:root {
  --bg: #0e0e0e;
  --surface: #171717;
  --surface-2: #1f1f1f;
  --accent: #f59e0b;
  --accent-dim: #d97706;
  --text: #f5f5f5;
  --text-muted: #a3a3a3;
  --text-dim: #525252;
  --border: #2a2a2a;
  --font-display: 'Syne', system-ui, sans-serif;
  --font-body: 'DM Sans', system-ui, sans-serif;
}

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

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

/* NAV */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(14,14,14,0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 0 40px;
}
.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  color: var(--text);
}
.nav-tagline {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

/* HERO */
.hero {
  padding: 100px 40px 80px;
  max-width: 1100px;
  margin: 0 auto;
}
.hero-eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.8125rem;
  color: var(--accent);
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 32px;
}
.eyebrow-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  display: inline-block;
  flex-shrink: 0;
}
.hero-headline {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.75rem, 6vw, 5rem);
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--text);
  margin-bottom: 32px;
  max-width: 700px;
}
.hero-body {
  font-size: 1.125rem;
  color: var(--text-muted);
  max-width: 560px;
  line-height: 1.7;
  margin-bottom: 64px;
}
.hero-stats {
  display: flex;
  align-items: center;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  background: var(--surface);
}
.stat {
  flex: 1;
  padding: 28px 32px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.stat-number {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 2rem;
  color: var(--accent);
  letter-spacing: -0.03em;
}
.stat-label {
  font-size: 0.8125rem;
  color: var(--text-muted);
  line-height: 1.4;
}
.stat-divider {
  width: 1px;
  background: var(--border);
  align-self: stretch;
}

/* HOW */
.how {
  padding: 80px 40px;
  max-width: 1100px;
  margin: 0 auto;
  border-top: 1px solid var(--border);
}
.how-header {
  margin-bottom: 56px;
}
.section-eyebrow {
  display: block;
  font-size: 0.75rem;
  color: var(--accent);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 12px;
}
.how-header h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  letter-spacing: -0.02em;
  max-width: 500px;
}
.how-steps {
  display: flex;
  flex-direction: column;
  gap: 0;
}
.step {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 0;
  border-bottom: 1px solid var(--border);
  padding: 32px 0;
}
.step:first-child { border-top: 1px solid var(--border); }
.step-number {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.8125rem;
  color: var(--accent);
  padding-top: 4px;
}
.step-content h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.0625rem;
  margin-bottom: 8px;
}
.step-content p {
  font-size: 0.9375rem;
  color: var(--text-muted);
  max-width: 520px;
}

/* DATAFLOW */
.dataflow {
  padding: 80px 40px;
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.dataflow-grid {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}
.dataflow-text h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}
.dataflow-text p {
  color: var(--text-muted);
  font-size: 0.9375rem;
  margin-bottom: 16px;
  line-height: 1.7;
}
.dataflow-points {
  list-style: none;
  margin-top: 28px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.dataflow-points li {
  font-size: 0.9375rem;
  color: var(--text-muted);
  padding-left: 20px;
  position: relative;
}
.dataflow-points li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--accent);
}
.dataflow-points strong {
  color: var(--text);
}

/* Example column */
.dataflow-example {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.review-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px 24px;
}
.review-stars { margin-bottom: 12px; }
.star { font-size: 1rem; }
.star.filled { color: var(--accent); }
.star.empty { color: var(--text-dim); }
.review-text {
  font-size: 0.875rem;
  font-style: italic;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 12px;
}
.review-source {
  font-size: 0.75rem;
  color: var(--text-dim);
}
.arrow-label {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  color: var(--text-dim);
  font-size: 0.75rem;
}
.arrow { color: var(--accent); font-size: 1.25rem; }
.extraction-card {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.extraction-tag {
  display: inline-block;
  background: rgba(245,158,11,0.12);
  color: var(--accent);
  font-size: 0.75rem;
  font-family: monospace;
  padding: 3px 8px;
  border-radius: 4px;
}
.extraction-keyword {
  font-size: 0.8125rem;
  color: var(--text-muted);
  font-family: monospace;
}
.page-card {
  background: var(--bg);
  border: 1px solid var(--accent-dim);
  border-radius: 10px;
  padding: 20px 24px;
}
.page-card h4 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.9375rem;
  margin-bottom: 8px;
}
.page-card p {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

/* MONETIZATION */
.monetization {
  padding: 80px 40px;
  max-width: 1100px;
  margin: 0 auto;
  border-top: 1px solid var(--border);
}
.monetization-header {
  margin-bottom: 48px;
}
.monetization-header h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  letter-spacing: -0.02em;
}
.monetization-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.monetize-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px 28px;
}
.monetize-card h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.0625rem;
  margin-bottom: 12px;
}
.monetize-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 16px;
}
.monetize-detail {
  font-size: 0.8125rem;
  color: var(--accent);
  font-weight: 500;
  border-top: 1px solid var(--border);
  padding-top: 16px;
  margin-top: 16px;
}

/* STACKS */
.stacks {
  padding: 80px 40px;
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.stacks-inner {
  max-width: 1100px;
  margin: 0 auto;
}
.stacks-intro {
  font-size: 1rem;
  color: var(--text-muted);
  margin: 12px 0 40px;
}
.stacks-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.stack-item {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.stack-name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--text);
}
.stack-role {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

/* CLOSING */
.closing {
  padding: 100px 40px;
  max-width: 1100px;
  margin: 0 auto;
  border-top: 1px solid var(--border);
}
.closing-inner {
  max-width: 680px;
}
.closing h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2rem, 4vw, 3.25rem);
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 28px;
}
.closing p {
  font-size: 1.0625rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 20px;
}
.closing-stat {
  margin-top: 56px;
  display: flex;
  align-items: baseline;
  gap: 20px;
  padding: 32px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
}
.closing-number {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 2.25rem;
  color: var(--accent);
  letter-spacing: -0.03em;
  flex-shrink: 0;
}
.closing-label {
  font-size: 0.9375rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* FOOTER */
.footer {
  border-top: 1px solid var(--border);
  padding: 40px 40px;
}
.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.footer-name {
  display: block;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.125rem;
  margin-bottom: 4px;
}
.footer-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
}
.footer-meta {
  font-size: 0.8125rem;
  color: var(--text-dim);
}

/* RESPONSIVE */
@media (max-width: 768px) {
  .hero { padding: 64px 24px 56px; }
  .hero-stats { flex-direction: column; }
  .stat-divider { width: 100%; height: 1px; }
  .stat { padding: 20px 24px; }
  .how, .monetization, .closing { padding: 64px 24px; }
  .dataflow { padding: 64px 24px; }
  .dataflow-grid { grid-template-columns: 1fr; gap: 40px; }
  .monetization-cards { grid-template-columns: 1fr; }
  .stacks-grid { grid-template-columns: repeat(2, 1fr); }
  .stacks { padding: 64px 24px; }
  .nav { padding: 0 24px; }
  .footer { padding: 32px 24px; }
  .footer-inner { flex-direction: column; gap: 16px; align-items: flex-start; }
  .closing-stat { flex-direction: column; gap: 8px; }
}

@media (max-width: 480px) {
  .hero-headline { font-size: 2.25rem; }
  .stacks-grid { grid-template-columns: 1fr; }
}