.ai-hero {
  position: relative;
  min-height: calc(820px - var(--nav-height));
  overflow: hidden;
  isolation: isolate;
}

.ai-hero::before {
  position: absolute;
  z-index: -2;
  inset: 0;
  background:
    radial-gradient(circle at 78% 40%, var(--color-accent-soft), transparent 34%),
    linear-gradient(180deg, transparent, var(--color-bg));
  content: "";
  pointer-events: none;
}

.ai-hero::after {
  position: absolute;
  z-index: -1;
  right: -12%;
  bottom: 2%;
  width: 58%;
  height: 64%;
  opacity: .42;
  background-image:
    linear-gradient(var(--color-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-line) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: linear-gradient(180deg, transparent, var(--color-bg), transparent);
  content: "";
  pointer-events: none;
  transform: perspective(620px) rotateX(58deg) rotateZ(-8deg);
  transform-origin: center bottom;
}

.ai-hero-grid {
  min-height: calc(820px - var(--nav-height));
  display: grid;
  grid-template-columns: minmax(0, .92fr) minmax(440px, 1.08fr);
  align-items: center;
  gap: clamp(32px, 6vw, 88px);
}

.ai-hero-copy {
  position: relative;
  z-index: 4;
  padding-top: 52px;
  padding-bottom: 74px;
}

.ai-hero-copy h1 {
  margin-top: 26px;
  font-size: clamp(3.4rem, 6vw, 5.5rem);
}

.ai-hero-lead {
  margin-top: 27px;
}

.ai-orbit {
  position: relative;
  width: min(100%, 640px);
  aspect-ratio: 1;
  justify-self: end;
}

.ai-route-map {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.ai-orbit-line {
  fill: none;
  opacity: .52;
  stroke: var(--color-line);
  stroke-dasharray: 3 10;
  stroke-width: 1;
}

.ai-orbit-line-outer {
  opacity: .28;
}

.ai-route-path {
  fill: none;
  stroke: var(--color-route);
  stroke-linecap: round;
  stroke-width: 1.4;
}

.ai-route-path-soft {
  opacity: .48;
  stroke-dasharray: 4 8;
}

.ai-route-node {
  fill: var(--color-bg);
  stroke: var(--color-accent);
  stroke-width: 2;
}

.ai-route-pulse {
  fill: var(--color-accent);
  transform-box: fill-box;
  transform-origin: center;
  animation: ai-node-pulse 2.8s var(--ease-soft) infinite;
}

.ai-route-pulse-b {
  animation-delay: .45s;
}

.ai-route-pulse-c {
  animation-delay: .9s;
}

.ai-route-pulse-d {
  animation-delay: 1.35s;
}

.ai-route-label {
  fill: var(--color-muted);
  font-family: var(--font-mono);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .12em;
}

.ai-orbit-core {
  position: absolute;
  z-index: 3;
  top: 50%;
  left: 50%;
  width: 162px;
  height: 162px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  border-radius: var(--radius-circle);
  background:
    radial-gradient(circle at 36% 28%, var(--color-ocean-bright), var(--color-ocean-mid) 42%, var(--color-ocean-dark));
  box-shadow:
    inset 0 0 0 1px var(--color-line),
    inset -24px -22px 38px var(--color-shadow-deep),
    var(--shadow-planet);
  transform: translate(-50%, -50%);
}

.ai-orbit-core strong {
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: 1.2rem;
  letter-spacing: -.02em;
}

.ai-orbit-core small {
  margin-top: 5px;
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: .62rem;
  letter-spacing: .14em;
}

.ai-core-status {
  width: 8px;
  height: 8px;
  margin-bottom: 13px;
  border-radius: var(--radius-circle);
  background: var(--color-success);
  box-shadow: 0 0 0 7px var(--color-accent-soft);
}

.ai-signal-card {
  position: absolute;
  z-index: 4;
  min-height: 38px;
  padding: 0 15px;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  border-radius: var(--radius-pill);
  background: var(--color-panel-raised);
  color: var(--color-text-soft);
  box-shadow: var(--shadow-panel), inset 0 0 0 1px var(--color-border);
  font-family: var(--font-mono);
  font-size: .7rem;
  white-space: nowrap;
}

.ai-signal-card span {
  width: 6px;
  height: 6px;
  flex: 0 0 auto;
  border-radius: var(--radius-circle);
  background: var(--color-success);
}

.ai-signal-card-top {
  top: 18%;
  left: 41%;
}

.ai-signal-card-bottom {
  right: 11%;
  bottom: 17%;
}

.ai-toc-wrap {
  position: relative;
  z-index: 10;
}

.ai-split {
  display: grid;
  grid-template-columns: minmax(270px, .76fr) minmax(0, 1.24fr);
  align-items: start;
  gap: clamp(42px, 8vw, 110px);
}

