:root {
  --bg: #0a0d12;
  --surface: #10151d;
  --surface-alt: #141b25;
  --border: #212a37;
  --text: #e8edf5;
  --muted: #8a95a8;
  --accent: #4f8dff;
  --accent-dim: rgba(79, 141, 255, 0.12);
  --warm: #f5a623;
  --warm-dim: rgba(245, 166, 35, 0.12);
  --danger: #ef5350;
  --good: #34c789;

  --font-display: "Space Grotesk", "Inter", sans-serif;
  --font-body: "Inter", sans-serif;
  --font-mono: "IBM Plex Mono", "Consolas", monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.55;
}

a { color: inherit; }

code, pre { font-family: var(--font-mono); }

.disclaimer-bar {
  background: var(--warm-dim);
  color: var(--warm);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-align: center;
  padding: 0.5rem 1rem;
  border-bottom: 1px solid var(--border);
}

/* Nav */
.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(10, 13, 18, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0.9rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.wordmark {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.05rem;
  text-decoration: none;
  color: var(--text);
}
.wordmark-glyph {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 1.6rem;
  font-size: 0.85rem;
}
.nav-links a { text-decoration: none; color: var(--muted); transition: color 0.15s; }
.nav-links a:hover { color: var(--text); }
.nav-cta {
  border: 1px solid var(--border);
  padding: 0.35rem 0.75rem;
  border-radius: 6px;
  color: var(--text) !important;
}

/* Hero */
.hero {
  max-width: 1100px;
  margin: 0 auto;
  padding: 5rem 1.5rem 4rem;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 3.5rem;
  align-items: center;
}
.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 0.9rem;
}
h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.9rem);
  line-height: 1.12;
  margin: 0 0 1.2rem;
  letter-spacing: -0.01em;
}
.hero-sub {
  color: var(--muted);
  font-size: 1rem;
  max-width: 46ch;
  margin: 0 0 1.8rem;
}
.hero-actions { display: flex; gap: 0.75rem; margin-bottom: 1rem; }
.btn {
  display: inline-block;
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 500;
  padding: 0.65rem 1.15rem;
  border-radius: 7px;
  transition: opacity 0.15s, background 0.15s;
}
.btn-primary { background: var(--accent); color: #08101f; }
.btn-primary:hover { opacity: 0.88; }
.btn-ghost { border: 1px solid var(--border); color: var(--text); }
.btn-ghost:hover { background: var(--surface-alt); }
.hero-note { font-family: var(--font-mono); font-size: 0.75rem; color: var(--muted); margin: 0; }

/* Readout signature element */
.readout {
  position: relative;
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem;
}
.readout-scanline {
  position: absolute;
  left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0.7;
  animation: scan 4.5s ease-in-out infinite;
}
@keyframes scan {
  0% { top: 0%; }
  50% { top: 96%; }
  100% { top: 0%; }
}
.readout-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding-bottom: 0.9rem;
  margin-bottom: 0.9rem;
  border-bottom: 1px solid var(--border);
}
.readout-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  color: var(--muted);
}
.readout-value {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 600;
}
.readout-value--accent { color: var(--accent); }
.readout-value--warn { color: var(--warm); }
.readout-unit { font-size: 1rem; color: var(--muted); margin-left: 0.15rem; }
.readout-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin-bottom: 1rem;
}
.readout-cell {
  background: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.6rem 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}
.readout-status { font-size: 0.85rem; font-weight: 500; }
.readout-status--ok { color: var(--good); }
.readout-feed { display: flex; flex-direction: column; gap: 0.5rem; }
.readout-feed-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.78rem;
  color: var(--muted);
}
.dot { width: 6px; height: 6px; border-radius: 50%; flex-shrink: 0; }
.dot--info { background: var(--accent); }
.dot--warn { background: var(--warm); }
.readout-caption {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--muted);
  opacity: 0.7;
  margin: 0.9rem 0 0;
}

/* Sections */
.section {
  max-width: 1100px;
  margin: 0 auto;
  padding: 4.5rem 1.5rem;
}
.section--dark {
  max-width: none;
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.section--dark > * { max-width: 1100px; margin-left: auto; margin-right: auto; }
h2 {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 2.6vw, 2rem);
  margin: 0 0 2.2rem;
  letter-spacing: -0.01em;
}
.section-intro { color: var(--muted); max-width: 60ch; }

