.ai-hero {
  padding-top: 24px;
}

.ai-hero-shell {
  position: relative;
  min-height: 780px;
  padding: 70px 48px 0;
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-hero);
  background: var(--gradient-hero);
  box-shadow: var(--shadow-panel);
}

.ai-hero-glow {
  position: absolute;
  inset: 0;
  max-width: 100%;
  overflow-x: clip;
  pointer-events: none;
}

.ai-hero-glow::before {
  position: absolute;
  right: 8%;
  bottom: -22%;
  left: 8%;
  height: 72%;
  border-radius: var(--radius-pill);
  background: radial-gradient(
    closest-side,
    color-mix(in srgb, var(--color-accent) 28%, var(--color-transparent)),
    color-mix(in srgb, var(--color-gold) 10%, var(--color-transparent)) 46%,
    var(--color-transparent) 78%
  );
  content: "";
}

.ai-hero-glow::after {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(color-mix(in srgb, var(--color-lilac) 8%, var(--color-transparent)) 1px, var(--color-transparent) 1px),
    linear-gradient(90deg, color-mix(in srgb, var(--color-lilac) 8%, var(--color-transparent)) 1px, var(--color-transparent) 1px);
  background-size: 36px 36px;
  content: "";
  opacity: 0.38;
  mask-image: linear-gradient(to bottom, var(--color-deep), var(--color-transparent) 72%);
}

.ai-hero-copy {
  position: relative;
  z-index: 3;
  display: flex;
  max-width: 910px;
  margin-inline: auto;
  align-items: center;
  flex-direction: column;
  text-align: center;
}

.ai-hero-copy h1 {
  margin-top: 18px;
  font-size: clamp(52px, 5vw, 68px);
}

.ai-hero-lead {
  max-width: 820px;
  margin-top: 18px;
  font-size: 18px;
}

.ai-console {
  position: absolute;
  z-index: 4;
  right: 50%;
  bottom: -32px;
  width: min(1050px, calc(100% - 70px));
  overflow: hidden;
  border: 1px solid var(--color-window-line);
  border-radius: var(--radius-window);
  background: var(--color-window);
  box-shadow: var(--shadow-window);
  color: var(--color-window-ink);
  transform: translateX(50%);
}

.ai-console-bar {
  display: grid;
  min-height: 46px;
  align-items: center;
  grid-template-columns: 1fr auto 1fr;
  padding-inline: 17px;
  border-bottom: 1px solid var(--color-window-line);
  background: var(--color-window-panel);
}

.ai-console-bar > strong {
  color: var(--color-window-ink);
  font-size: 12px;
  text-align: center;
}

.ai-console-bar > span {
  justify-self: end;
  color: var(--color-window-muted);
  font-family: var(--font-mono);
  font-size: 10px;
}

.ai-console-body {
  display: grid;
  min-height: 330px;
  grid-template-columns: 22% 46% 32%;
}

.ai-tool-rail {
  display: flex;
  min-width: 0;
  flex-direction: column;
  gap: 5px;
  padding: 22px 14px;
  border-right: 1px solid var(--color-window-line);
  background: var(--color-window-panel);
}

.ai-tool-rail strong {
  margin: 0 8px 8px;
  color: var(--color-window-muted);
  font-size: 10px;
  letter-spacing: 0.08em;
}

.ai-tool-rail span {
  min-height: 36px;
  padding: 8px 10px;
  border-radius: var(--radius-small);
  color: var(--color-window-muted);
  font-size: 11px;
  font-weight: 700;
}

.ai-tool-rail span.is-current {
  background: var(--color-accent);
  color: var(--color-window-panel);
}

.ai-session-list {
  min-width: 0;
  padding: 17px;
  border-right: 1px solid var(--color-window-line);
  background: var(--color-window-panel);
}

.ai-session {
  display: flex;
  min-width: 0;
  min-height: 82px;
  align-items: center;
  gap: 11px;
  padding: 12px;
  border-bottom: 1px solid var(--color-window-line);
}

.ai-session.is-active {
  border-radius: var(--radius-medium);
  background: var(--color-window-soft);
}

.ai-session-mark {
  display: grid;
  width: 38px;
  height: 38px;
  flex: 0 0 auto;
  place-items: center;
  border-radius: var(--radius-medium);
}

.ai-session-mark svg {
  width: 21px;
  height: 21px;
}

.ai-session-mark.sky {
  background: color-mix(in srgb, var(--color-sky) 22%, var(--color-window-panel));
  color: var(--color-flag-blue);
}

.ai-session-mark.mint {
  background: color-mix(in srgb, var(--color-mint) 25%, var(--color-window-panel));
  color: var(--color-accent-dark);
}

.ai-session-mark.gold {
  background: color-mix(in srgb, var(--color-gold) 27%, var(--color-window-panel));
  color: var(--color-accent-dark);
}

.ai-session > span:nth-child(2) {
  min-width: 0;
}

.ai-session strong,
.ai-session small {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.ai-session strong {
  color: var(--color-window-ink);
  font-size: 12px;
}

.ai-session small {
  margin-top: 4px;
  color: var(--color-window-muted);
  font-family: var(--font-mono);
  font-size: 9px;
}

.ai-session b {
  min-width: max-content;
  margin-left: auto;
  color: var(--color-accent-dark);
  font-size: 10px;
}

.ai-route-detail {
  min-width: 0;
  padding: 26px 22px;
}

.ai-route-detail h2 {
  margin: 6px 0 18px;
  color: var(--color-window-ink);
  font-size: 24px;
}

