.ai-hero {
  position: relative;
  min-width: 0;
  overflow-x: clip;
  border-bottom: 1px solid var(--color-border);
}

.ai-hero-grid {
  display: grid;
  min-height: calc(100svh - var(--header-height));
  grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
  align-items: center;
  gap: 68px;
  padding-top: 64px;
  padding-bottom: 72px;
}

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

.ai-hero-copy h1 {
  max-width: 760px;
  margin-top: 22px;
  font-size: clamp(52px, 4.8vw, 64px);
}

.ai-hero-lede {
  max-width: 660px;
  margin-bottom: 28px;
  color: var(--color-text-muted);
  font-size: 17px;
  line-height: 1.8;
}

.ai-fact-line {
  display: flex;
  min-width: 0;
  flex-wrap: wrap;
  gap: 9px;
}

.ai-workbench {
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-panel);
  box-shadow: var(--shadow-panel), 0 0 0 1px var(--color-accent-glow-soft) inset;
  transform-style: preserve-3d;
}

.ai-workbench-body {
  position: relative;
  display: grid;
  min-height: 440px;
  grid-template-columns: 126px minmax(0, 1fr);
  overflow: hidden;
  background-image: radial-gradient(circle, var(--color-dot-canvas) 1px, transparent 1px);
  background-size: 20px 20px;
}

.ai-tool-column {
  position: relative;
  z-index: 2;
  display: flex;
  min-width: 0;
  flex-direction: column;
  gap: 12px;
  padding: 28px 16px;
  border-right: 1px solid var(--color-border);
  background: var(--color-panel);
}

.ai-console-label {
  margin-bottom: 5px;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
}

.ai-tool-token {
  display: flex;
  min-width: 0;
  min-height: 46px;
  align-items: center;
  gap: 8px;
  padding: 9px 10px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-panel-raised);
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 10px;
}

.ai-tool-token.is-active {
  border-color: var(--color-accent-line);
  color: var(--color-text);
  box-shadow: 0 0 16px var(--color-accent-glow-soft);
}

.ai-route-diagram {
  position: relative;
  min-width: 0;
  min-height: 360px;
}

.ai-route-diagram svg {
  position: absolute;
  inset: 26px 14px auto;
  width: calc(100% - 28px);
  height: 300px;
  color: var(--color-accent-line);
}

.ai-route-diagram path {
  stroke-width: 1.2;
}

.ai-router-core {
  position: absolute;
  z-index: 2;
  top: 50%;
  left: 50%;
  display: flex;
  width: 104px;
  height: 104px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  border: 1px solid var(--color-accent-line);
  border-radius: 50%;
  background: var(--color-panel-raised);
  box-shadow: 0 0 30px var(--color-accent-glow-soft);
  transform: translate(-50%, -50%);
}

.ai-router-core strong {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
}

.ai-router-core small {
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: 8px;
}

.ai-router-dot {
  width: 7px;
  height: 7px;
  margin-bottom: 9px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 12px var(--color-accent-glow);
}

.ai-endpoint {
  position: absolute;
  right: 16px;
  display: inline-flex;
  min-width: 62px;
  min-height: 28px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xs);
  background: var(--color-panel-raised);
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.1em;
}

.ai-endpoint-top {
  top: 40px;
}

.ai-endpoint-upper {
  top: 114px;
}

.ai-endpoint-lower {
  top: 190px;
}

.ai-endpoint-bottom {
  top: 246px;
}

.ai-console-foot {
  position: absolute;
  z-index: 3;
  right: 0;
  bottom: 0;
  left: 126px;
  display: flex;
  min-width: 0;
  flex-wrap: wrap;
  gap: 8px 18px;
  padding: 16px 18px;
  border-top: 1px solid var(--color-border);
  background: var(--color-panel);
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 9px;
}

.ai-console-foot span {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.ai-console-foot span::before {
  width: 5px;
  height: 5px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--color-success);
  content: "";
}

.ai-document {
  width: 100%;
  max-width: var(--content-width);
  margin-inline: auto;
  padding: 72px var(--gutter) var(--section-space);
}

.ai-section {
  min-width: 0;
  padding-top: 76px;
  padding-bottom: 76px;
  border-bottom: 1px solid var(--color-border);
  scroll-margin-top: var(--toc-offset);
}

.ai-section:last-child {
  border-bottom: 0;
}

.ai-section .section-head {
  max-width: 820px;
}

.ai-explain-grid {
  display: grid;
  min-width: 0;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 0.34fr);
  align-items: start;
  gap: 34px;
}

.ai-explain-main {
  max-width: 820px;
  color: var(--color-text-muted);
}

.ai-explain-main p + p {
  margin-top: 20px;
}

.ai-tool-list {
  display: grid;
  min-width: 0;
  gap: 12px;
}

.ai-tool-entry {
  display: grid;
  min-width: 0;
  grid-template-columns: minmax(190px, 0.3fr) minmax(0, 1fr);
  gap: 30px;
  padding: 28px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-panel);
}

