:root {
  --bg: #0b0f19;
  --surface: #111827;
  --surface-elevated: #1f2937;
  --border: #374151;
  --text: #f3f4f6;
  --text-muted: #9ca3af;
  --text-dim: #6b7280;
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --accent: #06b6d4;
  --success: #10b981;
  --warning: #f59e0b;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  --radius-sm: 12px;
  --radius-md: 18px;
  --radius-lg: 24px;
  --shadow-soft: 0 20px 50px rgba(0, 0, 0, 0.28);
  --shadow-card: 0 12px 30px rgba(0, 0, 0, 0.22);
  --container: 1200px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  background:
    radial-gradient(circle at top left, rgba(79, 70, 229, 0.10), transparent 30%),
    radial-gradient(circle at top right, rgba(6, 182, 212, 0.10), transparent 24%),
    linear-gradient(180deg, #0b0f19 0%, #0c1220 100%);
  color: var(--text);
  line-height: 1.6;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font: inherit; }
.skip-link {
  position: absolute;
  left: 16px;
  top: -48px;
  background: var(--primary);
  color: white;
  padding: 10px 14px;
  border-radius: 10px;
  z-index: 1000;
  transition: top 0.2s ease;
}
.skip-link:focus { top: 16px; }

.container {
  width: min(var(--container), calc(100% - 48px));
  margin: 0 auto;
}

.section {
  padding: 88px 0;
  position: relative;
}

.eyebrow,
.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  border: 1px solid rgba(6, 182, 212, 0.24);
  background: rgba(6, 182, 212, 0.08);
  color: var(--accent);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  white-space: nowrap;
}

.section-head {
  max-width: 760px;
  margin-bottom: 36px;
}

.section-head h2 {
  font-size: clamp(30px, 4.5vw, 54px);
  line-height: 1.04;
  margin: 14px 0 16px;
  letter-spacing: -0.03em;
}

.section-head p {
  margin: 0;
  color: var(--text-muted);
  font-size: 18px;
  max-width: 70ch;
}

/* ============ HEADER / NAV (fixed: single render, no duplicates) ============ */
header.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(14px);
  background: rgba(11, 15, 25, 0.72);
  border-bottom: 1px solid rgba(55, 65, 81, 0.7);
}

.nav {
  min-height: 78px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  position: relative;
  overflow: visible;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}

.brand-mark {
  width: 40px;
  height: 40px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, rgba(79, 70, 229, 0.24), rgba(6, 182, 212, 0.14));
  border: 1px solid rgba(255, 255, 255, 0.09);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.06);
  color: var(--text);
  flex-shrink: 0;
}

.brand-text strong {
  display: block;
  font-size: 15px;
  letter-spacing: -0.01em;
}

.brand-text span {
  display: block;
  font-size: 13px;
  color: var(--text-dim);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  color: var(--text-muted);
  font-size: 15px;
}

.nav-links a:hover { color: var(--text); }

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 46px;
  padding: 0 18px;
  border-radius: 14px;
  border: 1px solid transparent;
  transition: 0.22s ease;
  font-weight: 600;
  cursor: pointer;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 10px 24px rgba(79, 70, 229, 0.28);
}

.btn-primary:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
}

.btn-secondary {
  background: rgba(255,255,255,0.03);
  border-color: rgba(255,255,255,0.08);
  color: var(--text);
}

.btn-secondary:hover {
  border-color: rgba(79, 70, 229, 0.6);
  background: rgba(79, 70, 229, 0.08);
}

.menu-toggle {
  display: none;
  min-height: 44px;
  min-width: 44px;
  padding: 0 14px;
  border-radius: 12px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  color: var(--text);
}

/* Mobile panel hidden by default on ALL breakpoints until .open is added by JS */
.mobile-panel {
  display: none;
  position: absolute;
  top: calc(100% + 10px);
  left: 0;
  right: 0;
  z-index: 500;
  background: rgba(17, 24, 39, 0.98);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 18px;
  padding: 14px;
  flex-direction: column;
  gap: 8px;
  box-shadow: var(--shadow-soft);
}

.mobile-panel.open {
  display: flex;
}

/* ============ HERO ============ */
.hero {
  padding: 84px 0 72px;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 34px;
  align-items: center;
}

