:root {
  --bg: #05080c;
  --panel: #0b151d;
  --panel-soft: rgba(11, 21, 29, 0.72);
  --text: #f4fbfc;
  --muted: #9ab0b9;
  --quiet: #6c818a;
  --line: rgba(153, 215, 217, 0.16);
  --line-strong: rgba(126, 238, 234, 0.3);
  --teal: #1fe3d2;
  --teal-soft: #7ff8ef;
  --coral: #ff6259;
  --violet: #a78bfa;
  color-scheme: dark;
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", sans-serif;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  min-width: 300px;
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 82% 6%, rgba(255, 98, 89, 0.12), transparent 25rem),
    radial-gradient(circle at 12% 25%, rgba(31, 227, 210, 0.1), transparent 28rem),
    var(--bg);
}

a { color: inherit; }

.skip-link {
  position: fixed;
  z-index: 20;
  top: 12px;
  left: 12px;
  padding: 10px 14px;
  border-radius: 9px;
  color: #061011;
  background: var(--teal-soft);
  transform: translateY(-160%);
}

.skip-link:focus { transform: translateY(0); }

.seo-shell {
  width: min(1120px, calc(100% - 36px));
  margin: 0 auto;
}

.seo-header {
  position: sticky;
  z-index: 10;
  top: 0;
  border-bottom: 1px solid var(--line);
  background: rgba(5, 8, 12, 0.86);
  backdrop-filter: blur(18px);
}

.seo-nav {
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.seo-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 760;
  letter-spacing: -0.025em;
  text-decoration: none;
}

.seo-brand img {
  width: 36px;
  height: 36px;
  border-radius: 9px;
}

.seo-nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 650;
}

.seo-nav-links a { text-decoration: none; }
.seo-nav-links a:hover { color: var(--teal-soft); }

.nav-download {
  padding: 10px 14px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: var(--text);
  background: rgba(13, 28, 35, 0.75);
}

.seo-main { padding: clamp(62px, 9vw, 116px) 0 80px; }

.breadcrumbs {
  margin: 0 0 24px;
  color: var(--quiet);
  font: 700 10px/1.4 ui-monospace, "SFMono-Regular", Menlo, monospace;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.breadcrumbs a { text-decoration: none; }
.breadcrumbs a:hover { color: var(--teal-soft); }

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(280px, 0.75fr);
  align-items: center;
  gap: clamp(42px, 8vw, 104px);
}

.kicker {
  margin: 0;
  color: var(--teal-soft);
  font: 750 11px/1.4 ui-monospace, "SFMono-Regular", Menlo, monospace;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

h1, h2, h3 { text-wrap: balance; }

h1 {
  max-width: 850px;
  margin: 15px 0 0;
  font-size: clamp(44px, 7vw, 80px);
  line-height: 0.99;
  letter-spacing: -0.055em;
}

.hero-lede {
  max-width: 720px;
  margin: 24px 0 0;
  color: #b8c8ce;
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.seo-button {
  min-height: 52px;
  padding: 0 20px;
  border: 1px solid var(--line-strong);
  border-radius: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-size: 14px;
  font-weight: 760;
  text-decoration: none;
  transition: transform 180ms ease, border-color 180ms ease;
}

.seo-button:hover { transform: translateY(-2px); }

.seo-button.primary {
  border-color: transparent;
  color: #061011;
  background: linear-gradient(105deg, #eafffd, #aafff7 63%, #ffccc9 145%);
}

.seo-button.secondary { background: rgba(12, 24, 31, 0.72); }

.flow-card {
  position: relative;
  min-height: 340px;
  padding: 28px;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: 30px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background:
    radial-gradient(circle at 80% 15%, rgba(255, 98, 89, 0.18), transparent 35%),
    radial-gradient(circle at 5% 85%, rgba(31, 227, 210, 0.16), transparent 38%),
    var(--panel-soft);
  box-shadow: 0 26px 80px rgba(0, 0, 0, 0.28);
}

.flow-card::after {
  position: absolute;
  width: 180px;
  height: 180px;
  right: -70px;
  bottom: -80px;
  border: 1px solid rgba(126, 238, 234, 0.18);
  border-radius: 50%;
  content: "";
}

.flow-label {
  color: var(--quiet);
  font: 700 9px/1.4 ui-monospace, "SFMono-Regular", Menlo, monospace;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.flow-steps { display: grid; gap: 10px; }

.flow-steps span {
  min-height: 46px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  display: flex;
  align-items: center;
  gap: 11px;
  color: #c5d5da;
  background: rgba(5, 12, 17, 0.6);
  font-size: 13px;
  font-weight: 660;
}

.flow-steps i {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--teal);
  box-shadow: 0 0 12px rgba(31, 227, 210, 0.7);
}

