:root {
  --bg: #0a0a0f;
  --bg-elevated: #111118;
  --bg-card: #16161f;
  --fg: #e8e8ed;
  --fg-muted: #8888a0;
  --fg-dim: #55556a;
  --accent: #00ff88;
  --accent-dim: rgba(0, 255, 136, 0.15);
  --accent-glow: rgba(0, 255, 136, 0.3);
  --border: #22222e;
  --font-display: 'Space Grotesk', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

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

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

/* ---- HERO ---- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px 24px;
  overflow: hidden;
}

.hero-grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: 0.3;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, black 20%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, black 20%, transparent 70%);
}

.hero-content {
  position: relative;
  max-width: 720px;
  text-align: center;
}

.protocol-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border: 1px solid var(--accent-dim);
  border-radius: 100px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 2px;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 40px;
  background: var(--accent-dim);
}

.dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  display: inline-block;
}

.dot.pulse {
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 0 var(--accent-glow); }
  50% { opacity: 0.6; box-shadow: 0 0 12px 4px var(--accent-glow); }
}

.hero h1 {
  font-size: clamp(2.8rem, 6vw, 4.5rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -1.5px;
  margin-bottom: 24px;
}

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

.lede {
  font-size: clamp(1rem, 2vw, 1.15rem);
  color: var(--fg-muted);
  max-width: 560px;
  margin: 0 auto 48px;
  line-height: 1.7;
}

.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
  padding: 24px 32px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 12px;
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.stat-value {
  font-size: 2rem;
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--accent);
}

.stat-label {
  font-size: 0.75rem;
  color: var(--fg-dim);
  text-transform: uppercase;
  letter-spacing: 1.5px;
}

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

/* ---- LAYERS ---- */
.layers {
  padding: 120px 24px;
  background: var(--bg);
}

.layers-inner {
  max-width: 1080px;
  margin: 0 auto;
}

.section-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 3px;
  color: var(--fg-dim);
  text-transform: uppercase;
  margin-bottom: 16px;
}

.layers h2, .metrics h2, .closing h2 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  letter-spacing: -1px;
  margin-bottom: 56px;
  line-height: 1.15;
}

.layer-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.layer-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 36px 28px;
  position: relative;
  transition: border-color 0.3s;
}

.layer-card:hover {
  border-color: var(--accent-dim);
}

.layer-number {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--fg-dim);
  letter-spacing: 2px;
  margin-bottom: 20px;
}

.layer-icon {
  font-size: 2rem;
  color: var(--accent);
  margin-bottom: 16px;
}

.layer-card h3 {
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.layer-subtitle {
  font-size: 0.85rem;
  color: var(--fg-dim);
  font-family: var(--font-mono);
  margin-bottom: 16px;
}

.layer-card p:last-of-type:not(.layer-subtitle) {
  color: var(--fg-muted);
  font-size: 0.95rem;
  margin-bottom: 24px;
}

.layer-metric {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.metric-arrow {
  font-size: 0.65rem;
}

/* ---- METRICS ---- */
.metrics {
  padding: 120px 24px;
  background: var(--bg-elevated);
}

.metrics-inner {
  max-width: 1080px;
  margin: 0 auto;
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.metric-item {
  padding: 32px 28px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--bg-card);
  transition: border-color 0.3s;
}

.metric-item:hover {
  border-color: var(--accent-dim);
}

.metric-icon {
  font-size: 1.4rem;
  color: var(--accent);
  margin-bottom: 16px;
}

.metric-item h4 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.metric-item p {
  color: var(--fg-muted);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* ---- CLOSING ---- */
.closing {
  padding: 140px 24px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.closing-inner {
  max-width: 640px;
  margin: 0 auto;
  position: relative;
}

.closing-glow {
  position: absolute;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  pointer-events: none;
  opacity: 0.4;
}

.closing h2 {
  margin-bottom: 24px;
}

.closing p {
  color: var(--fg-muted);
  font-size: 1.05rem;
  line-height: 1.8;
  margin-bottom: 40px;
}

.closing-bar {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 20px;
  border: 1px solid var(--accent-dim);
  border-radius: 100px;
  background: var(--accent-dim);
}

.closing-status {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  letter-spacing: 0.5px;
}

/* ---- FOOTER ---- */
.site-footer {
  padding: 60px 24px 40px;
  text-align: center;
  background: var(--bg);
}

.footer-inner {
  max-width: 480px;
  margin: 0 auto;
}

.footer-brand {
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: -0.5px;
  margin-bottom: 6px;
}

.footer-tagline {
  font-size: 0.8rem;
  color: var(--fg-dim);
  margin-bottom: 24px;
}

.footer-line {
  width: 48px;
  height: 1px;
  background: var(--border);
  margin: 0 auto 24px;
}

.footer-bottom {
  font-size: 0.75rem;
  color: var(--fg-dim);
}

.footer-dot {
  margin: 0 8px;
}

/* ---- RESPONSIVE ---- */
@media (max-width: 768px) {
  .layer-grid {
    grid-template-columns: 1fr;
  }

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

  .hero-stats {
    flex-direction: column;
    gap: 16px;
    padding: 20px;
  }

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

  .hero {
    min-height: auto;
    padding: 100px 20px 80px;
  }

  .layers, .metrics {
    padding: 80px 20px;
  }

  .closing {
    padding: 100px 20px;
  }
}