/* ===========================================================================
   Acheron Defense — design system
   Deep-green tactical dark. Anduril restraint + cinematic depth.
   =========================================================================== */
:root {
  --bg:        #030705;
  --bg-2:      #06120c;
  --green:     #39d98a;   /* primary jade accent */
  --green-hi:  #6ff2b5;
  --green-dim: #155c3c;
  --ink:       #e7f0ea;
  --muted:     #8fa89b;
  --faint:     #5f7468;
  --line:      rgba(120, 190, 150, 0.14);
  --line-2:    rgba(120, 190, 150, 0.28);
  --panel:     rgba(10, 26, 18, 0.55);
  --panel-2:   rgba(12, 30, 21, 0.8);
  --maxw:      1240px;
  --ease:      cubic-bezier(0.22, 1, 0.36, 1);
  --display:   'Orbitron', 'Space Grotesk', system-ui, sans-serif;
  --sans:      'Space Grotesk', system-ui, -apple-system, Segoe UI, sans-serif;
  color-scheme: dark;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--sans);
  color: var(--ink);
  background:
    radial-gradient(1200px 760px at 22% 8%, #0e2c1d 0%, rgba(14,44,29,0) 60%),
    radial-gradient(1000px 700px at 88% 22%, #0a2417 0%, rgba(10,36,23,0) 55%),
    radial-gradient(900px 900px at 50% 120%, #0a2014 0%, rgba(10,32,20,0) 60%),
    linear-gradient(180deg, #040b07 0%, #030705 100%);
  background-attachment: fixed;
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img, svg { max-width: 100%; display: block; }
::selection { background: var(--green); color: #042014; }

/* Fixed WebGL canvas behind everything */
#bg {
  position: fixed; inset: 0; width: 100%; height: 100%;
  z-index: 0; pointer-events: none;
}
.page { position: relative; z-index: 1; }

.wrap { width: min(100% - 2.6rem, var(--maxw)); margin-inline: auto; }

/* ---- Shared atoms --------------------------------------------------------- */
.eyebrow {
  font-family: var(--display);
  font-size: 0.72rem; font-weight: 600;
  letter-spacing: 0.34em; text-transform: uppercase;
  color: var(--green);
  display: inline-flex; align-items: center; gap: 0.7rem;
}
.eyebrow::before {
  content: ''; width: 26px; height: 1px; background: var(--green); opacity: 0.7;
}
h1, h2, h3 { font-family: var(--display); font-weight: 700; line-height: 1.05; letter-spacing: -0.01em; }
.section { padding: clamp(4.5rem, 9vw, 8.5rem) 0; position: relative; }
.section__head { max-width: 720px; margin-bottom: clamp(2.5rem, 5vw, 4rem); }
.section__head h2 {
  font-size: clamp(1.9rem, 4.4vw, 3.2rem); margin: 1rem 0 1.1rem;
}
.section__head p { color: var(--muted); font-size: 1.06rem; max-width: 60ch; }

.btn {
  --bc: var(--green);
  display: inline-flex; align-items: center; gap: 0.6rem;
  font-family: var(--display); font-size: 0.78rem; font-weight: 600;
  letter-spacing: 0.18em; text-transform: uppercase;
  padding: 0.95rem 1.6rem; color: #04130c; background: var(--green);
  border: 1px solid var(--bc); border-radius: 2px;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), background .3s;
  box-shadow: 0 0 0 rgba(57,217,138,0);
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 14px 40px -12px rgba(57,217,138,0.55); }
.btn--ghost {
  background: transparent; color: var(--ink); --bc: var(--line-2);
}
.btn--ghost:hover { background: rgba(57,217,138,0.08); border-color: var(--green); box-shadow: none; transform: translateY(-2px); }
.btn svg { width: 14px; height: 14px; }

