:root {
  --ai-hero-min-height: 680px;
  --ai-dossier-width: 500px;
  --ai-line-width: 76px;
  --ai-icon-size: 54px;
  --ai-mark-size: 88px;
  --ai-grid-gap: 18px;
}

.ai-hero {
  position: relative;
  min-height: var(--ai-hero-min-height);
  padding-top: clamp(64px, 8vw, 108px);
  padding-bottom: clamp(62px, 8vw, 96px);
  overflow-x: clip;
}

.ai-hero-glow {
  position: absolute;
  top: -22%;
  right: -12%;
  width: min(820px, 76vw);
  height: 720px;
  border-radius: var(--radius-pill);
  background: linear-gradient(132deg, var(--color-glow-warm), var(--color-glow-cool));
  filter: blur(70px);
  opacity: .74;
  pointer-events: none;
  animation: ai-glow-drift 10s ease-in-out infinite alternate;
}

@keyframes ai-glow-drift {
  from {
    transform: translate3d(0, 0, 0) scale(1);
    opacity: .64;
  }

  to {
    transform: translate3d(-3%, 2%, 0) scale(1.04);
    opacity: .8;
  }
}

.ai-hero-layout {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(380px, .92fr);
  align-items: center;
  gap: clamp(42px, 7vw, 92px);
}

.ai-hero-copy {
  min-width: 0;
}

.ai-hero-copy h1 {
  max-width: 700px;
  margin-top: 22px;
  margin-bottom: 20px;
}

.ai-hero-copy .lead {
  max-width: 720px;
}

.ai-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
  margin-bottom: 22px;
}

.ai-route-dossier {
  width: min(100%, var(--ai-dossier-width));
  justify-self: end;
  padding: 22px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  box-shadow: var(--shadow-raised);
  transform: rotate(.6deg);
}

.ai-dossier-head,
.ai-dossier-foot {
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .12em;
}

.ai-dossier-head {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding-bottom: 15px;
  border-bottom: 1px solid var(--color-line);
}

.ai-dossier-flow {
  display: grid;
  grid-template-columns: minmax(0, 1fr) var(--ai-line-width) minmax(0, 1fr);
  align-items: center;
  gap: 12px;
  padding-top: 32px;
  padding-bottom: 32px;
}

.ai-flow-source,
.ai-flow-gate {
  min-width: 0;
  text-align: center;
}

.ai-flow-source svg {
  width: var(--ai-icon-size);
  height: var(--ai-icon-size);
  margin: 0 auto 12px;
  fill: none;
  stroke: var(--color-link);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.ai-flow-source strong,
.ai-flow-gate strong {
  display: block;
  margin-top: 10px;
  color: var(--color-text);
  font-family: var(--font-display);
  font-weight: 850;
}

.ai-flow-source small,
.ai-flow-gate small {
  display: block;
  margin-top: 3px;
  color: var(--color-text-muted);
  font-size: 11px;
}

.ai-flow-line {
  position: relative;
  height: 1px;
  border-top: 1px dashed var(--color-accent);
}

.ai-flow-line::before,
.ai-flow-line::after,
.ai-flow-line span {
  position: absolute;
  top: 50%;
  width: 7px;
  height: 7px;
  border-radius: 2px;
  background: var(--color-accent);
  content: "";
  transform: translateY(-50%);
}

.ai-flow-line::before {
  left: 0;
}

.ai-flow-line span {
  left: 50%;
  transform: translate(-50%, -50%);
}

.ai-flow-line::after {
  right: 0;
}

.ai-tool-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-top: 18px;
  padding-bottom: 18px;
  border-top: 1px dashed var(--color-line);
  border-bottom: 1px dashed var(--color-line);
}

.ai-tool-strip span {
  min-width: 0;
  padding: 5px 9px;
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-xs);
  background: var(--color-page);
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 10px;
  text-overflow: ellipsis;
}

.ai-dossier-foot {
  padding-top: 15px;
  overflow-wrap: anywhere;
}

.ai-toc-wrap {
  position: relative;
  z-index: 20;
  margin-top: -24px;
}

.ai-article {
  min-width: 0;
}

.ai-section-muted {
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
  background: var(--color-surface-muted);
}

.ai-principle-list {
  display: grid;
  gap: 0;
  margin-bottom: 28px;
  border-top: 1px solid var(--color-line);
}

.ai-principle {
  display: grid;
  grid-template-columns: minmax(150px, .34fr) minmax(0, 1fr);
  gap: 26px;
  padding-top: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--color-line);
}

.ai-principle h3 {
  margin-bottom: 0;
  color: var(--color-accent);
  font-size: 20px;
}

