:root {
  color-scheme: light;
  --navy: #17324d;
  --navy-deep: #0f263d;
  --blue: #2878b8;
  --blue-bright: #4f81bd;
  --blue-soft: #e8f0f6;
  --blue-pale: #f4f8fb;
  --text: #243f60;
  --muted: #667085;
  --line: #cdd9e3;
  --white: #ffffff;
  --yellow: #ffd75a;
  --shadow: 0 18px 55px rgba(15, 38, 61, .14);
  --radius: 18px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--text);
  background: var(--white);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

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

.skip-link {
  position: fixed;
  z-index: 100;
  top: .75rem;
  left: .75rem;
  padding: .7rem 1rem;
  transform: translateY(-180%);
  background: var(--white);
  color: var(--navy);
  font-weight: 700;
  box-shadow: var(--shadow);
}

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

.shell {
  width: min(1160px, calc(100% - 3rem));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  border-bottom: 1px solid rgba(205, 217, 227, .8);
  background: rgba(255, 255, 255, .94);
  backdrop-filter: blur(14px);
}

.nav-row,
.footer-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.nav-row { min-height: 76px; }

.brand {
  display: inline-flex;
  align-items: center;
  gap: .7rem;
  color: var(--blue);
  font-size: 1.25rem;
  font-weight: 750;
  letter-spacing: -.02em;
  text-decoration: none;
}

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

.desktop-nav { display: flex; align-items: center; gap: 1.5rem; }

.desktop-nav a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  color: var(--navy);
  font-size: .92rem;
  font-weight: 600;
  text-decoration: none;
}

.desktop-nav a:hover { color: var(--blue); }
.mobile-menu { display: none; }

.hero {
  padding: clamp(3.5rem, 7vw, 7rem) 0;
  background: linear-gradient(145deg, var(--blue-pale), var(--white) 55%);
}

.hero-grid {
  display: grid;
  grid-template-columns: .84fr 1.16fr;
  align-items: center;
  gap: clamp(2.5rem, 6vw, 6rem);
}

.kicker,
.overline {
  margin: 0 0 .75rem;
  color: var(--blue);
  font-size: .78rem;
  font-weight: 750;
  letter-spacing: .12em;
  text-transform: uppercase;
}

h1, h2, h3, p, figure { margin-top: 0; }

h1, h2, h3 {
  color: var(--text);
  line-height: 1.12;
  font-weight: 750;
}

h1 {
  max-width: 620px;
  margin-bottom: 1.5rem;
  font-size: clamp(3rem, 6.2vw, 5.5rem);
  letter-spacing: -.055em;
}

h2 {
  margin-bottom: 1.35rem;
  font-size: clamp(2.25rem, 4.2vw, 4rem);
  letter-spacing: -.045em;
}

h3 { margin-bottom: .75rem; font-size: 1.3rem; }

.lead,
.large-copy {
  font-size: clamp(1.12rem, 1.7vw, 1.35rem);
  line-height: 1.5;
}

.lead { max-width: 590px; margin-bottom: 2rem; }

.hero-actions { display: flex; flex-wrap: wrap; gap: .8rem; }

.button {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: .75rem 1.1rem;
  border: 1px solid var(--blue);
  border-radius: 10px;
  font-weight: 700;
  text-decoration: none;
  transition: transform .18s ease, background-color .18s ease;
}

.button:hover { transform: translateY(-2px); }
.button-primary { background: var(--blue); color: var(--white); }
.button-primary:hover { background: #1f659c; }
.button-secondary { background: var(--white); color: var(--blue); }
.button-secondary:hover { background: var(--blue-soft); }

.hero-visual { margin: 0; }

.hero-visual img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

figcaption {
  margin-top: .75rem;
  color: var(--muted);
  font-size: .86rem;
  font-style: italic;
}

.section { padding: clamp(5rem, 9vw, 8rem) 0; scroll-margin-top: 74px; }

.section-grid {
  display: grid;
  grid-template-columns: .82fr 1.18fr;
  gap: clamp(2.5rem, 7vw, 7rem);
}

.section-heading h2 { max-width: 520px; }
.prose { max-width: 680px; }
.prose p:last-child { margin-bottom: 0; }

.comparison-panel {
  display: grid;
  grid-template-columns: 230px 1fr;
  align-items: center;
  gap: clamp(2rem, 5vw, 4.5rem);
  margin-top: 4.5rem;
  padding: clamp(1.5rem, 4vw, 3rem);
  border-left: 5px solid var(--blue);
  background: var(--blue-pale);
}

.comparison-image {
  display: grid;
  min-height: 190px;
  place-items: center;
  padding: 1.1rem;
  background: var(--white);
}

.comparison-image img { max-height: 190px; }

.soft-section { background: var(--blue-soft); }

.centred-heading { max-width: 720px; margin: 0 auto 3.5rem; text-align: center; }

.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  margin: 0;
  padding: 0;
  background: var(--line);
  list-style: none;
}

.steps li { min-height: 300px; padding: 2rem 1.5rem; background: var(--white); }

.step-number {
  display: block;
  margin-bottom: 2rem;
  color: var(--blue-bright);
  font-size: 1.65rem;
  font-variant-numeric: tabular-nums;
  font-weight: 300;
}

