/* ===========================================================
   About IMAT — page-scoped styles
   BEM prefix: ai-
   Depends on: css/style.css for tokens
   =========================================================== */

/* Skip link (a11y) */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-burgundy);
  color: #fff;
  padding: 8px 14px;
  text-decoration: none;
  z-index: 9999;
}
.skip-link:focus {
  left: 8px;
  top: 8px;
}

/* Page container */
.ai-page {
  font-family: var(--font-body);
  color: var(--color-navy);
}

/* Numeric utility — numbers NEVER inherit Georgia */
.ai-num {
  font-family: var(--font-heading), var(--font-body);
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum";
}

/* ===== Hero ===== */
.ai-hero {
  position: relative;
  background: var(--color-navy);
  color: #fff;
  padding: clamp(60px, 10vw, 120px) 24px clamp(48px, 8vw, 96px);
  overflow: hidden;
}
.ai-hero__bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(60% 80% at 20% 30%, rgba(246, 238, 220, 0.12), transparent 70%),
    radial-gradient(45% 60% at 80% 70%, rgba(232, 71, 107, 0.18), transparent 70%);
  pointer-events: none;
}
.ai-hero__inner {
  position: relative;
  max-width: 820px;
  margin: 0 auto;
}
.ai-hero__eyebrow {
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-amber);
  margin-bottom: 16px;
}
.ai-hero__title {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: clamp(36px, 6vw, 64px);
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin: 0 0 16px;
  /* Global h1 rule in css/style.css sets color:navy — override for dark hero */
  color: #fff;
}
.ai-hero__subhead {
  font-family: var(--font-body);
  font-weight: 400;
  font-size: clamp(16px, 2vw, 19px);
  line-height: 1.55;
  color: rgba(255, 255, 255, 0.85);
  max-width: 680px;
  margin: 0 0 28px;
}
.ai-hero__attribution {
  font-family: var(--font-serif-editorial);
  font-style: italic;
  font-size: 12px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.62);
  padding-top: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  max-width: 680px;
}

/* ===== Shared topic container ===== */
.ai-topic {
  padding: clamp(40px, 6vw, 72px) 24px;
}
.ai-topic--white     { background: #ffffff; }
.ai-topic--parchment { background: var(--color-parchment, #F6EEDC); }
.ai-topic__inner {
  max-width: 820px;
  margin: 0 auto;
}
.ai-topic__eyebrow {
  font-family: var(--font-body);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-burgundy);
  margin-bottom: 10px;
}
.ai-topic__title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(22px, 3vw, 28px);
  line-height: 1.2;
  letter-spacing: -0.015em;
  color: var(--color-navy);
  margin: 0 0 16px;
}
.ai-topic__prose {
  font-family: var(--font-serif-editorial);
  font-size: 15px;
  line-height: 1.75;
  color: rgba(0, 31, 61, 0.82);
}
.ai-topic__prose p { margin: 0 0 14px; }
.ai-topic__prose p:last-child { margin-bottom: 0; }

/* ===== Pattern A — Fact table ===== */
.ai-fact-table {
  margin: 20px 0 0;
  border: 1px solid rgba(0, 31, 61, 0.08);
  border-radius: 10px;
  overflow: hidden;
  font-family: var(--font-body);
  font-size: 13px;
}
.ai-fact-table__row {
  display: flex;
  border-bottom: 1px solid rgba(0, 31, 61, 0.08);
}
.ai-fact-table__row:last-child { border-bottom: 0; }
.ai-fact-table__row--alt { background: rgba(220, 231, 243, 0.35); }
.ai-fact-table__row dt {
  flex: 0 0 42%;
  padding: 10px 14px;
  color: rgba(0, 31, 61, 0.6);
}
.ai-fact-table__row dd {
  flex: 1;
  padding: 10px 14px;
  margin: 0;
  color: var(--color-navy);
}
@media (max-width: 560px) {
  .ai-fact-table__row { flex-direction: column; }
  .ai-fact-table__row dt { flex: none; padding-bottom: 2px; }
  .ai-fact-table__row dd { padding-top: 2px; }
}

