:root {
  --ink: #102029;
  --muted: #5a6872;
  --paper: #f5f7f4;
  --panel: #ffffff;
  --line: #d9e0df;
  --ocean: #065d74;
  --ocean-dark: #06394c;
  --signal: #e26f36;
  --mint: #8fc7bc;
  --sky: #dcebef;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.55;
}

img {
  max-width: 100%;
  height: auto;
}

a {
  color: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px clamp(18px, 4vw, 56px);
  background: rgba(245, 247, 244, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
  gap: 10px;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  color: #fff;
  background: var(--ocean);
  font-weight: 700;
}

.brand strong,
.brand small {
  display: block;
}

.brand small {
  color: var(--muted);
  font-size: 12px;
}

nav,
.primary-menu {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 18px;
  margin: 0;
  padding: 0;
  color: #31444d;
  font-size: 14px;
  list-style: none;
}

nav a {
  text-decoration: none;
}

.hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  min-height: 82vh;
  display: flex;
  align-items: flex-end;
  padding: 110px clamp(20px, 5vw, 72px) 70px;
  color: #fff;
  background: #061d29;
}

.hero::after {
  position: absolute;
  inset: 0;
  z-index: -1;
  content: "";
  background:
    linear-gradient(90deg, rgba(4, 19, 28, 0.88), rgba(4, 33, 48, 0.54), rgba(4, 33, 48, 0.16)),
    linear-gradient(0deg, rgba(4, 19, 28, 0.42), rgba(4, 19, 28, 0));
}

.hero-gallery {
  position: absolute;
  inset: 0;
  z-index: -2;
}

.hero-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transform: scale(1.04);
  transition: opacity 900ms ease, transform 6800ms ease;
}

.hero-slide.is-active {
  opacity: 1;
  transform: scale(1);
}

.hero-slide img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 830px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--signal);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

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

h1 {
  max-width: 900px;
  margin-bottom: 22px;
  font-size: clamp(42px, 7vw, 82px);
  line-height: 0.98;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(30px, 4vw, 52px);
  line-height: 1.05;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 22px;
  line-height: 1.18;
}

.hero p {
  max-width: 760px;
  font-size: clamp(18px, 2vw, 22px);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.button {
  display: inline-flex;
  align-items: center;
  min-height: 46px;
  padding: 12px 18px;
  border: 1px solid rgba(255, 255, 255, 0.7);
  text-decoration: none;
  font-weight: 700;
}

.button.primary {
  color: #09202b;
  background: #fff;
}

.button.secondary {
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
}

.hero-controls {
  position: absolute;
  right: clamp(20px, 5vw, 72px);
  bottom: 36px;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 12px;
}

.hero-arrow,
.hero-dot {
  border: 1px solid rgba(255, 255, 255, 0.66);
  color: #fff;
  background: rgba(5, 28, 39, 0.38);
  backdrop-filter: blur(10px);
  cursor: pointer;
}

.hero-arrow {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  font-size: 28px;
  line-height: 1;
}

.hero-dots {
  display: flex;
  align-items: center;
  gap: 8px;
}

.hero-dot {
  width: 10px;
  height: 10px;
  padding: 0;
  border-radius: 999px;
}

.hero-dot.is-active {
  width: 34px;
  background: #fff;
}

.section {
  padding: 82px clamp(20px, 5vw, 72px);
}

.logo-band {
  padding-top: 34px;
  padding-bottom: 34px;
  background: #fff;
}

.logo-card {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(22px, 5vw, 74px);
  max-width: 980px;
  margin: 0 auto;
}

.logo-card img {
  width: auto;
  max-width: min(280px, 42vw);
  max-height: 104px;
  object-fit: contain;
}

.intro {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(280px, 0.95fr);
  gap: clamp(28px, 6vw, 72px);
  align-items: start;
  background: #fff;
}

.section-copy p {
  max-width: 760px;
  color: var(--muted);
  font-size: 18px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.stat-card {
  min-height: 138px;
  padding: 22px;
  border: 1px solid var(--line);
  background: var(--sky);
}

.stat-card strong {
  display: block;
  margin-bottom: 8px;
  color: var(--ocean-dark);
  font-size: 34px;
  line-height: 1;
}

.stat-card span {
  color: #33464f;
}

.section-heading {
  max-width: 920px;
  margin-bottom: 34px;
}

.observatories-grid,
.technology-grid,
.achievements-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.observatory-card,
.technology-card,
.achievement {
  background: var(--panel);
  border: 1px solid var(--line);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.02);
}

.observatory-card img,
.technology-card img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  background: #d5dde0;
}

.observatory-card > div,
.technology-card > div,
.achievement {
  padding: 22px;
}

.meta {
  margin-bottom: 8px;
  color: var(--ocean);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
}

.observatory-card p,
.technology-card p,
.achievement p {
  color: var(--muted);
}

.observatory-card ul {
  margin: 18px 0 0;
  padding-left: 18px;
  color: #344851;
}

.technology-band {
  background: var(--ocean-dark);
  color: #fff;
}

.technology-band .eyebrow {
  color: var(--mint);
}

.technology-card {
  color: var(--ink);
}

.applications {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(280px, 1.1fr);
  gap: clamp(28px, 6vw, 72px);
  background: #fff;
}

.applications ul {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.applications li {
  padding: 16px 18px;
  border-left: 4px solid var(--signal);
  background: var(--paper);
  color: #32464f;
}

.achievement {
  min-height: 236px;
}

.achievement-top {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 28px;
  color: var(--ocean);
  font-size: 14px;
  font-weight: 700;
}

.achievement-top b {
  color: var(--signal);
}

.partners {
  background: #fff;
}

.partner-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.partner-logo {
  display: grid;
  place-items: center;
  min-height: 104px;
  padding: 18px;
  border: 1px solid var(--line);
  color: #253942;
  font-weight: 700;
  text-align: center;
  text-decoration: none;
}

.partner-logo img {
  max-width: 190px;
  max-height: 70px;
  object-fit: contain;
}

.contact {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.75fr);
  gap: clamp(28px, 6vw, 72px);
  padding: 82px clamp(20px, 5vw, 72px);
  color: #fff;
  background: linear-gradient(135deg, #09202b, #07566c);
}

.contact p {
  max-width: 760px;
  color: #d9ebef;
}

address {
  display: grid;
  align-content: start;
  gap: 12px;
  font-style: normal;
}

address a {
  display: block;
  padding: 16px 18px;
  background: rgba(255, 255, 255, 0.1);
  text-decoration: none;
  overflow-wrap: anywhere;
}

@media (max-width: 980px) {
  .intro,
  .applications,
  .contact {
    grid-template-columns: 1fr;
  }

  .observatories-grid,
  .technology-grid,
  .achievements-grid,
  .partner-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 680px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  nav,
  .primary-menu {
    justify-content: flex-start;
  }

  .hero {
    min-height: 720px;
    padding-top: 130px;
  }

  .hero-controls {
    right: auto;
    left: 20px;
    bottom: 26px;
  }

  .logo-card {
    flex-direction: column;
  }

  .stats-grid,
  .observatories-grid,
  .technology-grid,
  .achievements-grid,
  .partner-strip {
    grid-template-columns: 1fr;
  }

  .section,
  .contact {
    padding-top: 58px;
    padding-bottom: 58px;
  }
}