:root {
  color-scheme: dark;
  --bg: #020817;
  --bg-2: #05111f;
  --panel: rgba(5, 17, 31, 0.72);
  --panel-strong: rgba(8, 27, 49, 0.86);
  --text: #f4f8ff;
  --muted: #b7c5d6;
  --muted-2: #7d8da4;
  --line: rgba(91, 177, 255, 0.18);
  --line-strong: rgba(107, 212, 255, 0.34);
  --blue: #159bff;
  --blue-2: #0b5ed7;
  --cyan: #6bd4ff;
  --shadow: 0 24px 80px rgba(0, 0, 0, .45);
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 78% 6%, rgba(255, 255, 255, .42), transparent 25rem),
    radial-gradient(circle at 18% 12%, rgba(183, 246, 255, .46), transparent 26rem),
    linear-gradient(180deg, #d8fbff 0%, #8edff1 17%, #2194c2 34%, #07527d 53%, #021b33 73%, #00040a 100%);
  min-height: 100vh;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }

.skip-link {
  position: absolute;
  left: -999px;
  top: 10px;
  padding: 10px 12px;
  background: var(--blue);
  color: white;
  border-radius: 8px;
  z-index: 999;
}
.skip-link:focus { left: 10px; }

.page-shell {
  position: relative;
  isolation: isolate;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: calc(var(--max) + 80px);
  margin: 0 auto;
  padding: 14px 40px;
  background: rgba(255, 255, 255, .58);
  border-bottom: 1px solid rgba(5, 17, 31, .08);
  box-shadow: 0 14px 38px rgba(0, 0, 0, .1);
  backdrop-filter: blur(18px) saturate(1.18);
  -webkit-backdrop-filter: blur(18px) saturate(1.18);
}

.depth-ruler {
  position: absolute;
  top: 0;
  right: max(16px, calc((100vw - var(--max)) / 2 - 72px));
  bottom: 0;
  z-index: 4;
  width: 74px;
  pointer-events: none;
}
.depth-ruler::before {
  content: "";
  position: absolute;
  top: 12px;
  bottom: 12px;
  right: 10px;
  width: 1px;
  background: linear-gradient(180deg, rgba(6, 16, 31, .32), rgba(107, 212, 255, .38), rgba(255, 255, 255, .16));
}
.depth-mark {
  position: absolute;
  right: 0;
  display: flex;
  align-items: center;
  gap: 8px;
  color: rgba(244, 248, 255, .5);
  font-size: 11px;
  font-weight: 800;
  line-height: 1;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  transform: translateY(-50%);
}
.depth-mark::after {
  content: "";
  width: 14px;
  height: 1px;
  order: 2;
  background: currentColor;
}
.depth-0 {
  top: 28px;
  color: rgba(6, 16, 31, .58);
}
.depth-200 {
  top: 28%;
  color: rgba(6, 16, 31, .48);
}
.depth-1000 { top: 38%; }
.depth-2000 { top: 49%; }
.depth-3000 { top: 60%; }
.depth-5000 { top: 72%; }
.depth-7000 { top: 84%; }
.depth-10000 {
  top: calc(100% - 38px);
  color: rgba(244, 248, 255, .62);
}

.brand {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 230px;
  padding: 0;
  background: transparent;
}
.brand img {
  width: 210px;
  height: auto;
  object-fit: contain;
  object-position: center;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: clamp(16px, 3vw, 34px);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: clamp(14px, 3vw, 34px);
  color: rgba(6, 16, 31, .82);
  font-size: 15px;
  font-weight: 700;
}
.main-nav a {
  position: relative;
  padding: 9px 2px;
}
.main-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 4px;
  height: 1px;
  background: var(--blue);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .2s ease;
}
.main-nav a:hover::after,
.main-nav a:focus-visible::after { transform: scaleX(1); }

.language-switch {
  display: inline-flex;
  align-items: center;
  padding: 3px;
  border: 1px solid rgba(6, 16, 31, .16);
  border-radius: 999px;
  background: rgba(2, 8, 23, .05);
}
.language-switch button {
  appearance: none;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: rgba(6, 16, 31, .72);
  cursor: pointer;
  font: inherit;
  font-size: 13px;
  font-weight: 800;
  line-height: 1;
  padding: 9px 12px;
}
.language-switch button.is-active {
  background: #06101f;
  color: #fff;
}

