:root {
  --ai-visual-height: 500px;
  --ai-reading-gap: 34px;
  --ai-diagnostic-min: 280px;
}

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

.ai-hero::before {
  position: absolute;
  inset: 0;
  pointer-events: none;
  content: "";
  background:
    radial-gradient(circle at 76% 34%, var(--color-accent-soft), transparent 34%),
    linear-gradient(var(--color-border) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-border) 1px, transparent 1px);
  background-size: auto, 48px 48px, 48px 48px;
  opacity: 0.28;
}

.ai-hero-grid {
  position: relative;
  display: grid;
  min-height: calc(100svh - var(--header-height));
  grid-template-columns: minmax(0, 0.88fr) minmax(460px, 1.12fr);
  align-items: center;
  gap: 54px;
}

.ai-hero-copy {
  position: relative;
  z-index: 2;
  min-width: 0;
}

.ai-hero-copy .eyebrow {
  margin-bottom: 22px;
  box-shadow: var(--shadow-chip);
}

.ai-hero-copy h1 {
  max-width: 9em;
}

.ai-hero-lead {
  max-width: 40em;
  margin-bottom: 28px;
  color: var(--color-muted);
  font-size: 18px;
}

.ai-fact-list {
  display: grid;
  gap: 12px;
  margin: 34px 0 0;
  padding: 22px 0 0;
  border-top: 1px dashed var(--color-border);
  list-style: none;
}

.ai-fact-list li {
  display: grid;
  grid-template-columns: minmax(156px, auto) minmax(0, 1fr);
  gap: 18px;
  color: var(--color-muted);
  font-size: 13px;
}

.ai-fact-list strong {
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: 13px;
}

.ai-route-visual {
  position: relative;
  height: var(--ai-visual-height);
  min-width: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background: var(--color-panel);
  box-shadow: var(--shadow-panel);
  color: var(--color-accent);
}

.ai-route-visual::before,
.ai-route-visual::after {
  position: absolute;
  pointer-events: none;
  content: "";
}

.ai-route-visual::before {
  inset: 28px;
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-lg);
}

.ai-route-visual::after {
  right: 28px;
  bottom: 28px;
  width: 46px;
  height: 18px;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.ai-route-visual > svg {
  position: absolute;
  inset: 32px 20px 18px;
  width: calc(100% - 40px);
  height: calc(100% - 50px);
}

.ai-contour {
  fill: none;
  stroke: var(--color-border);
  stroke-width: 1.4;
}

.ai-route-path {
  fill: none;
  stroke: var(--color-accent-line);
  stroke-linecap: round;
  stroke-width: 3;
}

.ai-route-path-dashed {
  stroke: var(--color-border);
  stroke-dasharray: 7 9;
  stroke-width: 2;
}

.ai-route-node {
  fill: var(--color-panel);
  stroke: var(--color-accent);
  stroke-width: 3;
}

.ai-route-label {
  position: absolute;
  z-index: 3;
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 7px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-panel);
  box-shadow: var(--shadow-chip);
  color: var(--color-text);
  font-size: 12px;
  white-space: nowrap;
}

.ai-route-label::before {
  width: 7px;
  height: 7px;
  margin-right: 7px;
  border-radius: 50%;
  content: "";
  background: var(--color-accent);
}

.ai-label-browser {
  top: 55%;
  left: 4%;
}

.ai-label-api {
  top: 63%;
  left: 48%;
}

.ai-label-ide {
  top: 33%;
  right: 3%;
}

.ai-balloon {
  position: absolute;
  z-index: 2;
  top: 5%;
  left: 48%;
  width: 116px;
  height: 174px;
  animation: ai-balloon-drift 6s ease-in-out infinite alternate;
}

.ai-balloon svg {
  width: 100%;
  height: 100%;
}

.ai-balloon-stop-light {
  stop-color: var(--color-accent-light);
}

.ai-balloon-stop-dark {
  stop-color: var(--color-accent-dark);
}

.ai-balloon-shell {
  fill: url("#ai-balloon-gradient");
}

.ai-balloon-glint {
  fill: none;
  stroke: var(--color-panel);
  stroke-linecap: round;
  stroke-width: 5;
  opacity: 0.34;
}

.ai-balloon-rope {
  fill: none;
  stroke: var(--color-accent-dark);
  stroke-width: 1.3;
}

.ai-balloon-cabin {
  fill: var(--color-panel-alt);
  stroke: var(--color-border);
  stroke-width: 1.4;
}

