:root {
  --bg: #0a0a0f;
  --bg-surface: #12121a;
  --bg-card: #1a1a26;
  --fg: #e8e8ed;
  --fg-muted: #8888a0;
  --accent: #00e89d;
  --accent-dim: rgba(0, 232, 157, 0.12);
  --accent-glow: rgba(0, 232, 157, 0.25);
  --border: rgba(255, 255, 255, 0.06);
  --font-display: 'Space Grotesk', system-ui, sans-serif;
  --font-body: 'DM Sans', system-ui, sans-serif;
  --max-w: 1120px;
}

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

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* Hero */
.hero {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 100px 24px 80px;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-badge {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 2.5px;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 6px 14px;
  border-radius: 4px;
  margin-bottom: 28px;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -1.5px;
  margin-bottom: 24px;
}

.hero h1 .accent {
  color: var(--accent);
}

.lede {
  font-size: 17px;
  color: var(--fg-muted);
  max-width: 520px;
  line-height: 1.7;
}

.hero-visual {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  gap: 16px;
  transition: border-color 0.2s;
}

.stat-card:hover {
  border-color: var(--accent-glow);
}

.stat-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--fg-muted);
  min-width: 120px;
}

.stat-value {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 700;
  color: var(--accent);
  flex: 1;
}

.stat-sub {
  font-size: 13px;
  color: var(--fg-muted);
}

/* Sections */
.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-tag {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 2.5px;
  color: var(--accent);
  margin-bottom: 16px;
}

.section-header h2 {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  letter-spacing: -1px;
}

/* Model */
.model {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 80px 24px;
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.step {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 36px 28px;
  position: relative;
}

.step-number {
  font-family: var(--font-display);
  font-size: 48px;
  font-weight: 700;
  color: var(--accent-dim);
  line-height: 1;
  margin-bottom: 16px;
  background: linear-gradient(135deg, var(--accent), rgba(0,232,157,0.3));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.step h3 {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
}

.step p {
  color: var(--fg-muted);
  font-size: 15px;
  line-height: 1.7;
}

/* Numbers */
.numbers {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 80px 24px;
}

.math-block {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}

.math-row {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px 28px;
  text-align: center;
}

.math-row.math-result {
  background: var(--accent-dim);
  border-color: var(--accent-glow);
}

.math-label {
  display: block;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--fg-muted);
  margin-bottom: 8px;
}

.math-val {
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 700;
  color: var(--fg);
}

.math-result .math-val {
  color: var(--accent);
}

.math-operator {
  font-family: var(--font-display);
  font-size: 24px;
  color: var(--fg-muted);
}

.math-footnote {
  text-align: center;
  color: var(--fg-muted);
  font-size: 15px;
  max-width: 600px;
  margin: 0 auto;
}

/* Niches */
.niches {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 80px 24px;
}

.niche-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.niche-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px 24px;
  transition: border-color 0.2s, transform 0.2s;
}

.niche-card:hover {
  border-color: var(--accent-glow);
  transform: translateY(-2px);
}

.niche-icon {
  font-size: 28px;
  display: block;
  margin-bottom: 12px;
}

.niche-card h4 {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}

.niche-card p {
  color: var(--fg-muted);
  font-size: 14px;
  line-height: 1.6;
}

/* Closing */
.closing {
  padding: 100px 24px;
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg-surface) 50%, var(--bg) 100%);
}

.closing-inner {
  max-width: 680px;
  margin: 0 auto;
  text-align: center;
}

.closing h2 {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  letter-spacing: -1px;
  margin-bottom: 20px;
}

.closing p {
  color: var(--fg-muted);
  font-size: 17px;
  line-height: 1.8;
}

/* Footer */
.site-footer {
  padding: 32px 24px;
  border-top: 1px solid var(--border);
}

.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

.footer-brand {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 15px;
}

.footer-sep {
  color: var(--fg-muted);
}

.footer-tagline {
  color: var(--fg-muted);
  font-size: 13px;
}

/* Responsive */
@media (max-width: 768px) {
  .hero {
    grid-template-columns: 1fr;
    padding: 60px 20px 48px;
    gap: 40px;
  }

  .steps-grid {
    grid-template-columns: 1fr;
  }

  .niche-grid {
    grid-template-columns: 1fr 1fr;
  }

  .math-block {
    flex-direction: column;
    gap: 12px;
  }

  .math-operator {
    font-size: 18px;
  }
}

@media (max-width: 480px) {
  .niche-grid {
    grid-template-columns: 1fr;
  }

  .stat-card {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .stat-label {
    min-width: auto;
  }
}