:root {
  --abyss-1000: #02090f;
  --abyss-950: #06131d;
  --abyss-900: #081b27;
  --abyss-800: #0b2734;
  --teal-950: #062326;
  --teal-900: #083338;
  --teal-800: #0b454a;
  --aqua-300: #79e1d7;
  --aqua-400: #55d6cc;
  --aqua-600: #2ea89d;
  --foam-50: #f7faf8;
  --foam-100: #eef3ee;
  --muted: #a9bfca;
  --muted-strong: #c5d3d9;
  --warning: #f0c36a;
  --line: rgba(174, 218, 218, 0.2);
  --line-soft: rgba(174, 218, 218, 0.1);
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.28);
  --display: 'Source Serif 4', Georgia, serif;
  --body: 'IBM Plex Sans', system-ui, sans-serif;
  --mono: 'IBM Plex Mono', ui-monospace, monospace;
  --content: 1180px;
  --measure: 68ch;
  --gutter: clamp(1.15rem, 4vw, 2.75rem);
  --section: clamp(4.5rem, 9vw, 8rem);
  --header: 78px;
}

*, *::before, *::after { box-sizing: border-box; }

html {
  color-scheme: dark;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header) + 1rem);
  background: var(--abyss-950);
}

body {
  margin: 0;
  min-width: 280px;
  color: var(--foam-100);
  background: var(--abyss-950);
  font-family: var(--body);
  font-size: clamp(1rem, 0.97rem + 0.22vw, 1.125rem);
  line-height: 1.65;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; }
button, input, textarea, select { font: inherit; }
a { color: var(--aqua-300); text-underline-offset: 0.2em; }
a:hover { color: var(--foam-50); }

:focus-visible {
  outline: 3px solid var(--aqua-400);
  outline-offset: 4px;
  border-radius: 2px;
}

::selection { color: var(--abyss-1000); background: var(--aqua-300); }

h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 {
  color: var(--foam-50);
  font-family: var(--display);
  font-weight: 400;
  line-height: 1.06;
  text-wrap: balance;
}
h1 { margin-bottom: 1.5rem; font-size: clamp(2.7rem, 5.8vw, 6rem); letter-spacing: -0.035em; }
h2 { margin-bottom: 1.25rem; font-size: clamp(2.15rem, 4vw, 4rem); letter-spacing: -0.025em; }
h3 { margin-bottom: 0.85rem; font-size: clamp(1.45rem, 2.15vw, 2rem); }
h1 em, h2 em { color: var(--aqua-300); font-weight: 400; }
p:last-child { margin-bottom: 0; }

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.75rem 1rem;
  color: var(--abyss-1000);
  background: var(--aqua-300);
  font-weight: 600;
  transform: translateY(-180%);
  transition: transform 160ms ease;
}
.skip-link:focus { transform: translateY(0); }

.inner {
  width: min(100% - (2 * var(--gutter)), var(--content));
  margin-inline: auto;
}
.narrow { max-width: 780px; }
.measured { max-width: var(--measure); }
.small { font-size: 0.92rem; }
.muted { color: var(--muted); }

.site-header {
  position: sticky;
  z-index: 100;
  top: 0;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  min-height: var(--header);
  padding: 0.65rem var(--gutter);
  border-bottom: 1px solid var(--line-soft);
  background: rgba(3, 11, 19, 0.93);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--foam-50);
  font-family: var(--display);
  font-size: 1.4rem;
  line-height: 1;
  text-decoration: none;
}
.brand img { width: 52px; height: 52px; }
.brand small {
  display: block;
  margin-top: 0.35rem;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.62rem;
  font-weight: 500;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.desktop-nav {
  display: flex;
  justify-content: center;
  gap: clamp(0.85rem, 2.1vw, 2rem);
  padding-inline: 1rem;
}
.desktop-nav a {
  position: relative;
  color: var(--muted-strong);
  font-size: 0.83rem;
  font-weight: 500;
  letter-spacing: 0.055em;
  text-decoration: none;
  text-transform: uppercase;
}
.desktop-nav a::after {
  position: absolute;
  right: 0;
  bottom: -0.45rem;
  left: 0;
  height: 1px;
  background: var(--aqua-400);
  content: '';
  transform: scaleX(0);
  transition: transform 180ms ease;
}
.desktop-nav a:hover::after,
.desktop-nav a[aria-current='page']::after { transform: scaleX(1); }
.desktop-nav a[aria-current='page'] { color: var(--foam-50); }

