:root {
  --ink: #eef6ff;
  --muted: #a9b9ca;
  --navy: #07111f;
  --navy-2: #0b192a;
  --line: #203248;
  --cyan: #22d3ee;
  --cyan-dark: #073746;
  --gold: #eab308;
  --max: 1200px;
  --radius: 1.125rem;
  --shadow: 0 20px 56px rgba(0, 0, 0, 0.2);
  --space-1: 0.5rem;
  --space-2: 0.75rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2rem;
  --space-6: 3rem;
  --space-7: 4rem;
  --space-8: 5rem;
  --space-9: 6rem;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--navy);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: clamp(1rem, 0.95rem + 0.15vw, 1.0625rem);
  line-height: 1.68;
}

a {
  color: inherit;
  text-underline-offset: 0.2em;
}

a:hover {
  text-decoration-color: var(--cyan);
}

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

.shell {
  width: min(calc(100% - 3rem), var(--max));
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: var(--space-1);
  left: var(--space-1);
  padding: 0.75rem 1rem;
  background: #fff;
  color: #000;
  transform: translateY(-150%);
}

.skip-link:focus {
  transform: none;
}

.site-header {
  position: relative;
  z-index: 20;
  border-bottom: 1px solid var(--line);
  background: rgba(7, 17, 31, 0.96);
}

.header-inner {
  min-height: 4.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 0.18rem;
  font-size: 0.9rem;
  font-weight: 800;
  letter-spacing: 0.17em;
  text-decoration: none;
}

.wordmark span {
  display: grid;
  place-items: center;
  width: 1.875rem;
  height: 1.875rem;
  margin-right: 0.25rem;
  border: 1px solid var(--cyan);
  border-radius: 0.5rem;
  color: var(--cyan);
}

.primary-nav {
  display: flex;
  align-items: center;
  gap: clamp(1.75rem, 2.2vw, 2.25rem);
}

.primary-nav > a:not(.button) {
  color: #c5d1df;
  font-size: 0.9375rem;
  font-weight: 560;
  text-decoration: none;
}

.primary-nav > a:hover {
  color: #fff;
}

.menu-toggle {
  display: none;
  width: 2.75rem;
  height: 2.75rem;
  border: 1px solid var(--line);
  border-radius: 0.65rem;
  background: transparent;
}

.menu-toggle span:not(.sr-only),
.menu-toggle span:not(.sr-only)::before,
.menu-toggle span:not(.sr-only)::after {
  display: block;
  width: 1.2rem;
  height: 2px;
  margin: auto;
  background: #fff;
  content: "";
}

.menu-toggle span:not(.sr-only)::before {
  transform: translateY(-6px);
}

.menu-toggle span:not(.sr-only)::after {
  transform: translateY(4px);
}

.button {
  display: inline-flex;
  min-height: 3rem;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  padding: 0.75rem 1.25rem;
  border: 1px solid var(--cyan);
  border-radius: 0.7rem;
  background: var(--cyan);
  box-shadow: 0 8px 24px rgba(34, 211, 238, 0.1);
  color: #03131b;
  font-weight: 780;
  line-height: 1.15;
  text-decoration: none;
  transition: background-color 160ms ease, border-color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

.button:hover {
  border-color: #67e8f9;
  background: #67e8f9;
  box-shadow: 0 10px 28px rgba(34, 211, 238, 0.18);
  transform: translateY(-1px);
}

.button:active {
  transform: translateY(0);
}

.button-secondary {
  border-color: #3b536e;
  background: rgba(11, 25, 42, 0.72);
  box-shadow: none;
  color: var(--ink);
}

.button-secondary:hover {
  border-color: var(--cyan);
  background: var(--cyan-dark);
}

.button-small {
  min-height: 2.75rem;
  padding: 0.68rem 1.05rem;
  border-radius: 0.65rem;
  font-size: 0.875rem;
}

.hero {
  position: relative;
  overflow: hidden;
  padding: clamp(3rem, 5.3vw, 4.75rem) 0 clamp(3rem, 5vw, 4.5rem);
}

.hero::before {
  position: absolute;
  inset: -28% auto auto 58%;
  width: 31rem;
  height: 31rem;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(34, 211, 238, 0.11), transparent 68%);
  content: "";
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(21rem, 0.92fr);
  gap: clamp(3.5rem, 5.5vw, 4.75rem);
  align-items: start;
}

