:root {
  --color-bg-base: #0b0f14;
  --color-bg-elevated: #121821;
  --color-bg-subtle: #1a2332;
  --color-primary: #3b82f6;
  --color-primary-hover: #2563eb;
  --color-primary-muted: rgba(59, 130, 246, 0.15);
  --color-accent-signal: #22d3ee;
  --color-accent-signal-muted: rgba(34, 211, 238, 0.12);
  --color-text-primary: #e5e7eb;
  --color-text-secondary: #94a3b8;
  --color-text-muted: #64748b;
  --color-border: rgba(255, 255, 255, 0.08);
  --color-border-strong: rgba(255, 255, 255, 0.14);
  --color-success: #10b981;
  --color-light-bg: #f8fafc;
  --color-light-text: #0f172a;
  --color-light-secondary: #475569;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --font-sans: "Inter", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;
  --max-width: 1120px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text-primary);
  background: var(--color-bg-base);
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  display: block;
}

.container {
  width: min(100% - 2rem, var(--max-width));
  margin-inline: auto;
}

/* Nav */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--color-border);
  background: rgba(11, 15, 20, 0.85);
  backdrop-filter: blur(12px);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 700;
  font-size: 1.125rem;
  letter-spacing: -0.02em;
}

.logo-mark-wrap {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  flex-shrink: 0;
  overflow: hidden;
  background: #000;
  filter: drop-shadow(0 0 10px rgba(34, 211, 238, 0.2));
  animation: logoGlow 3s ease-in-out infinite;
}

.logo-mark {
  width: 32px;
  height: 32px;
  display: block;
  object-fit: cover;
  border-radius: 8px;
  background: #000;
}

@keyframes logoGlow {
  0%,
  100% {
    filter: drop-shadow(0 0 8px rgba(34, 211, 238, 0.15));
  }
  50% {
    filter: drop-shadow(0 0 18px rgba(34, 211, 238, 0.4));
  }
}

.nav-links {
  display: none;
  gap: 1.5rem;
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
}

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

@media (min-width: 768px) {
  .nav-links {
    display: flex;
  }
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  flex-shrink: 0;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.625rem 1.125rem;
  border-radius: var(--radius-md);
  font-size: 0.9375rem;
  font-weight: 500;
  border: 1px solid transparent;
  transition: background 0.15s, border-color 0.15s, transform 0.15s;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}

.btn-primary:hover {
  background: var(--color-primary-hover);
}

.btn-secondary {
  background: transparent;
  border-color: var(--color-border-strong);
  color: var(--color-text-primary);
}

.btn-secondary:hover {
  background: var(--color-bg-subtle);
}

/* Hero */
.hero {
  position: relative;
  padding: 5rem 0 4rem;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(59, 130, 246, 0.15), transparent),
    radial-gradient(ellipse 60% 40% at 80% 60%, rgba(34, 211, 238, 0.08), transparent),
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: auto, auto, 48px 48px, 48px 48px;
  pointer-events: none;
  animation: heroGridShift 20s linear infinite;
}

@keyframes heroGridShift {
  0% {
    background-position: 0 0, 0 0, 0 0, 0 0;
  }
  100% {
    background-position: 0 0, 0 0, 48px 48px, 48px 48px;
  }
}

.hero-grid {
  position: relative;
  display: grid;
  gap: 3rem;
  align-items: center;
}

@media (min-width: 960px) {
  .hero-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  font-size: 0.8125rem;
  color: var(--color-accent-signal);
  background: var(--color-accent-signal-muted);
  border: 1px solid rgba(34, 211, 238, 0.2);
  margin-bottom: 1.25rem;
}

.hero-badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent-signal);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.4;
  }
}

h1 {
  margin: 0 0 1rem;
  font-size: clamp(2.25rem, 5vw, 3.25rem);
  line-height: 1.15;
  letter-spacing: -0.03em;
  font-weight: 700;
}

.hero-lead {
  margin: 0 0 1.75rem;
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  max-width: 32rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.hero-copy {
  position: relative;
  z-index: 1;
}

