/* ============================================================
   Argus Artificial Superintelligence — Light Theme
   For: argus-asi.systems landing page
   Aesthetic: Stripe / Anthropic / Vercel / Linear quality bar
   ============================================================ */

:root {
  --argus-paper:       #FFFFFF;
  --argus-paper-2:     #FAFAF8;
  --argus-paper-3:     #F2F2EE;
  --argus-ink:         #0A1428;
  --argus-ink-2:       #1A2540;
  --argus-ink-mute:    #5A627A;
  --argus-ink-faint:   #9CA3AF;
  --argus-line:        rgba(10, 20, 40, 0.08);
  --argus-line-strong: rgba(10, 20, 40, 0.16);
  --argus-cyan:        #0891B2;       /* desaturated for white bg */
  --argus-cyan-soft:   #67E8F9;
  --argus-cyan-glow:   rgba(34, 211, 238, 0.10);
  --argus-gold:        #B8860B;       /* deeper for white bg */
  --argus-gold-soft:   #D4AF37;

  --font-display: "Space Grotesk", "Inter", -apple-system, system-ui, sans-serif;
  --font-body:    "Inter", -apple-system, system-ui, sans-serif;
  --font-mono:    "JetBrains Mono", "SF Mono", "Menlo", monospace;

  --easing: cubic-bezier(0.22, 1, 0.36, 1);
}

* { box-sizing: border-box; }

html, body {
  margin: 0; padding: 0;
  background: var(--argus-paper);
  color: var(--argus-ink);
  font-family: var(--font-body);
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body { font-size: 17px; line-height: 1.55; letter-spacing: -0.005em; }

a { color: var(--argus-ink); text-decoration: none; }
a:hover { color: var(--argus-cyan); }

img { max-width: 100%; display: block; }

.mono { font-family: var(--font-mono); letter-spacing: 0.01em; }
.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--argus-cyan);
}
.muted { color: var(--argus-ink-mute); }
.faint { color: var(--argus-ink-faint); }
.gold { color: var(--argus-gold); }
.cyan { color: var(--argus-cyan); }

/* ============================================================
   Top nav (sticky, glass-blur)
   ============================================================ */

.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 40px;
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .25s var(--easing), background .25s var(--easing);
}

.nav.scrolled {
  border-bottom-color: var(--argus-line);
  background: rgba(255, 255, 255, 0.88);
}

.nav .brand {
  display: flex; align-items: center; gap: 10px;
}

.nav .brand img {
  width: 28px; height: 28px;
}

.nav .brand .word {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 16px;
  letter-spacing: -0.01em;
  color: var(--argus-ink);
}

.nav .links {
  display: flex; align-items: center; gap: 28px;
}

.nav .links a {
  font-size: 14px;
  font-weight: 500;
  color: var(--argus-ink-mute);
  letter-spacing: 0.005em;
  transition: color .2s var(--easing);
}
.nav .links a:hover { color: var(--argus-ink); }

.nav .domain {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--argus-ink-faint);
}

@media (max-width: 720px) {
  .nav { padding: 14px 22px; }
  .nav .links { gap: 16px; }
  .nav .domain { display: none; }
}

/* ============================================================
   Section primitives
   ============================================================ */

section {
  position: relative;
  padding: 120px 40px;
}

.container {
  max-width: 1180px;
  margin: 0 auto;
  position: relative;
}

.section-h {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--argus-ink);
  margin: 0 0 28px;
  max-width: 18ch;
}

.section-lead {
  font-size: 1.18rem;
  color: var(--argus-ink-mute);
  max-width: 56ch;
  margin: 0 0 48px;
  line-height: 1.55;
}

/* ============================================================
   1 · HERO
   ============================================================ */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 140px 40px 80px;
  overflow: hidden;
  background: var(--argus-paper);
}

.hero-canvas {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 50% 60% at 80% 50%, var(--argus-cyan-glow), transparent 65%),
    radial-gradient(ellipse 30% 40% at 75% 50%, rgba(184, 134, 11, 0.06), transparent 60%);
  z-index: 0;
  pointer-events: none;
}

.hero .container {
  z-index: 2;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 60px;
  align-items: center;
}

@media (max-width: 960px) { .hero-grid { grid-template-columns: 1fr; gap: 40px; } }

.hero-copy .eyebrow { display: block; margin-bottom: 28px; }

.hero h1 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2.8rem, 5.4vw, 4.6rem);
  line-height: 1.02;
  letter-spacing: -0.025em;
  color: var(--argus-ink);
  margin: 0 0 8px;
}

