:root {
  --ink: #121212;
  --ink-2: #1d1d1d;
  --blue: #0974b0;
  --blue-deep: #012a41;
  --blue-soft: #e7f4fb;
  --red: #c42323;
  --paper: #f4f6f8;
  --white: #ffffff;
  --line: #dfe4e8;
  --muted: #5c6770;
  --text: #1c242b;
  --header: #0c0c0c;
  --shadow: 0 18px 40px rgba(12, 18, 24, 0.08);
  --sans: "Source Sans 3", "Segoe UI", sans-serif;
  --cond: "Roboto Condensed", "Arial Narrow", sans-serif;
  --max: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--text);
  background: var(--white);
  font-family: var(--sans);
  font-size: 18px;
  line-height: 1.55;
}
img { max-width: 100%; display: block; }
a { color: var(--blue); }
button, input, select, textarea { font: inherit; }
h1, h2, h3, h4 {
  font-family: var(--cond);
  letter-spacing: 0;
  line-height: 1.05;
  font-weight: 700;
  margin: 0;
}

.skip {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
.skip:focus {
  position: fixed;
  top: 8px;
  left: 8px;
  width: auto;
  height: auto;
  margin: 0;
  clip: auto;
  overflow: visible;
  background: var(--white);
  color: var(--ink);
  padding: 8px 12px;
  z-index: 50;
}

.topbar {
  background: var(--header);
  color: #c9cdd1;
  font-size: 13px;
  letter-spacing: 0.01em;
}
.topbar-inner, .nav-inner, .wrap, .subnav-inner {
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
}
.topbar-inner {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 8px 0;
}
.topbar a { color: #fff; text-decoration: none; }
.topbar a:hover { color: #8ecff0; }

.site-header {
  background: var(--header);
  position: sticky;
  top: 0;
  z-index: 30;
  border-bottom: 1px solid #242424;
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 78px;
  gap: 20px;
}
.logo img { width: 168px; height: auto; }
.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-links a {
  color: #fff;
  text-decoration: none;
  font-family: var(--cond);
  font-size: 15px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 10px 12px;
}
.nav-links a[aria-current="page"],
.nav-links a:hover { color: #7ec8ee; }
.nav-toggle {
  display: none;
  background: transparent;
  color: #fff;
  border: 1px solid #3a3a3a;
  width: 44px;
  height: 44px;
  border-radius: 4px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  padding: 0 18px;
  border-radius: 2px;
  text-decoration: none;
  font-family: var(--cond);
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border: 1px solid transparent;
  cursor: pointer;
}
.btn-primary { background: var(--blue); color: #fff; }
.btn-primary:hover { background: #0b86cc; }
.btn-ghost { background: transparent; color: #fff; border-color: rgba(255,255,255,0.4); }
.btn-ghost:hover { border-color: #fff; }
.btn-line { background: #fff; color: var(--blue-deep); border-color: var(--line); }
.btn-line:hover { border-color: var(--blue); }

.hero {
  background:
    linear-gradient(180deg, rgba(1, 42, 65, 0.55), rgba(12, 12, 12, 0.82)),
    repeating-linear-gradient(0deg, transparent, transparent 27px, rgba(255,255,255,0.05) 28px),
    repeating-linear-gradient(90deg, transparent, transparent 27px, rgba(255,255,255,0.05) 28px),
    var(--blue-deep);
  color: #fff;
  padding: 64px 0 56px;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.35fr 0.85fr;
  gap: 40px;
  align-items: end;
}
.kicker {
  font-family: var(--cond);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-size: 13px;
  color: #8ecff0;
  margin-bottom: 14px;
}
.hero h1 { font-size: clamp(40px, 5vw, 64px); max-width: 14ch; }
.hero p.lead { font-size: 20px; max-width: 42rem; color: #e6eef3; margin: 18px 0 0; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.hero-note { margin-top: 18px; color: #b7c6d0; font-size: 14px; }

.spec-card {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.16);
  padding: 22px;
  backdrop-filter: blur(6px);
}
.spec-card h2 {
  font-size: 22px;
  margin-bottom: 14px;
}
.spec-card dl { margin: 0; }
.spec-card div {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 10px;
  padding: 10px 0;
  border-top: 1px solid rgba(255,255,255,0.12);
}
.spec-card dt { color: #9fb4c2; font-size: 14px; }
.spec-card dd { margin: 0; }

.subnav {
  position: sticky;
  top: 78px;
  z-index: 25;
  background: #fff;
  border-bottom: 1px solid var(--line);
}
.subnav-inner {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  padding: 0;
}
.subnav a {
  color: var(--ink);
  text-decoration: none;
  font-family: var(--cond);
  font-size: 15px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 14px 12px;
  white-space: nowrap;
  border-bottom: 2px solid transparent;
}
.subnav a:hover { color: var(--blue); border-bottom-color: var(--blue); }

.section, .hero { scroll-margin-top: 140px; }
.section { padding: 72px 0; }
.section.alt { background: var(--paper); }
.section-head {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 12px;
  margin-bottom: 28px;
  align-items: end;
}
.section-no {
  font-family: var(--cond);
  font-size: 28px;
  color: var(--blue);
}
.section h2 { font-size: clamp(32px, 4vw, 44px); max-width: 22ch; }
.section .intro { max-width: 46rem; color: var(--muted); margin: 0 0 28px; }

.cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}
.card, .point, .app {
  background: #fff;
  border: 1px solid var(--line);
  padding: 18px 18px 16px;
}
.section.alt .card, .section.alt .point, .section.alt .app { background: #fff; }
.card h3, .point h3, .app h3 {
  font-size: 22px;
  margin-bottom: 8px;
}
.card p, .point p, .app p { margin: 0; color: var(--muted); font-size: 16px; }
.points, .apps { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }

.table-wrap { overflow-x: auto; border: 1px solid var(--line); background: #fff; }
table { width: 100%; border-collapse: collapse; min-width: 640px; }
th, td { text-align: left; padding: 14px 16px; vertical-align: top; border-bottom: 1px solid var(--line); }
th { font-family: var(--cond); font-size: 16px; letter-spacing: 0.04em; text-transform: uppercase; background: var(--ink); color: #fff; }
td:first-child { font-weight: 600; width: 22%; }
caption {
  caption-side: bottom;
  text-align: left;
  color: var(--muted);
  font-size: 14px;
  padding: 12px 16px 14px;
}

.callout {
  margin-top: 18px;
  border-left: 4px solid var(--blue);
  background: var(--blue-soft);
  padding: 16px 18px;
}
.callout strong { font-family: var(--cond); font-size: 18px; letter-spacing: 0.03em; }
.callout p { margin: 6px 0 0; }

.limit {
  margin-top: 18px;
  background: #fff8f6;
  border: 1px solid #f0d2cc;
  padding: 16px 18px;
}
.limit h3 { font-size: 22px; color: var(--red); margin-bottom: 8px; }
.limit ul { margin: 0; padding-left: 18px; }
.limit li { margin: 6px 0; }

.why-band {
  background: var(--ink);
  color: #e8eef2;
}
.why-band .section-no { color: #8ecff0; }
.why-band h2 { color: #fff; }
.why-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 28px; }
.stat-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.stat {
  border: 1px solid #343434;
  padding: 16px;
}
.stat b {
  display: block;
  font-family: var(--cond);
  font-size: 28px;
  color: #fff;
}
.stat span { color: #b7c3cb; font-size: 15px; }

.faq details {
  border-bottom: 1px solid var(--line);
  background: #fff;
}
.faq summary {
  cursor: pointer;
  padding: 16px 8px;
  font-family: var(--cond);
  font-size: 22px;
  list-style: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary:focus-visible { outline: 2px solid var(--blue); outline-offset: 2px; }
.faq details p { margin: 0; padding: 0 8px 16px; color: var(--muted); max-width: 48rem; }

.enquiry {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 28px;
  align-items: start;
}
form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  background: #fff;
  border: 1px solid var(--line);
  padding: 18px;
}
label { display: grid; gap: 6px; font-size: 14px; font-weight: 600; }
label.wide { grid-column: 1 / -1; }
input, select, textarea {
  width: 100%;
  border: 1px solid #cfd6dc;
  border-radius: 2px;
  padding: 10px 12px;
  background: #fff;
  color: var(--text);
}
textarea { min-height: 120px; resize: vertical; }
input:focus, select:focus, textarea:focus { outline: 2px solid var(--blue); border-color: var(--blue); }
.form-error { color: var(--red); font-size: 14px; grid-column: 1 / -1; display: none; }
.form-success { display: none; grid-column: 1 / -1; background: var(--blue-soft); padding: 12px; }
form .btn { grid-column: 1 / -1; justify-self: start; }

.site-footer {
  background: var(--header);
  color: #c9cdd1;
  padding: 36px 0 28px;
  font-size: 15px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 24px;
}
.site-footer a { color: #fff; text-decoration: none; }
.site-footer a:hover { color: #8ecff0; }
.site-footer h2 { color: #fff; font-size: 18px; margin-bottom: 10px; letter-spacing: 0.08em; text-transform: uppercase; }
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer li { margin: 6px 0; }
.legal { margin-top: 22px; color: #8d979e; font-size: 13px; }

.hub-hero { padding-bottom: 28px; }
.hub-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.hub-card {
  display: block;
  text-decoration: none;
  color: inherit;
  background: #fff;
  border: 1px solid var(--line);
  padding: 22px;
  min-height: 220px;
  box-shadow: var(--shadow);
}
.hub-card:hover { border-color: var(--blue); }
.hub-card span {
  font-family: var(--cond);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--blue);
  font-size: 13px;
}
.hub-card h2 { font-size: 34px; margin: 10px 0; color: var(--ink); }
.hub-card p { margin: 0; color: var(--muted); }
.later { margin-top: 22px; color: var(--muted); }

