.ai-hero {
  padding-top: 70px;
  padding-bottom: 74px;
  border-bottom: 1px solid var(--color-border);
}

.ai-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(360px, .92fr);
  align-items: center;
  gap: 58px;
}

.ai-hero-copy {
  min-width: 0;
}

.ai-hero-copy h1 {
  max-width: 760px;
  margin-top: 18px;
}

.ai-hero-copy .lead {
  max-width: 720px;
  margin-bottom: 20px;
}

.ai-signal-board {
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-panel);
  box-shadow: var(--shadow-soft);
}

.ai-board-head {
  display: flex;
  min-height: 44px;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 10px 16px;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .1em;
}

.ai-live {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--color-text);
}

.ai-live-dot {
  width: 7px;
  height: 7px;
  flex: 0 0 auto;
  border-radius: var(--radius-pill);
  background: var(--color-accent);
}

.ai-board-body {
  display: grid;
  gap: 9px;
  padding: 18px;
}

.ai-board-route {
  display: grid;
  min-width: 0;
  grid-template-columns: 58px minmax(110px, .7fr) minmax(0, 1fr);
  align-items: center;
  gap: 12px;
  min-height: 56px;
  padding: 10px 13px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-canvas);
  box-shadow: var(--shadow-cell);
}

.ai-board-route.is-current {
  border-color: var(--color-accent);
}

.ai-route-code {
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .08em;
}

.ai-board-route.is-current .ai-route-code {
  color: var(--color-accent-dark);
}

.ai-board-route strong {
  color: var(--color-text);
  font-size: 13px;
}

.ai-board-route > span:last-child {
  min-width: 0;
  color: var(--color-text-muted);
  font-size: 12px;
}

.ai-board-foot {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  padding: 14px 18px;
  border-top: 1px solid var(--color-border);
  background: var(--color-panel-strong);
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .05em;
}

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

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

.ai-section-heading {
  max-width: 820px;
  margin-bottom: 34px;
}

.ai-section-heading .eyebrow,
.reading-wrap > .eyebrow,
.selection-panel .eyebrow {
  display: block;
  margin-bottom: 12px;
}

.ai-section-heading p {
  color: var(--color-text-muted);
  font-size: 16px;
}

.ai-document .reading-wrap > p,
.ai-document .reading-wrap > ul,
.ai-document .reading-wrap > ol {
  color: var(--color-text-muted);
}

.ai-document .reading-wrap h3 {
  margin-top: 34px;
}

.tool-notes {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--color-border);
  border-left: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--color-canvas);
  box-shadow: var(--shadow-cell);
}

.tool-note {
  min-width: 0;
  padding: 28px;
  border-right: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.tool-note-code {
  margin-bottom: 14px;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .12em;
}

.tool-note p {
  color: var(--color-text-muted);
}

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

.ai-route-table td {
  min-width: 150px;
  color: var(--color-text-muted);
}

.ai-route-table td:first-child {
  min-width: 120px;
  font-family: var(--font-mono);
}

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

.ai-check-list {
  display: grid;
  gap: 11px;
  margin-bottom: 0;
  padding-left: 20px;
  color: var(--color-text-muted);
}

.ai-followup {
  max-width: 940px;
  margin-top: 24px;
  color: var(--color-text-muted);
}

.failure-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.failure-card {
  min-width: 0;
  padding: 22px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-canvas);
  box-shadow: var(--shadow-cell);
}

.failure-card h3 {
  font-size: 19px;
}

.failure-card p {
  color: var(--color-text-muted);
}

.selection-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 42px;
  padding: 34px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-panel);
  box-shadow: var(--shadow-soft);
}

.selection-panel h2 {
  margin-bottom: 16px;
}

.selection-panel p {
  max-width: 850px;
  color: var(--color-text-muted);
}

.selection-actions {
  display: grid;
  min-width: 150px;
  gap: 10px;
}

@media (max-width: 980px) {
  .ai-hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .ai-signal-board {
    max-width: 760px;
  }

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

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

  .selection-actions {
    display: flex;
    flex-wrap: wrap;
  }
}

@media (max-width: 768px) {
  .ai-hero {
    padding-top: 50px;
    padding-bottom: 58px;
  }

  .tool-notes,
  .ai-split {
    grid-template-columns: 1fr;
  }

  .tool-note {
    padding: 24px;
  }

  .selection-panel {
    gap: 24px;
    padding: 26px;
  }
}

@media (max-width: 640px) {
  .ai-hero {
    padding-top: 38px;
    padding-bottom: 48px;
  }

  .ai-hero-grid {
    gap: 30px;
  }

  .ai-board-head {
    align-items: flex-start;
    flex-direction: column;
    gap: 5px;
  }

  .ai-board-route {
    grid-template-columns: 48px minmax(0, 1fr);
  }

  .ai-board-route > span:last-child {
    grid-column: 2;
  }

  .failure-grid {
    grid-template-columns: 1fr;
  }

  .selection-panel {
    padding: 20px;
  }

  .selection-actions {
    display: grid;
    width: 100%;
  }

  .selection-actions .button {
    width: 100%;
  }
}