:root {
  --bg: #0c0c0f;
  --surface: #141418;
  --surface-2: #1e1e24;
  --border: #2a2a33;
  --fg: #f0ece4;
  --fg-muted: #8a8690;
  --accent: #c8ff47;
  --accent-dim: rgba(200, 255, 71, 0.12);
  --red: #ff6b6b;
  --font-head: 'Syne', sans-serif;
  --font-body: 'Plus Jakarta Sans', sans-serif;
}

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

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* Nav */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 20px 40px;
  background: rgba(12, 12, 15, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 16px;
}
.nav-logo {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 22px;
  letter-spacing: -0.5px;
  color: var(--accent);
}
.nav-tagline {
  font-size: 12px;
  color: var(--fg-muted);
  letter-spacing: 0.5px;
  text-transform: uppercase;
}
.nav-link {
  font-size: 13px;
  font-weight: 600;
  color: var(--fg-muted);
  text-decoration: none;
  padding: 8px 16px;
  border-radius: 8px;
  border: 1px solid var(--border);
  transition: all 0.2s;
}
.nav-link:hover {
  color: var(--accent);
  border-color: var(--accent);
}

/* Hero */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 40px 80px;
  background: radial-gradient(ellipse 80% 60% at 60% 40%, rgba(200, 255, 71, 0.04) 0%, transparent 70%);
}
.hero-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.hero-headline {
  font-family: var(--font-head);
  font-size: clamp(36px, 5vw, 64px);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -1.5px;
  color: var(--fg);
  margin-bottom: 24px;
}
.hero-sub {
  font-size: 18px;
  color: var(--fg-muted);
  line-height: 1.65;
  max-width: 480px;
  margin-bottom: 28px;
}
.hero-tags {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.tag {
  background: var(--accent-dim);
  color: var(--accent);
  font-size: 12px;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: 100px;
  letter-spacing: 0.3px;
}

/* Hero Visual */
.hero-visual {
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.data-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px;
  font-family: var(--font-body);
}
.data-card-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}
.data-card-line {
  font-size: 15px;
  color: var(--fg-muted);
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
}
.data-card-line:last-of-type { border-bottom: none; }
.val { color: var(--fg); font-weight: 600; }
.data-card-source {
  font-size: 11px;
  color: var(--fg-muted);
  margin-top: 12px;
  opacity: 0.6;
}

.node-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}
.node {
  font-size: 12px;
  font-weight: 600;
  padding: 8px 16px;
  border-radius: 8px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--fg-muted);
}
.node-hub {
  background: var(--accent-dim);
  border-color: var(--accent);
  color: var(--accent);
}

/* Stack */
.stack {
  padding: 80px 40px;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.stack-inner { max-width: 1200px; margin: 0 auto; }
.stack-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--fg-muted);
  margin-bottom: 32px;
}
.stack-flow {
  display: flex;
  align-items: center;
  gap: 0;
  flex-wrap: wrap;
}
.stack-box {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px 24px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 15px;
  text-align: center;
}
.stack-box-accent {
  background: var(--accent-dim);
  border-color: var(--accent);
  color: var(--accent);
}
.stack-sub {
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: 400;
  color: var(--fg-muted);
  display: block;
  margin-top: 4px;
}
.stack-arrow {
  font-size: 20px;
  color: var(--fg-muted);
  padding: 0 16px;
}
.stack-note {
  margin-top: 24px;
  font-size: 13px;
  color: var(--fg-muted);
}

/* Features */
.features {
  padding: 100px 40px;
  background: var(--bg);
}
.features-inner { max-width: 1200px; margin: 0 auto; }
.features-title {
  font-family: var(--font-head);
  font-size: clamp(28px, 3.5vw, 48px);
  font-weight: 700;
  letter-spacing: -1px;
  color: var(--fg);
  margin-bottom: 64px;
  line-height: 1.15;
}
.features-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}
.feature-block {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 40px;
}
.feature-icon {
  color: var(--accent);
  margin-bottom: 20px;
}
.feature-block h3 {
  font-family: var(--font-head);
  font-size: 22px;
  font-weight: 700;
  color: var(--fg);
  margin-bottom: 12px;
}
.feature-block > p {
  font-size: 14px;
  color: var(--fg-muted);
  line-height: 1.65;
  margin-bottom: 24px;
}
.feature-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 28px;
}
.feature-list li {
  font-size: 14px;
  color: var(--fg-muted);
  padding-left: 18px;
  position: relative;
}
.feature-list li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-size: 12px;
}
.feature-pricing {
  font-size: 13px;
  color: var(--fg-muted);
}
.feature-pricing strong {
  color: var(--fg);
  font-size: 20px;
}

/* Mission */
.mission {
  padding: 100px 40px;
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.mission-inner { max-width: 1200px; margin: 0 auto; }
.mission-quote {
  max-width: 800px;
  margin: 0 auto 64px;
  text-align: center;
}
.mission-text {
  font-family: var(--font-head);
  font-size: clamp(22px, 3vw, 36px);
  font-weight: 600;
  line-height: 1.4;
  color: var(--fg);
  letter-spacing: -0.5px;
}
.mission-attr {
  margin-top: 20px;
  font-size: 14px;
  color: var(--fg-muted);
}
.mission-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
  text-align: center;
}
.stat-val {
  font-family: var(--font-head);
  font-size: 48px;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: -2px;
  margin-bottom: 8px;
}
.stat-label {
  font-size: 14px;
  color: var(--fg-muted);
  line-height: 1.5;
}

/* Closing */
.closing {
  padding: 100px 40px;
}
.closing-inner { max-width: 1200px; margin: 0 auto; }
.closing-headline {
  font-family: var(--font-head);
  font-size: clamp(28px, 4vw, 56px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -1.5px;
  color: var(--fg);
  margin-bottom: 24px;
}
.closing-sub {
  font-size: 18px;
  color: var(--fg-muted);
  max-width: 580px;
  margin-bottom: 64px;
  line-height: 1.65;
}
.closing-models {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.model {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px;
}
.model-title {
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 8px;
}
.model-desc {
  font-size: 13px;
  color: var(--fg-muted);
  line-height: 1.55;
}

/* Footer */
.footer {
  border-top: 1px solid var(--border);
  padding: 40px;
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 40px;
}
.footer-logo {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 20px;
  color: var(--accent);
  display: block;
  margin-bottom: 8px;
}
.footer-desc {
  font-size: 13px;
  color: var(--fg-muted);
  max-width: 300px;
}
.footer-meta {
  font-size: 12px;
  color: var(--fg-muted);
  opacity: 0.6;
  text-align: right;
}

/* Responsive */
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; gap: 48px; }
  .hero-visual { display: none; }
  .features-grid { grid-template-columns: 1fr; }
  .mission-stats { grid-template-columns: 1fr; gap: 32px; }
  .closing-models { grid-template-columns: 1fr 1fr; }
  .footer-inner { flex-direction: column; }
  .footer-meta { text-align: left; }
  .stack-flow { gap: 8px; }
  .stack-arrow { padding: 0 8px; }
}
@media (max-width: 600px) {
  .nav { padding: 16px 20px; }
  .hero { padding: 100px 20px 60px; }
  .stack, .features, .mission, .closing { padding: 60px 20px; }
  .closing-models { grid-template-columns: 1fr; }
}