

.document { max-width: 760px; }
.document p, .document li { color: #354052; }
.document strong { color: var(--ink); }

pre {
  overflow-x: auto;
  padding: 16px 18px;
  border-radius: 12px;
  background: #111827;
  color: #eef2ff;
  font-size: 0.92rem;
}

code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }

.notice {
  margin: 28px 0;
  padding: 18px 20px;
  border-left: 4px solid var(--brand);
  border-radius: 8px;
  background: var(--soft);
}

footer {
  border-top: 1px solid var(--line);
  color: var(--muted);
}

.footer-inner {
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
  padding: 26px 0;
  display: flex;
  justify-content: space-between;
  gap: 20px;
}
.footer-inner p { margin: 0; }

@media (max-width: 700px) {
  .nav { align-items: flex-start; flex-direction: column; padding: 16px 0; }
  .nav-links { flex-wrap: wrap; gap: 10px 18px; }
  main { padding-top: 48px; }
  .hero { grid-template-columns: 1fr; gap: 34px; }
  .hero img { grid-row: 1; width: 112px; height: 112px; border-radius: 26px; }
  .grid { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; }
}