/* ═══════════════════════════════════════════
   BivectorAI — Shared Design System
   Version 1.0 · bivectorai.com
═══════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300;400;500;600;700&family=Inter:wght@300;400;500;600&family=JetBrains+Mono:wght@400;500&display=swap');

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --navy:      #080C18;
  --slate:     #111827;
  --mid:       #1E2A42;
  --card:      #162033;
  --cyan:      #7AE600;
  --cyan-dim:  #5AB800;
  --cyan-glow: rgba(122,230,0,0.08);
  --white:     #EEF3FF;
  --steel:     #7A8BAA;
  --muted:     #4A5568;
  --danger:    #FF4D6D;
  --warn:      #F6A623;
  --ok:        #2ECC8F;
  --border:    rgba(122,230,0,0.1);
  --border-m:  rgba(122,230,0,0.18);
  --font-d:    'Space Grotesk', sans-serif;
  --font-b:    'Inter', sans-serif;
  --font-m:    'JetBrains Mono', monospace;
  --radius:    6px;
  --max-w:     1140px;
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
  background: var(--navy);
  color: var(--white);
  font-family: var(--font-b);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ── SCROLLBAR ── */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--navy); }
::-webkit-scrollbar-thumb { background: var(--mid); border-radius: 2px; }

/* ── NAV ── */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 200;
  background: rgba(8,12,24,0.9);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 40px;
  height: 64px;
  display: flex; align-items: center; justify-content: space-between;
}
.nav-logo {
  font-family: var(--font-d);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--white);
  text-decoration: none;
  display: flex; align-items: center; gap: 6px;
}
.nav-logo span { color: var(--cyan); }
.nav-logo .dot {
  width: 6px; height: 6px;
  background: var(--cyan);
  border-radius: 50%;
  display: inline-block;
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%,100% { opacity:1; transform:scale(1); }
  50% { opacity:0.4; transform:scale(0.7); }
}
.nav-links {
  display: flex; align-items: center; gap: 6px;
  list-style: none;
}
.nav-links a {
  font-family: var(--font-d);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--steel);
  text-decoration: none;
  padding: 6px 12px;
  border-radius: var(--radius);
  transition: color 0.15s, background 0.15s;
}
.nav-links a:hover { color: var(--white); background: var(--cyan-glow); }
.nav-links a.active { color: var(--cyan); }
.nav-cta {
  font-family: var(--font-d);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 8px 20px;
  border: 1px solid var(--cyan);
  border-radius: var(--radius);
  color: var(--cyan);
  text-decoration: none;
  transition: background 0.15s, color 0.15s;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.nav-cta:hover { background: var(--cyan); color: var(--navy); }

/* Mobile nav toggle */
.nav-hamburger {
  display: none;
  flex-direction: column; gap: 5px;
  cursor: pointer; padding: 4px;
}
.nav-hamburger span {
  display: block; width: 22px; height: 2px;
  background: var(--steel); border-radius: 1px;
  transition: 0.2s;
}

/* ── PAGE WRAPPER ── */
.page-wrap { padding-top: 64px; }

/* ── HERO BASE ── */
.hero {
  min-height: 92vh;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  text-align: center;
  padding: 80px 40px 60px;
  position: relative; overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute; inset: 0; pointer-events: none;
  background:
    radial-gradient(ellipse 70% 55% at 50% -5%, rgba(122,230,0,0.09) 0%, transparent 65%),
    radial-gradient(ellipse 40% 30% at 85% 85%, rgba(122,230,0,0.04) 0%, transparent 55%),
    radial-gradient(ellipse 30% 25% at 15% 75%, rgba(122,230,0,0.03) 0%, transparent 50%);
}
.hero-grid-bg {
  position: absolute; inset: 0; pointer-events: none; opacity: 0.025;
  background-image:
    linear-gradient(var(--cyan) 1px, transparent 1px),
    linear-gradient(90deg, var(--cyan) 1px, transparent 1px);
  background-size: 60px 60px;
}