.hero {
  position: relative;
  min-height: 640px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  align-items: center;
  gap: 32px;
  max-width: calc(var(--max) + 80px);
  margin: 0 auto;
  padding: 82px 40px 100px;
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}
.hero::before {
  display: none;
}
.hero::after {
  display: none;
}
.hero-copy {
  position: relative;
  z-index: 2;
  max-width: 760px;
}
.eyebrow {
  margin: 0 0 16px;
  color: var(--cyan);
  font-size: 12px;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: .16em;
  text-transform: uppercase;
}
.hero .eyebrow {
  color: #075e87;
}
.hero h1 {
  margin: 0;
  max-width: 620px;
  color: #06101f;
  font-size: clamp(54px, 8vw, 100px);
  line-height: .94;
  letter-spacing: 0;
  text-shadow: 0 10px 30px rgba(255,255,255,.38);
}
.hero-subtitle {
  margin: 26px 0 0;
  max-width: 510px;
  color: #17324a;
  font-size: clamp(19px, 2vw, 24px);
  line-height: 1.45;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin-top: 34px;
}
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  min-width: 168px;
  padding: 15px 22px;
  border-radius: 7px;
  font-weight: 800;
  box-shadow: var(--shadow);
  transition: transform .18s ease, border-color .18s ease, background .18s ease;
}
.button:hover { transform: translateY(-2px); }
.button-primary {
  background: linear-gradient(135deg, var(--blue), var(--blue-2));
  border: 1px solid rgba(107, 212, 255, .4);
  color: #fff;
}
.button-secondary {
  background: rgba(255,255,255,.035);
  border: 1px solid rgba(244, 248, 255, .46);
  color: #fff;
}

.systems-section,
.achievements-section {
  max-width: calc(var(--max) + 80px);
  margin: 0 auto;
  padding: 64px 40px 70px;
  border-bottom: 1px solid var(--line);
}
.section-heading.centered { text-align: center; }
.section-heading h2,
.split-kicker h2,
.contact-card h2 {
  margin: 0;
  color: #fff;
  font-size: clamp(30px, 3.8vw, 48px);
  line-height: 1.08;
  letter-spacing: 0;
}
.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 34px;
}
.card {
  min-height: 160px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: linear-gradient(180deg, rgba(8, 27, 49, .66), rgba(3, 12, 22, .54));
  box-shadow: 0 18px 60px rgba(0,0,0,.22);
}
.card:hover { border-color: var(--line-strong); }
.card h3 {
  margin: 0 0 10px;
  font-size: 23px;
  line-height: 1.15;
  letter-spacing: 0;
}
.card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.55;
}

.achievement-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 34px;
}
.achievement {
  display: block;
  min-height: 148px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: linear-gradient(180deg, rgba(8, 27, 49, .76), rgba(3, 12, 22, .58));
  box-shadow: 0 18px 60px rgba(0,0,0,.22);
  transition: border-color .2s ease, transform .2s ease, background .2s ease;
}
.achievement:hover,
.achievement:focus-visible {
  border-color: var(--line-strong);
  background: linear-gradient(180deg, rgba(8, 37, 66, .82), rgba(3, 15, 28, .64));
  transform: translateY(-2px);
}
.achievement:focus-visible {
  outline: 2px solid rgba(107, 212, 255, .7);
  outline-offset: 4px;
}
.achievement span {
  display: inline-flex;
  align-items: center;
  margin-bottom: 18px;
  color: var(--cyan);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: .16em;
}
.achievement h3 {
  margin: 0;
  font-size: clamp(23px, 3vw, 34px);
  line-height: 1.14;
  letter-spacing: 0;
}

.split-section {
  position: relative;
  display: grid;
  grid-template-columns: minmax(280px, .86fr) minmax(320px, 1.14fr);
  gap: clamp(36px, 7vw, 84px);
  max-width: calc(var(--max) + 80px);
  margin: 0 auto;
  padding: 62px 40px;
  border-bottom: 1px solid var(--line);
}
.split-section::before {
  content: "";
  position: absolute;
  top: 60px;
  bottom: 60px;
  left: calc(40% + 8px);
  width: 1px;
  background: var(--line);
}
.why-section { overflow: hidden; }
.why-section::after {
  display: none;
}
.split-kicker,
.split-copy { position: relative; z-index: 1; }
.split-copy {
  color: var(--muted);
  font-size: 18px;
  line-height: 1.68;
}
.split-copy p { margin: 0 0 20px; }
.split-copy p:last-child { margin-bottom: 0; }
.focus-copy {
  max-width: 760px;
}
.focus-section {
  max-width: calc(var(--max) + 80px);
  margin: 0 auto;
  padding: 62px 40px 42px;
  border-bottom: 1px solid rgba(91, 177, 255, .08);
}
.seabed-strata {
  position: relative;
  overflow: hidden;
  max-width: calc(var(--max) + 80px);
  height: 230px;
  margin: 0 auto;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(circle at 78% 0%, rgba(107, 212, 255, .14), transparent 18rem),
    linear-gradient(180deg, rgba(0, 20, 40, .48), rgba(0, 0, 0, .86));
}
.seabed-strata::before {
  content: "";
  position: absolute;
  left: -6%;
  right: -6%;
  bottom: -7%;
  height: 88%;
  background:
    linear-gradient(168deg, transparent 0 18%, rgba(76, 157, 178, .28) 18% 29%, transparent 29% 100%),
    linear-gradient(174deg, transparent 0 29%, rgba(38, 95, 117, .42) 29% 42%, transparent 42% 100%),
    linear-gradient(166deg, transparent 0 44%, rgba(116, 101, 78, .5) 44% 58%, transparent 58% 100%),
    linear-gradient(172deg, transparent 0 58%, rgba(58, 48, 41, .72) 58% 74%, rgba(8, 7, 7, .96) 74% 100%);
  clip-path: polygon(0 22%, 12% 14%, 29% 28%, 45% 18%, 62% 32%, 78% 20%, 100% 30%, 100% 100%, 0 100%);
  pointer-events: none;
}
.seabed-strata::after {
  content: "";
  position: absolute;
  left: -10%;
  right: -10%;
  bottom: 0;
  height: 86%;
  opacity: .5;
  background-image:
    repeating-linear-gradient(168deg, rgba(255,255,255,.09) 0 1px, transparent 1px 24px),
    repeating-linear-gradient(14deg, rgba(0,0,0,.18) 0 1px, transparent 1px 34px);
  pointer-events: none;
}

