:root {
  --ink: #181c32;
  --ink-2: #343a40;
  --ink-muted: #545a70;
  --accent: #1a73e8;
  --accent-strong: #1668d0;
  --accent-deep: #1257b0;
  --accent-soft: #ddeafc;
  --bg: #f2f5f8;
  --surface: #ffffff;
  --line: #e1e3ea;
  --line-strong: #cfd6e2;
  --on-dark-muted: #b9bfd0;
  --on-dark-link: #9cc4ff;
  --radius: 14px;
  --radius-lg: 20px;
  --wrap: 1120px;
  --shadow: 0 1px 2px rgba(24, 28, 50, 0.05), 0 10px 28px rgba(24, 28, 50, 0.06);
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
}

h1, h2, h3, p, ul, ol, figure { margin: 0; }
ul, ol { padding: 0; }
svg { display: block; }

a {
  color: var(--accent-deep);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}
a:hover { color: var(--accent-strong); }
strong { color: var(--ink); font-weight: 600; }

a:focus-visible, button:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link {
  position: absolute;
  top: -90px;
  left: 16px;
  z-index: 60;
  padding: 12px 18px;
  border-radius: 0 0 10px 10px;
  background: var(--ink);
  color: #ffffff;
  font-weight: 600;
  text-decoration: none;
  transition: top 0.15s ease;
}
.skip-link:focus { top: 0; color: #ffffff; }

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: var(--surface);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px 28px;
  min-height: 68px;
  padding-top: 12px;
  padding-bottom: 12px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.01em;
  text-decoration: none;
}
.brand:hover { color: var(--ink); }
.brand-mark { width: 30px; height: 30px; flex: none; }

.site-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 2px 24px;
  margin-left: auto;
}
.site-nav a {
  padding: 6px 0;
  border-bottom: 2px solid transparent;
  color: var(--ink-2);
  font-size: 15px;
  text-decoration: none;
}
.site-nav a:hover { color: var(--accent-deep); border-bottom-color: var(--accent-soft); }
.site-nav a[aria-current="page"] { color: var(--accent-deep); border-bottom-color: var(--accent); }

a.header-cta { display: none; }
@media (min-width: 900px) { a.header-cta { display: inline-flex; } }

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 12px 24px;
  border: 1px solid transparent;
  border-radius: 10px;
  background: var(--accent-strong);
  color: #ffffff;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.2;
  text-decoration: none;
  transition: background-color 0.15s ease;
}
.button:hover { background: var(--accent-deep); color: #ffffff; }
.button-small { min-height: 40px; padding: 8px 16px; font-size: 15px; }
.button-light { background: #ffffff; color: var(--accent-deep); }
.button-light:hover { background: #eaf2ff; color: var(--accent-deep); }

.text-link {
  color: var(--accent-deep);
  font-weight: 600;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}
.text-link:hover { color: var(--accent-strong); }

section[id], #main { scroll-margin-top: 92px; }

.hero { padding: 64px 0 40px; }

.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--accent-deep);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}
.eyebrow::before { content: ""; width: 26px; height: 2px; background: var(--accent); }

h1 {
  max-width: 940px;
  margin-top: 16px;
  font-size: clamp(2.05rem, 4.6vw, 3.4rem);
  line-height: 1.12;
  letter-spacing: -0.022em;
  font-weight: 600;
}

.hero-lede {
  max-width: 640px;
  margin-top: 20px;
  color: var(--ink-muted);
  font-size: clamp(1.05rem, 1.5vw, 1.2rem);
  line-height: 1.55;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 28px;
  margin-top: 32px;
}

.hero-note { margin-top: 22px; color: var(--ink-muted); font-size: 15px; }

.section { padding: 48px 0; }

.section-head { max-width: 680px; margin-bottom: 30px; }

h2 {
  font-size: clamp(1.5rem, 2.6vw, 2rem);
  line-height: 1.22;
  letter-spacing: -0.015em;
  font-weight: 600;
}

.section-lede { margin-top: 10px; color: var(--ink-muted); font-size: 17px; }

.cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 24px;
  box-shadow: var(--shadow);
}
.card h3 { font-size: 18px; line-height: 1.35; letter-spacing: -0.01em; font-weight: 600; }
.card p { margin-top: 10px; color: var(--ink-muted); font-size: 15.5px; line-height: 1.6; }

.specs-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 10px 4px;
  box-shadow: var(--shadow);
}
.specs { list-style: none; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
.specs li {
  position: relative;
  padding: 14px 20px 14px 42px;
  color: var(--ink-2);
  font-size: 15.5px;
  line-height: 1.5;
}
.specs li::before {
  content: "";
  position: absolute;
  left: 24px;
  top: 22px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
}

.steps {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}
.step {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 24px;
  box-shadow: var(--shadow);
}
.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  margin-bottom: 16px;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent-deep);
  font-size: 15px;
  font-weight: 600;
}
.step h3 { font-size: 18px; line-height: 1.35; font-weight: 600; }
.step p { margin-top: 8px; color: var(--ink-muted); font-size: 15.5px; }

