:root {
  --bg-primary: #0a0b0f;
  --bg-secondary: #12141c;
  --bg-card: #161823;
  --bg-card-hover: #1a1d2a;
  --fg-primary: #e8eaf0;
  --fg-secondary: #8b8fa3;
  --fg-muted: #555872;
  --accent: #00d4aa;
  --accent-dim: rgba(0, 212, 170, 0.12);
  --accent-glow: rgba(0, 212, 170, 0.25);
  --warning: #f5a623;
  --border: #1f2233;
  --border-subtle: #171926;
  --font-display: 'Space Grotesk', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;
  --radius: 12px;
  --radius-sm: 8px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

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

/* === HERO === */
.hero {
  padding: 100px 24px 80px;
  max-width: 1200px;
  margin: 0 auto;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 20px;
}

.hero h1 {
  font-size: 3.5rem;
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}

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

.lede {
  font-size: 1.15rem;
  color: var(--fg-secondary);
  line-height: 1.7;
  max-width: 480px;
}

/* Data Card */
.data-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  position: relative;
  overflow: hidden;
}

.data-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), transparent);
}

.data-card-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--fg-muted);
}

.data-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent-glow);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.data-region {
  margin-left: auto;
  color: var(--fg-secondary);
}

.data-metric {
  margin-bottom: 24px;
}

.data-value {
  font-size: 2.8rem;
  font-weight: 700;
  color: var(--accent);
  display: block;
  letter-spacing: -0.02em;
}

.data-sublabel {
  font-size: 0.85rem;
  color: var(--fg-muted);
  font-family: var(--font-mono);
}

.data-bar-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 20px;
}

.data-bar {
  height: 28px;
  background: var(--accent-dim);
  border-radius: 4px;
  display: flex;
  align-items: center;
  padding: 0 12px;
  font-size: 0.72rem;
  font-family: var(--font-mono);
  color: var(--fg-secondary);
  border-left: 2px solid var(--accent);
  transition: background 0.2s;
}

.data-bar:hover {
  background: var(--accent-glow);
}

.data-card-footer {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--fg-muted);
  padding-top: 16px;
  border-top: 1px solid var(--border-subtle);
}

.confidence {
  color: var(--accent);
}

/* === SIGNAL STATS === */
.signal {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 48px 24px;
  background: var(--bg-secondary);
}

.signal-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 48px;
}

.signal-stat {
  text-align: center;
}

.stat-number {
  display: block;
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--fg-primary);
  letter-spacing: -0.02em;
}

.stat-label {
  display: block;
  font-size: 0.8rem;
  color: var(--fg-muted);
  margin-top: 4px;
  font-family: var(--font-mono);
}

.signal-divider {
  width: 1px;
  height: 40px;
  background: var(--border);
}

/* === FEATURES === */
.features {
  padding: 100px 24px;
  max-width: 1200px;
  margin: 0 auto;
}

.section-header {
  max-width: 640px;
  margin-bottom: 64px;
}

.section-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  display: block;
  margin-bottom: 16px;
}

.section-header h2 {
  font-size: 2.4rem;
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.025em;
  margin-bottom: 20px;
}

.section-sub {
  font-size: 1.05rem;
  color: var(--fg-secondary);
  line-height: 1.7;
}

.feature-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  transition: border-color 0.2s, background 0.2s;
}

.feature-card:hover {
  border-color: var(--accent-dim);
  background: var(--bg-card-hover);
}

.feature-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: var(--accent-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  margin-bottom: 20px;
}

.feature-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 0.92rem;
  color: var(--fg-secondary);
  line-height: 1.65;
}

/* === ADVANTAGE === */
.advantage {
  padding: 100px 24px;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.advantage-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}

.advantage-content h2 {
  font-size: 2.4rem;
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.025em;
  margin-bottom: 24px;
}

.advantage-content p {
  font-size: 1rem;
  color: var(--fg-secondary);
  line-height: 1.7;
  margin-bottom: 16px;
}

.advantage-specs {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.spec {
  display: flex;
  justify-content: space-between;
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
}

.spec:first-child {
  border-top: 1px solid var(--border);
}

.spec-label {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.spec-value {
  font-size: 0.95rem;
  color: var(--fg-primary);
  font-weight: 500;
}

/* === CLOSING === */
.closing {
  padding: 120px 24px;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.closing-inner h2 {
  font-size: 2.8rem;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}

.closing-sub {
  font-size: 1.1rem;
  color: var(--fg-secondary);
  line-height: 1.7;
  max-width: 560px;
  margin: 0 auto;
}

/* === FOOTER === */
.site-footer {
  padding: 40px 24px;
  border-top: 1px solid var(--border);
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-logo {
  font-weight: 600;
  font-size: 1rem;
  color: var(--fg-primary);
}

.footer-tagline {
  display: block;
  font-size: 0.78rem;
  color: var(--fg-muted);
  margin-top: 2px;
}

.footer-meta {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--fg-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-dot {
  color: var(--border);
}

/* === RESPONSIVE === */
@media (max-width: 768px) {
  .hero {
    padding: 60px 20px 48px;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .hero h1 {
    font-size: 2.4rem;
  }

  .signal-inner {
    flex-direction: column;
    gap: 32px;
  }

  .signal-divider {
    width: 40px;
    height: 1px;
  }

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

  .advantage-inner {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .section-header h2,
  .advantage-content h2 {
    font-size: 1.8rem;
  }

  .closing-inner h2 {
    font-size: 2rem;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
    gap: 16px;
  }

  .footer-meta {
    justify-content: center;
  }
}