.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem 2rem;
  margin-bottom: 1.75rem;
  padding: 1rem 0;
  border-block: 1px solid var(--color-border);
}

.hero-stat {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.hero-stat-value {
  font-size: 1.375rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}

.hero-stat-live {
  color: var(--color-accent-signal);
  animation: statPulse 2.5s ease-in-out infinite;
}

@keyframes statPulse {
  0%,
  100% {
    opacity: 1;
    text-shadow: none;
  }
  50% {
    opacity: 0.85;
    text-shadow: 0 0 12px rgba(34, 211, 238, 0.45);
  }
}

.hero-stat-label {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* Hero flow diagram (LangSmith-style) */
.hero-flow {
  position: relative;
  z-index: 1;
}

.hero-flow-chrome {
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow:
    0 12px 40px rgba(0, 0, 0, 0.5),
    0 0 0 1px rgba(255, 255, 255, 0.04) inset;
}

.hero-flow-toolbar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 1rem;
  border-bottom: 1px solid var(--color-border);
  background: rgba(0, 0, 0, 0.25);
}

.hero-flow-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

.hero-flow-dot--red {
  background: #ef4444;
  opacity: 0.85;
}

.hero-flow-dot--amber {
  background: #f59e0b;
  opacity: 0.85;
}

.hero-flow-dot--green {
  background: #10b981;
  opacity: 0.85;
  animation: pulse 2s ease-in-out infinite;
}

.hero-flow-toolbar-title {
  margin-left: 0.35rem;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-text-secondary);
}

.hero-flow-status {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-accent-signal);
}

.hero-flow-status-pulse {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent-signal);
  animation: pulse 2s ease-in-out infinite;
}

.hero-flow-body {
  position: relative;
  padding: 0.75rem 1rem 0.75rem;
  min-height: 340px;
}

.hero-flow-caption {
  margin: 0 0 0.5rem;
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
}

.hero-flow-svg {
  width: 100%;
  height: auto;
  display: block;
  overflow: visible;
}

.flow-particles {
  pointer-events: none;
}

.flow-particle {
  opacity: 0.95;
  animation: particleGlow 1.8s ease-in-out infinite;
}

.flow-particle--source {
  animation-duration: 2.2s;
}

.flow-particle--lake {
  animation-duration: 2.4s;
}

.flow-particle--secondary {
  animation-duration: 2.8s;
}

@keyframes particleGlow {
  0%,
  100% {
    opacity: 0.75;
  }
  50% {
    opacity: 1;
  }
}

.flow-node-box {
  transition: stroke 0.2s, fill 0.2s;
}

.flow-node-label {
  text-anchor: middle;
}

.flow-node-num {
  text-anchor: middle;
}

.flow-node-hint {
  text-anchor: middle;
}

.flow-source-label {
  text-anchor: middle;
}

.flow-feed {
  list-style: none;
  margin: 0;
  padding: 0.75rem 0 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  border-top: 1px solid var(--color-border);
}

.flow-feed-item {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 0.65rem;
  padding: 0.5rem 0.65rem;
  background: var(--color-bg-subtle);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 0.75rem;
  opacity: 1;
  transform: translateX(0);
  animation: feedHighlight 12s ease-in-out infinite;
}

.flow-feed-item--1 {
  animation-delay: 0s;
}

.flow-feed-item--2 {
  animation-delay: 2s;
}

.flow-feed-item--3 {
  animation-delay: 4s;
}

.flow-feed-item--4 {
  animation-delay: 6s;
}

.flow-feed-item--5 {
  animation-delay: 8s;
}

@keyframes feedHighlight {
  0%,
  6%,
  100% {
    border-color: var(--color-border);
    background: var(--color-bg-subtle);
    box-shadow: none;
  }
  3% {
    border-color: rgba(34, 211, 238, 0.45);
    background: rgba(34, 211, 238, 0.06);
    box-shadow: 0 0 12px rgba(34, 211, 238, 0.08);
  }
}

.flow-feed-type {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  font-weight: 500;
  padding: 0.15rem 0.35rem;
  border-radius: 4px;
  letter-spacing: 0.04em;
}