.contact-section {
  position: relative;
  overflow: hidden;
  max-width: calc(var(--max) + 80px);
  margin: 0 auto;
  padding: 58px 40px 82px;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(circle at 78% 4%, rgba(107, 212, 255, .18), transparent 22rem),
    linear-gradient(180deg, rgba(0, 16, 33, .72), rgba(0, 0, 0, .92));
}
.contact-section::before {
  display: none;
}
.contact-section::after {
  display: none;
}
.contact-card {
  position: relative;
  z-index: 1;
}
.contact-email {
  display: inline-block;
  margin-top: 18px;
  color: var(--blue);
  font-size: clamp(22px, 3vw, 34px);
  line-height: 1.25;
  letter-spacing: 0;
}
.contact-email:hover { color: var(--cyan); }

.social-block {
  margin-top: 34px;
}
.social-block h3 {
  margin: 0 0 14px;
  color: #fff;
  font-size: 18px;
  line-height: 1.2;
}
.social-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.social-link {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(244, 248, 255, .2);
  border-radius: 8px;
  background: rgba(255,255,255,.94);
  color: #06101f;
  transition: transform .18s ease, border-color .18s ease, background .18s ease;
}
.social-link:hover,
.social-link:focus-visible {
  transform: translateY(-2px);
  border-color: rgba(107, 212, 255, .56);
  background: #fff;
}
.social-link svg {
  width: 22px;
  height: 22px;
  fill: currentColor;
}
.social-linkedin { color: #0a66c2; }
.social-x { color: #000; }
.social-facebook { color: #1877f2; }

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  max-width: calc(var(--max) + 80px);
  margin: 0 auto;
  padding: 26px 40px 38px;
  color: var(--muted-2);
  font-size: 13px;
}
.site-footer p { margin: 0; }

@media (max-width: 980px) {
  .depth-ruler {
    right: 8px;
    width: 58px;
  }
  .depth-mark {
    font-size: 10px;
    opacity: .82;
  }
  .site-header {
    align-items: flex-start;
    gap: 18px;
    padding-inline: 24px;
  }
  .brand {
    min-width: 180px;
  }
  .brand img {
    width: 180px;
  }
  .header-actions {
    align-items: flex-end;
    flex-direction: column;
    gap: 14px;
  }
  .main-nav {
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 10px 18px;
  }
  .systems-section,
  .achievements-section,
  .focus-section,
  .seabed-strata,
  .split-section,
  .contact-section,
  .site-footer {
    padding-inline: 24px;
  }
  .cards,
  .achievement-list {
    grid-template-columns: 1fr;
  }
  .split-section {
    grid-template-columns: 1fr;
  }
  .split-section::before {
    display: none;
  }
}

@media (max-width: 680px) {
  .site-header,
  .header-actions {
    align-items: stretch;
    flex-direction: column;
  }
  .brand {
    width: max-content;
    min-width: 0;
  }
  .brand img {
    width: 172px;
  }
  .main-nav {
    justify-content: space-between;
    font-size: 13px;
  }
  .language-switch {
    width: max-content;
  }
  .hero {
    min-height: auto;
    padding: 60px 24px 70px;
  }
  .depth-ruler {
    display: none;
  }
  .hero h1 {
    font-size: clamp(50px, 17vw, 70px);
  }
  .hero-subtitle {
    font-size: 18px;
  }
  .button {
    width: 100%;
  }
  .site-footer {
    flex-direction: column;
  }
}