:root {
  --bg: #09090b;
  --fg: #fafafa;
  --fg-muted: #a1a1aa;
  --fg-subtle: #52525b;
  --accent: #22d3ee;
  --accent-dim: rgba(34, 211, 238, 0.15);
  --surface: #18181b;
  --border: rgba(255, 255, 255, 0.08);
}

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

body {
  background: var(--bg);
  color: var(--fg);
  font-family: 'DM Sans', -apple-system, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* Nav */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 1.25rem 2rem;
  backdrop-filter: blur(12px);
  background: rgba(9, 9, 11, 0.8);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.logo {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  color: var(--fg);
}

/* Hero */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8rem 2rem 6rem;
  position: relative;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: 
    radial-gradient(ellipse 80% 60% at 50% 0%, rgba(34, 211, 238, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse 60% 40% at 80% 50%, rgba(34, 211, 238, 0.04) 0%, transparent 50%);
  pointer-events: none;
}

.hero-content {
  max-width: 860px;
  text-align: center;
  position: relative;
  z-index: 1;
}

.hero-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 0.5rem 1rem;
  border-radius: 100px;
  margin-bottom: 2rem;
  border: 1px solid rgba(34, 211, 238, 0.2);
}

.hero h1 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(3rem, 8vw, 5.5rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: 1.75rem;
  background: linear-gradient(180deg, var(--fg) 0%, var(--fg-muted) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.lede {
  font-size: 1.25rem;
  color: var(--fg-muted);
  max-width: 580px;
  margin: 0 auto 3rem;
  line-height: 1.7;
}

/* Pulse Animation */
.hero-visual {
  position: relative;
  width: 120px;
  height: 120px;
  margin: 0 auto;
}

.pulse-ring {
  position: absolute;
  inset: 0;
  border: 2px solid var(--accent);
  border-radius: 50%;
  opacity: 0;
  animation: pulse-out 3s ease-out infinite;
}

.pulse-ring.delay { animation-delay: 1s; }
.pulse-ring.delay-2 { animation-delay: 2s; }

.pulse-core {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 16px;
  height: 16px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 30px var(--accent), 0 0 60px rgba(34, 211, 238, 0.4);
}

@keyframes pulse-out {
  0% { transform: scale(1); opacity: 0.8; }
  100% { transform: scale(4); opacity: 0; }
}

/* Features */
.features {
  padding: 6rem 2rem;
  border-top: 1px solid var(--border);
}

.features-header {
  text-align: center;
  max-width: 600px;
  margin: 0 auto 4rem;
}

.features-header h2 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

.features-header p {
  color: var(--fg-muted);
  font-size: 1.125rem;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  max-width: 1200px;
  margin: 0 auto;
}

.feature {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2rem;
  transition: border-color 0.2s, transform 0.2s;
}

.feature:hover {
  border-color: rgba(34, 211, 238, 0.3);
  transform: translateY(-2px);
}

.feature-icon {
  width: 48px;
  height: 48px;
  background: var(--accent-dim);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  margin-bottom: 1.25rem;
}

.feature h3 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.feature p {
  color: var(--fg-muted);
  font-size: 0.9375rem;
  line-height: 1.6;
}

/* Closing */
.closing {
  padding: 8rem 2rem;
  text-align: center;
  border-top: 1px solid var(--border);
  background: linear-gradient(180deg, transparent 0%, rgba(34, 211, 238, 0.03) 100%);
}

.closing-inner {
  max-width: 720px;
  margin: 0 auto;
}

.closing h2 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
  line-height: 1.2;
}

.closing p {
  color: var(--fg-muted);
  font-size: 1.125rem;
  line-height: 1.7;
  margin-bottom: 2.5rem;
}

.closing-tag {
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 0.75rem 1.5rem;
  border-radius: 100px;
  border: 1px solid rgba(34, 211, 238, 0.2);
}

/* Footer */
.footer {
  padding: 3rem 2rem;
  border-top: 1px solid var(--border);
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.footer-logo {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 1rem;
}

.footer-tag {
  font-size: 0.875rem;
  color: var(--fg-muted);
}

.footer-meta {
  font-size: 0.875rem;
  color: var(--fg-subtle);
}

/* Responsive */
@media (max-width: 768px) {
  .hero {
    padding: 6rem 1.5rem 4rem;
  }
  
  .features {
    padding: 4rem 1.5rem;
  }
  
  .closing {
    padding: 5rem 1.5rem;
  }
  
  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
}