.section-head.no-num { grid-template-columns: 1fr; }

.article-hero {
  background: var(--blue-deep);
  color: #fff;
  padding: 44px 0 40px;
}
.article-hero h1 { font-size: clamp(34px, 4.4vw, 54px); max-width: 24ch; }
.article-hero .lead { font-size: 20px; max-width: 46rem; color: #e6eef3; margin: 16px 0 0; }
.crumbs { font-size: 14px; color: #9fb4c2; margin-bottom: 18px; }
.crumbs a { color: #cfe6f3; }
.byline { margin: 18px 0 0; color: #b7c6d0; font-size: 15px; }

.article-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 290px;
  gap: 56px;
  padding: 56px 0 24px;
  align-items: start;
}
.prose { max-width: 46rem; min-width: 0; }
.prose > :first-child { margin-top: 0; }
.prose h2 {
  font-size: clamp(28px, 3vw, 36px);
  margin: 48px 0 14px;
  scroll-margin-top: 100px;
}
.prose h3 { font-size: 23px; margin: 28px 0 8px; }
.prose p, .prose li { color: #2a333a; }
.prose p { margin: 0 0 16px; }
.prose ul, .prose ol { margin: 0 0 18px; padding-left: 22px; }
.prose li { margin: 6px 0; }
.prose .table-wrap { margin: 18px 0 22px; }
.prose table { min-width: 560px; font-size: 16px; }
.prose th, .prose td { padding: 11px 13px; }
.prose .callout, .prose .limit { margin: 20px 0 24px; }
.prose blockquote {
  margin: 18px 0 22px;
  padding: 16px 18px;
  background: var(--paper);
  border: 1px solid var(--line);
  font-size: 16px;
}
.prose blockquote p:last-child { margin-bottom: 0; }
.keybox {
  border: 1px solid var(--line);
  border-top: 4px solid var(--blue);
  background: #fff;
  box-shadow: var(--shadow);
  padding: 18px 20px 6px;
  margin-bottom: 8px;
}
.keybox strong { font-family: var(--cond); font-size: 20px; letter-spacing: 0.03em; }
.keybox ul { margin-top: 10px; }

.article-aside { position: sticky; top: 100px; display: grid; gap: 16px; }
.toc { border: 1px solid var(--line); padding: 16px 18px; background: #fff; }
.toc h2, .aside-cta h2 {
  font-size: 15px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 10px;
}
.toc ol { margin: 0; padding-left: 18px; font-size: 15px; }
.toc li { margin: 7px 0; }
.toc a { color: var(--text); text-decoration: none; }
.toc a:hover { color: var(--blue); }
.aside-cta { background: var(--ink); color: #e8eef2; padding: 18px; }
.aside-cta h2 { color: #8ecff0; }
.aside-cta p { font-size: 15px; margin: 0 0 14px; color: #c8d2d8; }
.aside-cta .btn { width: 100%; font-size: 15px; text-align: center; }
.aside-link { display: block; margin-top: 10px; color: #fff; font-size: 14px; }

.post-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.post-card { display: flex; flex-direction: column; min-height: 0; }
.post-card h2, .post-card h3 { font-size: 26px; margin: 10px 0; color: var(--ink); line-height: 1.1; }
.post-card p { font-size: 16px; }
.post-card .post-meta { margin-top: auto; padding-top: 14px; font-size: 14px; color: var(--muted); }

.post-strip { background: var(--blue-soft); padding: 22px 0; }
.post-strip .wrap { display: grid; gap: 10px; }
.post-link {
  display: block;
  text-decoration: none;
  color: var(--ink);
  background: #fff;
  border: 1px solid #cfe3ef;
  padding: 14px 18px;
}
.post-link:hover { border-color: var(--blue); }
.post-link span {
  display: block;
  font-family: var(--cond);
  font-size: 13px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--blue);
}
.post-link strong { font-family: var(--cond); font-size: 22px; }

@media (max-width: 1180px) {
  .nav-toggle { display: inline-flex; align-items: center; justify-content: center; }
  .nav-links {
    display: none;
    position: absolute;
    top: 78px;
    left: 0;
    right: 0;
    background: #0c0c0c;
    flex-direction: column;
    align-items: stretch;
    padding: 8px 16px 16px;
  }
  .nav-links.open { display: flex; }
}

@media (max-width: 900px) {
  .hero-grid, .why-grid, .enquiry, .cards, .hub-grid, .footer-grid { grid-template-columns: 1fr; }
  .points, .apps, .stat-row { grid-template-columns: 1fr; }
  .article-grid { grid-template-columns: 1fr; gap: 28px; padding-top: 36px; }
  .article-aside { position: static; }
  .toc { display: none; }
  .post-grid { grid-template-columns: 1fr; }
  .nav-toggle { display: inline-flex; align-items: center; justify-content: center; }
  .nav-links {
    display: none;
    position: absolute;
    top: 78px;
    left: 0;
    right: 0;
    background: #0c0c0c;
    flex-direction: column;
    align-items: stretch;
    padding: 8px 16px 16px;
  }
  .nav-links.open { display: flex; }
  .site-header { position: sticky; }
  .subnav { top: 78px; }
  form { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .topbar-inner { flex-direction: column; }
  .section { padding: 48px 0; }
  .section-head { grid-template-columns: 1fr; }
  .hero { padding: 40px 0 36px; }
  .spec-card div { grid-template-columns: 1fr; gap: 2px; }
}