:root {
  --bg: #f4f4f5;
  --panel: #fff;
  --text: #25262a;
  --muted: #696b72;
  --line: #d8d9dc;
  --accent: #f45a12;
  --accent-dark: #cf4305;
  --ink: #202126;
  --shadow: 0 22px 70px rgba(27, 29, 34, .14);
  color-scheme: light;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--text); background: var(--bg); font-size: 16px; }
a { color: inherit; }
img { display: block; max-width: 100%; }
.shell { min-height: 100vh; }
.topbar { position: sticky; top: 0; z-index: 20; border-bottom: 1px solid rgba(216,217,220,.9); background: rgba(244,244,245,.9); backdrop-filter: blur(18px); }
.nav { width: min(1120px, calc(100% - 40px)); min-height: 64px; margin: auto; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 11px; text-decoration: none; font-size: 18px; font-weight: 780; }
.logo { width: 36px; height: 36px; display: grid; place-items: center; border-radius: 8px; background: var(--ink); color: #fff; font-size: 14px; font-weight: 850; }
.navlinks { display: flex; align-items: center; gap: 20px; color: var(--muted); font-size: 14px; }
.navlinks a { text-decoration: none; }
.navlinks a:hover { color: var(--text); }
.button { display: inline-flex; min-height: 44px; align-items: center; justify-content: center; padding: 0 19px; border: 1px solid transparent; border-radius: 8px; text-decoration: none; font-weight: 730; }
.button.primary { color: #fff; background: var(--accent-dark); box-shadow: 0 10px 24px rgba(207,67,5,.22); }
.button.primary:hover { background: #a93503; }
.button.secondary { background: var(--panel); border-color: var(--line); }
.skip-link { position: fixed; top: 10px; left: 10px; z-index: 100; padding: 10px 14px; border-radius: 6px; color: #fff; background: var(--ink); transform: translateY(-160%); }
.skip-link:focus { transform: translateY(0); }
a:focus-visible, summary:focus-visible { outline: 3px solid var(--ink); outline-offset: 3px; }
.breadcrumb { width: min(1120px, calc(100% - 40px)); margin: 0 auto; padding-top: 28px; color: var(--muted); font-size: 14px; }
.breadcrumb a { text-underline-offset: 3px; }
.hero { width: min(1120px, calc(100% - 40px)); margin: 0 auto; padding: 48px 0 76px; display: grid; grid-template-columns: minmax(0,.9fr) minmax(480px,1.1fr); align-items: center; gap: 52px; }
.eyebrow { display: inline-flex; padding: 7px 11px; border: 1px solid var(--line); border-radius: 999px; background: var(--panel); color: var(--muted); font-size: 13px; font-weight: 680; }
h1 { margin: 22px 0 18px; font-size: clamp(42px,5.8vw,72px); line-height: .98; letter-spacing: -.035em; }
.lead { max-width: 620px; margin: 0; color: var(--muted); font-size: 21px; line-height: 1.48; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.note { margin: 16px 0 0; color: var(--muted); font-size: 14px; line-height: 1.5; }
.window { overflow: hidden; margin: 0; border: 1px solid #cfd0d4; border-radius: 14px; background: #ececef; box-shadow: var(--shadow); }
.window img { width: 100%; height: auto; }
.section { width: min(1040px, calc(100% - 40px)); margin: 0 auto; padding: 80px 0; }
.section[id] { scroll-margin-top: 80px; }
.section + .section { border-top: 1px solid var(--line); }
.section-head { max-width: 760px; margin-bottom: 34px; }
h2 { margin: 0 0 14px; font-size: clamp(31px,4vw,48px); line-height: 1.06; letter-spacing: -.025em; }
.section-head p, .prose p, .card p, .faq p { color: var(--muted); line-height: 1.68; }
.grid-3 { display: grid; grid-template-columns: repeat(3,1fr); gap: 18px; }
.grid-2 { display: grid; grid-template-columns: repeat(2,1fr); gap: 18px; }
.card { padding: 26px; border: 1px solid var(--line); border-radius: 14px; background: var(--panel); }