/* ===== Pattern B — Weighted bar ===== */
.ai-weight-bar {
  display: flex;
  height: 44px;
  border-radius: 6px;
  overflow: hidden;
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 4px;
}
.ai-weight-bar__seg {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 8px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.ai-weight-bar__seg--bio   { background: var(--color-burgundy, #6B2838); }
.ai-weight-bar__seg--chem  { background: var(--color-pink, #E8476B); }
.ai-weight-bar__seg--phys  { background: var(--color-amber, #D99B47); }
.ai-weight-bar__seg--logic { background: var(--color-teal, #2E7D7A); }
.ai-weight-bar__seg--rgk   { background: var(--color-navy, #001F3D); }
@media (max-width: 560px) {
  .ai-weight-bar { font-size: 10px; }
}

/* ===== Topic 4 — Big Idea (Light Premium Hybrid) ===== */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}
.ai-big-idea {
  padding: clamp(40px, 6vw, 72px) 24px;
  background: #fff;
}
.ai-big-idea__card {
  max-width: 960px;
  margin: 0 auto;
  background: linear-gradient(135deg, #FFFFFF 0%, var(--color-parchment, #F6EEDC) 100%);
  border-left: 4px solid var(--color-burgundy, #6B2838);
  border-radius: 12px;
  padding: clamp(24px, 4vw, 40px);
}
.ai-big-idea__head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}
.ai-big-idea__eyebrow {
  font-family: var(--font-body);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-burgundy, #6B2838);
  white-space: nowrap;
}
.ai-big-idea__eyebrow-line {
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--color-burgundy, #6B2838) 0%, transparent 100%);
}
.ai-big-idea__headline {
  font-family: var(--font-serif-editorial);
  font-weight: 700;
  font-size: clamp(26px, 4vw, 34px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--color-navy, #001F3D);
  margin: 0 0 18px;
}
.ai-big-idea__body {
  font-family: var(--font-serif-editorial);
  font-size: clamp(14px, 1.6vw, 16px);
  line-height: 1.75;
  color: rgba(0, 31, 61, 0.82);
  margin: 0 0 22px;
}
.ai-big-idea__accent {
  color: var(--color-burgundy, #6B2838);
  font-weight: 700;
}

/* EV tiles — 4-up grid desktop, stack mobile */
.ai-big-idea__tiles {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin: 0 0 20px;
  border-collapse: separate;
  border-spacing: 0;
  width: 100%;
}
.ai-big-idea__tiles thead { display: none; }
.ai-big-idea__tiles tbody { display: contents; }
.ai-big-idea__tile {
  display: grid;
  grid-template-rows: auto auto auto;
  background: #fff;
  border: 1px solid rgba(0, 31, 61, 0.08);
  border-radius: 10px;
  padding: 16px 14px;
  text-align: center;
}
.ai-big-idea__tile--highlight {
  border-color: var(--color-amber, #D99B47);
  box-shadow: 0 0 0 2px rgba(217, 155, 71, 0.15);
}
.ai-big-idea__tile-label {
  font-family: var(--font-body);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(0, 31, 61, 0.55);
  margin-bottom: 8px;
}
.ai-big-idea__tile-value {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 26px;
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin-bottom: 4px;
}
.ai-big-idea__tile-value--neg { color: var(--color-burgundy, #6B2838); }
.ai-big-idea__tile-value--pos { color: var(--color-teal, #2E7D7A); }
.ai-big-idea__tile-note {
  font-family: var(--font-body);
  font-size: 11px;
  line-height: 1.5;
  color: rgba(0, 31, 61, 0.7);
}

@media (max-width: 720px) {
  .ai-big-idea__tiles { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 420px) {
  .ai-big-idea__tiles { grid-template-columns: 1fr; }
}