/* ── TYPOGRAPHY ── */
.eyebrow {
  display: inline-block;
  font-family: var(--font-m);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 22px;
  opacity: 0.9;
}
.eyebrow::before { content: '// '; opacity: 0.5; }

h1.display {
  font-family: var(--font-d);
  font-size: clamp(2.4rem, 4.5vw, 4rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.06;
  max-width: 860px;
  margin: 0 auto 20px;
}
h1.display em { font-style: normal; color: var(--cyan); }

h2.section-h {
  font-family: var(--font-d);
  font-size: clamp(1.7rem, 2.8vw, 2.6rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.1;
  margin-bottom: 14px;
}
h2.section-h em { font-style: normal; color: var(--cyan); }

h3.card-h {
  font-family: var(--font-d);
  font-size: 1.05rem;
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: 10px;
}

.lead {
  font-size: 1.1rem;
  color: var(--steel);
  max-width: 620px;
  margin: 0 auto 14px;
  line-height: 1.72;
}
.lead-vi {
  font-size: 0.92rem;
  color: var(--steel);
  opacity: 0.65;
  font-style: italic;
  margin: 0 auto 40px;
  max-width: 600px;
  line-height: 1.6;
}
.body-text {
  font-size: 0.92rem;
  color: var(--steel);
  line-height: 1.7;
}
.vi-note {
  font-size: 0.8rem;
  color: var(--steel);
  opacity: 0.55;
  font-style: italic;
  margin-top: 6px;
  display: block;
  line-height: 1.5;
}

/* ── BUTTONS ── */
.btn-row { display: flex; gap: 14px; flex-wrap: wrap; justify-content: center; }
.btn-p {
  font-family: var(--font-d);
  font-weight: 600;
  font-size: 0.9rem;
  padding: 13px 30px;
  background: var(--cyan);
  color: var(--navy);
  border: none; border-radius: var(--radius);
  text-decoration: none; cursor: pointer;
  transition: opacity 0.15s, transform 0.12s;
  letter-spacing: 0.02em;
}
.btn-p:hover { opacity: 0.85; transform: translateY(-1px); }
.btn-g {
  font-family: var(--font-d);
  font-weight: 500;
  font-size: 0.9rem;
  padding: 13px 30px;
  background: transparent;
  color: var(--white);
  border: 1px solid var(--border-m);
  border-radius: var(--radius);
  text-decoration: none; cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
}
.btn-g:hover { border-color: var(--cyan); color: var(--cyan); }

/* ── LAYOUT ── */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 40px;
}
.section {
  padding: 88px 0;
}
.section-header {
  margin-bottom: 52px;
}
.sep {
  width: 100%;
  height: 1px;
  background: var(--border);
}

/* ── CARDS / GRIDS ── */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; }
.grid-auto { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1px; }

.card-grid {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.card {
  background: var(--card);
  padding: 36px 32px;
  transition: background 0.2s;
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.card:hover { background: var(--mid); }
.card:last-child, .card:nth-child(3n) { border-right: none; }
.card.grid-2-item:nth-child(even) { border-right: none; }
.card.last-row { border-bottom: none; }

.chip {
  display: inline-block;
  font-family: var(--font-m);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 5px 10px;
  border-radius: 3px;
  margin-bottom: 18px;
}
.chip-cyan { color: var(--cyan); background: rgba(122,230,0,0.08); border: 1px solid rgba(122,230,0,0.2); }
.chip-danger { color: var(--danger); background: rgba(255,77,109,0.08); border: 1px solid rgba(255,77,109,0.2); }
.chip-warn { color: var(--warn); background: rgba(246,166,35,0.08); border: 1px solid rgba(246,166,35,0.2); }
.chip-ok { color: var(--ok); background: rgba(46,204,143,0.08); border: 1px solid rgba(46,204,143,0.2); }
.chip-muted { color: var(--steel); background: rgba(122,139,170,0.08); border: 1px solid rgba(122,139,170,0.2); }

