:root {
  --ink: #eefaff;
  --muted: #9bb2be;
  --night: #030a10;
  --navy: #06131d;
  --panel: #081a25;
  --line: rgba(144, 208, 224, 0.18);
  --cyan: #82e7ef;
  --teal: #38d6bc;
  --amber: #f1bd60;
  --max: 1240px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--night);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
  overflow-x: hidden;
}
a { color: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.skip-link { position: fixed; z-index: 1000; left: 1rem; top: -5rem; padding: .75rem 1rem; background: var(--cyan); color: #001018; font-weight: 800; text-decoration: none; }
.skip-link:focus { top: 1rem; }

.site-header {
  position: fixed; z-index: 50; inset: 0 0 auto; height: 78px; display: flex; align-items: center; justify-content: space-between;
  padding: 0 clamp(1.25rem, 4vw, 4rem); border-bottom: 1px solid transparent; transition: background .3s, border-color .3s, height .3s;
}
.site-header.scrolled { height: 66px; background: rgba(3, 10, 16, .88); border-color: var(--line); backdrop-filter: blur(16px); }
.brand { display: inline-flex; align-items: center; gap: .75rem; color: white; text-decoration: none; letter-spacing: .12em; font-size: .86rem; }
.brand b { letter-spacing: .04em; }
.brand-mark { position: relative; display: grid; place-items: end center; width: 31px; height: 29px; }
.brand-mark i { position: absolute; bottom: 3px; width: 30px; height: 14px; border: 1px solid var(--cyan); border-width: 1px 1px 0 0; transform: skewY(-26deg) rotate(-3deg); opacity: .75; }
.brand-mark i:nth-child(2) { width: 21px; height: 18px; left: 7px; border-color: var(--teal); }
.brand-mark i:nth-child(3) { width: 12px; height: 23px; left: 14px; border-color: white; }
.site-nav { display: flex; align-items: center; gap: clamp(1rem, 2.4vw, 2.2rem); }
.site-nav a { font-size: .72rem; text-transform: uppercase; letter-spacing: .14em; text-decoration: none; color: #bed0d8; transition: color .2s; }
.site-nav a:hover, .site-nav a:focus-visible { color: white; }
.site-nav .nav-contact { padding: .55rem .9rem; border: 1px solid rgba(130,231,239,.45); color: var(--cyan); }
.nav-toggle { display: none; width: 44px; height: 44px; background: transparent; border: 0; }
.nav-toggle i { display: block; width: 24px; height: 1px; background: white; margin: 7px auto; transition: transform .2s; }

.hero { min-height: 100svh; position: relative; display: grid; align-items: center; overflow: hidden; }
.hero::after { content: ""; position: absolute; inset: auto 0 0; height: 32%; background: linear-gradient(transparent, var(--night)); pointer-events: none; }
.hero-image { position: absolute; inset: 0; background-image: linear-gradient(90deg, rgba(2,8,13,.2), transparent 45%), url("assets/images/arctic-mission.jpg"); background-size: cover; background-position: 52% center; transform: scale(1.01); }
.grid-overlay { position: absolute; inset: 0; opacity: .22; background-image: linear-gradient(rgba(140,210,225,.1) 1px, transparent 1px), linear-gradient(90deg, rgba(140,210,225,.1) 1px, transparent 1px); background-size: 80px 80px; mask-image: linear-gradient(90deg, black, transparent 75%); }
.hero-content { position: relative; z-index: 2; width: min(93%, var(--max)); margin: 5rem auto 0; }
.eyebrow, .kicker { color: var(--cyan); font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .67rem; letter-spacing: .2em; text-transform: uppercase; }
.eyebrow { display: flex; gap: 1rem; align-items: center; margin-bottom: 1.6rem; }
.eyebrow span { padding-right: 1rem; border-right: 1px solid var(--line); color: var(--muted); }
h1, h2, h3 { margin: 0; line-height: .95; letter-spacing: -.04em; }
h1 { max-width: 750px; font-size: clamp(4.25rem, 10vw, 9.5rem); text-transform: uppercase; }
h1 em, h2 em { color: var(--cyan); font-style: normal; }
.hero-copy { max-width: 530px; margin: 1.75rem 0 2.25rem; font-size: clamp(1rem, 2vw, 1.25rem); color: #c2d3da; }
.hero-actions { display: flex; flex-wrap: wrap; gap: .8rem; }
.button { display: inline-flex; justify-content: space-between; align-items: center; gap: 2rem; min-width: 210px; padding: .9rem 1rem; font-size: .7rem; letter-spacing: .14em; text-transform: uppercase; text-decoration: none; border: 1px solid var(--line); transition: transform .2s, background .2s, border-color .2s; }
.button:hover, .button:focus-visible { transform: translateY(-2px); }
.button-primary { color: #001015; border-color: var(--cyan); background: var(--cyan); font-weight: 800; }
.button-primary:hover { background: white; border-color: white; }
.button-secondary { background: rgba(2,10,16,.35); backdrop-filter: blur(8px); }
.hero-readout { position: absolute; z-index: 3; right: 4vw; top: 48%; display: grid; width: 200px; font: .6rem/1.8 ui-monospace, monospace; letter-spacing: .16em; color: var(--muted); }
.hero-readout b { color: white; font-weight: 500; }
.hero-readout i { height: 1px; margin-top: .5rem; background: linear-gradient(90deg, var(--cyan) 34%, var(--line) 34%); }
.scroll-cue { position: absolute; z-index: 4; bottom: 2rem; left: 50%; display: flex; gap: 1rem; align-items: center; transform: translateX(-50%); color: var(--muted); text-decoration: none; font: .58rem ui-monospace, monospace; letter-spacing: .2em; text-transform: uppercase; }
.scroll-cue i { width: 1px; height: 34px; background: linear-gradient(var(--cyan), transparent); }