.nav-drawer { display: none; }
.nav-drawer summary {
  min-width: 64px;
  min-height: 44px;
  padding: 0.55rem 0.75rem;
  border: 1px solid var(--line);
  border-radius: 3px;
  color: var(--foam-50);
  cursor: pointer;
  list-style: none;
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.nav-drawer summary::-webkit-details-marker { display: none; }
.nav-drawer summary::before { content: '☰'; margin-right: 0.45rem; color: var(--aqua-300); }
.nav-drawer[open] summary::before { content: '×'; }
.nav-drawer nav {
  position: absolute;
  top: calc(100% + 1px);
  right: var(--gutter);
  display: grid;
  min-width: min(310px, calc(100vw - (2 * var(--gutter))));
  border: 1px solid var(--line);
  background: var(--abyss-900);
  box-shadow: var(--shadow);
}
.nav-drawer nav a {
  min-height: 48px;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--line-soft);
  color: var(--foam-100);
  text-decoration: none;
}
.nav-drawer nav a:last-child { border-bottom: 0; color: var(--aqua-300); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0.7rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: 3px;
  color: var(--foam-50);
  background: transparent;
  font-family: var(--mono);
  font-size: 0.77rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  line-height: 1.25;
  text-align: center;
  text-decoration: none;
  text-transform: uppercase;
  transition: color 160ms ease, background 160ms ease, border-color 160ms ease, transform 160ms ease;
}
.btn:hover { color: var(--abyss-1000); border-color: var(--aqua-300); background: var(--aqua-300); transform: translateY(-2px); }
.btn-primary { color: var(--abyss-1000); border-color: var(--aqua-300); background: var(--aqua-300); }
.btn-primary:hover { color: var(--abyss-1000); background: var(--foam-50); border-color: var(--foam-50); }
.btn-ghost { background: rgba(3, 11, 19, 0.45); }
.header-contact { min-height: 42px; }

.breadcrumb {
  padding-block: 0.9rem;
  font-family: var(--mono);
  font-size: 0.73rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.breadcrumb ol { display: flex; flex-wrap: wrap; gap: 0.5rem; margin: 0; padding: 0; list-style: none; }
.breadcrumb li + li::before { margin-right: 0.5rem; color: var(--muted); content: '/'; }
.breadcrumb a { color: var(--aqua-300); }
.breadcrumb li[aria-current='page'] { color: var(--muted); }

.hero {
  position: relative;
  isolation: isolate;
  display: flex;
  min-height: min(780px, calc(100svh - var(--header)));
  overflow: hidden;
  align-items: end;
  border-bottom: 1px solid var(--line-soft);
  background: var(--abyss-1000);
}
.hero-media { position: absolute; z-index: -3; inset: 0; }
.hero-media img { width: 100%; height: 100%; object-fit: cover; object-position: center; transform: scale(1.015); }
.hero::before {
  position: absolute;
  z-index: -2;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(2, 9, 15, 0.93) 0%, rgba(2, 9, 15, 0.74) 45%, rgba(2, 9, 15, 0.28) 78%),
    linear-gradient(0deg, rgba(2, 9, 15, 0.92) 0%, transparent 55%);
  content: '';
}
.hero::after {
  position: absolute;
  z-index: -1;
  inset: 0;
  background: radial-gradient(circle at 70% 30%, rgba(85, 214, 204, 0.12), transparent 32%);
  content: '';
}
.hero-content { padding-block: clamp(5rem, 12vh, 9rem); }
.hero h1 { max-width: 950px; }
.hero-lede { max-width: 760px; margin-bottom: 2rem; color: var(--muted-strong); font-size: clamp(1.15rem, 1.7vw, 1.4rem); line-height: 1.55; }
.hero-org { margin-bottom: 1rem; color: var(--muted); font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.12em; text-transform: uppercase; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 0.75rem; }
.hero-depth {
  position: absolute;
  right: clamp(1rem, 3vw, 3rem);
  bottom: 12%;
  display: grid;
  gap: 1.5rem;
  width: 40px;
}
.hero-depth::before { position: absolute; top: -100vh; bottom: -100vh; left: 50%; width: 1px; background: var(--line); content: ''; }
.hero-depth span { z-index: 1; width: 8px; height: 8px; margin-inline: auto; border: 1px solid var(--aqua-300); border-radius: 50%; background: var(--abyss-900); }

