.ai-hero {
  position: relative;
  padding-top: 92px;
  padding-bottom: 84px;
  overflow-x: clip;
  background:
    linear-gradient(180deg, var(--color-panel-muted), var(--color-bg)),
    radial-gradient(circle, var(--color-dot) 1px, transparent 1.3px);
}

.ai-hero::before {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(90deg, transparent, var(--color-highlight-soft), transparent),
    radial-gradient(circle, var(--color-dot) 1px, transparent 1.3px);
  background-size: 100% 100%, 16px 16px;
  content: "";
  opacity: .7;
}

.ai-hero-glow {
  position: absolute;
  top: 6%;
  right: 5%;
  width: 48%;
  height: 78%;
  max-width: 100%;
  border-radius: var(--radius-pill);
  background:
    radial-gradient(circle at 70% 30%, var(--color-cyan-halo), transparent 48%),
    radial-gradient(circle at 35% 70%, var(--color-accent-tint), transparent 54%);
  filter: blur(18px);
  pointer-events: none;
}

.ai-hero-layout {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, .9fr) minmax(460px, 1.1fr);
  align-items: center;
  gap: 68px;
}

.ai-hero-copy {
  max-width: 650px;
}

.ai-hero-copy h1 {
  margin-top: 16px;
  font-size: clamp(54px, 5.6vw, 70px);
}

.ai-hero-lead {
  max-width: 620px;
  margin-bottom: 28px;
  color: var(--color-text-muted);
  font-size: 19px;
  line-height: 1.72;
}

.ai-hero-copy .hero-actions {
  margin-top: 28px;
}

.ai-flow-board {
  position: relative;
  min-height: 470px;
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(145deg, var(--color-panel), var(--color-panel-muted)),
    radial-gradient(circle, var(--color-dot) 1px, transparent 1.3px);
  box-shadow: var(--shadow-panel);
}

.ai-flow-board::after {
  position: absolute;
  right: 0;
  bottom: 0;
  width: 42%;
  height: 48%;
  background: linear-gradient(135deg, transparent, var(--color-accent-bright));
  content: "";
  opacity: .13;
  mask-image: radial-gradient(circle, #000 1.5px, transparent 1.9px);
  mask-size: 9px 9px;
  pointer-events: none;
}

.ai-flow-head {
  position: absolute;
  top: 18px;
  right: 18px;
  left: 18px;
  z-index: 3;
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}

.ai-flow-lines {
  position: absolute;
  top: 58px;
  right: 18px;
  bottom: 28px;
  left: 18px;
  width: calc(100% - 36px);
  height: calc(100% - 86px);
  color: var(--color-accent);
  opacity: .58;
}

.ai-flow-lines path,
.ai-flow-lines circle {
  stroke-width: 2;
  vector-effect: non-scaling-stroke;
}

.ai-flow-source,
.ai-flow-route,
.ai-flow-tools span {
  position: absolute;
  z-index: 2;
  border: 1px solid var(--color-border);
  background: var(--color-panel);
  box-shadow: 0 14px 30px -22px var(--color-accent-shadow);
}

.ai-flow-source {
  top: 48%;
  left: 4%;
  width: 126px;
  padding: 16px;
  border-radius: var(--radius-md);
  transform: translateY(-50%);
}

.ai-flow-source strong,
.ai-flow-source small,
.ai-flow-route strong,
.ai-flow-route small {
  display: block;
}

.ai-flow-source small,
.ai-flow-route small {
  margin-top: 4px;
  color: var(--color-text-muted);
  font: 11px/1.45 var(--font-mono);
}

.ai-flow-dot {
  width: 8px;
  height: 8px;
  margin-bottom: 12px;
  border-radius: var(--radius-pill);
  background: var(--color-accent-bright);
  box-shadow: 0 0 0 4px var(--color-cyan-halo);
  display: block;
}

.ai-flow-route {
  left: 42%;
  width: 138px;
  padding: 13px 14px;
  border-radius: var(--radius-sm);
}

.ai-flow-route-a {
  top: 18%;
}

.ai-flow-route-b {
  top: 43%;
}

.ai-flow-route-c {
  top: 68%;
}

.ai-flow-tools {
  position: absolute;
  top: 15%;
  right: 4%;
  bottom: 10%;
  z-index: 2;
  width: 126px;
  display: grid;
  align-content: space-between;
  gap: 9px;
}

.ai-flow-tools span {
  position: static;
  min-height: 38px;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  color: var(--color-accent);
  font: 600 11px/1.4 var(--font-mono);
  display: flex;
  align-items: center;
}

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

.ai-principle {
  position: relative;
  min-height: 280px;
  padding: 32px;
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-panel);
  box-shadow: var(--shadow-panel);
}

.ai-principle::after {
  position: absolute;
  right: -28px;
  bottom: -46px;
  width: 150px;
  height: 150px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  content: "";
  opacity: .65;
}

.ai-principle h3 {
  position: relative;
  z-index: 1;
  margin-top: 36px;
}

.ai-principle p {
  position: relative;
  z-index: 1;
  margin-bottom: 0;
  color: var(--color-text-muted);
  font-size: 16px;
}

.ai-principle-mark {
  color: var(--color-accent);
  font: 12px/1.4 var(--font-mono);
  letter-spacing: .1em;
}

.ai-tool-table td {
  min-width: 150px;
}

.ai-tool-table td:nth-child(4),
.ai-tool-table td:nth-child(5) {
  min-width: 220px;
}

.ai-tool-notes {
  border-top: 1px solid var(--color-border);
}

.ai-tool-note {
  padding-top: 38px;
  padding-bottom: 38px;
  border-bottom: 1px solid var(--color-border);
  display: grid;
  grid-template-columns: minmax(190px, .32fr) minmax(0, 1fr);
  gap: 54px;
}