.hero h1 .asi {
  display: block;
  color: var(--argus-cyan);
  font-weight: 500;
  font-size: 0.5em;
  letter-spacing: -0.005em;
  margin-top: 8px;
}

.hero .tagline {
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 1.8vw, 1.4rem);
  font-weight: 400;
  color: var(--argus-ink-mute);
  margin: 24px 0 36px;
  max-width: 22ch;
  line-height: 1.35;
}

.hero .meta-line {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--argus-ink-faint);
  letter-spacing: 0.06em;
  margin-bottom: 32px;
}

.cta-row {
  display: flex; gap: 14px; flex-wrap: wrap;
}

.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 22px;
  border-radius: 999px;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0;
  border: 1px solid var(--argus-line-strong);
  background: transparent;
  color: var(--argus-ink);
  cursor: pointer;
  transition: transform .2s var(--easing), background .2s var(--easing), border-color .2s var(--easing);
}

.btn .arrow { transition: transform .2s var(--easing); }
.btn:hover .arrow { transform: translateX(3px); }

.btn-primary {
  background: var(--argus-ink);
  color: var(--argus-paper);
  border-color: var(--argus-ink);
}
.btn-primary:hover { background: var(--argus-ink-2); transform: translateY(-1px); }

.btn-ghost:hover { border-color: var(--argus-ink); }

/* Right pane: hero image + math overlay */
.hero-art {
  position: relative;
  aspect-ratio: 1 / 1;
  border-radius: 24px;
  overflow: hidden;
  background: var(--argus-paper-2);
  border: 1px solid var(--argus-line);
}

.hero-art img {
  width: 100%; height: 100%;
  object-fit: cover;
  opacity: 0.95;
}

.hero-art .formula {
  position: absolute;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--argus-ink-faint);
  letter-spacing: 0.04em;
  pointer-events: none;
}
.hero-art .formula.f1 { top: 18px; right: 22px; }
.hero-art .formula.f2 { bottom: 22px; left: 22px; }

/* ============================================================
   Mission strip
   ============================================================ */

.mission {
  text-align: center;
  padding: 100px 40px;
  background: var(--argus-paper-2);
  position: relative;
  overflow: hidden;
}

.mission::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url("../assets/texture-geometry.png");
  background-size: 600px;
  background-repeat: no-repeat;
  background-position: center;
  opacity: 0.45;
  pointer-events: none;
}

.mission .container {
  z-index: 1;
  max-width: 820px;
}

.mission .eyebrow { display: block; margin-bottom: 24px; }

.mission p.lede {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(1.4rem, 2.2vw, 1.9rem);
  line-height: 1.4;
  color: var(--argus-ink);
  letter-spacing: -0.015em;
  margin: 0;
  max-width: 30ch;
  margin-left: auto;
  margin-right: auto;
}

/* ============================================================
   What we do — three cards
   ============================================================ */

.dpp-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}

@media (max-width: 800px) { .dpp-grid { grid-template-columns: 1fr; } }

.dpp-card {
  border: 1px solid var(--argus-line);
  border-radius: 18px;
  padding: 32px 28px;
  background: var(--argus-paper);
  transition: border-color .25s var(--easing), transform .25s var(--easing);
}

.dpp-card:hover {
  border-color: var(--argus-cyan);
  transform: translateY(-3px);
}

.dpp-card .num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--argus-cyan);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-bottom: 18px;
}

.dpp-card .nm {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.6rem;
  color: var(--argus-ink);
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.dpp-card .desc {
  font-size: 15px;
  color: var(--argus-ink-mute);
  line-height: 1.5;
  margin: 0;
}

/* ============================================================
   Numbers band
   ============================================================ */

.numbers {
  background: var(--argus-paper);
  border-top: 1px solid var(--argus-line);
  border-bottom: 1px solid var(--argus-line);
  padding: 80px 40px;
}

.numbers-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-top: 36px;
}

@media (max-width: 720px) { .numbers-grid { grid-template-columns: 1fr; gap: 24px; } }

.num-card {
  border-left: 2px solid var(--argus-cyan);
  padding: 4px 0 4px 22px;
}
.num-card .num {
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 4.5vw, 3.8rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  color: var(--argus-gold);
  line-height: 1;
}
.num-card .lbl {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--argus-cyan);
  text-transform: uppercase;
  margin-top: 12px;
}
.num-card .sub {
  font-size: 14px;
  color: var(--argus-ink-mute);
  margin-top: 8px;
}

.numbers-foot {
  margin-top: 32px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--argus-ink-faint);
  letter-spacing: 0.04em;
}