.ai-sticky-head {
  position: sticky;
  top: calc(var(--toc-top) + var(--toc-height) + 26px);
  margin-bottom: 0;
}

.ai-story {
  position: relative;
  display: grid;
  gap: 0;
}

.ai-story::before {
  position: absolute;
  top: 18px;
  bottom: 18px;
  left: 7px;
  width: 1px;
  background: linear-gradient(var(--color-accent), var(--color-border));
  content: "";
}

.ai-story-item {
  position: relative;
  padding: 0 0 52px 42px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
}

.ai-story-item:last-child {
  padding-bottom: 0;
}

.ai-story-marker {
  position: absolute;
  z-index: 2;
  top: 8px;
  left: 0;
  width: 15px;
  height: 15px;
  border: 4px solid var(--color-bg);
  border-radius: var(--radius-circle);
  background: var(--color-accent);
  box-shadow: 0 0 0 1px var(--color-accent-border);
}

.ai-story-item p {
  margin-bottom: 0;
  color: var(--color-muted);
  line-height: 1.9;
}

.ai-panel-section {
  background: var(--color-panel-soft);
  box-shadow:
    inset 0 1px 0 var(--color-border),
    inset 0 -1px 0 var(--color-border);
}

.ai-tool-table strong {
  color: var(--color-text);
}

.ai-account-grid {
  display: grid;
  grid-template-columns: minmax(260px, .72fr) minmax(0, 1.28fr);
  align-items: start;
  gap: clamp(38px, 7vw, 96px);
}

.ai-account-notes {
  display: grid;
  gap: 16px;
}

.ai-account-notes p {
  margin-bottom: 0;
  color: var(--color-muted);
  line-height: 1.85;
}

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

.ai-compare-column {
  padding: clamp(26px, 4vw, 42px);
  border-radius: var(--radius-lg);
  background: var(--color-panel);
  box-shadow: inset 0 0 0 1px var(--color-border);
}

.ai-compare-column-raised {
  background: var(--color-panel-raised);
  box-shadow: inset 0 0 0 1px var(--color-accent-border), var(--shadow-panel);
}

.ai-compare-column h3 {
  margin-top: 22px;
}

.ai-compare-column p,
.ai-compare-column li {
  color: var(--color-muted);
  line-height: 1.85;
}

.ai-compare-column ul {
  margin: 24px 0 0;
  padding: 22px 0 0;
  border-top: 1px solid var(--color-border);
  list-style: none;
}

.ai-compare-column li {
  position: relative;
  padding-left: 24px;
}

.ai-compare-column li + li {
  margin-top: 10px;
}

.ai-compare-column li::before {
  position: absolute;
  left: 0;
  color: var(--color-accent);
  content: "→";
  font-family: var(--font-mono);
}

.ai-developer-layout {
  display: grid;
  grid-template-columns: minmax(350px, .9fr) minmax(0, 1.1fr);
  align-items: center;
  gap: clamp(48px, 8vw, 110px);
}

.ai-developer-map {
  position: sticky;
  top: calc(var(--toc-top) + var(--toc-height) + 36px);
  min-height: 520px;
  border-radius: var(--radius-xl);
  background:
    linear-gradient(var(--color-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-line) 1px, transparent 1px),
    var(--color-panel);
  background-size: 38px 38px, 38px 38px, auto;
  box-shadow: inset 0 0 0 1px var(--color-border), var(--shadow-panel);
}

.ai-developer-map::before,
.ai-developer-map::after {
  position: absolute;
  top: 50%;
  left: 50%;
  height: 1px;
  background: var(--color-route);
  content: "";
  transform-origin: left center;
}

.ai-developer-map::before {
  width: 38%;
  transform: rotate(-140deg);
}

.ai-developer-map::after {
  width: 35%;
  transform: rotate(38deg);
}

.ai-dev-hub,
.ai-dev-node {
  position: absolute;
  display: grid;
  place-items: center;
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: .72rem;
  font-weight: 680;
  white-space: nowrap;
}

.ai-dev-hub {
  top: 50%;
  left: 50%;
  width: 132px;
  min-height: 54px;
  grid-template-columns: auto auto;
  gap: 9px;
  background: var(--color-panel-raised);
  color: var(--color-text);
  box-shadow: inset 0 0 0 1px var(--color-accent-border), var(--shadow-panel);
  transform: translate(-50%, -50%);
}

.ai-dev-hub span {
  width: 7px;
  height: 7px;
  border-radius: var(--radius-circle);
  background: var(--color-success);
}