.phase-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-top: 3.5rem;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.phase-grid article { padding: 2.25rem; }
.phase-grid article + article { border-left: 1px solid var(--line); }
.phase-grid span { display: block; margin-bottom: 1rem; color: var(--blue); font-size: .8rem; font-weight: 750; }

.provider-section { background: var(--blue-pale); }

.provider-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  margin-top: 4rem;
}

.provider-card {
  padding: clamp(1.5rem, 3vw, 2.25rem);
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--white);
}

.provider-logo {
  height: 120px;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  margin-bottom: 1.75rem;
}

.provider-logo img {
  width: auto;
  max-width: 180px;
  max-height: 100px;
  object-fit: contain;
}

.admiralty-logo img { max-width: 220px; max-height: 120px; }

.api-summary {
  display: flex;
  align-items: baseline;
  gap: 1rem 2rem;
  margin-top: 1.25rem;
  padding: 1.4rem 1.75rem;
  border-left: 4px solid var(--blue);
  background: var(--blue-soft);
}

.api-summary strong { color: var(--text); white-space: nowrap; }

.technology-section { background: var(--white); }

.technology-visual {
  display: grid;
  grid-template-columns: 1.2fr .8fr;
  align-items: center;
  gap: clamp(2rem, 5vw, 5rem);
  margin-top: 4rem;
  padding: clamp(1.5rem, 4vw, 3rem);
  border: 1px solid var(--line);
  background: var(--blue-pale);
  color: var(--text);
}

.technology-visual img { width: 100%; max-height: 330px; object-fit: contain; }

.benefit-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  margin-top: 4rem;
  padding: 0;
  background: var(--line);
  list-style: none;
}

.benefit-list li { min-height: 190px; padding: 1.5rem; background: var(--blue-pale); }
.benefit-list strong { display: block; margin-bottom: .7rem; color: var(--blue); }
.benefit-list span { font-size: .95rem; }

.contact-section { padding: clamp(5rem, 9vw, 8rem) 0; scroll-margin-top: 74px; background: var(--blue-pale); }

.contact-grid {
  display: grid;
  grid-template-columns: 1.25fr .75fr;
  align-items: start;
  gap: clamp(3rem, 8vw, 8rem);
}

.contact-email {
  display: inline-block;
  color: var(--blue);
  font-size: clamp(1.25rem, 2vw, 1.6rem);
  font-weight: 750;
  text-underline-offset: .25em;
}

#contact-title {
  margin-bottom: .45rem;
  font-size: clamp(1.25rem, 2vw, 1.6rem);
  line-height: 1.35;
  letter-spacing: -.02em;
}

.company-card {
  display: flex;
  flex-direction: column;
  gap: .35rem;
  padding: clamp(1.5rem, 4vw, 2.5rem);
  border-top: 4px solid var(--blue);
  background: var(--white);
  box-shadow: 0 10px 30px rgba(15, 38, 61, .08);
  font-size: .9rem;
  font-style: normal;
}

.company-card strong {
  margin-bottom: .45rem;
  color: var(--text);
  font-size: 1.05rem;
}

footer { padding: 1.5rem 0; background: var(--white); color: var(--muted); font-size: .86rem; }
.footer-row p { margin: 0; }
.footer-brand { font-size: 1rem; }

@media (max-width: 900px) {
  .desktop-nav { display: none; }
  .mobile-menu { position: relative; display: block; }
  .mobile-menu summary { min-height: 44px; display: inline-flex; align-items: center; cursor: pointer; color: var(--navy); font-weight: 700; list-style: none; }
  .mobile-menu summary::-webkit-details-marker { display: none; }
  .mobile-menu nav { position: absolute; top: 50px; right: 0; width: min(280px, calc(100vw - 2rem)); padding: .6rem; border: 1px solid var(--line); border-radius: 12px; background: var(--white); box-shadow: var(--shadow); }
  .mobile-menu nav a { min-height: 46px; display: flex; align-items: center; padding: 0 .75rem; border-radius: 8px; font-weight: 650; text-decoration: none; }
  .mobile-menu nav a:hover { background: var(--blue-pale); color: var(--blue); }
  .hero-grid, .section-grid, .technology-visual { grid-template-columns: 1fr; }
  .hero-copy { max-width: 720px; }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .provider-grid { grid-template-columns: 1fr; }
  .benefit-list { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 680px) {
  .shell { width: min(100% - 2rem, 1160px); }
  .nav-row { min-height: 66px; }
  .brand img { width: 34px; height: 34px; }
  .hero { padding-top: 3.5rem; }
  h1 { font-size: clamp(2.75rem, 14vw, 4.2rem); }
  .hero-visual img { aspect-ratio: 4 / 3; }
  .comparison-panel, .contact-grid { grid-template-columns: 1fr; }
  .comparison-image { min-height: 150px; }
  .steps, .phase-grid, .benefit-list { grid-template-columns: 1fr; }
  .steps li { min-height: auto; }
  .phase-grid article + article { border-top: 1px solid var(--line); border-left: 0; }
  .benefit-list li { min-height: auto; }
  .api-summary { align-items: flex-start; flex-direction: column; }
  .api-summary strong { white-space: normal; }
  .footer-row { align-items: flex-start; flex-direction: column; gap: .7rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}