/* ---- Nav ------------------------------------------------------------------ */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 40;
  transition: background .35s var(--ease), backdrop-filter .35s, border-color .35s;
  border-bottom: 1px solid transparent;
}
.nav.is-scrolled {
  background: rgba(4, 11, 7, 0.72);
  backdrop-filter: blur(14px) saturate(1.2);
  border-bottom-color: var(--line);
}
.nav__inner { display: flex; align-items: center; justify-content: space-between; padding: 1rem 0; }
.brand { display: flex; align-items: center; gap: 0.7rem; }
.brand img { height: 30px; width: auto; filter: drop-shadow(0 0 14px rgba(57,217,138,0.18)); }
.brand__txt { font-family: var(--display); font-weight: 700; letter-spacing: 0.22em; font-size: 0.82rem; }
.brand__txt span { color: var(--green); }
.nav__links { display: flex; align-items: center; gap: 2rem; }
.nav__links a {
  font-family: var(--display); font-size: 0.74rem; font-weight: 500;
  letter-spacing: 0.16em; text-transform: uppercase; color: var(--muted);
  transition: color .25s; position: relative;
}
.nav__links a:not(.btn):hover { color: var(--ink); }
.nav__links a:not(.btn)::after {
  content: ''; position: absolute; left: 0; bottom: -6px; height: 1px; width: 0;
  background: var(--green); transition: width .3s var(--ease);
}
.nav__links a:not(.btn):hover::after { width: 100%; }
.nav__toggle { display: none; background: none; border: 0; color: var(--ink); cursor: pointer; padding: 8px; }
.nav__toggle span { display: block; width: 24px; height: 2px; background: currentColor; margin: 5px 0; transition: .3s; }

/* ---- Hero ----------------------------------------------------------------- */
.hero { min-height: 100svh; display: flex; align-items: center; position: relative; padding-top: 5rem; }
.hero__grid {
  position: absolute; inset: 0; z-index: 0; pointer-events: none; opacity: 0.5;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(circle at 50% 42%, #000 0%, transparent 72%);
          mask-image: radial-gradient(circle at 50% 42%, #000 0%, transparent 72%);
}
.hero__inner { position: relative; z-index: 2; max-width: 880px; }
.hero__logo { width: clamp(190px, 30vw, 300px); margin-bottom: 2rem; filter: drop-shadow(0 8px 40px rgba(57,217,138,0.22)); }
.hero h1 {
  font-size: clamp(2.6rem, 7vw, 5.6rem);
  text-transform: uppercase; letter-spacing: 0.01em;
}
.hero h1 .accent { color: var(--green); }
.hero__lede {
  margin: 1.6rem 0 2.4rem; font-size: clamp(1.05rem, 2.2vw, 1.35rem);
  color: var(--muted); max-width: 56ch;
}
.hero__cta { display: flex; flex-wrap: wrap; gap: 1rem; }
.hero__meta {
  position: absolute; left: 0; right: 0; bottom: clamp(1.2rem, 4vh, 2.4rem); z-index: 2;
  display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
  font-family: var(--display); font-size: 0.66rem; letter-spacing: 0.22em;
  text-transform: uppercase; color: var(--faint);
}
.hero__meta span { display: inline-flex; align-items: center; gap: 0.6rem; }
.hero__meta .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--green); box-shadow: 0 0 10px var(--green); animation: pulse 2.4s infinite; }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.35; } }

/* ---- Capabilities grid ---------------------------------------------------- */
.cap-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.cap {
  background: var(--bg-2); padding: clamp(1.8rem, 3vw, 2.6rem); position: relative;
  transition: background .4s var(--ease); overflow: hidden;
}
.cap::before {
  content: ''; position: absolute; left: 0; top: 0; width: 100%; height: 2px;
  background: linear-gradient(90deg, var(--green), transparent);
  transform: scaleX(0); transform-origin: left; transition: transform .5s var(--ease);
}
.cap:hover { background: #08180f; }
.cap:hover::before { transform: scaleX(1); }
.cap__no { font-family: var(--display); font-size: 0.72rem; letter-spacing: 0.2em; color: var(--green); }
.cap__icon { width: 38px; height: 38px; margin: 1.4rem 0 1.2rem; color: var(--green); }
.cap h3 { font-size: 1.25rem; margin-bottom: 0.7rem; }
.cap p { color: var(--muted); font-size: 0.97rem; }

/* ---- Split / tech --------------------------------------------------------- */
.split { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: clamp(2rem, 5vw, 5rem); align-items: center; }
.split__media {
  border: 1px solid var(--line); background: var(--panel); border-radius: 4px;
  padding: clamp(2rem, 4vw, 3.4rem); position: relative; min-height: 340px;
  display: grid; place-items: center;
  background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 32px 32px;
}
.split__media img { width: min(78%, 360px); filter: drop-shadow(0 0 50px rgba(57,217,138,0.25)); animation: float 7s ease-in-out infinite; }
@keyframes float { 0%,100% { transform: translateY(-8px); } 50% { transform: translateY(8px); } }
.feat-list { list-style: none; margin-top: 1.8rem; display: grid; gap: 1.1rem; }
.feat-list li { display: grid; grid-template-columns: auto 1fr; gap: 0.9rem; align-items: start; color: var(--muted); }
.feat-list .tick { color: var(--green); margin-top: 2px; flex: none; }
.feat-list strong { color: var(--ink); font-weight: 600; display: block; font-family: var(--display); font-size: 0.92rem; letter-spacing: 0.02em; }