.eyebrow,
.marker,
.panel-number {
  margin-bottom: 0.9rem;
  color: var(--aqua-300);
  font-family: var(--mono);
  font-size: 0.74rem;
  font-weight: 500;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.band { padding-block: var(--section); scroll-margin-top: calc(var(--header) + 1rem); }
.band-alt { background: var(--abyss-900); }
.band-teal { background: var(--teal-950); }
.safety-band { background: linear-gradient(145deg, var(--abyss-950), var(--teal-950)); }
.summary-band { background: var(--abyss-950); }
.lede { color: var(--muted-strong); font-size: clamp(1.1rem, 1.6vw, 1.35rem); line-height: 1.6; }

.legacy-intro { padding-block: clamp(2.6rem, 5vw, 4.2rem); background: var(--teal-950); }
.legacy-note { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: clamp(1rem, 3vw, 2rem); align-items: start; max-width: 920px; }
.legacy-note h2 { font-size: clamp(1.8rem, 3vw, 2.8rem); }
.legacy-note p:not(.eyebrow) { max-width: 720px; color: var(--muted-strong); }
.legacy-mark { display: grid; width: clamp(56px, 8vw, 84px); aspect-ratio: 1; place-items: center; border: 1px solid var(--aqua-400); border-radius: 50%; color: var(--aqua-300); font-family: var(--display); font-size: 2.2rem; }

.route-grid,
.panel-grid,
.step-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 2.5rem;
}
.route-card,
.panel,
.step,
.signal-card {
  position: relative;
  padding: clamp(1.35rem, 2.7vw, 2rem);
  border: 1px solid var(--line);
  background: rgba(6, 19, 29, 0.7);
}
.route-card { display: flex; flex-direction: column; min-height: 390px; overflow: hidden; }
.route-card::after { position: absolute; right: -2rem; bottom: -2rem; width: 8rem; height: 8rem; border: 1px solid var(--line-soft); border-radius: 50%; content: ''; }
.route-card .fit { min-height: 3.3em; color: var(--foam-50); font-weight: 500; }
.route-card p:not(.marker):not(.fit) { color: var(--muted); }
.route-card .card-link { z-index: 1; margin-top: auto; padding-top: 1.5rem; font-family: var(--mono); font-size: 0.78rem; font-weight: 500; letter-spacing: 0.05em; text-decoration: none; text-transform: uppercase; }
.route-card:hover { border-color: rgba(85, 214, 204, 0.58); background: rgba(8, 51, 56, 0.45); }

.panel p, .step p { color: var(--muted); }
.panel-warning { border-color: rgba(240, 195, 106, 0.46); }
.panel-warning .panel-number, .panel-warning h3 { color: var(--warning); }
.panel-grid .panel-number { padding-bottom: 0.8rem; border-bottom: 1px solid var(--line-soft); }