.ai-big-idea__closer {
  font-family: var(--font-serif-editorial);
  font-style: italic;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(0, 31, 61, 0.8);
  border-top: 1px solid rgba(107, 40, 56, 0.15);
  padding-top: 14px;
  margin: 0 0 14px;
}
.ai-big-idea__nod {
  background: rgba(107, 40, 56, 0.04);
  border-radius: 8px;
  padding: 10px 14px;
  font-family: var(--font-body);
  font-size: 12px;
  line-height: 1.6;
  color: rgba(0, 31, 61, 0.7);
}
.ai-big-idea__nod strong { color: var(--color-navy, #001F3D); }
.ai-big-idea__nod a {
  color: var(--color-burgundy, #6B2838);
  font-weight: 600;
  text-decoration: underline;
}

/* ===== Pattern — Tiebreaker chain (prose + ordered chips) ===== */
.ai-chain {
  list-style: none;
  padding: 0;
  margin: 20px 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}
.ai-chain__step {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 13px;
  color: var(--color-navy, #001F3D);
  background: rgba(220, 231, 243, 0.35);
  padding: 8px 14px 8px 8px;
  border-radius: 20px;
}
.ai-chain__step:not(:last-child)::after {
  content: '→';
  margin-left: 6px;
  color: rgba(0, 31, 61, 0.4);
}
.ai-chain__rank {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--color-burgundy, #6B2838);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
}

/* ===== Pattern C — Split dual card ===== */
.ai-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 14px;
}
.ai-split__card {
  border: 1px solid rgba(0, 31, 61, 0.1);
  border-radius: 10px;
  padding: 16px 18px;
  background: #fff;
}
.ai-split__card--emphasis {
  border-left: 3px solid var(--color-burgundy, #6B2838);
}
.ai-split__title {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 15px;
  color: var(--color-navy, #001F3D);
  margin: 0 0 8px;
}
.ai-split__body {
  font-family: var(--font-body);
  font-size: 12.5px;
  line-height: 1.6;
  color: rgba(0, 31, 61, 0.75);
  margin: 0;
}
.ai-split__anchor {
  background: linear-gradient(135deg, #FFF7F7 0%, var(--color-parchment, #F6EEDC) 100%);
  border-left: 3px solid var(--color-amber, #D99B47);
  border-radius: 0 10px 10px 0;
  padding: 14px 18px;
  font-family: var(--font-body);
  font-size: 13px;
  line-height: 1.65;
  color: rgba(0, 31, 61, 0.85);
}
.ai-split__anchor strong { color: var(--color-navy, #001F3D); }
@media (max-width: 640px) {
  .ai-split { grid-template-columns: 1fr; }
}

/* ===== Pattern D — Seat table ===== */
.ai-topic__inner--wide {
  max-width: 960px;
}
.ai-seat-table-wrap {
  border: 1px solid rgba(0, 31, 61, 0.08);
  border-radius: 10px;
  overflow: hidden;
  overflow-x: auto;
}
.ai-seat-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-body);
  font-size: 12.5px;
}
.ai-seat-table thead th {
  background: var(--color-navy, #001F3D);
  color: #fff;
  font-weight: 600;
  padding: 10px 14px;
  text-align: left;
}
.ai-seat-table thead th:nth-child(1) { width: 40%; }
.ai-seat-table tbody th,
.ai-seat-table tbody td {
  padding: 8px 14px;
  text-align: left;
  font-weight: 400;
  color: rgba(0, 31, 61, 0.8);
  border-bottom: 1px solid rgba(0, 31, 61, 0.08);
}
.ai-seat-table tbody tr:nth-child(odd) {
  background: rgba(220, 231, 243, 0.25);
}
.ai-seat-table tbody th {
  color: var(--color-navy, #001F3D);
  font-weight: 500;
}
.ai-seat-table tbody td:last-child {
  color: var(--color-burgundy, #6B2838);
  font-weight: 500;
}
.ai-seat-table__source {
  font-family: var(--font-body);
  font-size: 10.5px;
  color: rgba(0, 31, 61, 0.5);
  margin: 8px 0 0;
}

