:root {
  --bg: #F8F5F0;
  --ink: #1A1A1A;
  --ink-2: #6B6B6B;
  --accent: #D97706;
  --accent-light: #FEF3C7;
  --border: #E5E0D8;
  --card: #FFFFFF;
  --t1: #065F46;
  --t1-bg: #ECFDF5;
  --t2: #92400E;
  --t2-bg: #FEF3C7;
  --step-num: #D97706;
  --muted: #9CA3AF;
}

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

body {
  background: var(--bg);
  color: var(--ink);
  font-family: 'DM Sans', system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* Navigation */
.nav {
  padding: 20px 40px;
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
}
.nav-logo {
  font-weight: 700;
  font-size: 18px;
  letter-spacing: -0.02em;
  color: var(--ink);
}

/* Hero */
.hero {
  padding: 80px 40px 60px;
  border-bottom: 1px solid var(--border);
}
.hero-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.hero-headline {
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--ink);
  margin-bottom: 20px;
}
.hero-sub {
  font-size: 17px;
  color: var(--ink-2);
  line-height: 1.7;
}

/* Flow card */
.flow-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
}
.flow-step {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 16px 0;
}
.flow-step + .flow-step {
  border-top: 1px solid var(--border);
}
.step-num {
  font-family: 'DM Mono', monospace;
  font-size: 11px;
  font-weight: 500;
  color: var(--accent);
  background: var(--accent-light);
  border-radius: 4px;
  padding: 2px 6px;
  flex-shrink: 0;
  margin-top: 2px;
}
.step-body {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}
.step-icon {
  color: var(--ink-2);
  flex-shrink: 0;
  margin-top: 2px;
}
.step-label {
  font-weight: 600;
  font-size: 14px;
  color: var(--ink);
  margin-bottom: 4px;
}
.step-desc {
  font-size: 13px;
  color: var(--ink-2);
  line-height: 1.5;
}
.flow-arrow {
  text-align: center;
  color: var(--muted);
  padding: 4px 0;
}

/* Demo section */
.demo {
  padding: 80px 40px;
  border-bottom: 1px solid var(--border);
}
.demo-inner {
  max-width: 1200px;
  margin: 0 auto;
}
.demo-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink-2);
  margin-bottom: 16px;
}
.demo-output {
  display: flex;
  flex-direction: column;
  gap: 0;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
}
.tier {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 20px 28px;
}
.tier + .tier {
  border-top: 1px solid var(--border);
}
.tier-badge {
  font-family: 'DM Mono', monospace;
  font-size: 12px;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 6px;
  flex-shrink: 0;
  width: 36px;
  text-align: center;
}
.t1 .tier-badge { background: var(--t1-bg); color: var(--t1); }
.t2 .tier-badge { background: var(--t2-bg); color: var(--t2); }
.tier-info { flex: 1; }
.tier-company { font-weight: 700; font-size: 15px; color: var(--ink); }
.tier-target { font-size: 13px; color: var(--ink-2); margin-top: 2px; }
.tier-path { font-size: 12px; color: var(--ink-2); margin-top: 4px; font-family: 'DM Mono', monospace; }
.tier-score {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}
.score-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #059669;
}
.score-dot.score-orange { background: var(--accent); }
.score-num {
  font-family: 'DM Mono', monospace;
  font-size: 13px;
  font-weight: 500;
  color: var(--ink);
}
.demo-footnote {
  margin-top: 16px;
  font-size: 13px;
  color: var(--ink-2);
  font-style: italic;
}

/* Network section */
.network {
  padding: 80px 40px;
  border-bottom: 1px solid var(--border);
}
.network-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.section-heading {
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin-bottom: 16px;
}
.section-body {
  font-size: 16px;
  color: var(--ink-2);
  line-height: 1.7;
}

/* Network visual */
.network-visual {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 280px;
  position: relative;
}
.net-node {
  text-align: center;
}
.net-you {
  font-weight: 700;
  font-size: 14px;
  color: var(--ink);
}
.net-count {
  font-size: 11px;
  color: var(--ink-2);
  font-family: 'DM Mono', monospace;
  margin-top: 2px;
}
.net-orbit {
  position: relative;
  width: 220px;
  height: 220px;
}
.orbit-ring {
  position: absolute;
  width: 180px;
  height: 180px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  border: 1px dashed var(--border);
  border-radius: 50%;
}
.orbit-2 { width: 140px; height: 140px; }
.orbit-3 { width: 100px; height: 100px; }
.friend {
  position: absolute;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 14px;
  box-shadow: 0 1px 6px rgba(0,0,0,0.06);
}
.friend-1 { top: 0; left: 50%; transform: translateX(-50%); }
.friend-2 { bottom: 20px; left: 0; }
.friend-3 { bottom: 20px; right: 0; }
.net-name { font-weight: 600; font-size: 12px; color: var(--ink); }
.net-sub { font-size: 11px; color: var(--accent); font-family: 'DM Mono', monospace; margin-top: 2px; }

/* Privacy section */
.privacy {
  padding: 80px 40px;
  border-bottom: 1px solid var(--border);
}
.privacy-inner {
  max-width: 1200px;
  margin: 0 auto;
}
.privacy .section-heading {
  text-align: center;
  margin-bottom: 48px;
}
.privacy-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.privacy-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px;
}
.privacy-icon {
  width: 48px;
  height: 48px;
  background: var(--accent-light);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  margin-bottom: 20px;
}
.privacy-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 10px;
}
.privacy-desc {
  font-size: 14px;
  color: var(--ink-2);
  line-height: 1.6;
}

/* Closing */
.closing {
  padding: 100px 40px;
  text-align: center;
  border-bottom: 1px solid var(--border);
}
.closing-inner {
  max-width: 800px;
  margin: 0 auto;
}
.closing-stat {
  font-family: 'DM Mono', monospace;
  font-size: 14px;
  color: var(--accent);
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}
.closing-headline {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--ink);
  line-height: 1.15;
}

/* Footer */
.footer {
  padding: 40px;
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 24px;
}
.footer-brand {
  font-weight: 700;
  font-size: 15px;
  color: var(--ink);
}
.footer-tagline {
  font-size: 14px;
  color: var(--ink-2);
  flex: 1;
}
.footer-links {
  display: flex;
  gap: 16px;
}
.footer-link {
  font-size: 13px;
  color: var(--ink-2);
  text-decoration: none;
  transition: color 0.15s;
}
.footer-link:hover { color: var(--ink); }

/* Responsive */
@media (max-width: 768px) {
  .hero-inner,
  .network-inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .privacy-grid {
    grid-template-columns: 1fr;
  }
  .hero { padding: 60px 24px 40px; }
  .demo, .network, .privacy, .closing { padding: 60px 24px; }
  .nav { padding: 16px 24px; }
  .footer-inner { flex-wrap: wrap; }
  .footer-tagline { width: 100%; flex: none; }
  .tier { flex-wrap: wrap; }
  .tier-score { margin-top: 8px; }
}