:root {
  --bg: #0a0e14;
  --surface: #111720;
  --surface-2: #1a2332;
  --border: #1e2a3a;
  --fg: #c9d1d9;
  --fg-muted: #6e7681;
  --fg-subtle: #3d4f63;
  --accent: #58a6ff;
  --accent-dim: #1f3d5c;
  --cost: #f0b429;
  --green: #3fb950;
  --red: #f85149;
  --mono: 'JetBrains Mono', 'Fira Code', monospace;
  --sans: 'DM Sans', system-ui, sans-serif;
}

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

html { font-size: 16px; }

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

/* Navbar */
.navbar {
  padding: 20px 40px;
  border-bottom: 1px solid var(--border);
}
.navbar-inner {
  display: flex;
  align-items: center;
  gap: 8px;
}
.navbar-logo {
  font-family: var(--mono);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--fg);
  letter-spacing: -0.02em;
}
.navbar-badge {
  font-family: var(--mono);
  font-size: 0.65rem;
  font-weight: 600;
  background: var(--accent-dim);
  color: var(--accent);
  padding: 2px 6px;
  border-radius: 4px;
  letter-spacing: 0.05em;
}

/* Hero */
.hero {
  padding: 80px 40px 64px;
  border-bottom: 1px solid var(--border);
}
.hero-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.hero-headline {
  font-family: var(--mono);
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 700;
  line-height: 1.15;
  color: #fff;
  margin-bottom: 20px;
  letter-spacing: -0.03em;
}
.hero-sub {
  font-size: 1.05rem;
  color: var(--fg-muted);
  margin-bottom: 28px;
  line-height: 1.7;
  max-width: 460px;
}
.hero-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.pill {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 5px 12px;
  border-radius: 20px;
  border: 1px solid rgba(88,166,255,0.2);
}

/* Session Card */
.session-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 0 40px rgba(88,166,255,0.06), 0 20px 60px rgba(0,0,0,0.4);
}
.session-card-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  background: var(--surface-2);
}
.session-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--fg-subtle);
}
.session-dot.live {
  background: var(--green);
  box-shadow: 0 0 6px var(--green);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}
.session-label {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  flex: 1;
}
.session-cost {
  font-family: var(--mono);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--cost);
}
.session-card-body {
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.session-row {
  display: flex;
  align-items: baseline;
  gap: 12px;
}
.session-key {
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--fg-subtle);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  min-width: 70px;
}
.session-val {
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--fg);
}
.session-card-footer {
  padding: 10px 16px;
  border-top: 1px solid var(--border);
  background: rgba(240,180,41,0.05);
}
.session-badge {
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--cost);
  opacity: 0.8;
}

/* Live proof */
.liveproof {
  padding: 48px 40px;
  border-bottom: 1px solid var(--border);
}
.liveproof-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 48px;
}
.proof-statement {
  flex-shrink: 0;
}
.proof-label {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--fg-subtle);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 8px;
}
.proof-number {
  font-family: var(--mono);
  font-size: 3rem;
  font-weight: 700;
  color: var(--cost);
  line-height: 1;
  margin-bottom: 6px;
}
.proof-sub {
  font-size: 0.82rem;
  color: var(--fg-muted);
}
.proof-divider {
  width: 1px;
  height: 80px;
  background: var(--border);
}
.proof-stats {
  display: flex;
  gap: 48px;
}
.proof-stat-num {
  font-family: var(--mono);
  font-size: 1.8rem;
  font-weight: 700;
  color: #fff;
  line-height: 1;
  margin-bottom: 4px;
}
.proof-stat-label {
  font-size: 0.8rem;
  color: var(--fg-muted);
}

/* Features */
.features {
  padding: 72px 40px;
  border-bottom: 1px solid var(--border);
}
.features-inner {
  max-width: 1100px;
  margin: 0 auto;
}
.section-label {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 16px;
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}
.feature-card {
  background: var(--surface);
  padding: 32px;
}
.feature-icon {
  color: var(--accent);
  margin-bottom: 16px;
}
.feature-card h3 {
  font-family: var(--mono);
  font-size: 0.95rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 10px;
}
.feature-card p {
  font-size: 0.88rem;
  color: var(--fg-muted);
  line-height: 1.65;
}

/* Philosophy */
.philosophy {
  padding: 72px 40px;
  border-bottom: 1px solid var(--border);
}
.philosophy-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}
.philosophy-headline {
  font-family: var(--mono);
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 700;
  line-height: 1.2;
  color: #fff;
  letter-spacing: -0.03em;
}
.philosophy-right p {
  font-size: 0.95rem;
  color: var(--fg-muted);
  line-height: 1.75;
  margin-bottom: 16px;
}
.philosophy-code {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px 24px;
  margin-top: 24px;
}
.philosophy-code code {
  font-family: var(--mono);
  font-size: 0.82rem;
  line-height: 1.9;
  display: block;
}
.code-comment { color: var(--fg-muted); }
.code-prompt { color: var(--accent); }
.code-val { color: var(--fg); }

/* Closing */
.closing {
  padding: 96px 40px;
  text-align: center;
}
.closing-inner {
  max-width: 640px;
  margin: 0 auto;
}
.closing-headline {
  font-family: var(--mono);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.2;
  color: #fff;
  margin-bottom: 20px;
  letter-spacing: -0.03em;
}
.closing-sub {
  font-size: 1rem;
  color: var(--fg-muted);
  line-height: 1.7;
}

/* Footer */
.footer {
  padding: 32px 40px;
  border-top: 1px solid var(--border);
}
.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 24px;
}
.footer-logo {
  display: flex;
  align-items: center;
  gap: 6px;
}
.footer-name {
  font-family: var(--mono);
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--fg);
}
.footer-badge {
  font-family: var(--mono);
  font-size: 0.6rem;
  font-weight: 600;
  background: var(--accent-dim);
  color: var(--accent);
  padding: 2px 5px;
  border-radius: 4px;
}
.footer-links {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 1;
  margin-left: 24px;
}
.footer-link {
  font-size: 0.82rem;
  color: var(--fg-muted);
  text-decoration: none;
  transition: color 0.15s;
}
.footer-link:hover { color: var(--fg); }
.footer-sep {
  color: var(--fg-subtle);
  font-size: 0.82rem;
}
.footer-note {
  font-size: 0.78rem;
  color: var(--fg-subtle);
  font-family: var(--mono);
}

/* Responsive */
@media (max-width: 768px) {
  .navbar { padding: 16px 20px; }
  .hero { padding: 56px 20px 48px; }
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero-right { order: -1; }
  .session-card { max-width: 400px; }
  .liveproof { padding: 40px 20px; }
  .liveproof-inner { flex-direction: column; gap: 24px; }
  .proof-divider { width: 100%; height: 1px; }
  .proof-stats { gap: 24px; }
  .features { padding: 56px 20px; }
  .features-grid { grid-template-columns: 1fr; }
  .philosophy { padding: 56px 20px; }
  .philosophy-inner { grid-template-columns: 1fr; gap: 32px; }
  .closing { padding: 64px 20px; }
  .footer { padding: 24px 20px; }
  .footer-inner { flex-wrap: wrap; gap: 12px; }
  .footer-links { margin-left: 0; flex-wrap: wrap; }
  .footer-note { width: 100%; }
}