.eyebrow {
  margin: 0 0 var(--space-3);
  color: var(--gold);
  font-size: clamp(0.8125rem, 0.76rem + 0.15vw, 0.9375rem);
  font-weight: 820;
  letter-spacing: 0.17em;
  line-height: 1.35;
}

.hero h1,
.page-hero h1 {
  max-width: 18ch;
  margin: 0;
  font-size: clamp(3.1rem, 4.2vw, 4.35rem);
  line-height: 1.065;
  letter-spacing: -0.04em;
}

.lead {
  max-width: 65ch;
  margin: var(--space-4) 0 0;
  color: #c2cedc;
  font-size: clamp(1.025rem, 0.97rem + 0.2vw, 1.1875rem);
  line-height: 1.65;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-5);
}

.hero-actions .button {
  min-height: 3.125rem;
  padding-inline: 1.4rem;
}

.architecture {
  position: relative;
  margin-top: 0.125rem;
  padding: 0.875rem;
  border: 1px solid var(--line);
  border-radius: 1.35rem;
  background: linear-gradient(145deg, rgba(17, 35, 55, 0.92), rgba(8, 20, 35, 0.88));
  box-shadow: var(--shadow);
}

.architecture .eyebrow {
  margin: 0.4rem 0 0.8rem 0.35rem;
  font-size: 0.8125rem;
}

.architecture ol {
  display: grid;
  gap: 0.625rem;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: flow;
}

.architecture li {
  position: relative;
  padding: 1rem 1rem 1rem 3.7rem;
  border: 1px solid var(--line);
  border-radius: 0.875rem;
  background: rgba(7, 17, 31, 0.62);
  counter-increment: flow;
}

.architecture li::before {
  position: absolute;
  top: 0.9rem;
  left: 0.9rem;
  display: grid;
  width: 1.9rem;
  height: 1.9rem;
  place-items: center;
  border-radius: 0.55rem;
  background: var(--cyan-dark);
  color: var(--cyan);
  content: "0" counter(flow);
  font-size: 0.77rem;
  font-weight: 800;
}

.architecture li:not(:last-child)::after {
  position: absolute;
  z-index: 1;
  bottom: -0.75rem;
  left: 1.82rem;
  color: var(--gold);
  content: "↓";
}

.architecture strong {
  display: block;
  font-size: 0.96rem;
  line-height: 1.35;
}

.architecture span {
  display: block;
  margin-top: 0.12rem;
  color: var(--muted);
  font-size: 0.85rem;
  line-height: 1.5;
}

.section {
  padding: clamp(var(--space-7), 6.5vw, var(--space-9)) 0;
}

.section-compact {
  padding: clamp(var(--space-6), 4.5vw, var(--space-7)) 0;
}

.section-alt {
  border-block: 1px solid var(--line);
  background: var(--navy-2);
}

.section-head {
  display: grid;
  grid-template-columns: minmax(15rem, 0.72fr) minmax(0, 1.28fr);
  gap: var(--space-5);
  margin-bottom: var(--space-6);
}

.section h2,
.cta-band h2 {
  margin: 0.1rem 0 var(--space-3);
  font-size: clamp(2.25rem, 3.5vw, 3.35rem);
  line-height: 1.13;
  letter-spacing: -0.035em;
}

.section-head p:last-child {
  max-width: 65ch;
  margin: 0;
  color: var(--muted);
}

.trust-line {
  padding: 1.1rem 0;
  border-block: 1px solid var(--line);
  color: #cbd7e5;
  text-align: center;
}

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

.info-card {
  position: relative;
  min-width: 0;
  padding: var(--space-4);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(11, 25, 42, 0.65);
}

.info-card h3 {
  margin: 0.2rem 0 0.7rem;
  font-size: clamp(1.25rem, 1.05rem + 0.45vw, 1.55rem);
  line-height: 1.3;
}

.info-card h3 a {
  text-decoration: none;
}

.info-card p {
  color: var(--muted);
}

.card-index {
  margin: 0;
  color: var(--cyan) !important;
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.13em;
}

.text-link {
  font-weight: 720;
  text-decoration-color: var(--cyan);
  text-underline-offset: 0.25rem;
}

.split {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(var(--space-5), 6vw, var(--space-8));
  align-items: start;
}

