:root {
  --bg: #0c0c0e;
  --bg-surface: #131316;
  --bg-card: #19191f;
  --fg: #f5f0e8;
  --fg-muted: #a09a92;
  --fg-subtle: #5a5550;
  --accent: #00c8e0;
  --accent-dim: rgba(0, 200, 224, 0.12);
  --border: rgba(245, 240, 232, 0.08);
  --font-serif: 'Instrument Serif', Georgia, serif;
  --font-sans: 'Space Grotesk', system-ui, sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* NAV */
.nav {
  padding: 20px 48px;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 100;
}
.nav-inner {
  display: flex;
  align-items: center;
  gap: 16px;
  max-width: 1200px;
  margin: 0 auto;
}
.nav-logo {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: -0.5px;
  color: var(--fg);
}
.nav-tag {
  font-size: 12px;
  color: var(--fg-muted);
  font-weight: 400;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

/* HERO */
.hero {
  max-width: 1200px;
  margin: 0 auto;
  padding: 80px 48px 60px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.hero-eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--fg-muted);
  margin-bottom: 24px;
  font-weight: 500;
}
.eyebrow-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  display: inline-block;
  animation: pulse 2.5s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}
.hero-headline {
  font-family: var(--font-serif);
  font-size: clamp(38px, 4.5vw, 64px);
  line-height: 1.1;
  letter-spacing: -1px;
  color: var(--fg);
  margin-bottom: 28px;
  font-weight: 400;
}
.hero-headline em {
  font-style: italic;
  color: var(--accent);
}
.hero-lede {
  font-size: 17px;
  line-height: 1.65;
  color: var(--fg-muted);
  max-width: 480px;
  margin-bottom: 40px;
}
.hero-stats {
  display: flex;
  align-items: center;
  gap: 24px;
}
.stat { display: flex; flex-direction: column; }
.stat-value {
  font-size: 28px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.5px;
  line-height: 1;
}
.stat-label {
  font-size: 12px;
  color: var(--fg-muted);
  margin-top: 4px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.stat-sep {
  width: 1px;
  height: 32px;
  background: var(--border);
}
.hero-visual {
  display: flex;
  justify-content: flex-end;
}
.graph-illustration {
  width: 100%;
  max-width: 420px;
  opacity: 0.9;
}

/* FEATURES */
.features {
  max-width: 1200px;
  margin: 0 auto;
  padding: 80px 48px;
}
.features-header {
  text-align: center;
  margin-bottom: 64px;
}
.features-header h2 {
  font-family: var(--font-serif);
  font-size: 42px;
  font-weight: 400;
  letter-spacing: -0.5px;
  margin-bottom: 16px;
}
.features-header p {
  font-size: 18px;
  color: var(--fg-muted);
}
.features-header em { font-style: italic; color: var(--accent); }
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
}
.feature-card {
  background: var(--bg-surface);
  padding: 40px 36px;
  transition: background 0.2s;
}
.feature-card:hover { background: var(--bg-card); }
.feature-icon {
  width: 44px;
  height: 44px;
  border: 1px solid var(--border);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  margin-bottom: 24px;
}
.feature-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 14px;
  letter-spacing: -0.3px;
}
.feature-card p {
  font-size: 15px;
  color: var(--fg-muted);
  line-height: 1.65;
}

/* ENTITY PREVIEW */
.entity-preview {
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 80px 48px;
}
.entity-preview-inner {
  max-width: 680px;
  margin: 0 auto;
}
.entity-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 16px;
}
.entity-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
}
.entity-card-header {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 24px;
  border-bottom: 1px solid var(--border);
}
.entity-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, #1a3a4a, #0c2030);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
  color: var(--accent);
  flex-shrink: 0;
  border: 1px solid var(--accent);
}
.entity-info { flex: 1; }
.entity-name {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.2px;
}
.entity-role {
  font-size: 13px;
  color: var(--fg-muted);
  margin-top: 3px;
}
.entity-strength {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 6px;
}
.strength-label {
  font-size: 11px;
  color: var(--fg-subtle);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.strength-bar {
  width: 80px;
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  overflow: hidden;
}
.strength-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 2px;
}
.entity-card-body { padding: 24px; }
.entity-section { margin-bottom: 24px; }
.entity-section:last-child { margin-bottom: 0; }
.section-label {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--fg-subtle);
  font-weight: 600;
  margin-bottom: 10px;
}
.path-row {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  font-weight: 500;
  margin-bottom: 6px;
}
.path-you { color: var(--fg-muted); }
.path-arrow { color: var(--accent); }
.path-target { color: var(--fg); }
.path-evidence {
  font-size: 13px;
  color: var(--fg-subtle);
  margin-left: 2px;
}
.context-items { display: flex; flex-direction: column; gap: 6px; }
.context-item {
  font-size: 14px;
  color: var(--fg-muted);
  padding-left: 12px;
  border-left: 2px solid var(--border);
}
.source-tags { display: flex; gap: 8px; flex-wrap: wrap; }
.source-tag {
  font-size: 11px;
  font-weight: 500;
  padding: 4px 10px;
  border: 1px solid var(--border);
  border-radius: 20px;
  color: var(--fg-muted);
}
.entity-caption {
  text-align: center;
  font-size: 13px;
  color: var(--fg-subtle);
  margin-top: 20px;
  font-style: italic;
}