/* ============================================================
   Generative art panel (canvas)
   ============================================================ */

.genart {
  position: relative;
  padding: 0;
  height: 60vh;
  min-height: 480px;
  overflow: hidden;
  background: var(--argus-paper-2);
  border-top: 1px solid var(--argus-line);
  border-bottom: 1px solid var(--argus-line);
}
.genart canvas {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  display: block;
}
.genart .caption {
  position: absolute;
  bottom: 28px; left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-display);
  font-size: clamp(1.05rem, 1.6vw, 1.3rem);
  color: var(--argus-ink);
  letter-spacing: -0.01em;
  text-align: center;
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(8px);
  padding: 12px 20px;
  border-radius: 999px;
  border: 1px solid var(--argus-line);
}

/* ============================================================
   Manifesto
   ============================================================ */

.manifesto {
  background: var(--argus-paper);
  padding: 120px 40px;
}

.manifesto .container { max-width: 760px; }

.manifesto .eyebrow { display: block; margin-bottom: 28px; }

.manifesto h2 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.9rem, 3.2vw, 2.6rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--argus-ink);
  margin: 0 0 36px;
  max-width: 22ch;
}

.manifesto p {
  font-size: 1.08rem;
  line-height: 1.65;
  color: var(--argus-ink-2);
  margin: 0 0 22px;
}

.manifesto p strong {
  color: var(--argus-ink);
  font-weight: 600;
}

/* ============================================================
   Coverage marquee
   ============================================================ */

.coverage {
  background: var(--argus-paper);
  padding: 60px 0;
  border-top: 1px solid var(--argus-line);
  border-bottom: 1px solid var(--argus-line);
  overflow: hidden;
}

.cov-marquee {
  display: flex;
  gap: 56px;
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 2.8vw, 2.3rem);
  font-weight: 400;
  color: var(--argus-ink-faint);
  letter-spacing: -0.005em;
  white-space: nowrap;
  animation: scroll-marquee 36s linear infinite;
}

.cov-marquee .dot { color: var(--argus-cyan); }
.cov-marquee .item:hover { color: var(--argus-ink); }

@keyframes scroll-marquee {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

/* ============================================================
   Operating model line
   ============================================================ */

.opmodel {
  background: var(--argus-paper-2);
  padding: 100px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.opmodel::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url("../assets/texture-network.png");
  background-size: cover;
  background-position: center;
  opacity: 0.5;
  pointer-events: none;
}

.opmodel .container {
  z-index: 1;
  max-width: 820px;
}

.opmodel h2 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(1.8rem, 3.2vw, 2.4rem);
  letter-spacing: -0.015em;
  line-height: 1.25;
  color: var(--argus-ink);
  margin: 0 0 16px;
}

.opmodel .sub {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--argus-cyan);
}

/* ============================================================
   Contact
   ============================================================ */

.contact {
  background: var(--argus-paper);
  padding: 120px 40px;
}

.contact .container {
  max-width: 760px;
  text-align: center;
}

.contact .eyebrow { display: block; margin-bottom: 22px; }

.contact h2 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2.2rem, 4vw, 3.2rem);
  letter-spacing: -0.025em;
  margin: 0 0 28px;
  color: var(--argus-ink);
  line-height: 1.05;
  max-width: 18ch;
  margin-left: auto;
  margin-right: auto;
}

.contact .lead {
  font-size: 1.1rem;
  color: var(--argus-ink-mute);
  margin: 0 auto 36px;
  max-width: 50ch;
}

.contact .cta-mail {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 18px;
  padding: 16px 28px;
  border: 1px solid var(--argus-ink);
  border-radius: 999px;
  color: var(--argus-ink);
  letter-spacing: 0.04em;
  transition: background .2s var(--easing), color .2s var(--easing);
}
.contact .cta-mail:hover { background: var(--argus-ink); color: var(--argus-paper); }

/* ============================================================
   Footer
   ============================================================ */

footer.foot {
  background: var(--argus-paper);
  border-top: 1px solid var(--argus-line);
  padding: 36px 40px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--argus-ink-faint);
  letter-spacing: 0.06em;
}

.foot-row {
  max-width: 1180px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
}

.foot-tagline {
  text-transform: uppercase;
  letter-spacing: 0.18em;
}

/* ============================================================
   Reveal-on-scroll helpers
   ============================================================ */

.reveal-up {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .9s var(--easing), transform .9s var(--easing);
  will-change: opacity, transform;
}

.reveal-up.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
  .reveal-up { opacity: 1; transform: none; }
}