/* ---- Stats ---------------------------------------------------------------- */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border-block: 1px solid var(--line); }
.stat { background: var(--bg); padding: clamp(2rem, 4vw, 3rem) 1.4rem; text-align: center; }
.stat__num { font-family: var(--display); font-weight: 800; font-size: clamp(2.2rem, 5vw, 3.4rem); color: var(--ink); line-height: 1; }
.stat__num .u { color: var(--green); }
.stat__label { margin-top: 0.7rem; font-size: 0.74rem; letter-spacing: 0.18em; text-transform: uppercase; color: var(--faint); }

/* ---- CTA ------------------------------------------------------------------ */
.cta { text-align: center; }
.cta__panel {
  border: 1px solid var(--line-2); border-radius: 6px; padding: clamp(3rem, 7vw, 6rem) 1.5rem;
  background:
    radial-gradient(600px 300px at 50% 0%, rgba(57,217,138,0.12), transparent 70%),
    var(--panel-2);
  position: relative; overflow: hidden;
}
.cta h2 { font-size: clamp(2rem, 5vw, 3.6rem); text-transform: uppercase; }
.cta p { color: var(--muted); max-width: 52ch; margin: 1.2rem auto 2.2rem; }

/* ---- Footer --------------------------------------------------------------- */
.footer { border-top: 1px solid var(--line); padding: 3.5rem 0 2.5rem; }
.footer__top { display: flex; justify-content: space-between; gap: 2rem; flex-wrap: wrap; margin-bottom: 2.6rem; }
.footer__brand { max-width: 320px; }
.footer__brand img { height: 34px; margin-bottom: 1rem; }
.footer__brand p { color: var(--faint); font-size: 0.92rem; }
.footer__cols { display: flex; gap: clamp(2rem, 6vw, 5rem); flex-wrap: wrap; }
.footer__col h4 { font-family: var(--display); font-size: 0.72rem; letter-spacing: 0.2em; text-transform: uppercase; color: var(--green); margin-bottom: 1rem; }
.footer__col a, .footer__col span { display: block; color: var(--muted); font-size: 0.9rem; margin-bottom: 0.6rem; transition: color .25s; }
.footer__col a:hover { color: var(--ink); }
.footer__bar { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; padding-top: 1.8rem; border-top: 1px solid var(--line); color: var(--faint); font-size: 0.78rem; letter-spacing: 0.04em; }

/* ---- Reveal --------------------------------------------------------------- */
[data-reveal] { opacity: 0; transform: translateY(28px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
[data-reveal].in { opacity: 1; transform: none; }
[data-reveal][data-delay="1"] { transition-delay: .08s; }
[data-reveal][data-delay="2"] { transition-delay: .16s; }
[data-reveal][data-delay="3"] { transition-delay: .24s; }

/* ---- Responsive ----------------------------------------------------------- */
@media (max-width: 920px) {
  .cap-grid { grid-template-columns: repeat(2, 1fr); }
  .split { grid-template-columns: 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 720px) {
  .nav__toggle { display: block; }
  .nav__links {
    position: fixed; inset: 0 0 0 auto; width: min(78vw, 320px);
    flex-direction: column; align-items: flex-start; justify-content: center; gap: 1.8rem;
    background: rgba(5, 14, 9, 0.97); backdrop-filter: blur(16px);
    padding: 2rem; transform: translateX(100%); transition: transform .4s var(--ease);
    border-left: 1px solid var(--line);
  }
  body.nav-open .nav__links { transform: none; }
  body.nav-open .nav__toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  body.nav-open .nav__toggle span:nth-child(2) { opacity: 0; }
  body.nav-open .nav__toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
}
@media (max-width: 560px) {
  .cap-grid { grid-template-columns: 1fr; }
  .stats { grid-template-columns: 1fr 1fr; }
  .hero__meta { font-size: 0.58rem; }
}
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; scroll-behavior: auto; }
  [data-reveal] { opacity: 1; transform: none; }
}