/* HOW IT WORKS */
.how-it-works {
  max-width: 1200px;
  margin: 0 auto;
  padding: 80px 48px;
}
.how-it-works h2 {
  font-family: var(--font-serif);
  font-size: 36px;
  font-weight: 400;
  letter-spacing: -0.5px;
  margin-bottom: 56px;
  text-align: center;
}
.steps {
  display: flex;
  align-items: flex-start;
  gap: 0;
  justify-content: center;
}
.step {
  max-width: 280px;
}
.step-number {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1.5px;
  color: var(--accent);
  margin-bottom: 16px;
}
.step h3 {
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.3px;
  margin-bottom: 12px;
}
.step p {
  font-size: 14px;
  color: var(--fg-muted);
  line-height: 1.65;
}
.step-connector {
  width: 80px;
  height: 1px;
  background: linear-gradient(to right, var(--border), var(--accent), var(--border));
  margin: 28px 24px 0;
  flex-shrink: 0;
}
.stack-note {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 56px;
  justify-content: center;
  flex-wrap: wrap;
}
.stack-label {
  font-size: 12px;
  color: var(--fg-subtle);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 600;
}
.stack-icons {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.stack-icon {
  font-size: 12px;
  color: var(--fg-muted);
  padding: 5px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-weight: 500;
}

/* CLOSING */
.closing {
  padding: 100px 48px 120px;
  text-align: center;
  background: linear-gradient(to bottom, var(--bg), var(--bg-surface));
  border-top: 1px solid var(--border);
}
.closing-inner { max-width: 760px; margin: 0 auto; }
.closing h2 {
  font-family: var(--font-serif);
  font-size: clamp(32px, 4vw, 52px);
  font-weight: 400;
  letter-spacing: -1px;
  line-height: 1.15;
  margin-bottom: 28px;
}
.closing-sub {
  font-size: 17px;
  color: var(--fg-muted);
  line-height: 1.7;
  max-width: 600px;
  margin: 0 auto 40px;
}
.closing-tagline {
  font-family: var(--font-serif);
  font-size: 22px;
  font-style: italic;
  color: var(--accent);
  letter-spacing: -0.3px;
}

/* FOOTER */
.footer {
  border-top: 1px solid var(--border);
  padding: 28px 48px;
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.footer-brand { display: flex; align-items: center; gap: 12px; }
.footer-logo { font-weight: 700; font-size: 15px; }
.footer-tagline { font-size: 13px; color: var(--fg-muted); }
.footer-meta { font-size: 12px; color: var(--fg-subtle); }

/* RESPONSIVE */
@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 48px;
    padding: 48px 24px;
  }
  .hero-visual { justify-content: center; }
  .graph-illustration { max-width: 340px; }
  .features { padding: 60px 24px; }
  .feature-grid { grid-template-columns: 1fr; }
  .entity-preview { padding: 60px 24px; }
  .how-it-works { padding: 60px 24px; }
  .steps { flex-direction: column; align-items: center; gap: 40px; }
  .step-connector { width: 1px; height: 40px; margin: 0; background: var(--border); }
  .closing { padding: 60px 24px 80px; }
  .footer { padding: 20px 24px; }
  .footer-inner { flex-direction: column; gap: 8px; text-align: center; }
}
@media (max-width: 500px) {
  .nav { padding: 16px 20px; }
  .hero-stats { flex-wrap: wrap; gap: 16px; }
  .stat-sep { display: none; }
}