/* ===== MI Pivot flutter banner ===== */
.ai-mi-pivot {
  background: var(--gradient-accent-wide);
  background-size: 200% 100%;
  background-position: 0% 50%;
  color: #fff;
  padding: clamp(24px, 4vw, 36px) 24px;
  animation: mi-flag-flutter 14s ease-in-out infinite alternate;
}
.ai-mi-pivot__inner {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 24px;
}
.ai-mi-pivot__copy { flex: 1; }
.ai-mi-pivot__eyebrow {
  font-family: var(--font-body);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.78);
  margin-bottom: 10px;
}
.ai-mi-pivot__headline {
  font-family: var(--font-serif-editorial);
  font-weight: 700;
  font-size: clamp(20px, 3vw, 26px);
  line-height: 1.25;
  letter-spacing: -0.005em;
  margin: 0 0 8px;
  /* Override global h2 navy — banner is on accent gradient */
  color: #fff;
}
.ai-mi-pivot__body {
  font-family: var(--font-serif-editorial);
  font-size: 14px;
  line-height: 1.65;
  color: rgba(255, 255, 255, 0.9);
  margin: 0;
  max-width: 580px;
}
.ai-mi-pivot__cta {
  flex-shrink: 0;
  display: inline-block;
  background: #fff;
  color: var(--color-burgundy, #6B2838);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 14px;
  padding: 14px 22px;
  border-radius: 8px;
  text-decoration: none;
  letter-spacing: -0.01em;
  white-space: nowrap;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.ai-mi-pivot__cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}
.ai-mi-pivot__cta:focus-visible {
  outline: 2px solid var(--color-navy, #001F3D);
  outline-offset: 2px;
}
@media (max-width: 720px) {
  .ai-mi-pivot__inner { flex-direction: column; align-items: flex-start; }
}
@media (prefers-reduced-motion: reduce) {
  .ai-mi-pivot { animation: none; }
}

/* ===== Pattern E — Condition grid + callout ===== */
.ai-cond-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 14px;
}
.ai-cond-grid__card {
  border: 1px solid rgba(0, 31, 61, 0.08);
  border-radius: 10px;
  padding: 14px 16px;
  background: #fff;
}
.ai-cond-grid__title {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 13.5px;
  color: var(--color-navy, #001F3D);
  margin: 0 0 6px;
}
.ai-cond-grid__body {
  font-family: var(--font-body);
  font-size: 12px;
  line-height: 1.55;
  color: rgba(0, 31, 61, 0.72);
  margin: 0;
}
.ai-cond-note {
  background: var(--color-parchment, #F6EEDC);
  border-left: 3px solid var(--color-amber, #D99B47);
  border-radius: 0 10px 10px 0;
  padding: 14px 18px;
  font-family: var(--font-body);
  font-size: 13px;
  line-height: 1.65;
  color: rgba(0, 31, 61, 0.85);
}
.ai-cond-note strong { color: var(--color-navy, #001F3D); }
@media (max-width: 720px) {
  .ai-cond-grid { grid-template-columns: 1fr; }
}