.ai-tool-name {
  align-self: start;
}

.ai-tool-name h3 {
  margin: 14px 0 0;
}

.ai-tool-code {
  min-width: 68px;
  min-height: 34px;
  padding: 6px 12px;
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-pill);
  background: var(--color-accent-tint);
  color: var(--color-accent);
  font: 12px/1.4 var(--font-mono);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.ai-tool-copy {
  columns: 2;
  column-gap: 36px;
  color: var(--color-text-muted);
  font-size: 16px;
}

.ai-tool-copy p {
  break-inside: avoid;
}

.ai-tool-copy p:last-child {
  margin-bottom: 0;
}

.ai-split-section {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(340px, .85fr);
  align-items: center;
  gap: 70px;
}

.ai-split-copy > p:not(.eyebrow) {
  color: var(--color-text-muted);
  font-size: 17px;
}

.ai-api-window {
  box-shadow: var(--shadow-panel);
}

.ai-api-window .window-body {
  padding: 28px;
}

.ai-api-window .term-row {
  min-height: 42px;
  border-bottom: 1px solid var(--color-terminal-border);
}

.ai-api-window .term-row:last-child {
  border-bottom: 0;
}

.ai-workflow {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-panel);
  box-shadow: var(--shadow-panel);
}

.ai-workflow-row {
  padding: 32px;
  display: grid;
  grid-template-columns: minmax(210px, .4fr) minmax(0, 1fr);
  gap: 48px;
}

.ai-workflow-row + .ai-workflow-row {
  border-top: 1px solid var(--color-border);
}

.ai-workflow-title span {
  color: var(--color-accent);
  font: 12px/1.4 var(--font-mono);
  letter-spacing: .09em;
}

.ai-workflow-title h3 {
  margin-top: 14px;
  font-size: 24px;
}

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

.ai-workflow-row p:last-child {
  margin-bottom: 0;
}

.ai-failure-list {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-items: start;
}

.ai-selection-panel {
  position: relative;
  padding: 46px;
  overflow: hidden;
  border: 1px solid var(--color-terminal-border);
  border-radius: var(--radius-md);
  background: var(--color-accent-dark);
  color: var(--color-terminal-text);
  box-shadow: var(--shadow-panel);
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: 46px;
}

.ai-selection-panel::after {
  position: absolute;
  top: 0;
  right: 0;
  width: 36%;
  height: 100%;
  background: linear-gradient(135deg, transparent, var(--color-accent-bright));
  content: "";
  opacity: .16;
  mask-image: radial-gradient(circle, #000 1.5px, transparent 1.9px);
  mask-size: 8px 8px;
  pointer-events: none;
}

.ai-selection-copy,
.ai-selection-actions {
  position: relative;
  z-index: 1;
}

.ai-selection-copy {
  max-width: 860px;
}

.ai-selection-copy h2 {
  color: var(--color-terminal-text);
}

.ai-selection-copy .eyebrow {
  color: var(--color-terminal-muted);
}

.ai-selection-copy p:not(.eyebrow) {
  color: var(--color-terminal-muted);
  font-size: 16px;
}

.ai-selection-copy p:last-child {
  margin-bottom: 0;
}

.ai-selection-actions {
  min-width: 190px;
  display: grid;
  gap: 12px;
}

.ai-selection-actions .btn-secondary {
  border-color: var(--color-terminal-text);
  color: var(--color-terminal-text);
}

.ai-selection-actions .btn-secondary:hover {
  background: var(--color-highlight-soft);
}

@media (max-width: 1120px) {
  .ai-hero-layout {
    grid-template-columns: minmax(0, .9fr) minmax(400px, 1fr);
    gap: 36px;
  }

  .ai-flow-source {
    width: 112px;
  }

  .ai-flow-route {
    left: 40%;
    width: 126px;
  }

  .ai-flow-tools {
    width: 112px;
  }
}

@media (max-width: 920px) {
  .ai-hero {
    padding-top: 72px;
  }

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

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

  .ai-flow-board {
    min-height: 440px;
  }

  .ai-principle-grid,
  .ai-failure-list {
    grid-template-columns: 1fr;
  }

  .ai-tool-note {
    grid-template-columns: 150px minmax(0, 1fr);
    gap: 30px;
  }

  .ai-tool-copy {
    columns: 1;
  }

  .ai-split-section,
  .ai-selection-panel {
    grid-template-columns: 1fr;
  }

  .ai-selection-actions {
    min-width: 0;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 700px) {
  .ai-hero {
    padding-top: 54px;
    padding-bottom: 64px;
  }

  .ai-hero-copy h1 {
    font-size: clamp(34px, 10vw, 40px);
  }

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

  .ai-flow-board {
    min-height: auto;
    padding: 74px 16px 18px;
    display: grid;
    gap: 12px;
  }

  .ai-flow-lines {
    display: none;
  }

  .ai-flow-source,
  .ai-flow-route,
  .ai-flow-tools {
    position: static;
    width: 100%;
    transform: none;
  }

  .ai-flow-source,
  .ai-flow-route {
    padding: 13px 14px;
  }

  .ai-flow-tools {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .ai-flow-tools span {
    min-height: 42px;
  }

  .ai-principle {
    min-height: 0;
    padding: 25px 22px;
  }

  .ai-principle h3 {
    margin-top: 24px;
  }

  .ai-tool-note {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .ai-workflow-row {
    padding: 25px 22px;
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .ai-split-section {
    gap: 38px;
  }

  .ai-selection-panel {
    padding: 30px 22px;
    gap: 30px;
  }

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

@media (max-width: 420px) {
  .ai-flow-tools {
    grid-template-columns: 1fr;
  }

  .ai-hero-copy .hero-actions .btn {
    width: 100%;
  }
}