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

:root {
  --bg: #08090d;
  --surface: #0e1117;
  --surface-2: #141820;
  --border: #1e2636;
  --green: #00ff88;
  --green-dim: #00cc6a;
  --text: #e8edf5;
  --text-muted: #6b7a94;
  --text-dim: #3d4a5c;
  --font-head: 'Space Grotesk', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-head);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* NAV */
.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 48px;
  border-bottom: 1px solid var(--border);
}

.nav-logo { display: flex; align-items: center; gap: 10px; }
.logo-mark { color: var(--green); font-size: 1.1rem; }
.logo-name { font-family: var(--font-head); font-weight: 700; font-size: 1.1rem; letter-spacing: -0.01em; }

.nav-status { display: flex; align-items: center; gap: 8px; }
.status-dot {
  width: 8px; height: 8px;
  background: var(--green);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--green);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}
.status-text { font-family: var(--font-mono); font-size: 0.75rem; color: var(--text-muted); letter-spacing: 0.05em; }

/* HERO */
.hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  padding: 80px 48px 100px;
  border-bottom: 1px solid var(--border);
}

.hero-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--green);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 24px;
}

.hero-title {
  font-size: clamp(2.4rem, 5vw, 4rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
  color: var(--text);
}

.hero-lede {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 420px;
  line-height: 1.7;
  margin-bottom: 36px;
}

.hero-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 5px 10px;
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text-muted);
  letter-spacing: 0.04em;
}

/* SIGNAL FEED */
.signal-feed {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.feed-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  background: var(--surface-2);
}

.feed-title { color: var(--text-muted); font-size: 0.7rem; letter-spacing: 0.08em; }
.feed-badge {
  background: var(--green);
  color: var(--bg);
  padding: 2px 8px;
  border-radius: 3px;
  font-weight: 600;
  font-size: 0.65rem;
}

.feed-row {
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  gap: 12px;
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
  align-items: center;
}

.feed-pair { color: var(--text); font-weight: 500; }
.feed-action { color: var(--text-muted); font-size: 0.68rem; }

.feed-signal {
  color: var(--green);
  font-weight: 600;
  text-align: right;
}
.feed-signal.green { color: var(--green); }

.feed-footer {
  display: flex;
  justify-content: space-between;
  padding: 10px 16px;
  background: var(--surface-2);
  color: var(--text-dim);
  font-size: 0.68rem;
}

/* ARCHITECTURE */
.architecture {
  padding: 80px 48px;
  border-bottom: 1px solid var(--border);
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--green);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 20px;
}

.section-title {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin-bottom: 60px;
}

.arch-diagram {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 0;
  align-items: center;
}

.arch-node {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 28px;
}

.arch-node.brain { border-color: var(--green); border-left: 3px solid var(--green); }

.node-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--green);
  margin-bottom: 6px;
}

.node-sub {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.node-desc { font-size: 0.82rem; color: var(--text-muted); line-height: 1.6; }

.arch-arrow {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 0 40px;
}

.arrow-line { font-size: 2rem; color: var(--text-dim); }
.arrow-label { font-family: var(--font-mono); font-size: 0.65rem; color: var(--text-dim); text-align: center; letter-spacing: 0.05em; }

/* FEATURES */
.features {
  padding: 80px 48px;
  border-bottom: 1px solid var(--border);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

.feature-card {
  background: var(--surface);
  padding: 32px;
}

.feature-icon { font-size: 1.4rem; color: var(--green); margin-bottom: 16px; }
.feature-title { font-size: 0.95rem; font-weight: 600; margin-bottom: 10px; }
.feature-body { font-size: 0.82rem; color: var(--text-muted); line-height: 1.7; }

/* STACK */
.stack { padding: 80px 48px; border-bottom: 1px solid var(--border); }
.stack-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 0;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

.stack-item {
  background: var(--surface);
  padding: 24px 20px;
  border-right: 1px solid var(--border);
}

.stack-item:last-child { border-right: none; }

.stack-layer { font-family: var(--font-mono); font-size: 0.65rem; color: var(--text-dim); letter-spacing: 0.08em; margin-bottom: 8px; }
.stack-tech { font-size: 0.9rem; font-weight: 600; margin-bottom: 6px; }
.stack-desc { font-size: 0.72rem; color: var(--text-muted); line-height: 1.5; }

/* CLOSING */
.closing {
  padding: 100px 48px;
  background: linear-gradient(180deg, var(--bg) 0%, #05070a 100%);
}

.closing-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--green);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 24px;
}

.closing-title {
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 28px;
}

.closing-body {
  font-size: 1rem;
  color: var(--text-muted);
  max-width: 600px;
  line-height: 1.8;
}

/* FOOTER */
.footer {
  padding: 40px 48px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  text-align: center;
}

.footer-logo { display: flex; align-items: center; gap: 8px; }
.footer-tagline { font-family: var(--font-mono); font-size: 0.8rem; color: var(--text-muted); }
.footer-meta { font-family: var(--font-mono); font-size: 0.68rem; color: var(--text-dim); }

/* RESPONSIVE */
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; gap: 48px; padding: 48px 24px 60px; }
  .arch-diagram { grid-template-columns: 1fr; gap: 16px; }
  .arch-arrow { flex-direction: row; padding: 0; }
  .features-grid { grid-template-columns: 1fr; }
  .stack-grid { grid-template-columns: repeat(2, 1fr); }
  .stack-item { border-bottom: 1px solid var(--border); }
  .nav { padding: 16px 24px; }
  .architecture, .features, .stack, .closing { padding: 48px 24px; }
  .footer { padding: 32px 24px; }
}

@media (max-width: 600px) {
  .stack-grid { grid-template-columns: 1fr; }
}