:root {
  --header-height: 5.5rem;
  --page-bg: #07121a;
  --page-surface: rgba(12, 32, 45, 0.86);
  --page-surface-strong: rgba(12, 32, 45, 0.96);
  --page-text: #e8f3f8;
  --page-muted: #9bb7c4;
  --page-line: rgba(154, 196, 214, 0.18);
  --page-accent: #58d6c1;
  --page-accent-warm: #ffb36b;
  --page-shadow: 0 24px 80px rgba(0, 0, 0, 0.24);
  --page-radius: 1.5rem;
  --shell-width: min(1180px, calc(100vw - 2rem));
  --shell-narrow: min(760px, calc(100vw - 2rem));
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at top left, rgba(88, 214, 193, 0.17), transparent 30%),
    radial-gradient(circle at top right, rgba(255, 179, 107, 0.16), transparent 28%),
    linear-gradient(180deg, #07121a 0%, #081722 35%, #050d14 100%);
  color: var(--page-text);
  font-family: 'SF Pro Display', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-weight: 300;
  line-height: 1.65;
  letter-spacing: 0;
  padding-top: var(--header-height);
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  display: block;
}

main {
  position: relative;
}

.shell {
  width: var(--shell-width);
  margin: 0 auto;
}

.shell-narrow {
  width: var(--shell-narrow);
}

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 1000;
  backdrop-filter: blur(18px);
  background: rgba(5, 13, 20, 0.78);
  border-bottom: 1px solid var(--page-line);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 0;
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
}

.site-brand__mark {
  display: inline-grid;
  place-items: center;
  width: 2.8rem;
  height: 2.8rem;
  border-radius: 0.9rem;
  background: linear-gradient(135deg, rgba(88, 214, 193, 0.24), rgba(255, 179, 107, 0.26));
  border: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.08em;
}

.site-brand__text {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.site-brand__text strong,
h1,
h2,
h3 {
  font-family: 'SF Pro Display', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-weight: 250;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.site-brand__text span {
  color: var(--page-muted);
  font-size: 0.82rem;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.15rem;
}

.site-nav a {
  color: var(--page-muted);
  font-size: 0.96rem;
  transition: color 180ms ease;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--page-text);
}

.menu-toggle {
  display: none;
  border: 0;
  background: transparent;
  color: var(--page-text);
  font: inherit;
}

.hero,
.page-hero {
  padding: 4rem 0 2.5rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
  gap: 2rem;
  align-items: center;
}

.hero-copy h1,
.page-hero h1 {
  margin: 0;
  font-size: clamp(2.8rem, 5vw, 5.3rem);
}

.hero-summary,
.page-summary,
.lede {
  font-size: 1.1rem;
  color: var(--page-muted);
}

.eyebrow {
  margin: 0 0 1rem;
  color: var(--page-accent);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.78rem;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 1.75rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0.85rem 1.3rem;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--page-accent), #7de5db);
  color: #04212c;
  font-weight: 600;
}

.button-secondary {
  background: transparent;
  color: var(--page-text);
  border: 1px solid var(--page-line);
}

.hero-panel,
.card,
.faq-card,
.content-band .shell,
.page-hero .shell-narrow,
.article-layout .shell-narrow {
  position: relative;
}

.signal-map,
.metric-strip,
.card,
.faq-card,
.content-columns,
.data-points,
.page-hero .shell-narrow,
.article-body,
.footer-grid {
  background: var(--page-surface);
  border: 1px solid var(--page-line);
  border-radius: var(--page-radius);
  box-shadow: var(--page-shadow);
}

.signal-map {
  display: grid;
  gap: 1rem;
  padding: 1.5rem;
}

.signal-map__node {
  padding: 1.1rem 1.15rem;
  border-radius: 1rem;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0)),
    rgba(7, 20, 29, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.07);
}

.signal-map__node span,
.metric-strip strong,
.card h2,
.card h3,
.faq-card h2 {
  display: block;
}

.signal-map__node small,
.meta-line,
.card-kicker,
.footer-label,
.breadcrumbs {
  color: var(--page-muted);
}

.metric-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  margin-top: 2rem;
}

.metric-strip > div {
  padding: 1rem;
  background: rgba(4, 15, 22, 0.74);
}

.metric-strip strong {
  font-size: 1.6rem;
}

.content-band {
  padding: 1.25rem 0 1.5rem;
}

.content-band .shell {
  padding: 1.8rem;
}

.accent-band .shell {
  background:
    linear-gradient(135deg, rgba(88, 214, 193, 0.09), rgba(255, 179, 107, 0.07)),
    var(--page-surface-strong);
}

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

.card-grid-large {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.card,
.faq-card {
  padding: 1.35rem;
}

.card p,
.faq-card p,
.article-body p,
.article-body li,
.content-band p {
  color: var(--page-muted);
}

.text-link {
  color: var(--page-accent-warm);
}

.content-columns {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
  padding: 1.6rem;
}

.link-list,
.check-list,
.footer-links {
  margin: 1rem 0 0;
  padding-left: 1.2rem;
}

.link-list-columns {
  columns: 2;
}

.alpha-group + .alpha-group {
  margin-top: 2rem;
}

.faq-list {
  display: grid;
  gap: 1rem;
}

.article-layout {
  padding: 1rem 0 2rem;
}

.article-layout .shell-narrow {
  padding: 1.8rem;
}

.article-body {
  margin-top: 1rem;
}

.article-body blockquote {
  margin: 1.5rem 0;
  padding: 1.25rem 1.5rem;
  border-left: 3px solid var(--page-accent-warm);
  background: rgba(255, 255, 255, 0.03);
  color: var(--page-text);
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-bottom: 1rem;
  font-size: 0.9rem;
}

.data-points {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  padding: 1.4rem;
}

.data-points div {
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--page-line);
}

.data-points dt {
  margin-bottom: 0.35rem;
  color: var(--page-muted);
}

.site-footer {
  padding: 2rem 0 2.5rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, minmax(0, 1fr));
  gap: 1rem;
  padding: 1.8rem;
}

.footer-bottom {
  padding: 1rem 0 0;
  color: var(--page-muted);
  font-size: 0.9rem;
}

@media (max-width: 980px) {
  .hero-grid,
  .card-grid,
  .content-columns,
  .footer-grid,
  .data-points {
    grid-template-columns: 1fr;
  }

  .card-grid-large {
    grid-template-columns: 1fr;
  }

  .site-header__inner {
    align-items: center;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: fixed;
    top: var(--header-height);
    right: 0;
    left: 0;
    display: none;
    flex-direction: column;
    align-items: flex-start;
    padding: 1rem;
    background: rgba(5, 13, 20, 0.97);
    border-bottom: 1px solid var(--page-line);
  }

  .site-nav.is-open {
    display: flex;
  }
}

@media (max-width: 720px) {
  .hero,
  .page-hero {
    padding-top: 2.25rem;
  }

  .hero-copy h1,
  .page-hero h1 {
    font-size: clamp(2.2rem, 11vw, 3.6rem);
  }

  .shell,
  .shell-narrow {
    width: min(calc(100vw - 1rem), 100%);
  }

  .content-band .shell,
  .page-hero .shell-narrow,
  .article-layout .shell-narrow {
    padding: 1.25rem;
  }
}