.ai-tool-entry:nth-child(even) {
  background: var(--color-panel-raised);
}

.ai-tool-entry p {
  color: var(--color-text-muted);
}

.ai-tool-entry p + p {
  margin-top: 14px;
}

.ai-tool-heading h3 {
  margin-top: 14px;
  font-size: 24px;
}

.ai-step-list {
  display: grid;
  max-width: 940px;
  gap: 16px;
}

.ai-step {
  display: grid;
  min-width: 0;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 18px;
  padding: 24px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-panel);
}

.ai-step-mark {
  display: inline-flex;
  width: 38px;
  height: 38px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-accent-line);
  border-radius: var(--radius-sm);
  background: var(--color-panel-raised);
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 12px;
}

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

.ai-callout {
  max-width: 940px;
  margin-top: 24px;
}

.ai-compare-panes {
  display: grid;
  min-width: 0;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.ai-compare-panes h3 {
  margin-top: 18px;
}

.ai-compare-panes p {
  color: var(--color-text-muted);
}

.ai-compare-panes p + p {
  margin-top: 16px;
}

.ai-dev-grid {
  display: grid;
  min-width: 0;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.ai-dev-card {
  min-width: 0;
  padding: 26px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-panel);
  box-shadow: var(--shadow-card);
}

.ai-dev-card:nth-child(2) {
  background: var(--color-panel-raised);
}

.ai-dev-index {
  display: inline-flex;
  min-height: 27px;
  align-items: center;
  padding: 3px 9px;
  border: 1px solid var(--color-accent-line);
  border-radius: var(--radius-xs);
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
}

.ai-dev-card h3 {
  margin-top: 18px;
}

.ai-dev-card p,
.ai-dev-card li {
  color: var(--color-text-muted);
  font-size: 14px;
}

.ai-dev-card ul {
  margin-top: 18px;
}

.ai-selection-layout {
  display: grid;
  min-width: 0;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 0.38fr);
  align-items: start;
  gap: 34px;
}

.ai-selection-copy {
  max-width: 800px;
  color: var(--color-text-muted);
}

.ai-selection-copy p + p {
  margin-top: 20px;
}

.ai-route-actions {
  padding: 28px;
  border: 1px solid var(--color-accent-line);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(circle at top right, var(--color-accent-glow-soft), transparent 42%),
    var(--color-panel);
  box-shadow: var(--shadow-card);
}

.ai-route-actions h3 {
  margin-top: 18px;
}

.ai-route-actions > p {
  color: var(--color-text-muted);
}

.ai-link-stack {
  display: grid;
  gap: 10px;
  margin-top: 24px;
}

.ai-route-note {
  margin-top: 20px;
  padding-top: 18px;
  border-top: 1px dashed var(--color-border);
  font-family: var(--font-mono);
  font-size: 11px;
}

@media (max-width: 1040px) {
  .ai-hero-grid {
    grid-template-columns: 1fr;
    min-height: auto;
    gap: 48px;
  }

  .ai-explain-grid,
  .ai-selection-layout {
    grid-template-columns: 1fr;
  }

  .ai-dev-grid {
    grid-template-columns: 1fr;
  }

  .ai-dev-card {
    max-width: none;
  }
}

@media (max-width: 820px) {
  .ai-tool-entry {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .ai-compare-panes {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .ai-hero-grid {
    padding-top: 48px;
    padding-bottom: 58px;
  }

  .ai-hero-copy h1 {
    font-size: clamp(28px, 9vw, 40px);
  }

  .ai-hero-lede {
    font-size: 16px;
  }

  .ai-document {
    padding-top: 56px;
  }

  .ai-section {
    padding-top: 62px;
    padding-bottom: 62px;
  }
}

@media (max-width: 640px) {
  .ai-workbench-body {
    min-height: 390px;
    grid-template-columns: 1fr;
  }

  .ai-tool-column {
    display: none;
  }

  .ai-route-diagram {
    min-height: 330px;
  }

  .ai-console-foot {
    left: 0;
  }

  .ai-tool-entry,
  .ai-step,
  .ai-dev-card,
  .ai-route-actions {
    padding: 20px;
  }

  .ai-step {
    grid-template-columns: 1fr;
  }

  .ai-step-mark {
    width: 34px;
    height: 34px;
  }

  .ai-endpoint {
    right: 8px;
    min-width: 54px;
  }
}

@media (max-width: 380px) {
  .ai-router-core {
    width: 90px;
    height: 90px;
  }

  .ai-endpoint {
    min-width: 48px;
    font-size: 8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .ai-workbench {
    transform: none;
  }
}