.hero-copy h1 {
  font-size: clamp(40px, 7vw, 78px);
  line-height: 0.95;
  letter-spacing: -0.055em;
  margin: 18px 0 20px;
  max-width: 12ch;
}

.hero-copy p {
  font-size: 19px;
  color: var(--text-muted);
  max-width: 62ch;
  margin: 0 0 28px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 28px;
}

.proof-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.proof-strip .pill {
  background: rgba(255,255,255,0.02);
  border-color: rgba(255,255,255,0.08);
  color: var(--text-muted);
}

.hero-panel {
  background: linear-gradient(180deg, rgba(255,255,255,0.03), rgba(255,255,255,0.01));
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 28px;
  padding: 24px;
  box-shadow: var(--shadow-soft);
  position: relative;
  overflow: hidden;
}

.hero-panel::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(130deg, rgba(79,70,229,0.08), transparent 35%),
    linear-gradient(320deg, rgba(6,182,212,0.06), transparent 28%);
  pointer-events: none;
}

.panel-top {
  position: relative;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 22px;
}

.panel-top h3 {
  margin: 0 0 8px;
  font-size: 18px;
  letter-spacing: -0.02em;
}

.panel-top p {
  margin: 0;
  color: var(--text-muted);
  font-size: 14px;
}

.stat-chip {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--success);
  border: 1px solid rgba(16,185,129,0.24);
  background: rgba(16,185,129,0.08);
  padding: 8px 10px;
  border-radius: 999px;
  white-space: nowrap;
}

.system-map {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 14px;
}

.map-row {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(2, 1fr);
}

.node {
  background: rgba(17,24,39,0.92);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 18px;
  padding: 16px;
  min-height: 118px;
  transition: 0.24s ease;
}

.node:hover {
  border-color: rgba(79,70,229,0.65);
  transform: translateY(-2px);
}

.node-label {
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 10px;
}

.node strong {
  display: block;
  font-size: 16px;
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

.node p {
  margin: 0;
  font-size: 14px;
  color: var(--text-muted);
}

/* ============ GRIDS / CARDS ============ */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.card {
  background: linear-gradient(180deg, rgba(255,255,255,0.025), rgba(255,255,255,0.015));
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 24px;
  padding: 24px;
  box-shadow: var(--shadow-card);
  transition: 0.22s ease;
}

.card:hover {
  border-color: rgba(79,70,229,0.66);
  transform: translateY(-2px);
}

.card h3 {
  margin: 14px 0 12px;
  font-size: 22px;
  line-height: 1.08;
  letter-spacing: -0.03em;
}

.card p {
  margin: 0;
  color: var(--text-muted);
  font-size: 15px;
}

.metric {
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.stakeholder-card ul,
.tier-card ul,
.about-points,
.roadmap-list,
.control-list {
  padding: 0;
  margin: 18px 0 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.stakeholder-card li,
.tier-card li,
.about-points li,
.roadmap-list li,
.control-list li {
  color: var(--text-muted);
  font-size: 15px;
  padding-left: 18px;
  position: relative;
}

.stakeholder-card li::before,
.tier-card li::before,
.about-points li::before,
.roadmap-list li::before,
.control-list li::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 999px;
  background: var(--accent);
  position: absolute;
  left: 0;
  top: 9px;
}

/* ============ ARCHITECTURE / CODE PANEL ============ */
.architecture-layout {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 24px;
  align-items: start;
}

.code-panel {
  background: #0a1220;
  border: 1px solid rgba(6,182,212,0.16);
  border-radius: 24px;
  padding: 24px;
  overflow: hidden;
}

.code-panel .panel-title {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-bottom: 18px;
}

.code-panel h3 {
  margin: 0;
  font-size: 20px;
  letter-spacing: -0.02em;
}

.code-window {
  background: rgba(17,24,39,0.95);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 18px;
  padding: 18px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: #cbd5e1;
  overflow-x: auto;
}

.code-window .k { color: #93c5fd; }
.code-window .s { color: #67e8f9; }
.code-window .n { color: #f8fafc; }
.code-window .ok { color: #6ee7b7; }
.code-window .warn { color: #fbbf24; }

.flow-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.flow-step {
  min-height: 170px;
}

