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

:root {
  --bg: #0f1117;
  --bg-surface: #171922;
  --bg-elevated: #1e2130;
  --fg: #f0f0f5;
  --fg-muted: #8a8fa8;
  --accent: #00d4aa;
  --accent-dim: rgba(0, 212, 170, 0.12);
  --accent-glow: rgba(0, 212, 170, 0.25);
  --border: rgba(255,255,255,0.07);
  --font-display: 'Syne', sans-serif;
  --font-body: 'DM Sans', sans-serif;
  --radius: 10px;
  --max-w: 1100px;
}

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* Nav */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 28px 40px;
}
.nav-brand {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 20px;
  letter-spacing: -0.02em;
  color: var(--fg);
}
.nav-tagline {
  font-size: 13px;
  color: var(--fg-muted);
  letter-spacing: 0.02em;
}

/* Hero */
.hero {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 60px 40px 80px;
}
.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.hero-eyebrow {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 20px;
}
.hero-headline {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(36px, 5vw, 56px);
  line-height: 1.08;
  letter-spacing: -0.03em;
  color: var(--fg);
  margin-bottom: 24px;
}
.highlight {
  color: var(--accent);
}
.hero-lede {
  font-size: 17px;
  color: var(--fg-muted);
  max-width: 420px;
  line-height: 1.65;
}

/* Channel diagram */
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}
.channel-diagram {
  position: relative;
  width: 280px;
  height: 280px;
}
.node {
  position: absolute;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-size: 11px;
  font-weight: 500;
  line-height: 1.3;
  padding: 10px 8px;
  border-radius: var(--radius);
}
.node-center {
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 90px; height: 90px;
  background: var(--accent-dim);
  border: 1.5px solid var(--accent);
  color: var(--accent);
  font-weight: 700;
  z-index: 2;
}
.node-ring {
  width: 72px; height: 64px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  color: var(--fg-muted);
}
.ring-1 { top: 10px; left: 50%; transform: translateX(-50%); }
.ring-2 { top: 20px; right: 10px; }
.ring-3 { bottom: 20px; left: 10px; }
.ring-4 { bottom: 10px; right: 10px; }
.connector-lines {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  z-index: 1;
}

/* Stats */
.stats {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 48px 40px;
}
.stats-grid {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}
.stat-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.stat-value {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 32px;
  letter-spacing: -0.03em;
  color: var(--fg);
}
.stat-label {
  font-size: 12px;
  color: var(--fg-muted);
  line-height: 1.4;
}
.stat-divider {
  width: 1px;
  height: 48px;
  background: var(--border);
}

/* Features */
.features {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 80px 40px;
}
.section-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 28px;
  letter-spacing: -0.02em;
  margin-bottom: 48px;
  color: var(--fg);
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.feature-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: border-color 0.2s;
}
.feature-card:hover { border-color: var(--accent-glow); }
.feature-icon {
  width: 44px; height: 44px;
  background: var(--accent-dim);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}
.feature-card h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  margin-bottom: 10px;
  color: var(--fg);
}
.feature-card p {
  font-size: 14px;
  color: var(--fg-muted);
  line-height: 1.6;
}

/* Channel model */
.channel-section {
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 80px 40px;
}
.channel-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}
.channel-copy h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 28px;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
  color: var(--fg);
}
.channel-copy p {
  font-size: 15px;
  color: var(--fg-muted);
  line-height: 1.7;
  margin-bottom: 16px;
}
.model-step {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
}
.model-step:last-child { border-bottom: none; }
.step-num {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 11px;
  color: var(--accent);
  letter-spacing: 0.05em;
  min-width: 28px;
  padding-top: 3px;
}
.step-body { display: flex; flex-direction: column; gap: 4px; }
.step-body strong {
  font-size: 15px;
  font-weight: 600;
  color: var(--fg);
}
.step-body span { font-size: 13px; color: var(--fg-muted); line-height: 1.5; }

/* Closing */
.closing {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 100px 40px;
  text-align: center;
}
.closing-statement {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 4vw, 40px);
  letter-spacing: -0.03em;
  color: var(--fg-muted);
  line-height: 1.2;
  max-width: 680px;
  margin: 0 auto;
}

/* Footer */
.footer {
  border-top: 1px solid var(--border);
  padding: 40px;
  text-align: center;
}
.footer-brand {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 16px;
  color: var(--fg-muted);
  margin-bottom: 8px;
}
.footer-sub { font-size: 13px; color: var(--fg-muted); opacity: 0.6; }

/* Responsive */
@media (max-width: 768px) {
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { display: none; }
  .channel-inner { grid-template-columns: 1fr; gap: 40px; }
  .features-grid { grid-template-columns: 1fr; }
  .stats-grid { flex-direction: column; align-items: flex-start; }
  .stat-divider { display: none; }
  .nav { padding: 20px; }
  .hero, .features, .closing { padding: 48px 20px; }
  .channel-section { padding: 60px 20px; }
}