.ai-principle p {
  margin-bottom: 0;
  color: var(--color-text-muted);
}

.ai-tool-table td:first-child {
  white-space: nowrap;
}

.ai-tool-table strong {
  font-family: var(--font-display);
}

.ai-copy-stack {
  display: grid;
  gap: 18px;
  margin-bottom: 28px;
}

.ai-copy-stack p {
  margin-bottom: 0;
  color: var(--color-text-muted);
  font-size: 16px;
}

.ai-mode-grid {
  margin-bottom: 26px;
}

.ai-mode-grid .panel {
  position: relative;
}

.ai-mode-grid h3 {
  margin-top: 18px;
  margin-bottom: 14px;
}

.ai-mode-grid p {
  color: var(--color-text-muted);
}

.ai-check-list {
  margin-bottom: 0;
  padding-left: 0;
  list-style: none;
}

.ai-check-list li {
  position: relative;
  padding: 8px 0 8px 20px;
  border-top: 1px solid var(--color-line);
  color: var(--color-text-muted);
}

.ai-check-list li::before {
  position: absolute;
  top: 18px;
  left: 1px;
  width: 7px;
  height: 7px;
  border-radius: 2px;
  background: var(--color-accent);
  content: "";
}

.ai-dev-rows {
  display: grid;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  box-shadow: var(--shadow-panel);
}

.ai-dev-rows article {
  display: grid;
  grid-template-columns: minmax(150px, .3fr) minmax(0, 1fr);
  gap: 28px;
  padding: clamp(22px, 3vw, 30px);
  border-bottom: 1px solid var(--color-line);
}

.ai-dev-rows article:last-child {
  border-bottom: 0;
}

.ai-dev-rows h3 {
  margin-bottom: 0;
  font-size: 20px;
}

.ai-dev-rows p {
  margin-bottom: 0;
  color: var(--color-text-muted);
}

.ai-failure-list {
  max-width: var(--reading-width);
}

.ai-selection-sheet {
  display: grid;
  grid-template-columns: var(--ai-mark-size) minmax(0, 1fr);
  gap: 28px;
  margin-bottom: 28px;
  padding: clamp(24px, 4vw, 38px);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  box-shadow: var(--shadow-panel);
}

.ai-selection-mark {
  display: flex;
  width: var(--ai-mark-size);
  height: var(--ai-mark-size);
  flex-shrink: 0;
  align-items: center;
  justify-content: center;
  border: 3px double var(--color-accent);
  border-radius: var(--radius-pill);
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 850;
  line-height: 1.25;
  text-align: center;
  transform: rotate(-6deg);
}

.ai-selection-sheet p {
  color: var(--color-text-muted);
}

.ai-selection-sheet strong {
  color: var(--color-text);
}

.ai-end-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

@media (max-width: 960px) {
  .ai-hero-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .ai-route-dossier {
    width: min(100%, 680px);
    justify-self: start;
    transform: none;
  }
}

@media (max-width: 768px) {
  :root {
    --ai-hero-min-height: auto;
    --ai-line-width: 44px;
    --ai-mark-size: 74px;
  }

  .ai-hero {
    padding-top: 44px;
  }

  .ai-hero-glow {
    top: -12%;
    right: -55%;
    width: 140vw;
    height: 560px;
    filter: blur(54px);
  }

  .ai-principle,
  .ai-dev-rows article {
    grid-template-columns: minmax(0, 1fr);
    gap: 10px;
  }

  .ai-selection-sheet {
    grid-template-columns: minmax(0, 1fr);
  }

  .ai-selection-mark {
    transform: none;
  }
}

@media (max-width: 640px) {
  .ai-hero-actions,
  .ai-end-actions {
    flex-direction: column;
  }

  .ai-route-dossier {
    padding: 16px;
  }

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

  .ai-flow-line {
    width: 1px;
    height: 42px;
    margin-inline: auto;
    border-top: 0;
    border-left: 1px dashed var(--color-accent);
  }

  .ai-flow-line::before,
  .ai-flow-line::after,
  .ai-flow-line span {
    left: 50%;
  }

  .ai-flow-line::before {
    top: 0;
    transform: translate(-50%, -50%);
  }

  .ai-flow-line span {
    top: 50%;
  }

  .ai-flow-line::after {
    top: auto;
    right: auto;
    bottom: 0;
    transform: translate(-50%, 50%);
  }

  .ai-dossier-head {
    flex-wrap: wrap;
  }

  .ai-toc-wrap {
    margin-top: -12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .ai-hero-glow {
    animation: none;
  }
}