/* ===== Pattern F — Horizontal timeline ===== */
.ai-timeline {
  list-style: none;
  padding: 0;
  margin: 20px 0 0;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0;
  position: relative;
}
.ai-timeline::before {
  content: '';
  position: absolute;
  top: 15px;
  left: 8%;
  right: 8%;
  height: 2px;
  background: linear-gradient(90deg, var(--color-pink, #E8476B) 0%, var(--color-burgundy, #6B2838) 100%);
  z-index: 0;
}
.ai-timeline__step {
  text-align: center;
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.ai-timeline__dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-burgundy, #6B2838);
  margin: 8px auto;
}
.ai-timeline__label {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 11.5px;
  color: var(--color-navy, #001F3D);
}
.ai-timeline__note {
  font-family: var(--font-body);
  font-size: 10.5px;
  color: rgba(0, 31, 61, 0.6);
  margin-top: 2px;
}
@media (max-width: 640px) {
  .ai-timeline {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  .ai-timeline::before { display: none; }
  .ai-timeline__step {
    flex-direction: row;
    align-items: center;
    gap: 12px;
    text-align: left;
  }
  .ai-timeline__dot { margin: 0; flex-shrink: 0; }
}

/* ===== Pattern G — Diagnostic prose + quiet quote ===== */
.ai-diagnostic__title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(22px, 3vw, 28px);
  line-height: 1.2;
  color: var(--color-navy, #001F3D);
  margin: 0 0 14px;
}
.ai-diagnostic__quote {
  background: rgba(220, 231, 243, 0.25);
  border-left: 2px solid var(--color-rose, #E8C4C9);
  padding: 14px 20px;
  margin: 18px 0 0;
}
.ai-diagnostic__quote blockquote {
  font-family: var(--font-serif-editorial);
  font-style: italic;
  font-size: 13.5px;
  line-height: 1.7;
  color: rgba(0, 31, 61, 0.75);
  margin: 0;
}

/* ===== Topic 12 — CTA stack ===== */
.ai-cta-stack {
  background: var(--color-parchment, #F6EEDC);
  padding: clamp(40px, 6vw, 64px) 24px clamp(32px, 5vw, 52px);
}
.ai-cta-stack__inner {
  max-width: 820px;
  margin: 0 auto;
}
.ai-cta-stack__intro {
  text-align: center;
  margin-bottom: 28px;
}
.ai-cta-stack__eyebrow {
  font-family: var(--font-body);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-burgundy, #6B2838);
  margin-bottom: 10px;
}
.ai-cta-stack__headline {
  font-family: var(--font-serif-editorial);
  font-weight: 700;
  font-size: clamp(22px, 3.2vw, 28px);
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--color-navy, #001F3D);
  margin: 0 0 10px;
}
.ai-cta-stack__body {
  font-family: var(--font-serif-editorial);
  font-size: 14.5px;
  line-height: 1.7;
  color: rgba(0, 31, 61, 0.78);
  max-width: 620px;
  margin: 0 auto;
}

.ai-cta-stack__primary,
.ai-cta-stack__secondary {
  display: flex;
  align-items: center;
  gap: 20px;
  text-decoration: none;
  border-radius: 12px;
  padding: 20px 24px;
  margin-bottom: 12px;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background-position 0.6s ease;
}
.ai-cta-stack__primary {
  background: var(--gradient-accent-wide);
  background-size: 200% 100%;
  background-position: 0% 50%;
  color: #fff;
}
.ai-cta-stack__primary:hover,
.ai-cta-stack__primary:focus-visible { background-position: 100% 50%; }
.ai-cta-stack__secondary {
  background: #fff;
  border: 1px solid rgba(0, 31, 61, 0.12);
  border-left: 3px solid var(--color-amber, #D99B47);
  color: var(--color-navy, #001F3D);
}
.ai-cta-stack__card-body { flex: 1; }
.ai-cta-stack__card-eyebrow {
  font-family: var(--font-body);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  margin-bottom: 6px;
}
.ai-cta-stack__primary .ai-cta-stack__card-eyebrow { color: rgba(255, 255, 255, 0.78); }
.ai-cta-stack__secondary .ai-cta-stack__card-eyebrow { color: var(--color-amber, #D99B47); }
.ai-cta-stack__card-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 17px;
  letter-spacing: -0.01em;
  margin-bottom: 4px;
}
.ai-cta-stack__primary .ai-cta-stack__card-title { font-size: 19px; }
.ai-cta-stack__card-sub {
  font-family: var(--font-serif-editorial);
  font-size: 13px;
  line-height: 1.55;
}
.ai-cta-stack__primary .ai-cta-stack__card-sub { color: rgba(255, 255, 255, 0.88); }
.ai-cta-stack__secondary .ai-cta-stack__card-sub { color: rgba(0, 31, 61, 0.72); }
.ai-cta-stack__card-arrow {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 14px;
  white-space: nowrap;
}
.ai-cta-stack__primary .ai-cta-stack__card-arrow { color: #fff; }
.ai-cta-stack__secondary .ai-cta-stack__card-arrow { color: var(--color-burgundy, #6B2838); }