.flow-feed-type--ingest {
  color: #94a3b8;
  background: rgba(148, 163, 184, 0.15);
}

.flow-feed-type--validate {
  color: var(--color-primary);
  background: var(--color-primary-muted);
}

.flow-feed-type--graph {
  color: var(--color-accent-signal);
  background: var(--color-accent-signal-muted);
}

.flow-feed-type--analyze {
  color: #a78bfa;
  background: rgba(167, 139, 250, 0.15);
}

.flow-feed-type--act {
  color: #f59e0b;
  background: rgba(245, 158, 11, 0.15);
}

.flow-feed-text {
  color: var(--color-text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.flow-feed-time {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  color: var(--color-text-muted);
}

@media (prefers-reduced-motion: reduce) {
  .flow-particle,
  .flow-feed-item,
  .hero-badge-dot,
  .hero-flow-status-pulse,
  .hero-flow-dot--green,
  .hero-stat-live,
  .logo-mark-wrap,
  .hero::before,
  .hero-flow-svg .flow-path,
  .hero-flow-svg .flow-node--active .flow-node-box,
  .hero-flow-svg .flow-node--alert .flow-node-box {
    animation: none;
  }
}

/* Trust strip */
.trust {
  border-block: 1px solid var(--color-border);
  background: var(--color-bg-elevated);
  padding: 1.25rem 0;
}

.trust-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.5rem 2.5rem;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.trust-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-success);
}

/* Sections */
.section {
  padding: 5rem 0;
}

.section-header {
  text-align: center;
  max-width: 40rem;
  margin: 0 auto 3rem;
}

.section-label {
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent-signal);
  margin-bottom: 0.75rem;
}

h2 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  letter-spacing: -0.02em;
  font-weight: 600;
}

.section-desc {
  margin: 0;
  color: var(--color-text-secondary);
}

/* Feature cards */
.features-grid {
  display: grid;
  gap: 1.25rem;
}

@media (min-width: 640px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 960px) {
  .features-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.feature-card {
  padding: 1.5rem;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: border-color 0.15s, transform 0.15s;
}

.feature-card:hover {
  border-color: var(--color-border-strong);
  transform: translateY(-2px);
}

.feature-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.125rem;
  margin-bottom: 1rem;
  background: var(--color-primary-muted);
  color: var(--color-primary);
}

.feature-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1rem;
  font-weight: 600;
}

.feature-card p {
  margin: 0;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

/* How it works */
.section-how {
  border-block: 1px solid var(--color-border);
  background: var(--color-bg-elevated);
}

.how-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
  counter-reset: how;
}

@media (min-width: 768px) {
  .how-steps {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1100px) {
  .how-steps {
    grid-template-columns: repeat(4, 1fr);
  }
}

.how-step {
  padding: 1.5rem;
  background: var(--color-bg-subtle);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.how-step-num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-accent-signal);
  margin-bottom: 0.75rem;
}

.how-step h3 {
  margin: 0 0 0.5rem;
  font-size: 1rem;
  font-weight: 600;
}

.how-step p {
  margin: 0;
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  line-height: 1.55;
}

/* Use cases */
.section-alt {
  background: linear-gradient(180deg, var(--color-bg-base) 0%, rgba(11, 15, 20, 0) 100%);
}

.usecase-grid {
  display: grid;
  gap: 1.25rem;
}

@media (min-width: 640px) {
  .usecase-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.usecase-card {
  padding: 1.5rem;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: border-color 0.15s;
}

.usecase-card:hover {
  border-color: var(--color-border-strong);
}

.usecase-tag {
  margin: 0 0 0.65rem;
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-accent-signal);
}

.usecase-card h3 {
  margin: 0 0 0.65rem;
  font-size: 1.0625rem;
  font-weight: 600;
}

.usecase-question {
  margin: 0 0 0.75rem;
  padding: 0.65rem 0.75rem;
  font-size: 0.8125rem;
  font-style: italic;
  color: var(--color-text-primary);
  background: rgba(34, 211, 238, 0.06);
  border-left: 2px solid var(--color-accent-signal);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  line-height: 1.45;
}

