:root {
  color-scheme: light;
  --ink: #1d1d1f;
  --muted: #6e6e73;
  --hairline: rgba(29, 29, 31, 0.12);
  --surface: #ffffff;
  --canvas: #f5f5f7;
  --blue: #0071e3;
  --green: #128a58;
  --shadow: 0 28px 70px rgba(0, 0, 0, 0.14);
  --page: min(1180px, calc(100vw - 48px));
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--canvas);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "PingFang SC", "Helvetica Neue", sans-serif;
  letter-spacing: 0;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }
button { font: inherit; }
.skip-link {
  position: fixed;
  z-index: 100;
  top: 8px;
  left: 8px;
  padding: 10px 14px;
  background: var(--ink);
  color: white;
  transform: translateY(-160%);
}
.skip-link:focus { transform: translateY(0); }

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  border-bottom: 1px solid rgba(29, 29, 31, 0.08);
  background: rgba(245, 245, 247, 0.82);
  backdrop-filter: saturate(180%) blur(18px);
}
.nav-shell {
  width: var(--page);
  min-height: 54px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 24px;
}
.brand { min-height: 44px; display: inline-flex; align-items: center; gap: 10px; font-size: 14px; font-weight: 600; }
.brand-mark {
  width: 28px;
  height: 28px;
  display: inline-grid;
  place-items: center;
  flex: 0 0 auto;
  border-radius: 7px;
  color: white;
  background: var(--ink);
  font-size: 14px;
  font-weight: 700;
}
.nav-links { display: flex; gap: 30px; font-size: 12px; color: #424245; }
.nav-links a:hover { color: var(--blue); }
.install-button {
  justify-self: end;
  border: 0;
  border-radius: 999px;
  padding: 7px 14px;
  background: var(--blue);
  color: white;
  cursor: pointer;
}

.hero {
  min-height: calc(100svh - 54px);
  padding: clamp(64px, 10vh, 110px) 0 60px;
  overflow: hidden;
}
.hero-copy { width: min(850px, calc(100vw - 40px)); margin: 0 auto 58px; text-align: center; }
.eyebrow { margin: 0 0 16px; color: var(--green); font-size: 13px; font-weight: 650; text-transform: uppercase; }
h1, h2, h3, p { letter-spacing: 0; }
h1 { margin: 0; font-size: clamp(64px, 9vw, 116px); line-height: 0.94; font-weight: 700; }
.hero-deck { max-width: 740px; margin: 28px auto 0; color: #424245; font-size: clamp(21px, 3vw, 30px); line-height: 1.34; font-weight: 500; }
.hero-actions { margin-top: 32px; display: flex; justify-content: center; align-items: center; flex-wrap: wrap; gap: 24px; }
.primary-action, .secondary-action {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0;
  border-radius: 999px;
  padding: 11px 22px;
  background: var(--blue);
  color: white;
  cursor: pointer;
  font-size: 15px;
}
.text-action { min-height: 44px; display: inline-flex; align-items: center; color: var(--blue); font-size: 17px; }
.text-action:hover { text-decoration: underline; }
.availability { margin: 20px 0 0; color: var(--muted); font-size: 13px; }
.product-visual { width: var(--page); margin: 0 auto; text-align: center; }
.product-visual img { display: block; width: 100%; height: auto; border-radius: 8px; box-shadow: var(--shadow); }
.product-visual figcaption { margin-top: 16px; color: var(--muted); font-size: 12px; }

.principle-band {
  min-height: 92px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 30px;
  border-block: 1px solid var(--hairline);
  background: var(--surface);
  color: #424245;
  font-size: 14px;
}
.principle-band p { margin: 0; }
.principle-band span { width: 4px; height: 4px; border-radius: 50%; background: #b9b9bd; }

.section { width: var(--page); margin: 0 auto; padding: 140px 0; }
.section-intro { max-width: 820px; }
h2 { margin: 0; font-size: clamp(42px, 6vw, 72px); line-height: 1.04; font-weight: 650; }
h3 { margin: 0 0 10px; font-size: 22px; line-height: 1.25; }
.workflow-list { margin: 80px 0 0; padding: 0; list-style: none; border-top: 1px solid var(--hairline); }
.workflow-list li { display: grid; grid-template-columns: 100px 1fr; gap: 34px; padding: 38px 0; border-bottom: 1px solid var(--hairline); }
.step-number { color: var(--muted); font-variant-numeric: tabular-nums; }
.workflow-list p { max-width: 760px; margin: 0; color: var(--muted); font-size: 18px; line-height: 1.6; }