.prose {
  max-width: 70ch;
}

.prose h2 {
  margin-top: var(--space-5);
}

.prose h3 {
  margin-top: var(--space-5);
}

.prose p,
.prose li {
  color: #c2cedc;
}

.check-list,
.step-list {
  display: grid;
  gap: var(--space-3);
  margin: 0;
  padding: 0;
  list-style: none;
}

.check-list li,
.step-list li {
  padding: 1rem 1rem 1rem 3rem;
  border-left: 2px solid var(--cyan);
  background: var(--navy-2);
}

.check-list li::before {
  float: left;
  margin-left: -2rem;
  color: var(--cyan);
  content: "✓";
}

.metric-row {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  border: 1px solid var(--line);
  background: var(--line);
}

.metric-row div {
  padding: 1.3rem;
  background: var(--navy);
}

.metric-row strong {
  display: block;
  color: var(--cyan);
  font-size: 1rem;
}

.metric-row span {
  color: var(--muted);
  font-size: 0.875rem;
}

.page-hero {
  padding: clamp(3rem, 5vw, 4.5rem) 0 clamp(3rem, 4.5vw, 4rem);
  border-bottom: 1px solid var(--line);
}

.page-hero h1 {
  max-width: 20ch;
  font-size: clamp(2.65rem, 4.5vw, 4.25rem);
}

.breadcrumb {
  padding-top: 1rem;
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  color: var(--muted);
  font-size: 0.8125rem;
  list-style: none;
}

.breadcrumb li:not(:last-child)::after {
  margin-left: 0.5rem;
  color: #60758c;
  content: "/";
}

.breadcrumb a {
  text-decoration: none;
}

.related-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-2);
}

.related-links a {
  display: flex;
  min-height: 3.25rem;
  justify-content: space-between;
  gap: var(--space-3);
  padding: 0.9rem 1rem;
  border: 1px solid var(--line);
  border-radius: 0.7rem;
  text-decoration: none;
}

.related-links a:hover {
  border-color: var(--cyan);
  background: rgba(7, 55, 70, 0.3);
}

.external-card {
  padding: clamp(var(--space-4), 3.5vw, var(--space-6));
  border: 1px solid var(--cyan);
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--cyan-dark), var(--navy-2));
}

.external-label {
  display: inline-flex;
  gap: 0.4rem;
  color: var(--cyan);
  font-size: 0.8125rem;
  font-weight: 800;
  letter-spacing: 0.1em;
}

.notice {
  padding: 1rem 1.2rem;
  border-left: 3px solid var(--gold);
  background: #171b20;
  color: #d6d5cf;
}

.cta-band {
  padding: clamp(var(--space-6), 5vw, var(--space-7)) 0;
  border-block: 1px solid var(--line);
  background: linear-gradient(105deg, #0b2234, var(--navy-2));
}

.cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
}

.cta-inner p:not(.eyebrow) {
  max-width: 64ch;
  color: var(--muted);
}

.site-footer {
  padding-top: clamp(3.5rem, 5vw, 4.5rem);
  background: #040b14;
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(16rem, 1.35fr) minmax(9rem, 0.65fr) minmax(14rem, 0.9fr);
  gap: clamp(var(--space-5), 5vw, var(--space-8));
}

.footer-grid p {
  max-width: 31ch;
  margin: 1rem 0 0;
  color: var(--muted);
  font-size: 0.9375rem;
}

.footer-grid nav {
  display: grid;
  align-content: start;
  gap: 0.55rem;
}

.footer-grid nav a {
  width: fit-content;
  color: #c6d2df;
  font-size: 0.9375rem;
  font-weight: 560;
  text-decoration: none;
}

.footer-grid nav a:hover {
  color: var(--cyan);
}

.footer-base {
  display: flex;
  justify-content: space-between;
  gap: var(--space-5);
  margin-top: var(--space-6);
  padding: 1.1rem 0;
  border-top: 1px solid var(--line);
  color: #8194a8;
  font-size: 0.78rem;
}

.sr-only {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

:focus-visible {
  outline: 3px solid var(--gold);
  outline-offset: 4px;
}

@media (max-width: 1120px) {
  .primary-nav {
    gap: 1.35rem;
  }

  .header-inner {
    gap: 1.5rem;
  }

  .hero-grid {
    grid-template-columns: minmax(0, 1fr) minmax(20rem, 0.82fr);
    gap: 3rem;
  }

