:root {
  --bg: #05060a;
  --text: #eef0f7;
  --muted: #8b90a3;
  --line: rgba(255, 255, 255, .08);
  --glass: rgba(255, 255, 255, .03);
  --violet: #a78bfa;
  --cyan: #22d3ee;
  --lime: #a3e635;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Space Grotesk", system-ui, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
.mono { font-family: "JetBrains Mono", ui-monospace, monospace; }
.wrap { width: min(1180px, 100% - 32px); margin-inline: auto; }
.dim { color: var(--muted); }
.grad {
  background: linear-gradient(100deg, var(--violet), var(--cyan) 55%, var(--lime));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.kicker { font-size: .8rem; color: var(--cyan); letter-spacing: .04em; margin: 0 0 20px; }
h1, h2, h3 { margin: 0; font-weight: 700; letter-spacing: -.035em; line-height: 1.02; }

/* Grain */
.grain {
  position: fixed; inset: 0; z-index: 100; pointer-events: none; opacity: .06;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* Nav */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  background: rgba(5, 6, 10, .55);
  border-bottom: 1px solid var(--line);
}
.nav-inner { height: 64px; display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.2rem; letter-spacing: -.02em; }
.mark {
  width: 22px; height: 22px; border-radius: 50%;
  background: conic-gradient(from 0deg, var(--violet), var(--cyan), var(--lime), var(--violet));
  -webkit-mask: radial-gradient(circle, transparent 5px, #000 6px);
          mask: radial-gradient(circle, transparent 5px, #000 6px);
  animation: spin 6s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.chip {
  display: inline-flex; align-items: center; gap: 8px; white-space: nowrap;
  font-family: "JetBrains Mono", monospace; font-size: .75rem; color: var(--muted);
  border: 1px solid var(--line); border-radius: 999px; padding: 6px 12px; background: var(--glass);
}
.pulse { width: 7px; height: 7px; border-radius: 50%; background: var(--lime); box-shadow: 0 0 12px var(--lime); animation: blink 1.8s ease-in-out infinite; }
@keyframes blink { 50% { opacity: .3; } }

/* Hero */
.hero { position: relative; min-height: 100vh; min-height: 100svh; display: flex; align-items: center; overflow: hidden; }
.hero::before {
  content: ""; position: absolute; inset: -20%; z-index: 0;
  background:
    radial-gradient(40% 40% at 75% 45%, rgba(167, 139, 250, .22), transparent 70%),
    radial-gradient(35% 35% at 85% 70%, rgba(34, 211, 238, .16), transparent 70%),
    radial-gradient(30% 30% at 20% 90%, rgba(163, 230, 53, .07), transparent 70%);
}
#neural { position: absolute; inset: 0; width: 100%; height: 100%; z-index: 1; }
.hero-inner { position: relative; z-index: 2; padding: 120px 0 80px; }
.hero h1 { font-size: clamp(3rem, 9vw, 7.5rem); max-width: 11ch; }
.lead { font-size: clamp(1.05rem, 1.6vw, 1.3rem); color: var(--muted); max-width: 46ch; margin: 28px 0 40px; }
.hero-meta { display: flex; flex-wrap: wrap; gap: 10px 28px; font-size: .8rem; color: var(--muted); }
.hero-meta b { color: var(--text); font-weight: 500; margin-right: 6px; }
.scroll-hint {
  position: absolute; bottom: 24px; left: 50%; transform: translateX(-50%); z-index: 2;
  font-size: .72rem; color: var(--muted); animation: bob 2.4s ease-in-out infinite;
}
@keyframes bob { 50% { transform: translate(-50%, 6px); } }

/* Marquee */
.marquee { border-block: 1px solid var(--line); overflow: hidden; padding: 18px 0; background: rgba(255,255,255,.015); }
.track { display: flex; gap: 28px; width: max-content; animation: slide 40s linear infinite; font-size: .95rem; text-transform: uppercase; letter-spacing: .08em; }
.track span { color: var(--text); }
.track i { font-style: normal; color: var(--violet); }
@keyframes slide { to { transform: translateX(-50%); } }