.usecase-card > p:last-child {
  margin: 0;
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

/* Ontology */
.ontology-layout {
  display: grid;
  gap: 1.25rem;
}

@media (min-width: 960px) {
  .ontology-layout {
    grid-template-columns: 1fr 1.2fr;
    grid-template-rows: auto auto;
  }

  .ontology-sources {
    grid-column: 1 / -1;
  }
}

.ontology-objects,
.ontology-relations,
.ontology-sources {
  padding: 1.5rem;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.ontology-subtitle {
  margin: 0 0 1rem;
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
}

.ontology-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.5rem;
}

.ontology-list li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9375rem;
  font-weight: 500;
}

.ontology-icon {
  color: var(--color-primary);
  font-size: 0.625rem;
}

.ontology-rel-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.ontology-rel-list li {
  display: flex;
  align-items: baseline;
  gap: 0.65rem;
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
}

.ontology-rel-list code {
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  padding: 0.2rem 0.4rem;
  color: var(--color-accent-signal);
  background: var(--color-accent-signal-muted);
  border-radius: 4px;
}

.source-grid {
  display: grid;
  gap: 0.65rem;
}

@media (min-width: 640px) {
  .source-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 960px) {
  .source-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.source-item {
  padding: 0.75rem 0.9rem;
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  background: var(--color-bg-subtle);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  line-height: 1.45;
}

.source-item strong {
  display: block;
  margin-bottom: 0.15rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-primary);
}

/* Governance */
.section-governance {
  border-block: 1px solid var(--color-border);
  background:
    radial-gradient(ellipse 60% 50% at 50% 0%, rgba(59, 130, 246, 0.08), transparent),
    var(--color-bg-elevated);
}

.governance-grid {
  display: grid;
  gap: 1rem;
}

@media (min-width: 640px) {
  .governance-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.governance-card {
  padding: 1.5rem;
  background: var(--color-bg-subtle);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.governance-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1rem;
  font-weight: 600;
}

.governance-card p {
  margin: 0;
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  line-height: 1.55;
}

.governance-card code {
  font-family: var(--font-mono);
  font-size: 0.75em;
  color: var(--color-accent-signal);
}

/* Rollout phases */
.rollout-phases {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

@media (min-width: 768px) {
  .rollout-phases {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1100px) {
  .rollout-phases {
    grid-template-columns: repeat(4, 1fr);
  }
}

.rollout-phase {
  padding: 1.5rem;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.rollout-phase--active {
  border-color: rgba(59, 130, 246, 0.45);
  background: rgba(59, 130, 246, 0.06);
  box-shadow: 0 0 0 1px rgba(59, 130, 246, 0.12) inset;
}

.rollout-phase-label {
  display: inline-block;
  margin-bottom: 0.65rem;
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
}

.rollout-phase--active .rollout-phase-label {
  color: var(--color-primary);
}

.rollout-phase h3 {
  margin: 0 0 0.5rem;
  font-size: 1rem;
  font-weight: 600;
}

.rollout-phase > p {
  margin: 0 0 1rem;
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

.rollout-tags {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.rollout-tags li {
  padding: 0.2rem 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.625rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  background: var(--color-bg-subtle);
  border: 1px solid var(--color-border);
  border-radius: 4px;
}

.rollout-phase--active .rollout-tags li {
  color: var(--color-primary);
  border-color: rgba(59, 130, 246, 0.25);
  background: rgba(59, 130, 246, 0.08);
}

/* Architecture (light section) */
.section-light {
  background: var(--color-light-bg);
  color: var(--color-light-text);
}

.section-light .section-desc {
  color: var(--color-light-secondary);
}

.arch-grid {
  display: grid;
  gap: 1rem;
}

@media (min-width: 768px) {
  .arch-grid {
    grid-template-columns: repeat(5, 1fr);
  }
}

.arch-step {
  padding: 1.25rem;
  background: #fff;
  border: 1px solid #e2e8f0;
  border-radius: var(--radius-lg);
  text-align: center;
}

.arch-num {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
}

.arch-step h3 {
  margin: 0 0 0.35rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-light-text);
}