  .hero h1 {
    font-size: clamp(2.95rem, 4.7vw, 3.95rem);
  }
}

@media (max-width: 920px) {
  .primary-nav {
    position: absolute;
    top: 4.75rem;
    right: 0;
    left: 0;
    display: grid;
    align-items: stretch;
    gap: 0.25rem;
    padding: 1rem max(1.5rem, calc((100vw - var(--max)) / 2));
    border-bottom: 1px solid var(--line);
    background: var(--navy);
  }

  .js .menu-toggle {
    display: block;
  }

  .js .primary-nav {
    display: none;
  }

  .js .primary-nav.is-open {
    display: grid;
  }

  .primary-nav a {
    min-height: 2.75rem;
    padding: 0.65rem;
  }

  .primary-nav .button {
    margin-top: 0.35rem;
  }

  .hero {
    padding-block: var(--space-7);
  }

  .hero-grid,
  .section-head,
  .split {
    grid-template-columns: 1fr;
  }

  .hero-grid {
    gap: var(--space-6);
  }

  .hero h1 {
    max-width: 15ch;
    font-size: clamp(2.85rem, 7vw, 3.9rem);
  }

  .architecture {
    width: min(100%, 42rem);
  }

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

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

  .footer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-5);
  }

  .footer-grid > div {
    grid-column: 1 / -1;
  }
}

@media (max-width: 700px) {
  .shell {
    width: min(calc(100% - 2rem), var(--max));
  }

  .header-inner {
    min-height: 4.5rem;
  }

  .primary-nav {
    top: 4.5rem;
    padding-inline: 1rem;
  }

  .hero {
    padding-block: clamp(3rem, 10vw, 4rem);
  }

  .hero-grid {
    gap: var(--space-5);
  }

  .hero h1,
  .page-hero h1 {
    font-size: clamp(2.55rem, 10.5vw, 3.65rem);
    line-height: 1.08;
  }

  .hero .lead {
    margin-top: 1.25rem;
  }

  .hero-actions {
    margin-top: var(--space-4);
  }

  .architecture {
    padding: 0.75rem;
  }

  .section {
    padding-block: clamp(3.25rem, 12vw, 4rem);
  }

  .section-compact {
    padding-block: 3rem;
  }

  .section-head {
    gap: var(--space-3);
    margin-bottom: var(--space-5);
  }

  .section h2,
  .cta-band h2 {
    font-size: clamp(2rem, 8vw, 2.75rem);
  }

}

@media (max-width: 520px) {
  .shell {
    width: min(calc(100% - 1.5rem), var(--max));
  }

  .wordmark {
    font-size: 0.84rem;
  }

  .hero h1,
  .page-hero h1 {
    max-width: none;
    font-size: clamp(2.05rem, 9.1vw, 2.55rem);
  }

  .eyebrow {
    margin-bottom: 0.85rem;
    font-size: 0.78rem;
  }

  .hero-actions {
    display: grid;
  }

  .button {
    width: 100%;
    min-height: 2.875rem;
  }

  .architecture li {
    padding: 0.9rem 0.8rem 0.9rem 3.45rem;
  }

  .architecture li::before {
    left: 0.8rem;
  }

  .architecture li:not(:last-child)::after {
    left: 1.72rem;
  }

  .card-grid,
  .related-links,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .info-card {
    padding: 1.25rem;
  }

  .metric-row {
    grid-template-columns: 1fr;
  }

  .cta-inner,
  .footer-base {
    align-items: flex-start;
    flex-direction: column;
  }

  .footer-grid > div {
    grid-column: auto;
  }

  .footer-grid nav {
    gap: 0;
  }

  .footer-grid nav a {
    display: flex;
    min-height: 2.75rem;
    align-items: center;
  }

  .site-footer {
    padding-top: 3rem;
  }

  .footer-base {
    gap: 0.5rem;
    margin-top: var(--space-5);
  }
}

@media (max-height: 820px) and (min-width: 921px) {
  .hero {
    padding-block: 2.75rem;
  }

  .hero h1 {
    font-size: clamp(2.8rem, 4.1vw, 3.75rem);
  }

  .lead {
    margin-top: 1.15rem;
    font-size: 1rem;
  }

  .hero-actions {
    margin-top: 1.4rem;
  }

  .architecture {
    padding: 0.75rem;
  }

  .architecture ol {
    gap: 0.5rem;
  }

  .architecture li {
    padding-block: 0.75rem;
  }

  .architecture li::before {
    top: 0.65rem;
  }
}

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

  .button {
    transition: none;
  }
}