.safety { display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(320px, 0.7fr); gap: 100px; align-items: end; }
.safety-copy > p:not(.eyebrow) { max-width: 700px; color: #424245; font-size: 19px; line-height: 1.65; }
.safety-copy .risk-note { color: var(--muted); font-size: 13px; }
.safety-facts { margin: 0; border-top: 1px solid var(--hairline); }
.safety-facts div { display: flex; justify-content: space-between; gap: 24px; padding: 18px 0; border-bottom: 1px solid var(--hairline); }
.safety-facts dt { color: var(--muted); }
.safety-facts dd { margin: 0; text-align: right; font-weight: 600; }

.data-section { border-top: 1px solid var(--hairline); }
.data-grid { margin-top: 76px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 54px; }
.data-grid article { border-top: 3px solid var(--ink); padding-top: 24px; }
.metric { margin: 0 0 42px; color: var(--green); font-size: 14px; font-weight: 650; }
.data-grid p:last-child { color: var(--muted); line-height: 1.6; }

.plans { width: 100%; padding-inline: max(24px, calc((100vw - 1180px) / 2)); background: var(--ink); color: white; }
.plans .eyebrow { color: #64d29b; }
.plan-grid { margin-top: 70px; display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: rgba(255,255,255,.16); }
.plan { min-height: 340px; display: flex; flex-direction: column; justify-content: space-between; gap: 30px; padding: 42px; background: #1d1d1f; }
.plan-label { margin: 0 0 18px; color: #a1a1a6; font-size: 13px; }
.plan h3 { font-size: 32px; }
.plan p:not(.plan-label) { color: #d2d2d7; line-height: 1.6; }
.plan-status { margin: 0; font-size: 13px; }
.disabled-action { align-self: flex-start; border: 1px solid rgba(255,255,255,.28); border-radius: 999px; padding: 10px 18px; background: transparent; color: #8e8e93; }
.plan-footnote { max-width: 850px; margin: 30px 0 0; color: #a1a1a6; font-size: 13px; line-height: 1.6; }

.mobile-install { width: var(--page); margin: 0 auto; padding: 120px 0; display: grid; grid-template-columns: 1fr auto; gap: 30px 80px; align-items: end; }
.mobile-install > div { max-width: 780px; }
.mobile-install p:not(.eyebrow) { color: var(--muted); font-size: 17px; line-height: 1.6; }
.secondary-action { background: var(--ink); }
.install-status { grid-column: 1 / -1; min-height: 24px; margin: 0; color: var(--green); }

footer { padding: 48px max(24px, calc((100vw - 1180px) / 2)); border-top: 1px solid var(--hairline); background: var(--surface); }
.footer-brand { display: flex; align-items: center; gap: 12px; }
.footer-brand p { margin: 0; line-height: 1.3; }
.footer-brand span { color: var(--muted); font-size: 12px; }
.footer-links { margin: 32px 0 18px; display: flex; flex-wrap: wrap; gap: 24px; color: var(--muted); font-size: 13px; }
.footer-links a { min-height: 44px; display: inline-flex; align-items: center; }
.footer-links a:hover { color: var(--blue); }
.copyright { margin: 0; color: var(--muted); font-size: 12px; }

@media (max-width: 760px) {
  :root { --page: calc(100vw - 32px); }
  .nav-shell { grid-template-columns: 1fr auto; }
  .nav-links { display: none; }
  .hero { min-height: auto; padding-top: 72px; }
  h1 { font-size: clamp(56px, 18vw, 82px); }
  .hero-deck { font-size: 22px; }
  .product-visual { width: calc(100vw - 18px); }
  .product-visual img { border-radius: 6px; }
  .principle-band { padding: 24px 20px; gap: 12px; flex-wrap: wrap; }
  .section { padding: 92px 0; }
  h2 { font-size: 43px; }
  .workflow-list { margin-top: 54px; }
  .workflow-list li { grid-template-columns: 52px 1fr; gap: 12px; }
  .workflow-list p { font-size: 16px; }
  .safety { grid-template-columns: 1fr; gap: 46px; }
  .data-grid, .plan-grid { grid-template-columns: 1fr; }
  .data-grid { gap: 42px; }
  .metric { margin-bottom: 20px; }
  .plans { padding-inline: 20px; }
  .plan { min-height: 300px; padding: 30px 24px; }
  .mobile-install { padding: 88px 0; grid-template-columns: 1fr; align-items: start; }
  .secondary-action { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}