:root {
  --bg: #0a0c10;
  --surface: #111318;
  --surface-2: #181b22;
  --fg: #f0f2f5;
  --fg-2: #9ba3b0;
  --fg-3: #5c6470;
  --accent: #00d4ff;
  --accent-2: #0099cc;
  --border: #1e2330;
  --green: #00e676;
}

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

html { font-size: 16px; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: 'DM Sans', system-ui, sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: 'Space Grotesk', system-ui, sans-serif;
  font-weight: 700;
  line-height: 1.1;
}

/* Nav */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(10, 12, 16, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  font-family: 'Space Grotesk', system-ui, sans-serif;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--fg);
  letter-spacing: -0.02em;
}
.nav-tagline {
  font-size: 0.8rem;
  color: var(--fg-3);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* Hero */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 8rem 2rem 4rem;
}
.hero-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}
.hero-label {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.5rem;
  padding: 0.4rem 0.8rem;
  border: 1px solid rgba(0, 212, 255, 0.3);
  background: rgba(0, 212, 255, 0.05);
}
.hero-headline {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
  color: var(--fg);
}
.hero-sub {
  font-size: 1.1rem;
  color: var(--fg-2);
  max-width: 480px;
  line-height: 1.7;
}

/* Hero visual */
.hero-visual {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 1.5rem;
}
.screen-block {
  background: var(--surface-2);
  border: 1px solid var(--border);
}
.screen-label {
  padding: 0.6rem 1rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--fg-2);
  border-bottom: 1px solid var(--border);
  letter-spacing: 0.05em;
}
.screen-content {
  padding: 1rem;
}
.ad-slot {
  background: var(--bg);
  border: 2px dashed var(--border);
  padding: 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}
.ad-placeholder {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--fg-3);
  letter-spacing: 0.1em;
}
.ad-status {
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.3rem 0.6rem;
  background: rgba(0, 230, 118, 0.15);
  color: var(--green);
  letter-spacing: 0.05em;
}
.screen-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
}
.stat {
  background: var(--bg);
  padding: 0.8rem;
  text-align: center;
}
.stat-value {
  font-family: 'Space Grotesk', system-ui, sans-serif;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--accent);
}
.stat-label {
  font-size: 0.65rem;
  color: var(--fg-3);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 0.2rem;
}
.agent-indicator {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 1rem;
  font-size: 0.8rem;
  color: var(--green);
}
.agent-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 8px var(--green);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* Features */
.features {
  padding: 6rem 2rem;
  border-top: 1px solid var(--border);
}
.features-header {
  max-width: 1200px;
  margin: 0 auto 3rem;
}
.features-header h2 {
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  letter-spacing: -0.02em;
}
.features-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}
.feature {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 2rem;
}
.feature-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  margin-bottom: 1.25rem;
}
.feature h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  letter-spacing: -0.01em;
}
.feature p {
  font-size: 0.9rem;
  color: var(--fg-2);
  line-height: 1.7;
}

/* How */
.how {
  padding: 6rem 2rem;
  background: var(--surface);
  border-top: 1px solid var(--border);
}
.how-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}
.how-label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}
.how-left h2 {
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
}
.how-left p {
  color: var(--fg-2);
  margin-bottom: 1rem;
  font-size: 0.95rem;
  line-height: 1.7;
}
.how-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 2.5rem;
  padding-top: 2.5rem;
  border-top: 1px solid var(--border);
}
.how-stat-value {
  font-family: 'Space Grotesk', system-ui, sans-serif;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--fg);
  margin-bottom: 0.25rem;
}
.how-stat-label {
  font-size: 0.7rem;
  color: var(--fg-3);
  line-height: 1.4;
}
.comparison {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
.comparison-col {
  background: var(--surface-2);
  border: 1px solid var(--border);
  padding: 1.5rem;
}
.comparison-col-ai {
  border-color: rgba(0, 212, 255, 0.3);
  background: rgba(0, 212, 255, 0.03);
}
.comparison-label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--fg-3);
  margin-bottom: 1rem;
}
.comparison-item {
  font-size: 0.8rem;
  color: var(--fg-2);
  padding: 0.4rem 0;
  border-bottom: 1px solid var(--border);
  line-height: 1.4;
}
.comparison-item:last-child { border-bottom: none; }
.comparison-col-ai .comparison-item { color: var(--fg); }

/* Closing */
.closing {
  padding: 8rem 2rem;
  text-align: center;
  border-top: 1px solid var(--border);
}
.closing-inner {
  max-width: 700px;
  margin: 0 auto;
}
.closing h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  letter-spacing: -0.02em;
  margin-bottom: 2rem;
  line-height: 1.2;
}
.closing p {
  color: var(--fg-2);
  font-size: 1rem;
  line-height: 1.8;
  margin-bottom: 1rem;
}
.closing-tagline {
  font-family: 'Space Grotesk', system-ui, sans-serif;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--accent);
  margin-top: 3rem;
  letter-spacing: -0.01em;
}

/* Footer */
.footer {
  padding: 3rem 2rem;
  border-top: 1px solid var(--border);
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 1rem;
}
.footer-logo {
  font-family: 'Space Grotesk', system-ui, sans-serif;
  font-weight: 700;
  font-size: 1rem;
}
.footer-desc {
  font-size: 0.8rem;
  color: var(--fg-3);
}
.footer-note {
  font-size: 0.85rem;
  color: var(--fg-2);
}

/* Responsive */
@media (max-width: 768px) {
  .hero-grid, .features-grid, .how-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .hero { padding-top: 6rem; }
  .how-stats { grid-template-columns: 1fr; }
  .comparison { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; gap: 1rem; text-align: center; }
  .nav-inner { padding: 0.75rem 1rem; }
}

@media (max-width: 480px) {
  html { font-size: 14px; }
  .screen-stats { grid-template-columns: 1fr; }
}