:root {
  --paper: #f3f1e8;
  --ink: #111510;
  --soft-ink: #4d554c;
  --line: rgba(17, 21, 16, 0.22);
  --cool: #b7dfe0;
  --cool-deep: #7bbec3;
  --cool-dark: #1b4447;
  --max: 1440px;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  background: var(--paper);
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 78% 14%, rgba(183,223,224,.4), transparent 25rem),
    var(--paper);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 16px;
  line-height: 1.45;
}

a { color: inherit; }

.skip-link {
  position: fixed;
  top: 0;
  left: 0;
  transform: translateY(-120%);
  background: var(--ink);
  color: white;
  padding: .75rem 1rem;
  z-index: 100;
}
.skip-link:focus { transform: translateY(0); }

.site-header {
  width: min(calc(100% - 48px), var(--max));
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 84px;
  border-bottom: 1px solid var(--line);
}

.brand,
.footer-brand {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -.04em;
  text-decoration: none;
}

.site-nav {
  display: flex;
  gap: clamp(1rem, 3vw, 2.5rem);
}
.site-nav a {
  text-decoration: none;
  font-size: .85rem;
}
.site-nav a:hover,
.site-footer a:hover,
.down-link:hover { text-decoration: underline; text-underline-offset: 4px; }

.hero {
  position: relative;
  width: min(calc(100% - 48px), var(--max));
  min-height: calc(100vh - 84px);
  margin: 0 auto;
  padding: clamp(60px, 8vw, 120px) 0 72px;
  overflow: hidden;
}

.hero-meta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .12em;
}

.hero h1,
.section h2 {
  font-weight: 500;
  letter-spacing: -.065em;
  line-height: .9;
  margin: 0;
}

.hero h1 {
  position: relative;
  z-index: 2;
  max-width: 850px;
  margin-top: clamp(50px, 7vw, 100px);
  font-size: clamp(5rem, 13vw, 12rem);
}

.hero-copy {
  position: relative;
  z-index: 2;
  margin-top: clamp(40px, 5vw, 78px);
  max-width: 590px;
  font-size: clamp(1.1rem, 2vw, 1.55rem);
}
.hero-copy p { margin: .18rem 0; }

.down-link {
  position: absolute;
  z-index: 3;
  right: 0;
  bottom: 72px;
  text-decoration: none;
  font-size: .9rem;
}

.cooling-orbit {
  position: absolute;
  right: clamp(-120px, 2vw, 30px);
  top: 18%;
  width: min(42vw, 570px);
  aspect-ratio: 1;
  opacity: .92;
}
.orbit,
.core {
  position: absolute;
  border-radius: 50%;
  inset: 50%;
  transform: translate(-50%, -50%);
}
.orbit {
  border: 1px solid rgba(27,68,71,.28);
}
.orbit-one { width: 100%; height: 100%; }
.orbit-two { width: 72%; height: 72%; }
.orbit-three { width: 45%; height: 45%; }
.core {
  width: 19%;
  height: 19%;
  background: var(--cool-deep);
  box-shadow: 0 0 80px rgba(123,190,195,.55);
}

.section {
  width: min(calc(100% - 48px), var(--max));
  margin: 0 auto;
  padding: clamp(90px, 11vw, 170px) 0;
  border-top: 1px solid var(--line);
}

.section-label,
.step-label,
.enquiries > span {
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .13em;
}

.section-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(280px, .75fr);
  gap: clamp(40px, 9vw, 150px);
  align-items: start;
  margin-top: 38px;
}

.section h2 {
  font-size: clamp(3.6rem, 8.5vw, 8.2rem);
}

.copy-stack,
.lead-copy {
  font-size: clamp(1.08rem, 1.8vw, 1.45rem);
  max-width: 640px;
  color: var(--soft-ink);
}
.copy-stack p:first-child { margin-top: 0; }

.approaches {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 90px;
}
.approaches span {
  display: inline-flex;
  border: 1px solid var(--ink);
  border-radius: 999px;
  padding: .7rem 1rem;
  font-size: .83rem;
}

.section-development {
  position: relative;
}
.development-steps {
  margin-top: 90px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--line);
}
.development-steps article {
  padding: 34px 36px 26px 0;
  min-height: 260px;
}
.development-steps article + article {
  border-left: 1px solid var(--line);
  padding-left: 36px;
}
.development-steps h3,
.partner-grid h3 {
  font-weight: 500;
  font-size: clamp(1.7rem, 3vw, 2.7rem);
  letter-spacing: -.045em;
  margin: 34px 0 18px;
}
.development-steps p,
.partner-grid p {
  color: var(--soft-ink);
  max-width: 520px;
}
.technical-note {
  margin: 70px 0 0 auto;
  max-width: 680px;
  padding-left: 24px;
  border-left: 3px solid var(--cool-deep);
  color: var(--soft-ink);
  font-size: .95rem;
}

.section-involved {
  background: var(--ink);
  color: var(--paper);
  width: 100%;
  max-width: none;
  padding-left: max(24px, calc((100vw - var(--max)) / 2));
  padding-right: max(24px, calc((100vw - var(--max)) / 2));
  border-top: none;
}
.section-involved .lead-copy,
.section-involved .partner-grid p { color: rgba(243,241,232,.7); }

.partner-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-top: 100px;
  border-top: 1px solid rgba(243,241,232,.25);
}
.partner-grid article {
  padding: 30px 34px 30px 0;
}
.partner-grid article + article {
  border-left: 1px solid rgba(243,241,232,.25);
  padding-left: 34px;
}
.partner-grid > article > span {
  font-size: .7rem;
  opacity: .55;
}

.enquiries {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 20px;
  margin-top: 115px;
  padding-top: 28px;
  border-top: 1px solid rgba(243,241,232,.25);
}
.enquiries a {
  font-size: clamp(1.7rem, 5vw, 5rem);
  letter-spacing: -.055em;
  text-decoration: none;
}

.site-footer {
  min-height: 180px;
  width: min(calc(100% - 48px), var(--max));
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  gap: 24px;
  align-items: center;
  font-size: .84rem;
}
.site-footer p { color: var(--soft-ink); }
.site-footer a { text-decoration: none; }

@media (max-width: 800px) {
  .site-header {
    width: min(calc(100% - 32px), var(--max));
    min-height: 72px;
  }

  .site-nav { gap: 1rem; }
  .site-nav a { font-size: .76rem; }

  .hero,
  .section {
    width: min(calc(100% - 32px), var(--max));
  }

  .hero {
    min-height: 800px;
    padding-top: 58px;
  }

  .hero h1 {
    font-size: clamp(4.3rem, 24vw, 8rem);
  }

  .cooling-orbit {
    width: 82vw;
    right: -42vw;
    top: 34%;
    opacity: .65;
  }

  .down-link {
    left: 0;
    right: auto;
    bottom: 50px;
  }

  .section-grid,
  .development-steps,
  .partner-grid {
    grid-template-columns: 1fr;
  }

  .section-grid { gap: 40px; }

  .development-steps article + article,
  .partner-grid article + article {
    border-left: 0;
    border-top: 1px solid var(--line);
    padding-left: 0;
  }

  .section-involved {
    width: 100%;
    padding-left: 16px;
    padding-right: 16px;
  }
  .section-involved .partner-grid article + article {
    border-top-color: rgba(243,241,232,.25);
  }

  .enquiries {
    align-items: flex-start;
    flex-direction: column;
  }

  .site-footer {
    width: min(calc(100% - 32px), var(--max));
    grid-template-columns: 1fr;
    padding: 42px 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}