.flow-steps span:nth-child(2) i { background: var(--violet); }
.flow-steps span:nth-child(3) i { background: var(--coral); }

.content-section {
  margin-top: clamp(76px, 11vw, 130px);
  padding-top: clamp(60px, 8vw, 90px);
  border-top: 1px solid var(--line);
}

.section-heading { max-width: 720px; }

.section-heading h2 {
  margin: 10px 0 0;
  font-size: clamp(32px, 5vw, 54px);
  line-height: 1.04;
  letter-spacing: -0.045em;
}

.section-heading p {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.7;
}

.guide-grid,
.feature-grid {
  margin-top: 36px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.guide-card,
.feature-card {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--panel-soft);
}

.guide-card span,
.feature-card .card-tag {
  color: var(--teal-soft);
  font: 750 9px/1.4 ui-monospace, "SFMono-Regular", Menlo, monospace;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.guide-card h3,
.feature-card h2,
.feature-card h3 {
  margin: 12px 0 0;
  font-size: 21px;
  line-height: 1.18;
  letter-spacing: -0.035em;
}

.guide-card p,
.feature-card p {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.65;
}

.feature-card {
  min-height: 250px;
  display: flex;
  flex-direction: column;
}

.feature-card a {
  margin-top: auto;
  padding-top: 24px;
  color: var(--teal-soft);
  font-size: 13px;
  font-weight: 760;
  text-decoration: none;
}

.feature-card a:hover { color: white; }

.copy-grid {
  margin-top: 36px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 0.55fr);
  gap: clamp(34px, 7vw, 90px);
}

.prose { color: #c3d1d6; }

.prose h2 {
  margin: 0 0 18px;
  color: var(--text);
  font-size: clamp(28px, 4vw, 40px);
  letter-spacing: -0.04em;
}

.prose h2:not(:first-child) { margin-top: 56px; }

.prose p,
.prose li {
  font-size: 16px;
  line-height: 1.75;
}

.prose ul { padding-left: 20px; }
.prose li + li { margin-top: 9px; }

.fact-card {
  height: fit-content;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--panel-soft);
}

.fact-card h2 {
  margin: 0;
  font-size: 18px;
  letter-spacing: -0.025em;
}

.fact-list {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.fact-list li {
  padding: 13px 0;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

.fact-list strong {
  display: block;
  margin-bottom: 3px;
  color: var(--text);
}

.cta-panel {
  margin-top: clamp(74px, 10vw, 120px);
  padding: clamp(30px, 6vw, 64px);
  border: 1px solid var(--line-strong);
  border-radius: 28px;
  background:
    radial-gradient(circle at 100% 0%, rgba(255, 98, 89, 0.15), transparent 34%),
    radial-gradient(circle at 0% 100%, rgba(31, 227, 210, 0.14), transparent 36%),
    var(--panel);
  text-align: center;
}

.cta-panel h2 {
  max-width: 760px;
  margin: 0 auto;
  font-size: clamp(32px, 5vw, 56px);
  line-height: 1.05;
  letter-spacing: -0.05em;
}

.cta-panel p {
  max-width: 620px;
  margin: 18px auto 0;
  color: var(--muted);
  line-height: 1.65;
}

.cta-panel .hero-actions { justify-content: center; }

.seo-footer {
  padding: 28px 0 40px;
  border-top: 1px solid var(--line);
  color: var(--quiet);
  font-size: 12px;
}

.footer-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.footer-links { display: flex; gap: 18px; }
.footer-links a { text-decoration: none; }
.footer-links a:hover { color: var(--teal-soft); }

a:focus-visible {
  border-radius: 4px;
  outline: 2px solid var(--teal-soft);
  outline-offset: 4px;
}

@media (max-width: 820px) {
  .seo-shell { width: min(100% - 28px, 680px); }
  .seo-nav { min-height: 60px; }
  .seo-nav-links > a:not(.nav-download) { display: none; }
  .hero-grid { grid-template-columns: 1fr; gap: 38px; }
  .flow-card { min-height: 300px; }
  .guide-grid, .feature-grid { grid-template-columns: 1fr; }
  .feature-card { min-height: 210px; }
  .copy-grid { grid-template-columns: 1fr; }
  .fact-card { order: -1; }
  .footer-row { align-items: flex-start; flex-direction: column; }
}

@media (max-width: 480px) {
  .seo-main { padding-top: 46px; }
  h1 { font-size: clamp(39px, 13vw, 56px); }
  .hero-lede { font-size: 16px; }
  .hero-actions { flex-direction: column; }
  .seo-button { width: 100%; }
  .flow-card { min-height: 280px; padding: 20px; border-radius: 22px; }
  .content-section { margin-top: 68px; padding-top: 52px; }
  .guide-card, .feature-card { padding: 20px; }
  .cta-panel { border-radius: 22px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0.001ms !important; }
}