.arch-step p {
  margin: 0;
  font-size: 0.75rem;
  color: var(--color-light-secondary);
  line-height: 1.4;
}

/* Layer 1 foundation (architecture detail) */
.layer-foundation {
  margin-top: 3rem;
  padding: 2rem;
  background: #fff;
  border: 1px solid #e2e8f0;
  border-radius: var(--radius-xl);
}

.layer-foundation-header {
  max-width: 40rem;
  margin-bottom: 1.5rem;
}

.layer-foundation-label {
  margin: 0 0 0.5rem;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary);
}

.layer-foundation-title {
  margin: 0 0 0.75rem;
  font-size: 1.375rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--color-light-text);
}

.layer-foundation-desc {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--color-light-secondary);
  line-height: 1.55;
}

.layer-sources {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.layer-source-chip {
  padding: 0.3rem 0.65rem;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-light-secondary);
  background: #f1f5f9;
  border: 1px solid #e2e8f0;
  border-radius: 999px;
}

.layer-pipeline {
  list-style: none;
  margin: 0 0 1.5rem;
  padding: 0;
  display: grid;
  gap: 0.65rem;
}

@media (min-width: 768px) {
  .layer-pipeline {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1100px) {
  .layer-pipeline {
    grid-template-columns: repeat(3, 1fr);
  }
}

.layer-stage {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-rows: auto auto;
  gap: 0.15rem 0.75rem;
  padding: 1rem 1.1rem;
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: var(--radius-lg);
}

.layer-stage-num {
  grid-row: 1 / span 2;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 1.75rem;
  height: 1.75rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-primary);
  background: rgba(59, 130, 246, 0.1);
  border-radius: 6px;
}

.layer-stage strong {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-light-text);
}

.layer-stage span:last-child {
  grid-column: 2;
  font-size: 0.75rem;
  color: var(--color-light-secondary);
  line-height: 1.4;
}

.layer-stage--output {
  background: rgba(59, 130, 246, 0.06);
  border-color: rgba(59, 130, 246, 0.25);
}

.layer-stage--output .layer-stage-num {
  color: #fff;
  background: var(--color-primary);
}

.layer-zones {
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.layer-zone {
  flex: 1 1 140px;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  padding: 1rem;
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: var(--radius-lg);
}

.layer-zone--ready {
  background: rgba(16, 185, 129, 0.06);
  border-color: rgba(16, 185, 129, 0.3);
}

.layer-zone-path {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  color: var(--color-primary);
}

.layer-zone-name {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-light-text);
}

.layer-zone-desc {
  font-size: 0.75rem;
  color: var(--color-light-secondary);
}

.layer-zone-arrow {
  display: flex;
  align-items: center;
  font-size: 1.125rem;
  color: #94a3b8;
  padding: 0 0.15rem;
}

.layer-handoff {
  margin: 0;
  padding: 1rem 1.1rem;
  font-size: 0.8125rem;
  color: var(--color-light-secondary);
  line-height: 1.5;
  background: #f1f5f9;
  border-radius: var(--radius-md);
  border-left: 3px solid var(--color-primary);
}

.layer-handoff strong {
  color: var(--color-light-text);
}

/* Code block */
.code-block {
  margin-top: 2rem;
  padding: 1.25rem;
  background: var(--color-bg-base);
  border-radius: var(--radius-lg);
  overflow-x: auto;
}

.code-block pre {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--color-text-secondary);
}

.code-block .comment {
  color: var(--color-text-muted);
}

.code-block .key {
  color: var(--color-accent-signal);
}

/* CTA */
.cta {
  padding: 5rem 0;
  text-align: center;
}

.cta-box {
  padding: 3rem 2rem;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
}

.cta-box h2 {
  margin-bottom: 0.75rem;
}

.cta-box p {
  margin: 0 0 1.5rem;
  color: var(--color-text-secondary);
}

.cta-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
}

/* Footer */
.footer {
  border-top: 1px solid var(--color-border);
  padding: 2rem 0;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: center;
  text-align: center;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.5rem;
}

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