/* Status badges */
.badge {
  font-family: var(--font-m);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: 3px;
  display: inline-block;
}
.badge-pass { color: var(--ok); background: rgba(46,204,143,0.1); border: 1px solid rgba(46,204,143,0.25); }
.badge-review { color: var(--warn); background: rgba(246,166,35,0.1); border: 1px solid rgba(246,166,35,0.25); }
.badge-block { color: var(--danger); background: rgba(255,77,109,0.1); border: 1px solid rgba(255,77,109,0.25); }
.badge-pilot { color: var(--cyan); background: rgba(122,230,0,0.1); border: 1px solid rgba(122,230,0,0.25); }
.badge-research { color: var(--steel); background: rgba(122,139,170,0.1); border: 1px solid rgba(122,139,170,0.2); }

/* ── MONO TERMINAL BLOCK ── */
.mono-block {
  background: var(--slate);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 28px;
  font-family: var(--font-m);
  font-size: 0.78rem;
  color: var(--steel);
  line-height: 1.8;
}
.mono-block .ok { color: var(--ok); }
.mono-block .warn { color: var(--warn); }
.mono-block .danger { color: var(--danger); }
.mono-block .cyan { color: var(--cyan); }
.mono-block .comment { color: var(--muted); }

/* ── STAT BLOCKS ── */
.stat-big {
  font-family: var(--font-d);
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: -0.04em;
  line-height: 1;
  display: block;
  margin-bottom: 6px;
}
.stat-label {
  font-size: 0.82rem;
  color: var(--steel);
  line-height: 1.4;
}

/* ── CTA BAND ── */
.cta-band {
  background: var(--slate);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 72px 0;
  text-align: center;
}

/* ── FOOTER ── */
.footer {
  padding: 48px 0 32px;
  border-top: 1px solid var(--border);
}
.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 40px;
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 40px;
}
.footer-brand .logo {
  font-family: var(--font-d);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--white);
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}
.footer-brand .logo span { color: var(--cyan); }
.footer-brand p {
  font-size: 0.82rem;
  color: var(--steel);
  line-height: 1.6;
  max-width: 240px;
}
.footer-col h4 {
  font-family: var(--font-d);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--steel);
  margin-bottom: 16px;
}
.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.footer-col ul a {
  font-size: 0.85rem;
  color: var(--steel);
  text-decoration: none;
  transition: color 0.15s;
}
.footer-col ul a:hover { color: var(--cyan); }
.footer-bottom {
  max-width: var(--max-w);
  margin: 32px auto 0;
  padding: 24px 40px 0;
  border-top: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 12px;
}
.footer-bottom p {
  font-family: var(--font-m);
  font-size: 0.68rem;
  color: var(--steel);
  opacity: 0.5;
  letter-spacing: 0.04em;
}
.footer-seal {
  font-family: var(--font-m);
  font-size: 0.65rem;
  color: var(--ok);
  opacity: 0.6;
  letter-spacing: 0.04em;
}

/* ── ANIMATIONS ── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}
.anim-1 { animation: fadeUp 0.55s ease both; animation-delay: 0.08s; }
.anim-2 { animation: fadeUp 0.55s ease both; animation-delay: 0.18s; }
.anim-3 { animation: fadeUp 0.55s ease both; animation-delay: 0.28s; }
.anim-4 { animation: fadeUp 0.55s ease both; animation-delay: 0.38s; }
.anim-5 { animation: fadeUp 0.55s ease both; animation-delay: 0.48s; }

.reveal {
  opacity: 0; transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ── RESPONSIVE ── */
@media (max-width: 960px) {
  .nav-links, .nav-cta { display: none; }
  .nav-hamburger { display: flex; }
  .nav-inner { padding: 0 24px; }
  .container { padding: 0 24px; }
  .hero { padding: 60px 24px 48px; }
  .section { padding: 64px 0; }
  .grid-3, .grid-4 { grid-template-columns: 1fr 1fr; }
  .card:nth-child(3n) { border-right: 1px solid var(--border); }
  .card:nth-child(even) { border-right: none; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .footer-bottom { padding: 20px 24px 0; flex-direction: column; align-items: flex-start; }
}
@media (max-width: 640px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .card { border-right: none !important; }
  h1.display { font-size: 2rem; }
  .footer-inner { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}