/* Feature grid */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}
.feature {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.4rem;
}
.feature h3 {
  font-family: var(--font-display);
  font-size: 1rem;
  margin: 0 0 0.5rem;
}
.feature p { color: var(--muted); font-size: 0.88rem; margin: 0; }

/* Boundary */
.boundary-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  align-items: start;
}
.never-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 0.75rem; }
.never-list li {
  position: relative;
  padding-left: 1.4rem;
  color: var(--text);
  font-size: 0.92rem;
}
.never-list li::before {
  content: "✕";
  position: absolute;
  left: 0;
  color: var(--danger);
  font-size: 0.8rem;
  top: 0.15rem;
}
.never-list code {
  background: var(--surface-alt);
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  font-size: 0.85em;
}
.boundary-flow {
  background: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.4rem;
}
.boundary-flow-label { font-size: 0.85rem; color: var(--muted); margin: 0 0 1rem; }
.flow-steps { display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem; margin-bottom: 0.9rem; }
.flow-step {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 0.4rem 0.6rem;
  border-radius: 6px;
  color: var(--accent);
}
.flow-arrow { color: var(--muted); font-size: 0.8rem; }
.boundary-flow-note { font-size: 0.78rem; color: var(--muted); margin: 0; }
.boundary-link { margin-top: 2rem; }
.boundary-link a { color: var(--accent); text-decoration: none; font-size: 0.9rem; }

/* Architecture diagram */
.arch-diagram {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 2rem;
}
.arch-layer {
  width: 100%;
  max-width: 480px;
  text-align: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}
.arch-arrow { color: var(--muted); font-family: var(--font-mono); font-size: 0.75rem; }
.arch-note { color: var(--muted); max-width: 60ch; font-size: 0.9rem; }
.arch-note a { color: var(--accent); text-decoration: none; }

/* Roadmap */
.roadmap { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 0.9rem; }
.roadmap-item {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  background: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.1rem 1.4rem;
}
.roadmap-item--done { border-color: rgba(52, 199, 137, 0.35); }
.roadmap-item--active { border-color: rgba(79, 141, 255, 0.4); }
.roadmap-index {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted);
  width: 1.6rem;
  flex-shrink: 0;
}
.roadmap-item h3 { font-family: var(--font-display); font-size: 0.95rem; margin: 0 0 0.25rem; }
.roadmap-item p { color: var(--muted); font-size: 0.85rem; margin: 0; }
.roadmap-status {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.25rem 0.65rem;
  white-space: nowrap;
}
.roadmap-status--done { color: var(--good); border-color: rgba(52, 199, 137, 0.35); }
.roadmap-status--active { color: var(--accent); border-color: rgba(79, 141, 255, 0.4); }

/* Code block */
.code-block {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.1rem 1.3rem;
  font-size: 0.85rem;
  overflow-x: auto;
  color: var(--accent);
  margin: 1.3rem 0;
}

/* Footer */
.footer {
  border-top: 1px solid var(--border);
  padding: 2.5rem 1.5rem 1.5rem;
}
.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 1.5rem;
}
.wordmark--footer { font-family: var(--font-display); font-weight: 600; }
.footer-note { color: var(--muted); font-size: 0.82rem; margin: 0.4rem 0 0; }
.footer-links { display: flex; gap: 1.3rem; font-size: 0.85rem; }
.footer-links a { text-decoration: none; color: var(--muted); }
.footer-links a:hover { color: var(--text); }
.footer-disclaimer {
  max-width: 1100px;
  margin: 2rem auto 0;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--muted);
  opacity: 0.75;
}

/* Responsive */
@media (max-width: 860px) {
  .hero { grid-template-columns: 1fr; padding-top: 3rem; }
  .feature-grid { grid-template-columns: 1fr 1fr; }
  .boundary-layout { grid-template-columns: 1fr; }
  .nav-links { display: none; }
}
@media (max-width: 560px) {
  .feature-grid { grid-template-columns: 1fr; }
  .readout-grid { grid-template-columns: 1fr 1fr; }
  .roadmap-item { flex-wrap: wrap; }
  .roadmap-status { margin-left: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .readout-scanline { animation: none; top: 0; }
  html { scroll-behavior: auto; }
}