.card h3 { margin: 0 0 10px; font-size: 20px; line-height: 1.25; }
.card p { margin: 0; }
.fact-list { display: grid; gap: 0; overflow: hidden; margin: 0; border: 1px solid var(--line); border-radius: 14px; background: var(--panel); }
.fact-row { display: grid; grid-template-columns: minmax(150px,.34fr) minmax(0,1fr); gap: 24px; padding: 20px 24px; }
.fact-row + .fact-row { border-top: 1px solid var(--line); }
.fact-row dt { font-weight: 750; line-height: 1.5; }
.fact-row dd { margin: 0; color: var(--muted); line-height: 1.6; }
.example-doc { margin: 0; padding: 26px; border: 1px solid var(--line); border-radius: 14px; background: var(--panel); }
.example-doc h3 { margin: 0 0 16px; font-size: 20px; }
.example-doc dl { display: grid; grid-template-columns: minmax(130px,.3fr) minmax(0,1fr); gap: 12px 24px; margin: 0; }
.example-doc dt { font-weight: 750; }
.example-doc dd { margin: 0; color: var(--muted); line-height: 1.55; }
.caption { margin: 14px 0 0; color: var(--muted); font-size: 14px; line-height: 1.55; }
.step { color: var(--accent-dark); font-size: 13px; font-weight: 800; letter-spacing: .08em; }
.proof { display: grid; grid-template-columns: minmax(0,1.15fr) minmax(300px,.85fr); gap: 42px; align-items: center; }
.checklist { margin: 22px 0 0; padding: 0; list-style: none; }
.checklist li { position: relative; padding: 10px 0 10px 30px; line-height: 1.5; }
.checklist li::before { content: "✓"; position: absolute; left: 0; color: var(--accent-dark); font-weight: 800; }
.prose { max-width: 780px; }
.prose h2 { margin-top: 54px; }
.prose h3 { margin: 32px 0 8px; font-size: 22px; }
.prose p { margin: 0 0 18px; }
.faq { display: grid; gap: 12px; }
.faq details { padding: 20px 22px; border: 1px solid var(--line); border-radius: 12px; background: var(--panel); }
.faq summary { cursor: pointer; font-weight: 720; line-height: 1.35; }
.faq p { margin: 12px 0 0; }
.related { display: grid; grid-template-columns: repeat(3,1fr); gap: 14px; }
.related a { padding: 20px; border: 1px solid var(--line); border-radius: 12px; background: var(--panel); text-decoration: none; font-weight: 700; line-height: 1.35; }
.related a:hover { border-color: var(--accent); }
.download { width: min(1040px, calc(100% - 40px)); margin: 24px auto 80px; padding: 34px; display: flex; align-items: center; justify-content: space-between; gap: 24px; border-radius: 16px; color: #fff; background: var(--ink); }
.download h2 { font-size: 32px; }
.download p { margin: 8px 0 0; color: #c7c8cc; line-height: 1.5; }
footer { width: min(1120px, calc(100% - 40px)); margin: auto; padding: 26px 0 44px; display: flex; justify-content: space-between; gap: 20px; border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; }
footer a { text-underline-offset: 3px; }

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; padding-top: 34px; }
  .hero-copy { max-width: 760px; }
  .proof { grid-template-columns: 1fr; }
  .grid-3, .related { grid-template-columns: 1fr 1fr; }
  .navlinks > a:not(.button) { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

@media (max-width: 620px) {
  .nav, .breadcrumb, .hero, .section, .download, footer { width: min(100% - 28px, 1120px); }
  .hero { padding-bottom: 54px; gap: 32px; }
  h1 { font-size: 40px; overflow-wrap: break-word; }
  .lead { font-size: 18px; }
  .grid-2, .grid-3, .related { grid-template-columns: 1fr; }
  .fact-row, .example-doc dl { grid-template-columns: 1fr; gap: 6px; }
  .section { padding: 58px 0; }
  .download { align-items: flex-start; flex-direction: column; padding: 28px; }
  footer { flex-direction: column; }
}