/* Sections */
.section { padding: clamp(96px, 14vw, 160px) 0 0; }
.section-head { margin-bottom: 48px; }
.section-head h2 { font-size: clamp(2.4rem, 6vw, 4.5rem); }

.glass {
  position: relative; background: var(--glass); border: 1px solid var(--line); border-radius: 20px;
  transition: border-color .3s, transform .3s, background .3s;
}
.glass:hover { border-color: rgba(167, 139, 250, .35); background: rgba(255, 255, 255, .045); transform: translateY(-3px); }

.pillars { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.pillars article { padding: 32px; min-height: 280px; display: flex; flex-direction: column; }
.num { font-size: .8rem; color: var(--muted); }
.pillars h3 { font-size: 1.7rem; margin: 64px 0 12px; }
.pillars p { color: var(--muted); margin: 0; }

.lab { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.lab li { padding: 28px; }
.lab-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; }
.tag { font-size: .72rem; color: var(--cyan); border: 1px solid rgba(34, 211, 238, .3); border-radius: 999px; padding: 3px 10px; }
.pct { font-size: .8rem; color: var(--muted); }
.lab h3 { font-size: 1.35rem; letter-spacing: -.02em; line-height: 1.25; margin-bottom: 24px; }
.bar { height: 4px; border-radius: 4px; background: var(--line); overflow: hidden; }
.bar i {
  display: block; height: 100%; width: var(--p); border-radius: inherit;
  background: linear-gradient(90deg, var(--violet), var(--cyan), var(--lime));
  transform-origin: left; transform: scaleX(0); transition: transform 1.4s cubic-bezier(.2, .8, .2, 1);
}
.in .bar i { transform: scaleX(1); }

/* Closing */
.closing { padding: clamp(120px, 16vw, 200px) 0; text-align: center; }
.closing .kicker { margin-bottom: 24px; }
.big { font-size: clamp(2.6rem, 8vw, 6.5rem); font-weight: 700; letter-spacing: -.04em; line-height: 1; margin: 0 0 48px; }
.terminal {
  display: inline-flex; align-items: center; gap: 8px; max-width: 100%;
  font-size: clamp(.78rem, 2.4vw, .95rem); color: var(--muted);
  border: 1px solid var(--line); border-radius: 12px; padding: 14px 20px; background: var(--glass);
  margin: 0; text-align: left;
}
.prompt { color: var(--lime); }
#typed { color: var(--text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.caret { width: 8px; height: 1.1em; background: var(--cyan); animation: blink 1s steps(1) infinite; flex: none; }

/* Footer */
.footer {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px;
  padding: 28px 0 36px; border-top: 1px solid var(--line); font-size: .75rem; color: var(--muted);
}

/* Reveal */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .9s ease, transform .9s cubic-bezier(.2, .8, .2, 1); }
.reveal.in { opacity: 1; transform: none; }

@media (max-width: 860px) {
  .pillars, .lab { grid-template-columns: 1fr; }
  .pillars article { min-height: 0; }
  .pillars h3 { margin-top: 36px; }
  #neural { opacity: .5; }
}
@media (max-width: 480px) {
  .chip { font-size: .68rem; padding: 5px 10px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
  .bar i { transform: none; }
}

.note { font-size: .75rem; color: var(--muted); margin: 16px 0 0; }

/* v3: landing sobria */
.hero h1 { max-width: 14ch; font-size: clamp(2.8rem, 7vw, 6.2rem); }
.slogan {
  margin: 32px 0 0; max-width: 32ch;
  font-size: clamp(1.05rem, 1.8vw, 1.35rem); color: var(--muted); font-weight: 400; letter-spacing: -.01em;
}
.keys { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); }
.keys article { padding: 40px 32px 0 0; }
.keys article + article { padding-left: 32px; border-left: 1px solid var(--line); }
.keys h2 { font-size: clamp(1.8rem, 3.6vw, 2.8rem); margin: 28px 0 12px; }
.keys p { color: var(--muted); margin: 0; }
@media (max-width: 860px) {
  .keys { grid-template-columns: 1fr; }
  .keys article, .keys article + article { padding: 32px 0; border-left: 0; border-bottom: 1px solid var(--line); }
  .keys h2 { margin-top: 16px; }
}