.ai-balloon-window {
  fill: var(--color-accent);
}

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

.ai-article > .wrap {
  padding-top: 28px;
}

.ai-article .toc-tabs {
  margin-bottom: 0;
}

.section-ai-alt {
  background: var(--color-panel-alt);
}

.ai-section-head {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(280px, 0.58fr);
  align-items: end;
  gap: 48px;
  margin-bottom: var(--ai-reading-gap);
}

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

.ai-section-head .eyebrow,
.ai-article .reading > .eyebrow {
  margin-bottom: 18px;
}

.ai-article .reading > p {
  color: var(--color-muted);
  font-size: 17px;
}

.ai-article .reading > p strong {
  color: var(--color-text);
}

.ai-article .table-scroll {
  box-shadow: var(--shadow-panel);
}

.ai-article .compare-table td:first-child {
  color: var(--color-accent-dark);
  font-weight: 680;
}

.ai-diagnostic-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(var(--ai-diagnostic-min), 1fr));
  gap: 18px;
}

.ai-diagnostic {
  position: relative;
  min-width: 0;
  padding: 28px 28px 26px 34px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-panel);
  box-shadow: var(--shadow-chip);
}

.ai-diagnostic::before {
  position: absolute;
  top: 30px;
  bottom: 30px;
  left: 18px;
  width: 3px;
  border-radius: var(--radius-pill);
  content: "";
  background: var(--color-accent);
}

.ai-diagnostic h3 {
  font-size: 21px;
}

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

.ai-end-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 28px;
  margin-top: 56px;
  padding: clamp(28px, 5vw, 48px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background: var(--color-panel-alt);
  box-shadow: var(--shadow-panel);
}

.ai-end-panel h2 {
  margin-bottom: 10px;
  font-size: clamp(28px, 4vw, 40px);
}

.ai-end-panel p {
  max-width: 43em;
  margin-bottom: 0;
  color: var(--color-muted);
}

.ai-end-panel .button-row {
  justify-content: flex-end;
}

@keyframes ai-balloon-drift {
  from {
    transform: translateY(0) rotate(-1deg);
  }

  to {
    transform: translateY(-10px) rotate(1deg);
  }
}

@media (max-width: 1160px) {
  .ai-hero-grid {
    min-height: auto;
    grid-template-columns: minmax(0, 1fr);
    padding-top: 66px;
    padding-bottom: 56px;
  }

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

  .ai-route-visual {
    height: 430px;
  }
}

@media (max-width: 768px) {
  :root {
    --ai-visual-height: 350px;
    --ai-diagnostic-min: 0px;
  }

  .ai-hero-grid {
    gap: 40px;
    padding-top: 48px;
    padding-bottom: 40px;
  }

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

  .ai-fact-list li {
    grid-template-columns: minmax(0, 1fr);
    gap: 2px;
  }

  .ai-route-visual {
    height: var(--ai-visual-height);
  }

  .ai-route-visual::before {
    inset: 18px;
  }

  .ai-balloon {
    left: 43%;
    transform: scale(0.82);
    transform-origin: top center;
  }

  .ai-route-label {
    min-height: 30px;
    padding: 5px 10px;
    font-size: 11px;
  }

  .ai-label-browser {
    top: 62%;
  }

  .ai-label-api {
    top: 70%;
    left: 43%;
  }

  .ai-label-ide {
    top: 39%;
  }

  .ai-section-head,
  .ai-end-panel {
    grid-template-columns: minmax(0, 1fr);
  }

  .ai-section-head {
    align-items: start;
    gap: 12px;
  }

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

  .ai-end-panel .button-row {
    justify-content: flex-start;
  }
}

@media (max-width: 480px) {
  .ai-route-visual {
    height: 310px;
    border-radius: var(--radius-lg);
  }

  .ai-route-visual > svg {
    inset: 24px 8px 12px;
    width: calc(100% - 16px);
    height: calc(100% - 36px);
  }

  .ai-balloon {
    top: 3%;
    left: 38%;
    transform: scale(0.68);
  }

  .ai-label-browser {
    top: 66%;
    left: 3%;
  }

  .ai-label-api {
    top: 74%;
    left: 40%;
  }

  .ai-label-ide {
    top: 43%;
    right: 2%;
  }

  .ai-diagnostic {
    padding: 24px 22px 22px 30px;
  }

  .ai-diagnostic::before {
    top: 26px;
    bottom: 26px;
    left: 15px;
  }
}

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