.step-no {
  display: inline-flex;
  margin-bottom: 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent);
  border: 1px solid rgba(6,182,212,0.24);
  background: rgba(6,182,212,0.08);
  padding: 8px 10px;
  border-radius: 999px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

/* ============ TIERS ============ */
.tier-card .price-line {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin: 14px 0 0;
}

.tier-card .price-line strong {
  font-size: 32px;
  letter-spacing: -0.04em;
}

.tier-card .price-line span {
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

/* ============ ABOUT / SPLIT ============ */
.split-highlight {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 24px;
  align-items: stretch;
}

.about-box h3,
.control-box h3,
.contact-box h3 {
  margin: 0 0 14px;
  font-size: 24px;
  letter-spacing: -0.03em;
}

.about-box p,
.control-box p,
.contact-box p {
  margin: 0;
  color: var(--text-muted);
  font-size: 16px;
}

.meta-table {
  display: grid;
  gap: 12px;
  margin-top: 24px;
}

.meta-row {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 16px;
  border-radius: 16px;
  background: rgba(255,255,255,0.02);
  border: 1px solid rgba(255,255,255,0.06);
  font-size: 14px;
}

.meta-row span:first-child {
  color: var(--text-dim);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 12px;
}

/* ============ ROADMAP ============ */
.roadmap-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 16px;
}

.road-card {
  position: relative;
  min-height: 230px;
}

.road-card .step-no {
  margin-bottom: 12px;
}

.road-card h3 {
  margin: 0 0 12px;
  font-size: 20px;
  letter-spacing: -0.02em;
}

/* ============ CONTROL PLANE ============ */
.control-box {
  position: relative;
  overflow: hidden;
}

.control-box::after {
  content: "";
  position: absolute;
  width: 220px;
  height: 220px;
  right: -80px;
  bottom: -100px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(79,70,229,0.15), transparent 68%);
  pointer-events: none;
}

/* ============ CONTACT ============ */
.contact-shell {
  background:
    linear-gradient(180deg, rgba(79,70,229,0.12), rgba(6,182,212,0.05)),
    rgba(17,24,39,0.86);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 28px;
  padding: 34px;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 24px;
  align-items: start;
}

.contact-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.mini-stat {
  background: rgba(11,15,25,0.5);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 18px;
  padding: 18px;
}

.mini-stat strong {
  display: block;
  font-size: 28px;
  margin-bottom: 8px;
  letter-spacing: -0.04em;
}

.mini-stat span {
  color: var(--text-muted);
  font-size: 14px;
}

.cta-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

/* ============ FOOTER ============ */
footer {
  padding: 32px 0 48px;
  border-top: 1px solid rgba(255,255,255,0.06);
  color: var(--text-dim);
}

.footer-row {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: center;
  flex-wrap: wrap;
  font-size: 14px;
}

.footer-links {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}

/* ============ RESPONSIVE ============ */
@media (max-width: 1100px) {
  .hero-grid,
  .architecture-layout,
  .split-highlight,
  .contact-shell,
  .grid-2 {
    grid-template-columns: 1fr;
  }

  .roadmap-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 900px) {
  .grid-3,
  .flow-grid,
  .contact-metrics {
    grid-template-columns: 1fr;
  }

  .map-row {
    grid-template-columns: 1fr;
  }

  /* Only ONE nav system visible on mobile: hide desktop links + secondary/primary
     buttons in the top bar, show only the hamburger. The primary CTA lives
     inside .mobile-panel to avoid duplicate buttons. */
  .nav-links,
  .nav-actions .btn-secondary,
  .nav-actions .btn-primary {
    display: none;
  }

  .menu-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }
}

@media (min-width: 901px) {
  /* On desktop, the mobile panel must never render, even if .open is toggled */
  .mobile-panel {
    display: none !important;
  }

  .menu-toggle {
    display: none !important;
  }
}

@media (max-width: 640px) {
  .container {
    width: min(var(--container), calc(100% - 32px));
  }

  .section,
  .hero {
    padding: 64px 0;
  }

  .hero-copy h1 {
    max-width: none;
  }

  .hero-panel,
  .card,
  .contact-shell {
    padding: 20px;
  }

  .roadmap-grid {
    grid-template-columns: 1fr;
  }

  .footer-row {
    align-items: flex-start;
    flex-direction: column;
  }
}