.ai-hero {
  position: relative;
  max-width: 100%;
  overflow-x: clip;
  border-bottom: 1px solid var(--color-border);
  background: linear-gradient(180deg, var(--color-hero-top), var(--color-hero-bottom));
}

.ai-hero::before {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: radial-gradient(var(--color-accent-10) 1px, transparent 1px);
  background-size: 12px 12px;
  content: "";
  opacity: .36;
}

.ai-hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 48fr) minmax(0, 52fr);
  gap: 58px;
  align-items: center;
  padding-top: 64px;
  padding-bottom: 70px;
}

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

.ai-hero-copy h1 {
  max-width: 10em;
  margin: 22px 0 0;
}

.ai-hero-lede {
  max-width: 39rem;
  margin: 25px 0 0;
  color: var(--color-muted);
  font-size: 18px;
  line-height: 1.78;
}

.ai-hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 20px;
  margin-top: 29px;
}

.ai-fact-row {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin: 27px 0 0;
  padding: 0;
  list-style: none;
}

.ai-fact-row li {
  display: inline-flex;
  min-height: 30px;
  align-items: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-panel);
  padding: 5px 11px;
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 11px;
}

.ai-route-board {
  position: relative;
  z-index: 1;
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--color-paper-12);
  border-radius: var(--radius-block);
  background: linear-gradient(180deg, var(--color-ink-panel), var(--color-ink-deep));
  box-shadow: var(--shadow-accent), inset 0 1px 0 var(--color-paper-12);
}

.ai-route-board::after {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(70% 42% at 50% 0%, var(--color-accent-16), transparent 76%);
  content: "";
}

.ai-board-head,
.ai-board-foot {
  position: relative;
  z-index: 2;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 18px 22px;
}

.ai-board-head {
  border-bottom: 1px solid var(--color-paper-12);
}

.ai-board-head .mono-label {
  color: var(--color-amber);
}

.ai-board-head .status-chip {
  border-color: var(--color-paper-12);
  background: var(--color-paper-06);
}

.ai-board-foot {
  justify-content: flex-start;
  border-top: 1px solid var(--color-paper-12);
}

.ai-board-foot .fact-chip {
  border-color: var(--color-accent-55);
  color: var(--color-paper);
}

.ai-route-stage {
  position: relative;
  z-index: 1;
  min-height: 390px;
  padding: 22px;
}

.ai-route-stage svg {
  width: 100%;
  height: auto;
  color: var(--color-accent);
}

.ai-route-line {
  fill: none;
  stroke: currentColor;
  stroke-dasharray: 7 8;
  stroke-linecap: round;
  stroke-width: 2;
}

.ai-route-node {
  fill: var(--color-ink-card);
  stroke: var(--color-amber);
  stroke-width: 3;
}

.ai-route-node-main {
  fill: var(--color-accent);
  stroke: var(--color-paper);
}

.ai-route-mark {
  fill: var(--color-amber);
  stroke: var(--color-ink-deep);
  stroke-width: 4;
}

.ai-route-label {
  position: absolute;
  display: grid;
  gap: 2px;
  border: 1px solid var(--color-paper-12);
  border-radius: var(--radius-sm);
  background: var(--color-ink-card);
  color: var(--color-paper);
  padding: 8px 10px;
  box-shadow: var(--shadow-panel);
}

.ai-route-label strong {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 400;
}

.ai-route-label span {
  color: var(--color-paper-72);
  font-family: var(--font-mono);
  font-size: 9px;
}

.ai-label-origin {
  top: 44%;
  left: 3%;
}

.ai-label-web {
  top: 9%;
  left: 40%;
}

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

.ai-label-dev {
  bottom: 8%;
  left: 40%;
}

.ai-article {
  padding-top: 34px;
  padding-bottom: var(--space-section);
}

.ai-section {
  padding-top: 74px;
  padding-bottom: 18px;
}

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

.ai-principle-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-bottom: 26px;
}

.ai-principle {
  position: relative;
  min-width: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  background: var(--color-panel);
  padding: 28px;
  box-shadow: var(--shadow-panel);
}

.ai-principle-mark {
  display: inline-flex;
  border-bottom: 1px solid var(--color-accent);
  color: var(--color-accent-dark);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
}

.ai-principle h3 {
  margin: 18px 0 10px;
  font-size: 27px;
}

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

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

.ai-tool-entry {
  display: grid;
  grid-template-columns: minmax(180px, .8fr) minmax(0, 2.2fr);
  gap: 34px;
  align-items: start;
  border-bottom: 1px solid var(--color-border);
  padding-top: 28px;
  padding-bottom: 28px;
}

.ai-tool-entry header span {
  color: var(--color-accent-dark);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .12em;
}

.ai-tool-entry h3 {
  margin: 7px 0 0;
  font-size: 29px;
}

.ai-tool-entry p {
  margin: 0;
  color: var(--color-muted);
  font-size: 17px;
}

