:root {
  --bg: #050a14;
  --bg-alt: #0a1220;
  --fg: #e8f4f8;
  --fg-muted: #7a9aaa;
  --accent: #00d4ff;
  --accent-dim: rgba(0, 212, 255, 0.12);
  --amber: #ffb224;
  --amber-dim: rgba(255, 178, 36, 0.12);
  --border: rgba(0, 212, 255, 0.15);
  --border-dim: rgba(0, 212, 255, 0.06);
  --radius: 6px;
  --font-display: 'Syne', sans-serif;
  --font-body: 'IBM Plex Sans', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;
}

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

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* NAV */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--border-dim);
  background: rgba(5, 10, 20, 0.85);
  backdrop-filter: blur(12px);
}
.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 18px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 15px;
  letter-spacing: 0.18em;
  color: var(--accent);
}
.nav-tagline {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-muted);
  letter-spacing: 0.04em;
}

/* HERO */
.hero {
  max-width: 1100px;
  margin: 0 auto;
  padding: 100px 32px 80px;
  position: relative;
}
.hero::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 400px;
  background: radial-gradient(ellipse 70% 50% at 50% -10%, rgba(0, 212, 255, 0.08), transparent);
  pointer-events: none;
}
.hero-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--accent);
  border: 1px solid var(--border);
  padding: 5px 12px;
  border-radius: 2px;
  margin-bottom: 28px;
  background: var(--accent-dim);
}
.hero-headline {
  font-family: var(--font-display);
  font-size: clamp(38px, 5.5vw, 68px);
  font-weight: 800;
  line-height: 1.08;
  color: var(--fg);
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}
.hero-sub {
  font-size: 17px;
  color: var(--fg-muted);
  max-width: 580px;
  line-height: 1.7;
  margin-bottom: 48px;
}
.hero-metrics {
  display: flex;
  align-items: center;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-alt);
  overflow: hidden;
  width: fit-content;
}
.metric {
  padding: 20px 36px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.metric-value {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 500;
  color: var(--accent);
}
.metric-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--fg-muted);
  text-transform: uppercase;
}
.metric-divider {
  width: 1px;
  height: 56px;
  background: var(--border);
}

/* LATTICE */
.lattice {
  max-width: 1100px;
  margin: 0 auto;
  padding: 80px 32px;
  border-top: 1px solid var(--border-dim);
}
.lattice-label, .protocols-label, .domains-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--fg-muted);
  margin-bottom: 20px;
}
.lattice-headline {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 700;
  line-height: 1.15;
  color: var(--fg);
  margin-bottom: 20px;
}
.lattice-body {
  font-size: 16px;
  color: var(--fg-muted);
  max-width: 660px;
  line-height: 1.7;
  margin-bottom: 48px;
}
.lattice-diagram {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  align-items: start;
}
.lattice-col {
  background: var(--bg-alt);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius);
  padding: 28px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}
.lattice-col-reverse {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.lattice-node {
  width: 100%;
  padding: 14px 18px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.lattice-node.active { border-color: var(--accent); background: var(--accent-dim); }
.node-label { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.08em; color: var(--fg-muted); text-transform: uppercase; }
.node-val { font-family: var(--font-mono); font-size: 13px; color: var(--fg); font-weight: 500; }
.lattice-arrow {
  width: 1px;
  height: 20px;
  background: var(--border);
}
.lattice-mode {
  padding: 18px 20px;
  background: var(--amber-dim);
  border: 1px solid rgba(255, 178, 36, 0.2);
  border-radius: 4px;
}
.mode-header { font-family: var(--font-mono); font-size: 11px; font-weight: 500; color: var(--amber); margin-bottom: 8px; letter-spacing: 0.04em; }
.mode-desc { font-size: 13px; color: var(--fg-muted); line-height: 1.6; }

/* PROTOCOLS */
.protocols {
  max-width: 1100px;
  margin: 0 auto;
  padding: 80px 32px;
  border-top: 1px solid var(--border-dim);
}
.protocols-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.protocol-card {
  padding: 32px;
  background: var(--bg-alt);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius);
  transition: border-color 0.2s;
}
.protocol-card:hover { border-color: var(--border); }
.protocol-icon { margin-bottom: 20px; }
.protocol-card h3 {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 600;
  color: var(--fg);
  margin-bottom: 10px;
}
.protocol-card p { font-size: 14px; color: var(--fg-muted); line-height: 1.7; }

/* DOMAINS */
.domains {
  max-width: 1100px;
  margin: 0 auto;
  padding: 80px 32px;
  border-top: 1px solid var(--border-dim);
}
.domains-headline {
  font-family: var(--font-display);
  font-size: clamp(26px, 3.5vw, 38px);
  font-weight: 700;
  color: var(--fg);
  margin-bottom: 48px;
  line-height: 1.2;
}
.domains-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.domain-item {
  padding: 28px;
  border: 1px solid var(--border-dim);
  border-radius: var(--radius);
  background: var(--bg-alt);
}
.domain-icon { margin-bottom: 16px; }
.domain-item h4 {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 600;
  color: var(--fg);
  margin-bottom: 10px;
}
.domain-item p { font-size: 13px; color: var(--fg-muted); line-height: 1.65; }

/* CLOSING */
.closing {
  max-width: 1100px;
  margin: 0 auto;
  padding: 80px 32px;
  border-top: 1px solid var(--border-dim);
}
.closing-inner { max-width: 700px; }
.closing-headline {
  font-family: var(--font-display);
  font-size: clamp(26px, 3.5vw, 38px);
  font-weight: 700;
  line-height: 1.2;
  color: var(--fg);
  margin-bottom: 20px;
}
.closing-body { font-size: 16px; color: var(--fg-muted); line-height: 1.7; margin-bottom: 32px; }
.closing-status {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent);
  padding: 8px 16px;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: var(--accent-dim);
}
.status-dot {
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

/* FOOTER */
.footer {
  border-top: 1px solid var(--border-dim);
  padding: 32px;
}
.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.footer-logo {
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.15em;
  color: var(--fg-muted);
  display: block;
  margin-bottom: 4px;
}
.footer-sub { font-family: var(--font-mono); font-size: 10px; color: var(--fg-muted); }
.footer-meta { font-family: var(--font-mono); font-size: 10px; color: var(--fg-muted); letter-spacing: 0.04em; }

/* RESPONSIVE */
@media (max-width: 768px) {
  .hero { padding: 64px 20px 56px; }
  .hero-metrics { flex-direction: column; width: 100%; }
  .metric { padding: 16px 20px; border-bottom: 1px solid var(--border-dim); }
  .metric:last-child { border-bottom: none; }
  .metric-divider { display: none; }
  .lattice-diagram { grid-template-columns: 1fr; }
  .protocols-grid { grid-template-columns: 1fr; }
  .domains-grid { grid-template-columns: 1fr; }
  .closing, .protocols, .domains, .lattice { padding: 56px 20px; }
  .footer-inner { flex-direction: column; gap: 16px; text-align: center; }
}