.ai-route-detail dl {
  padding: 5px 12px;
  border: 1px solid var(--color-window-line);
  border-radius: var(--radius-medium);
  background: var(--color-window-panel);
}

.ai-route-detail dl div {
  display: flex;
  min-height: 38px;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  border-bottom: 1px solid var(--color-window-line);
}

.ai-route-detail dl div:last-child {
  border-bottom: 0;
}

.ai-route-detail dt,
.ai-route-detail dd {
  font-size: 10px;
}

.ai-route-detail dt {
  color: var(--color-window-muted);
}

.ai-route-detail dd {
  color: var(--color-window-ink);
  font-family: var(--font-mono);
  font-weight: 700;
  text-align: right;
}

.ai-route-detail > a {
  display: inline-flex;
  min-height: 34px;
  align-items: center;
  margin-top: 16px;
  color: var(--color-accent-dark);
  font-size: 11px;
  font-weight: 800;
}

.ai-article {
  max-width: calc(var(--layout-max) + (var(--gutter) * 2));
  padding-top: 78px;
}

.ai-section {
  padding-top: 82px;
  padding-bottom: 26px;
}

.ai-section .section-head {
  max-width: 800px;
}

.ai-principle-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.ai-principle-card,
.ai-tool-card,
.ai-selection-card {
  min-width: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  background: var(--color-panel);
  box-shadow: var(--shadow-panel);
}

.ai-principle-card {
  padding: 26px;
}

.ai-card-icon {
  display: grid;
  width: 48px;
  height: 48px;
  place-items: center;
  border-radius: var(--radius-medium);
}

.ai-card-icon svg {
  width: 24px;
  height: 24px;
}

.ai-card-icon.sky {
  background: color-mix(in srgb, var(--color-sky) 18%, var(--color-transparent));
  color: var(--color-sky);
}

.ai-card-icon.mint {
  background: color-mix(in srgb, var(--color-mint) 18%, var(--color-transparent));
  color: var(--color-mint);
}

.ai-card-icon.gold {
  background: color-mix(in srgb, var(--color-gold) 18%, var(--color-transparent));
  color: var(--color-gold);
}

.ai-principle-card h3 {
  margin-top: 19px;
  font-size: 21px;
}

.ai-principle-card p {
  margin-top: 12px;
}

.ai-principle-grid + .callout,
.ai-split + .callout {
  margin-top: 24px;
}

.ai-tool-cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.ai-tool-card {
  padding: 24px;
}

.ai-tool-name {
  display: flex;
  align-items: center;
  gap: 10px;
}

.ai-tool-name h3 {
  font-size: 22px;
}

.ai-tool-card p {
  margin-top: 12px;
}

.ai-prose {
  max-width: 880px;
  margin-inline: auto;
}

.ai-prose h3 {
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-border);
  font-size: 23px;
}

.ai-prose h3:not(:first-child) {
  margin-top: 42px;
}

.ai-prose p {
  font-size: 17px;
}

.ai-split {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.ai-mode-card {
  padding: 28px;
}

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

.ai-mode-card p {
  margin-top: 13px;
}

.ai-selection-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.ai-selection-card {
  padding: 23px;
}

.ai-selection-card strong {
  display: block;
  font-size: 18px;
}

.ai-selection-card p {
  margin-top: 9px;
}

.ai-next-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 28px;
}

.ai-next-card {
  display: flex;
  min-width: 0;
  min-height: 230px;
  flex-direction: column;
  padding: 26px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-window);
  background: var(--color-panel-raised);
  box-shadow: var(--shadow-panel);
  transition: border-color var(--duration-fast), transform var(--duration-fast);
}

.ai-next-card:hover {
  border-color: var(--color-lilac);
  transform: translateY(-3px);
}

.ai-next-card > strong {
  margin-top: 18px;
  font-size: 22px;
}

.ai-next-card p {
  margin-top: 10px;
}

.ai-next-card .article-more {
  margin-top: auto;
}

.ai-section .promo-block {
  margin-top: 28px;
}

@media (max-width: 1024px) {
  .ai-hero-shell {
    min-height: 800px;
  }

  .ai-console-body {
    grid-template-columns: 35% 65%;
  }

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

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

@media (max-width: 768px) {
  .ai-hero {
    padding-top: 16px;
  }

  .ai-hero-shell {
    min-height: 850px;
    padding: 46px 18px 0;
  }

  .ai-hero-copy h1 {
    font-size: clamp(30px, 9vw, 40px);
  }

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

  .ai-console {
    bottom: -24px;
    width: calc(100% - 24px);
  }

  .ai-console-body {
    min-height: 320px;
    grid-template-columns: 1fr;
  }

  .ai-session-list {
    border-right: 0;
  }

  .ai-route-detail {
    display: none;
  }

  .ai-tool-cards,
  .ai-split,
  .ai-selection-grid,
  .ai-next-links {
    grid-template-columns: 1fr;
  }

  .ai-section {
    padding-top: 68px;
  }

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

@media (max-width: 640px) {
  .ai-hero-shell {
    min-height: 900px;
  }

  .ai-console-bar > span {
    display: none;
  }

  .ai-console-bar {
    grid-template-columns: 1fr auto 1fr;
  }

  .ai-session {
    padding-inline: 9px;
  }

  .ai-session b {
    display: none;
  }

  .ai-principle-card,
  .ai-tool-card,
  .ai-mode-card,
  .ai-selection-card,
  .ai-next-card {
    padding: 21px;
  }

  .ai-article {
    padding-top: 58px;
  }
}

@media (max-width: 390px) {
  .ai-hero-shell {
    min-height: 930px;
  }

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

  .ai-session {
    min-height: 78px;
  }
}