:root {
  --bg: #09090b;
  --surface: #111113;
  --surface-2: #18181b;
  --border: #27272a;
  --fg: #fafafa;
  --fg-2: #a1a1aa;
  --fg-3: #71717a;
  --accent: #00d4ff;
  --accent-dim: rgba(0, 212, 255, 0.15);
  --violet: #7c3aed;
  --violet-dim: rgba(124, 58, 237, 0.2);
  --success: #22c55e;
  --font-display: 'Space Grotesk', system-ui, sans-serif;
  --font-body: 'DM Sans', system-ui, sans-serif;
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  line-height: 1.6;
}

/* NAV */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  border-bottom: 1px solid var(--border);
  background: rgba(9, 9, 11, 0.8);
  backdrop-filter: blur(12px);
}
.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.nav-name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.125rem;
  letter-spacing: -0.02em;
}
.nav-badge {
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  background: var(--accent-dim);
  color: var(--accent);
  border: 1px solid rgba(0, 212, 255, 0.25);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  font-size: 0.65rem;
}

/* HERO */
.hero {
  position: relative;
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  padding: 8rem 2rem 4rem;
  max-width: 1200px;
  margin: 0 auto;
  gap: 4rem;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}
.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 212, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 255, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 40%, transparent 100%);
}
.hero-glow {
  position: absolute;
  top: 20%;
  left: 30%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(0, 212, 255, 0.08) 0%, transparent 70%);
  pointer-events: none;
}
.hero-content {
  position: relative;
  z-index: 2;
}
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--fg-2);
  margin-bottom: 1.5rem;
}
.eyebrow-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
  animation: pulse-dot 2s ease-in-out infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}
.hero-headline {
  font-family: var(--font-display);
  font-size: clamp(3rem, 6vw, 4.5rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
}
.hero-accent {
  background: linear-gradient(135deg, var(--accent), #7c3aed);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-lede {
  font-size: 1.125rem;
  color: var(--fg-2);
  max-width: 440px;
  line-height: 1.7;
  margin-bottom: 2.5rem;
}
.hero-metrics {
  display: flex;
  align-items: center;
  gap: 2rem;
}
.metric-value {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 0.25rem;
}
.metric-label {
  font-size: 0.75rem;
  color: var(--fg-3);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.metric-divider {
  width: 1px;
  height: 40px;
  background: var(--border);
}

/* PULSE DISPLAY */
.hero-visual {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
}
.pulse-display {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2rem;
  width: 100%;
  max-width: 420px;
  box-shadow: 0 0 60px rgba(0, 212, 255, 0.05);
}
.pulse-label {
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--fg-3);
  margin-bottom: 1.25rem;
}
.pulse-bars {
  display: flex;
  align-items: flex-end;
  gap: 6px;
  height: 80px;
  margin-bottom: 1rem;
}
.bar {
  flex: 1;
  height: var(--h);
  background: var(--surface-2);
  border-radius: 3px 3px 0 0;
  transition: height 0.3s ease;
  min-height: 4px;
}
.bar.active {
  background: linear-gradient(180deg, var(--accent), rgba(0, 212, 255, 0.3));
  box-shadow: 0 0 8px rgba(0, 212, 255, 0.3);
}
.pulse-status {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  color: var(--success);
}
.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 6px var(--success);
  animation: pulse-dot 2s ease-in-out infinite;
}

/* FEATURES */
.features {
  padding: 6rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
  border-top: 1px solid var(--border);
}
.features-header {
  text-align: center;
  margin-bottom: 4rem;
}
.features-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
}
.features-subtitle {
  color: var(--fg-2);
  font-size: 1.0625rem;
  max-width: 480px;
  margin: 0 auto;
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--border);
  border-radius: 16px;
  overflow: hidden;
}
.feature-card {
  background: var(--surface);
  padding: 2.5rem;
  transition: background 0.2s;
}
.feature-card:hover {
  background: var(--surface-2);
}
.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  background: var(--accent-dim);
  border: 1px solid rgba(0, 212, 255, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
}
.feature-title {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  letter-spacing: -0.01em;
}
.feature-desc {
  font-size: 0.9375rem;
  color: var(--fg-2);
  line-height: 1.65;
}

/* HOW IT WORKS */
.how-it-works {
  padding: 6rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
  border-top: 1px solid var(--border);
}
.how-header {
  margin-bottom: 4rem;
}
.how-title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
}
.how-subtitle {
  color: var(--fg-2);
  font-size: 1rem;
}
.how-steps {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  align-items: start;
  gap: 2rem;
}
.step {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
}
.step-number {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);
  opacity: 0.4;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}
.step-title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}
.step-desc {
  font-size: 0.875rem;
  color: var(--fg-2);
  line-height: 1.65;
}
.step-arrow {
  padding-top: 2.5rem;
  display: flex;
  align-items: flex-start;
  justify-content: center;
}

/* CLOSING */
.closing {
  padding: 8rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  border-top: 1px solid var(--border);
}
.closing-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.3rem 0.85rem;
  border-radius: 999px;
  background: var(--violet-dim);
  color: #a78bfa;
  border: 1px solid rgba(124, 58, 237, 0.3);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  font-size: 0.65rem;
  margin-bottom: 2rem;
}
.closing-headline {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
}
.closing-headline em {
  font-style: normal;
  background: linear-gradient(135deg, var(--accent), #7c3aed);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.closing-body {
  font-size: 1.0625rem;
  color: var(--fg-2);
  line-height: 1.7;
}
.closing-visual {
  display: flex;
  align-items: center;
  justify-content: center;
}
.closing-pulse {
  position: relative;
  width: 240px;
  height: 240px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.pulse-ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(0, 212, 255, 0.15);
  animation: ring-expand 3s ease-out infinite;
}
.pulse-ring:nth-child(1) { width: 100px; height: 100px; animation-delay: 0s; }
.pulse-ring:nth-child(2) { width: 160px; height: 160px; animation-delay: 0.5s; }
.pulse-ring:nth-child(3) { width: 220px; height: 220px; animation-delay: 1s; }
@keyframes ring-expand {
  0% { opacity: 0.6; transform: scale(0.9); }
  100% { opacity: 0; transform: scale(1.1); }
}
.pulse-center {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--accent-dim);
  border: 1px solid rgba(0, 212, 255, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 2;
}

/* FOOTER */
.footer {
  border-top: 1px solid var(--border);
  padding: 2.5rem 2rem;
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.footer-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.9375rem;
}
.footer-tagline {
  font-size: 0.8125rem;
  color: var(--fg-3);
  margin-top: 0.25rem;
}
.footer-meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
  color: var(--fg-3);
}
.footer-cohort {
  color: var(--fg-2);
}
.footer-divider {
  opacity: 0.4;
}

/* RESPONSIVE */
@media (max-width: 768px) {
  .hero {
    grid-template-columns: 1fr;
    padding: 7rem 1.5rem 3rem;
    gap: 3rem;
    text-align: center;
  }
  .hero-metrics {
    justify-content: center;
  }
  .hero-lede {
    margin-left: auto;
    margin-right: auto;
  }
  .hero-visual {
    order: -1;
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
  .how-steps {
    grid-template-columns: 1fr;
  }
  .step-arrow {
    display: none;
  }
  .closing {
    grid-template-columns: 1fr;
    padding: 4rem 1.5rem;
    gap: 3rem;
  }
  .closing-visual {
    order: -1;
  }
  .closing-pulse {
    width: 160px;
    height: 160px;
  }
  .pulse-ring:nth-child(3) { display: none; }
  .footer-inner {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
}