.team-grid {
  display: grid;
  grid-template-columns: 1.3fr 0.85fr 0.85fr;
  gap: 1rem;
  margin-top: clamp(3.5rem, 7vw, 6.5rem);
  padding-top: clamp(3rem, 5vw, 5rem);
  border-top: 1px solid var(--line);
  align-items: stretch;
}
.team-copy { padding-right: clamp(0rem, 3vw, 2rem); align-self: center; }
.team-copy h3 { font-size: clamp(2rem, 3.3vw, 3.2rem); }
.person-card { margin: 0; border: 1px solid var(--line); background: var(--abyss-900); }
.person-card img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; object-position: center top; filter: saturate(0.86) contrast(1.05); }
.person-card figcaption { display: grid; gap: 0.2rem; padding: 1rem 1.1rem; }
.person-card figcaption strong { font-family: var(--display); font-size: 1.35rem; font-weight: 400; }
.person-card figcaption span { color: var(--muted); font-family: var(--mono); font-size: 0.69rem; letter-spacing: 0.07em; text-transform: uppercase; }

.two-column,
.summary-grid,
.contact-grid,
.faq-layout {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(1.4rem, 5vw, 5rem);
  align-items: start;
}
.two-column { gap: 1rem; margin-top: 2rem; }

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  min-height: 44px;
  color: var(--aqua-300);
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-decoration: none;
  text-transform: uppercase;
}
.text-link:hover { color: var(--foam-50); }

.faq-list { border-top: 1px solid var(--line); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary {
  position: relative;
  min-height: 64px;
  padding: 1.15rem 3rem 1.15rem 0;
  color: var(--foam-50);
  cursor: pointer;
  list-style: none;
  font-weight: 500;
  line-height: 1.45;
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { position: absolute; top: 1rem; right: 0; color: var(--aqua-300); font-family: var(--display); font-size: 1.7rem; content: '+'; }
.faq-list details[open] summary::after { content: '−'; }
.faq-answer { max-width: var(--measure); padding: 0 2rem 1.3rem 0; color: var(--muted); }

.summary-grid { align-items: center; }
.fact-list { margin: 0; border-top: 1px solid var(--line); }
.fact-list div { display: grid; grid-template-columns: 0.8fr 1.2fr; gap: 1rem; padding-block: 0.9rem; border-bottom: 1px solid var(--line-soft); }
.fact-list dt { color: var(--muted); font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.07em; text-transform: uppercase; }
.fact-list dd { margin: 0; color: var(--foam-50); }

.step { padding-top: 4.2rem; }
.step > span { position: absolute; top: 1.2rem; right: 1.2rem; color: var(--aqua-300); font-family: var(--mono); font-size: 0.78rem; }
.step > span::before { position: absolute; top: 0.7em; right: calc(100% + 0.6rem); width: 2rem; height: 1px; background: var(--aqua-600); content: ''; }

.check-list { display: grid; gap: 0.7rem; margin: 1.2rem 0 0; padding: 0; list-style: none; }
.check-list li { position: relative; padding-left: 1.55rem; color: var(--muted-strong); }
.check-list li::before { position: absolute; top: 0.63em; left: 0; width: 0.48rem; height: 0.48rem; border: 1px solid var(--aqua-400); border-radius: 50%; content: ''; }
.panel-warning .check-list li::before { border-color: var(--warning); }

.safety-note { max-width: 840px; margin: 2rem 0 0; padding: 1rem 1.2rem; border-left: 3px solid var(--aqua-400); color: var(--muted-strong); background: rgba(85, 214, 204, 0.06); }
.signal-card { border-color: rgba(240, 195, 106, 0.46); }
.signal-card span { color: var(--warning); font-family: var(--mono); font-size: 0.76rem; letter-spacing: 0.08em; text-transform: uppercase; }
.signal-card p { margin-top: 1rem; color: var(--muted-strong); }

.contact-band { background: var(--teal-900); }
.contact-grid { align-items: center; }
.contact-actions { display: flex; flex-wrap: wrap; gap: 0.75rem; justify-content: flex-end; align-items: center; }