.section { width: min(100% - 2.5rem, var(--max)); margin-inline: auto; padding: clamp(5rem, 10vw, 9rem) 0; }
.section-heading { display: grid; grid-template-columns: 1.5fr 1fr; gap: 4rem; align-items: end; margin-bottom: 3.5rem; }
.section-heading h2, .mission h2, .build-section h2, .contact h2 { font-size: clamp(2.5rem, 5.7vw, 5.4rem); }
.section-heading > p { max-width: 480px; color: var(--muted); font-size: 1rem; }
.kicker { margin: 0 0 1.2rem; }
.program-grid { display: grid; grid-template-columns: repeat(2, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.program-card { position: relative; min-height: 590px; padding: clamp(1.5rem, 3vw, 2.6rem); border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: linear-gradient(145deg, rgba(10,35,46,.55), rgba(3,12,18,.15)); overflow: hidden; transition: background .3s; }
.program-card:hover { background: linear-gradient(145deg, rgba(14,49,59,.72), rgba(3,12,18,.25)); }
.sketch-wrap { position: relative; height: clamp(270px, 28vw, 340px); margin: -1.1rem -1rem 1.3rem; overflow: hidden; border-bottom: 1px solid var(--line); background: #03101a; }
.sketch-wrap::after { content: ""; position: absolute; inset: 0; pointer-events: none; background: linear-gradient(180deg, transparent 64%, rgba(4,13,20,.28)); box-shadow: inset 0 0 35px rgba(2,9,15,.38); }
.tech-illustration { width: 100%; height: 100%; display: block; object-fit: cover; object-position: center; filter: saturate(.88) contrast(1.06); transition: transform .8s ease, filter .35s ease; }
.program-card:hover .tech-illustration { transform: scale(1.025); filter: saturate(1) contrast(1.08); }
.card-index { position: absolute; right: 1.4rem; top: 1.2rem; color: var(--amber); font: .6rem ui-monospace, monospace; }
.program-card h3 { font-size: clamp(1.9rem, 4vw, 3.1rem); text-transform: uppercase; }
.program-card > p { max-width: 510px; color: var(--muted); }
.tags { display: flex; flex-wrap: wrap; gap: .5rem; padding: 0; margin: 1.5rem 0 0; list-style: none; }
.tags li { padding: .35rem .65rem; border: 1px solid var(--line); color: var(--cyan); font: .58rem ui-monospace, monospace; letter-spacing: .14em; text-transform: uppercase; }

.mission { position: relative; min-height: 750px; display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: clamp(2rem, 5vw, 5rem); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.mission-map { position: relative; width: 100%; aspect-ratio: 3 / 2; overflow: hidden; border: 1px solid var(--line); background: #03101a; box-shadow: 0 28px 80px rgba(0,0,0,.28); }
.mission-map::before, .mission-map::after { content: ""; position: absolute; z-index: 2; width: 30px; height: 30px; pointer-events: none; }
.mission-map::before { left: -1px; top: -1px; border-left: 2px solid var(--cyan); border-top: 2px solid var(--cyan); }
.mission-map::after { right: -1px; bottom: -1px; border-right: 2px solid var(--cyan); border-bottom: 2px solid var(--cyan); }
.mission-map img { width: 100%; height: 100%; display: block; object-fit: cover; filter: saturate(.9) contrast(1.04); }
.mission-copy { position: relative; z-index: 2; }
.mission-lead { max-width: 660px; margin: 2rem 0 3rem; color: #c2d3da; font-size: clamp(1.05rem, 2vw, 1.3rem); }
.mission-values { display: grid; grid-template-columns: repeat(3,1fr); gap: 1px; background: var(--line); }
.mission-values div { padding: 1.2rem; background: var(--night); }
.mission-values span { color: var(--amber); font: .65rem ui-monospace, monospace; letter-spacing: .16em; }
.mission-values p { margin: .65rem 0 0; color: var(--muted); font-size: .82rem; }