.ai-text-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 38px;
  margin-bottom: 28px;
}

.ai-text-columns > div {
  min-width: 0;
  border-top: 3px solid var(--color-accent);
  padding-top: 22px;
}

.ai-text-columns h3 {
  margin-bottom: 14px;
  font-size: 28px;
}

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

.ai-flow-list {
  display: grid;
  border-block: 1px solid var(--color-border);
}

.ai-flow-list section {
  display: grid;
  grid-template-columns: minmax(210px, .9fr) minmax(0, 2fr);
  gap: 32px;
  border-bottom: 1px solid var(--color-border);
  padding-top: 26px;
  padding-bottom: 26px;
}

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

.ai-flow-list h3 {
  margin: 0;
  font-size: 25px;
}

.ai-flow-list p {
  margin: 0;
  color: var(--color-muted);
}

.ai-developer-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 19px;
  margin-bottom: 26px;
}

.ai-developer-card {
  padding: 27px;
}

.ai-developer-card h3 {
  margin-bottom: 17px;
  font-size: 27px;
}

.ai-developer-card ul {
  display: grid;
  gap: 11px;
  margin: 0;
  padding-left: 1.15rem;
  color: var(--color-muted);
}

.ai-developer-card li::marker {
  color: var(--color-accent);
}

.ai-support-note {
  display: grid;
  grid-template-columns: minmax(180px, .7fr) minmax(0, 2fr) auto;
  gap: 24px;
  align-items: center;
  margin-top: 28px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  background: var(--color-panel-alt);
  padding: 28px;
}

.ai-support-note h3,
.ai-support-note p {
  margin: 0;
}

.ai-support-note h3 {
  font-size: 26px;
}

.ai-support-note p {
  color: var(--color-muted);
}

.ai-selection-ledger {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--color-border);
  border-left: 1px solid var(--color-border);
}

.ai-selection-ledger section {
  min-width: 0;
  border-right: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding: 27px;
}

.ai-selection-ledger h3 {
  margin: 12px 0 10px;
  font-size: 26px;
}

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

.ai-final-links {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 36px;
  align-items: center;
  margin-top: 42px;
  border-radius: var(--radius-block);
  background: linear-gradient(135deg, var(--color-ink-panel), var(--color-ink-deep));
  color: var(--color-paper);
  padding: 36px;
  box-shadow: var(--shadow-accent);
}

.ai-final-links h3 {
  margin-bottom: 9px;
  color: var(--color-paper);
  font-size: 31px;
}

.ai-final-links p {
  max-width: 52rem;
  color: var(--color-paper-72);
}

.ai-final-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 12px;
}

.ai-final-links .button-primary {
  background: var(--color-accent);
  color: var(--color-ink);
}

.ai-final-links .button-primary:hover {
  background: var(--color-amber);
}

.ai-final-links .button-outline {
  border-color: var(--color-paper);
  color: var(--color-paper);
}

.ai-final-links .button-outline:hover {
  background: var(--color-paper);
  color: var(--color-ink);
}

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

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

  .ai-route-board {
    max-width: 820px;
  }

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

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

  .ai-support-note .button {
    justify-self: start;
  }
}

@media (max-width: 768px) {
  .ai-hero-grid {
    gap: 42px;
    padding-top: 45px;
    padding-bottom: 52px;
  }

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

  .ai-route-label {
    padding: 6px 8px;
  }

  .ai-route-label strong {
    font-size: 12px;
  }

  .ai-route-label span {
    display: none;
  }

  .ai-principle-grid,
  .ai-text-columns,
  .ai-selection-ledger {
    grid-template-columns: 1fr;
  }

  .ai-tool-entry,
  .ai-flow-list section {
    grid-template-columns: 1fr;
    gap: 13px;
  }

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

  .ai-final-actions {
    justify-content: flex-start;
  }
}

@media (max-width: 640px) {
  .ai-hero-lede {
    font-size: 16px;
  }

  .ai-route-stage {
    min-height: 260px;
    padding: 12px;
  }

  .ai-route-label {
    position: static;
    display: inline-grid;
    margin: 5px 4px;
  }

  .ai-route-stage svg {
    margin-bottom: 5px;
  }

  .ai-board-head,
  .ai-board-foot {
    padding-inline: 14px;
  }

  .ai-article {
    padding-top: 22px;
  }

  .ai-section {
    padding-top: 54px;
    padding-bottom: 12px;
  }

  .ai-principle,
  .ai-developer-card,
  .ai-selection-ledger section {
    padding: 22px;
  }

  .ai-tool-entry p {
    font-size: 16px;
  }

  .ai-support-note,
  .ai-final-links {
    padding: 24px;
  }

  .ai-final-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .ai-final-actions .button {
    width: 100%;
  }
}