.site-footer { border-top: 1px solid var(--line); background: var(--abyss-1000); }
.footer-grid { display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: clamp(1.5rem, 4vw, 4rem); padding-block: clamp(3.5rem, 7vw, 6rem); }
.site-footer h2 { margin-bottom: 1rem; color: var(--aqua-300); font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase; }
.site-footer p { color: var(--muted); font-size: 0.92rem; }
.site-footer a { color: var(--foam-100); }
.footer-brand { display: flex; flex-wrap: wrap; gap: 0.9rem; align-content: start; align-items: center; }
.footer-brand p { display: grid; margin: 0; }
.footer-brand strong { color: var(--foam-50); font-family: var(--display); font-size: 1.3rem; font-weight: 400; }
.footer-brand > .small { flex-basis: 100%; }
.footer-bottom { display: flex; justify-content: space-between; gap: 1rem; padding: 1rem var(--gutter); border-top: 1px solid var(--line-soft); color: var(--muted); font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.05em; text-transform: uppercase; }

.not-found { position: relative; display: grid; min-height: 70vh; place-items: center; overflow: hidden; padding-block: var(--section); background: radial-gradient(circle at 70% 30%, var(--teal-900), var(--abyss-950) 55%); }
.not-found-water { position: absolute; right: -0.04em; bottom: -0.34em; color: rgba(85, 214, 204, 0.05); font-family: var(--display); font-size: min(55vw, 48rem); line-height: 1; }
.not-found .inner { position: relative; }
.not-found h1 { max-width: 760px; }

@media (max-width: 1040px) {
  .desktop-nav { display: none; }
  .site-header { grid-template-columns: 1fr auto auto; gap: 0.6rem; }
  .nav-drawer { display: block; }
  .route-grid, .panel-grid, .step-grid { grid-template-columns: 1fr 1fr; }
  .route-grid > :last-child, .panel-grid > :last-child, .step-grid > :last-child { grid-column: 1 / -1; }
  .route-card { min-height: 330px; }
  .team-grid { grid-template-columns: 1fr 1fr; }
  .team-copy { grid-column: 1 / -1; max-width: 760px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 720px) {
  :root { --header: 70px; }
  .site-header { padding-block: 0.45rem; }
  .brand img { width: 46px; height: 46px; }
  .brand { font-size: 1.25rem; }
  .brand small { display: none; }
  .header-contact { display: none; }
  .site-header { grid-template-columns: 1fr auto; }
  .hero { min-height: 650px; }
  .hero::before { background: linear-gradient(90deg, rgba(2, 9, 15, 0.88), rgba(2, 9, 15, 0.52)), linear-gradient(0deg, rgba(2, 9, 15, 0.96), transparent 75%); }
  .hero-depth { display: none; }
  .hero-content { padding-block: 5rem 4.5rem; }
  .hero-actions .btn { flex: 1 1 100%; }
  .route-grid, .panel-grid, .step-grid, .team-grid, .two-column, .summary-grid, .contact-grid, .faq-layout { grid-template-columns: 1fr; }
  .route-grid > :last-child, .panel-grid > :last-child, .step-grid > :last-child { grid-column: auto; }
  .route-card { min-height: 0; }
  .route-card .fit { min-height: 0; }
  .person-card { max-width: 520px; }
  .contact-actions { justify-content: flex-start; }
  .contact-actions .btn { flex: 1 1 100%; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; }
}

@media (max-width: 390px) {
  .nav-drawer summary { min-width: 44px; width: 44px; overflow: hidden; white-space: nowrap; }
  .nav-drawer summary::before { margin-right: 1rem; }
  .legacy-note { grid-template-columns: 1fr; }
  .legacy-mark { width: 56px; }
  .fact-list div { grid-template-columns: 1fr; gap: 0.25rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; }
  .hero-media img { transform: none; }
}

@media print {
  .site-header, .hero-media, .hero-depth, .hero-actions, .contact-actions, .site-footer { display: none; }
  body { color: #111; background: #fff; }
  .hero { min-height: 0; color: #111; background: #fff; }
  .hero-content, .band { padding-block: 1.5rem; }
  h1, h2, h3, .hero-lede, .lede, .panel p, .step p { color: #111; }
  .panel, .route-card, .step { break-inside: avoid; border-color: #bbb; background: transparent; }
}