:root {
  color-scheme: light dark;
  --background: #f4f7f6;
  --surface: #ffffff;
  --surface-strong: #e7f7f3;
  --ink: #0f172a;
  --muted: #52606d;
  --accent: #0b766d;
  --accent-hover: #075e58;
  --accent-ink: #ecfffb;
  --line: #dbe5e2;
  --navy: #101827;
  --shadow: 0 24px 70px rgba(15, 23, 42, 0.1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --background: #08110f;
    --surface: #101c1a;
    --surface-strong: #12302b;
    --ink: #f4fbf9;
    --muted: #aec2bd;
    --accent: #55dfc9;
    --accent-hover: #83ead9;
    --accent-ink: #08201c;
    --line: #273b37;
    --navy: #07110f;
    --shadow: 0 24px 70px rgba(0, 0, 0, 0.28);
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--background);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 17px;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}

a {
  color: var(--accent);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--accent-hover);
}

img {
  max-width: 100%;
}

.shell {
  width: min(1160px, calc(100% - 40px));
  margin: 0 auto;
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 76px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  color: var(--ink);
  font-size: 1.02rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  text-decoration: none;
}

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

.nav-links {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 20px;
  font-size: 0.9rem;
  font-weight: 650;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
}

.nav-links a:hover {
  color: var(--ink);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(320px, 0.75fr);
  gap: clamp(36px, 7vw, 92px);
  align-items: center;
  min-height: 690px;
  padding: 72px 0 92px;
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin-top: 0;
  color: var(--ink);
  line-height: 1.08;
  letter-spacing: -0.045em;
}

h1 {
  max-width: 820px;
  margin-bottom: 24px;
  font-size: clamp(3.2rem, 7.7vw, 6.7rem);
  line-height: 0.96;
}

h2 {
  max-width: 780px;
  margin-bottom: 18px;
  font-size: clamp(2rem, 4.5vw, 3.65rem);
}

h3 {
  margin-bottom: 10px;
  font-size: 1.18rem;
  letter-spacing: -0.02em;
}

p {
  margin-top: 0;
}

.lead {
  max-width: 760px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: clamp(1.06rem, 2vw, 1.3rem);
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 11px 18px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--ink);
  font-size: 0.94rem;
  font-weight: 750;
  text-decoration: none;
  transition: transform 160ms ease, background 160ms ease;
}

.button:hover {
  transform: translateY(-1px);
  color: var(--ink);
}

.button.primary {
  border-color: var(--accent);
  background: var(--accent);
  color: var(--accent-ink);
}

.button.primary:hover {
  background: var(--accent-hover);
  color: var(--accent-ink);
}

.proof-line {
  margin-top: 25px;
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 650;
}

.research-thread {
  position: relative;
  padding: 26px;
  border-radius: 28px;
  background: var(--navy);
  box-shadow: var(--shadow);
  color: #d9e8e4;
}

.thread-label {
  margin-bottom: 18px;
  color: #79ead8;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hub-brand-lockup {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 26px;
}

.hub-brand-lockup img {
  width: 84px;
  height: 84px;
  padding: 7px;
  border-radius: 20px;
  background: #ffffff;
}

.hub-brand-lockup strong,
.hub-brand-lockup span {
  display: block;
}

.hub-brand-lockup strong {
  color: #ffffff;
  font-size: 1.35rem;
}

.hub-brand-lockup span {
  margin-top: 3px;
  color: #aebfbb;
  font-size: 0.82rem;
}

.thread-item {
  position: relative;
  margin-top: 12px;
  padding: 16px 17px 16px 46px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.08);
}

.thread-item::before {
  position: absolute;
  top: 19px;
  left: 18px;
  width: 14px;
  height: 14px;
  border: 3px solid #79ead8;
  border-radius: 50%;
  content: "";
}

.thread-item strong {
  display: block;
  margin-bottom: 3px;
  color: #ffffff;
  font-size: 0.92rem;
}

.thread-item span {
  display: block;
  color: #aebfbb;
  font-size: 0.84rem;
  line-height: 1.45;
}

.section {
  padding: 92px 0;
}

.section.compact {
  padding: 70px 0;
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(300px, 0.65fr);
  gap: 48px;
  align-items: end;
  margin-bottom: 44px;
}

.section-heading p {
  color: var(--muted);
}

.surface {
  border-radius: 30px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  overflow: hidden;
}

.step {
  min-height: 260px;
  padding: 34px;
}

.step + .step {
  border-left: 1px solid var(--line);
}

.step-number {
  display: block;
  margin-bottom: 48px;
  color: var(--accent);
  font-size: 0.76rem;
  font-weight: 850;
  letter-spacing: 0.14em;
}

.step p,
.use-case p,
.trust-copy,
.fine-print {
  color: var(--muted);
}

.use-cases {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.use-case {
  min-height: 245px;
  padding: 30px;
  border-radius: 24px;
  background: var(--surface);
}

.use-case .example {
  margin: 24px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  color: var(--ink);
  font-size: 0.92rem;
  font-weight: 650;
}

.coverage {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.coverage span {
  padding: 8px 12px;
  border-radius: 999px;
  background: var(--surface-strong);
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 750;
}

.trust {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 0.65fr);
  gap: 48px;
  align-items: center;
  padding: 46px;
}

.boundary-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.boundary-list li {
  padding: 10px 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.boundary-list li::before {
  margin-right: 10px;
  color: var(--accent);
  content: "✓";
  font-weight: 900;
}

.faq {
  max-width: 880px;
}

.faq details {
  padding: 21px 0;
  border-top: 1px solid var(--line);
}

.faq summary {
  cursor: pointer;
  color: var(--ink);
  font-weight: 760;
}

.faq details p {
  margin: 14px 0 0;
  color: var(--muted);
}

.closing {
  padding: 58px;
  background: var(--navy);
  color: #d9e8e4;
}

.closing h2 {
  color: #ffffff;
}

.closing p {
  max-width: 660px;
  color: #aebfbb;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 30px;
  padding: 40px 0 56px;
  color: var(--muted);
  font-size: 0.84rem;
}

.site-footer p {
  margin: 0;
}

.site-footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

@media (max-width: 820px) {
  .hero,
  .section-heading,
  .trust {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 54px;
  }

  .steps,
  .use-cases {
    grid-template-columns: 1fr;
  }

  .step + .step {
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .nav-links a:not(.nav-primary) {
    display: none;
  }

  .site-footer {
    flex-direction: column;
  }

}

@media (max-width: 520px) {
  .shell {
    width: min(100% - 28px, 1160px);
  }

  .hero {
    padding: 42px 0 64px;
  }

  .section {
    padding: 68px 0;
  }

  .research-thread,
  .step,
  .use-case,
  .trust,
  .closing {
    padding: 24px;
  }

  .actions .button {
    width: 100%;
  }
}

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

  .button {
    transition: none;
  }
}