.build-section { width: min(100% - 2.5rem, 1380px); }
.build-panel { position: relative; padding: clamp(2rem, 6vw, 5.5rem); border: 1px solid rgba(130,231,239,.3); background: linear-gradient(120deg, rgba(9,36,46,.82), rgba(4,13,20,.85)), linear-gradient(90deg, transparent 49.8%, var(--line) 50%, transparent 50.2%); box-shadow: inset 0 0 80px rgba(56,214,188,.05); }
.build-panel::before, .build-panel::after { content: ""; position: absolute; width: 24px; height: 24px; border-color: var(--cyan); }
.build-panel::before { left: -1px; top: -1px; border-left: 2px solid; border-top: 2px solid; }
.build-panel::after { right: -1px; bottom: -1px; border-right: 2px solid; border-bottom: 2px solid; }
.status-light { width: 8px; height: 8px; border-radius: 50%; background: var(--teal); box-shadow: 0 0 18px var(--teal); animation: pulse 2s ease-in-out infinite; }
.build-copy { max-width: 920px; margin-top: 2rem; }
.build-copy > p:last-child { max-width: 700px; margin-top: 2rem; color: var(--muted); }
.build-meter { max-width: 520px; margin-top: 3.5rem; font: .62rem ui-monospace, monospace; color: var(--muted); text-transform: uppercase; letter-spacing: .12em; }
.build-meter > div:first-child { display: flex; justify-content: space-between; }
.build-meter b { color: var(--cyan); font-weight: 500; }
.meter-track { height: 3px; margin: .9rem 0; background: rgba(255,255,255,.08); }
.meter-track i { display: block; width: 28%; height: 100%; background: var(--cyan); box-shadow: 0 0 12px rgba(130,231,239,.7); }

.contact { min-height: 660px; display: grid; place-items: center; text-align: center; }
.contact-inner { max-width: 800px; }
.contact p:not(.kicker) { max-width: 580px; margin: 2rem auto; color: var(--muted); }
.contact .button { min-width: min(100%, 330px); }
.site-footer { width: min(100% - 2.5rem, var(--max)); margin: auto; padding: 2.2rem 0; border-top: 1px solid var(--line); display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 1rem; color: #78919e; font: .6rem ui-monospace, monospace; letter-spacing: .12em; text-transform: uppercase; }
.site-footer p:last-child { text-align: right; }

.js .reveal { opacity: 0; transform: translateY(24px); transition: opacity .75s ease, transform .75s ease; }
.js .reveal.visible { opacity: 1; transform: none; }
@keyframes pulse { 50% { opacity: .35; box-shadow: 0 0 6px var(--teal); } }

@media (max-width: 860px) {
  .site-header { height: 66px; }
  .nav-toggle { display: block; position: relative; z-index: 2; }
  .site-nav { position: fixed; inset: 0; display: grid; place-content: center; gap: 1.5rem; text-align: center; background: rgba(3,10,16,.97); opacity: 0; pointer-events: none; transform: translateY(-12px); transition: .25s; }
  .site-nav.open { opacity: 1; pointer-events: auto; transform: none; }
  .site-nav a { font-size: 1rem; }
  .nav-toggle[aria-expanded="true"] i:first-of-type { transform: translateY(4px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] i:last-of-type { transform: translateY(-4px) rotate(-45deg); }
  .hero-image { background-position: 61% center; }
  .hero-readout { display: none; }
  .section-heading, .mission { grid-template-columns: 1fr; }
  .section-heading { gap: 1.5rem; }
  .mission-map { position: absolute; inset: 12% 0 auto; width: 100%; height: 480px; aspect-ratio: auto; opacity: .28; border-color: transparent; }
  .mission { min-height: 760px; }
  .mission-values { grid-template-columns: 1fr; }
  .site-footer { grid-template-columns: 1fr; text-align: center; justify-items: center; }
  .site-footer p:last-child { text-align: center; }
}

@media (max-width: 640px) {
  .hero { min-height: 820px; }
  .hero-image { background-position: 64% center; }
  .hero-image::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(2,8,13,.42), transparent 80%); }
  .hero-content { margin-top: 2rem; }
  h1 { font-size: clamp(3.5rem, 19vw, 5.8rem); }
  .hero-copy { max-width: 86%; }
  .button { width: 100%; }
  .scroll-cue { display: none; }
  .program-grid { grid-template-columns: 1fr; }
  .program-card { min-height: 530px; }
  .sketch-wrap { height: 250px; }
  .build-panel { background: linear-gradient(130deg, rgba(9,36,46,.9), rgba(4,13,20,.92)); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}