.network-note {
  max-width: 880px;
  margin-top: 24px;
  padding: 16px 20px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 4px solid var(--accent);
  border-radius: 12px;
  color: var(--ink-2);
  font-size: 15.5px;
}

.privacy-card {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  gap: 28px 48px;
  align-items: start;
  padding: 36px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}
.privacy-intro p { max-width: 46ch; margin-top: 14px; color: var(--ink-muted); font-size: 16px; }
.privacy-intro .text-link { display: inline-block; margin-top: 16px; font-size: 15.5px; }
.privacy-list { list-style: none; display: grid; gap: 18px; }
.privacy-list li {
  position: relative;
  padding-left: 24px;
  color: var(--ink-muted);
  font-size: 15.5px;
  line-height: 1.55;
}
.privacy-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
}
.privacy-list strong { display: block; margin-bottom: 2px; font-size: 16px; line-height: 1.4; }

.who-text { max-width: 760px; margin-top: 12px; color: var(--ink-muted); font-size: 17px; }

.cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  padding: 40px;
  background: var(--ink);
  border-radius: var(--radius-lg);
  box-shadow: 0 16px 40px rgba(24, 28, 50, 0.16);
}
.cta h2 { color: #ffffff; }
.cta .cta-copy p { max-width: 44ch; margin-top: 10px; color: var(--on-dark-muted); font-size: 16px; }
.cta-actions { display: flex; flex-direction: column; align-items: flex-start; gap: 12px; }
.cta .cta-mail { color: var(--on-dark-muted); font-size: 15px; }
.cta .cta-note { color: var(--on-dark-muted); font-size: 14px; margin-top: 10px; max-width: 46ch; }
.cta .cta-mail a { color: var(--on-dark-link); }
.cta .cta-mail a:hover { color: #ffffff; }
.cta a:focus-visible { outline-color: var(--on-dark-link); }

.site-footer {
  margin-top: 40px;
  background: var(--surface);
  border-top: 1px solid var(--line);
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  padding-top: 34px;
  padding-bottom: 40px;
}
.footer-brand p { max-width: 440px; margin-top: 10px; color: var(--ink-muted); font-size: 14.5px; }
.footer-nav { display: flex; flex-wrap: wrap; gap: 10px 24px; padding-top: 4px; }
.footer-nav a {
  color: var(--ink-2);
  font-size: 15px;
  text-decoration: underline;
  text-decoration-color: var(--line-strong);
  text-underline-offset: 3px;
}
.footer-nav a:hover { color: var(--accent-deep); text-decoration-color: currentColor; }

.page-wrap { max-width: 740px; padding-top: 56px; padding-bottom: 16px; }
.page-head { padding-bottom: 4px; }
.page-head h1 { margin-top: 0; font-size: clamp(2rem, 3.4vw, 2.8rem); }
.page-lede { margin-top: 14px; color: var(--ink-muted); font-size: 18px; line-height: 1.55; }
.prose { margin-top: 36px; }
.prose h2 { font-size: clamp(1.3rem, 2.2vw, 1.55rem); }
.prose p { margin-top: 12px; color: var(--ink-2); font-size: 16.5px; }
.prose .text-link { display: inline-block; margin-top: 4px; }

@media (min-width: 800px) {
  .section { padding: 58px 0; }
}
@media (min-width: 900px) {
  .page-wrap { padding-top: 72px; }
}
@media (max-width: 960px) {
  .cards, .steps { grid-template-columns: 1fr; }
}
@media (max-width: 880px) {
  .privacy-card { grid-template-columns: 1fr; gap: 24px; padding: 26px; }
}
@media (max-width: 760px) {
  .specs { grid-template-columns: 1fr; }
  .specs-card { padding: 8px 2px; }
  .specs li { padding: 12px 16px 12px 34px; }
  .specs li::before { left: 18px; top: 19px; }
}
@media (max-width: 759px) {
  .site-header { position: static; }
  .header-inner { gap: 6px 16px; }
  .site-nav { width: 100%; margin-left: 0; gap: 2px 16px; }
  .site-nav a { font-size: 14.5px; }
  section[id], #main { scroll-margin-top: 16px; }
}
@media (max-width: 600px) {
  .wrap { padding-left: 20px; padding-right: 20px; }
  .hero { padding: 44px 0 28px; }
  .hero-actions { margin-top: 26px; }
  .section { padding: 40px 0; }
  .section-head { margin-bottom: 24px; }
  .section-lede { font-size: 16px; }
  .card, .step { padding: 22px; }
  .privacy-card { padding: 22px; }
  .network-note { padding: 14px 16px; }
  .cta { padding: 26px 22px; }
  .cta-actions { width: 100%; }
  .cta-actions .button { width: 100%; }
  .footer-inner { padding-top: 28px; padding-bottom: 32px; }
  .page-wrap { padding-top: 40px; }
  .page-lede { font-size: 17px; }
  .prose { margin-top: 28px; }
  .prose p { font-size: 16px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .skip-link, .button { transition: none; }
}