.ai-dev-node {
  min-width: 102px;
  min-height: 42px;
  padding: 0 14px;
  background: var(--color-panel-raised);
  color: var(--color-muted);
  box-shadow: inset 0 0 0 1px var(--color-border);
}

.ai-dev-node::before {
  width: 6px;
  height: 6px;
  margin-right: 8px;
  display: inline-block;
  border-radius: var(--radius-circle);
  background: var(--color-accent);
  content: "";
}

.ai-dev-node-terminal {
  top: 16%;
  left: 12%;
}

.ai-dev-node-ide {
  top: 18%;
  right: 9%;
}

.ai-dev-node-ci {
  right: 15%;
  bottom: 14%;
}

.ai-developer-copy h3 {
  margin-top: 34px;
}

.ai-developer-copy p {
  color: var(--color-muted);
  line-height: 1.9;
}

.ai-failure-list {
  max-width: 900px;
  display: grid;
  gap: 12px;
}

.ai-selection {
  padding: clamp(28px, 6vw, 62px);
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(300px, .7fr);
  gap: clamp(36px, 7vw, 90px);
  border-radius: var(--radius-xl);
  background: var(--color-panel);
  box-shadow: inset 0 0 0 1px var(--color-border), var(--shadow-panel);
}

.ai-selection > div > p:not(.section-kicker) {
  color: var(--color-muted);
  line-height: 1.9;
}

.ai-selection-actions {
  padding: 28px;
  align-self: start;
  border-radius: var(--radius-lg);
  background: var(--color-panel-raised);
  box-shadow: inset 0 0 0 1px var(--color-accent-border);
}

.ai-selection-actions h3 {
  margin-top: 20px;
}

.ai-selection-actions > p {
  color: var(--color-muted);
  line-height: 1.8;
}

.ai-selection-actions .button {
  width: 100%;
  margin-top: 10px;
}

.ai-selection-note {
  margin: 20px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--color-border);
  font-size: .82rem;
}

@keyframes ai-node-pulse {
  0%,
  100% {
    opacity: .45;
    transform: scale(.72);
  }

  50% {
    opacity: 1;
    transform: scale(1.45);
  }
}

@media (max-width: 1040px) {
  .ai-hero-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .ai-hero-copy {
    max-width: 760px;
    padding-bottom: 12px;
  }

  .ai-orbit {
    width: min(100%, 570px);
    justify-self: center;
  }

  .ai-split,
  .ai-account-grid,
  .ai-developer-layout,
  .ai-selection {
    grid-template-columns: minmax(0, 1fr);
  }

  .ai-sticky-head,
  .ai-developer-map {
    position: relative;
    top: auto;
  }

  .ai-developer-map {
    width: min(100%, 620px);
    min-height: 480px;
    margin-inline: auto;
  }

  .ai-selection-actions {
    width: min(100%, 520px);
  }
}

@media (max-width: 720px) {
  .ai-hero {
    min-height: auto;
  }

  .ai-hero-grid {
    min-height: auto;
  }

  .ai-hero-copy {
    padding-top: 42px;
  }

  .ai-hero-copy h1 {
    font-size: clamp(2.7rem, 13vw, 4rem);
  }

  .ai-orbit {
    width: min(100%, 420px);
    margin-bottom: 36px;
  }

  .ai-orbit-core {
    width: 116px;
    height: 116px;
  }

  .ai-signal-card-top {
    top: 10%;
    left: 35%;
  }

  .ai-signal-card-bottom {
    right: 2%;
    bottom: 10%;
  }

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

  .ai-story-item {
    padding-left: 34px;
  }

  .ai-developer-map {
    min-height: 390px;
  }

  .ai-dev-node {
    min-width: 86px;
    padding-inline: 10px;
    font-size: .66rem;
  }

  .ai-dev-hub {
    width: 112px;
    font-size: .66rem;
  }

  .ai-dev-node-terminal {
    left: 6%;
  }

  .ai-dev-node-ide {
    right: 5%;
  }

  .ai-selection {
    padding: 24px;
  }

  .ai-selection-actions {
    padding: 22px;
  }
}

@media (max-width: 420px) {
  .ai-orbit {
    width: 330px;
    max-width: 100%;
  }

  .ai-signal-card {
    min-height: 34px;
    padding-inline: 11px;
    font-size: .62rem;
  }

  .ai-signal-card-top {
    top: 4%;
    left: 31%;
  }

  .ai-signal-card-bottom {
    right: 0;
    bottom: 4%;
  }

  .ai-developer-map {
    min-height: 340px;
  }

  .ai-dev-node-terminal {
    top: 11%;
    left: 4%;
  }

  .ai-dev-node-ide {
    top: 13%;
    right: 4%;
  }

  .ai-dev-node-ci {
    right: 8%;
    bottom: 10%;
  }
}

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