.ai-cta-stack__tertiary {
  background: rgba(255, 255, 255, 0.5);
  border: 1px dashed rgba(0, 31, 61, 0.18);
  border-radius: 12px;
  padding: 14px 22px;
  margin-top: 6px;
}
.ai-cta-stack__tertiary-links {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  font-family: var(--font-heading);
  font-size: 13px;
}
.ai-cta-stack__tertiary-links a {
  color: var(--color-navy, #001F3D);
  text-decoration: none;
  border-bottom: 1px solid rgba(107, 40, 56, 0.3);
  padding-bottom: 1px;
}
.ai-cta-stack__tertiary-links a:hover,
.ai-cta-stack__tertiary-links a:focus-visible {
  border-bottom-color: var(--color-burgundy, #6B2838);
}
.ai-cta-stack__tertiary-note {
  color: rgba(0, 31, 61, 0.45);
  font-style: italic;
}
.ai-cta-stack__closer {
  text-align: center;
  font-family: var(--font-serif-editorial);
  font-style: italic;
  font-size: 12.5px;
  line-height: 1.6;
  color: rgba(0, 31, 61, 0.55);
  margin: 22px 0 0;
  padding-top: 18px;
  border-top: 1px solid rgba(0, 31, 61, 0.1);
}
.ai-cta-stack__closer a { color: var(--color-burgundy, #6B2838); }

@media (max-width: 640px) {
  .ai-cta-stack__primary,
  .ai-cta-stack__secondary { flex-direction: column; align-items: flex-start; }
  .ai-cta-stack__card-arrow { align-self: flex-end; }
}
@media (prefers-reduced-motion: reduce) {
  .ai-cta-stack__primary { animation: none; background-position: 0% 50%; }
  .ai-cta-stack__primary:hover,
  .ai-cta-stack__primary:focus-visible { background-position: 0% 50%; }
}

/* ===== Scroll reveal =====
   Opt-in via .js-reveal on <html> (added by about-imat.js). Without JS
   (crawlers, headless no-JS renders) every section stays visible by default. */
.js-reveal .ai-topic,
.js-reveal .ai-big-idea,
.js-reveal .ai-mi-pivot,
.js-reveal .ai-cta-stack {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.js-reveal .ai-topic.is-visible,
.js-reveal .ai-big-idea.is-visible,
.js-reveal .ai-mi-pivot.is-visible,
.js-reveal .ai-cta-stack.is-visible {
  opacity: 1;
  transform: translateY(0);
}
@media (prefers-reduced-motion: reduce) {
  .js-reveal .ai-topic,
  .js-reveal .ai-big-idea,
  .js-reveal .ai-mi-pivot,
  .js-reveal .ai-cta-stack {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ===== Focus visibility (a11y) ===== */
.ai-page a:focus-visible,
.ai-page button:focus-visible {
  outline: 2px solid var(--color-burgundy, #6B2838);
  outline-offset: 2px;
}
.ai-cta-stack__primary:focus-visible,
.ai-mi-pivot__cta:focus-visible {
  outline: 2px solid #fff;
  outline-offset: 3px;
  box-shadow: 0 0 0 5px var(--color-burgundy, #6B2838);
}