/* ==========================================================================
   About Page — Cereble AI
   ========================================================================== */

/* -- Section 1: Page Hero ------------------------------------------------- */

.about-hero {
  background-color: var(--surface-mist);
  padding-block: var(--space-section);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.about-hero__illustration {
  position: absolute;
  inset: 0;
  opacity: 0.07;
  pointer-events: none;
  display: flex;
  align-items: center;
  justify-content: center;
}

.about-hero__illustration svg {
  width: 100%;
  height: 100%;
}

.about-hero__container {
  position: relative;
  z-index: 1;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

.about-hero__badge {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: var(--fw-semibold);
  text-transform: uppercase;
  letter-spacing: var(--ls-badge);
  /* --cereble-blue-accessible on --surface-mist is 4.16:1 — fails AA at small size.
     Using --text-primary (~17:1) for reliable contrast, matching home hero badge. */
  color: var(--text-primary);
  margin-block-end: var(--space-md);
}

.about-hero__heading {
  font-family: var(--font-heading);
  font-size: var(--text-h1);
  font-weight: var(--fw-extrabold);
  line-height: var(--lh-heading-h1);
  color: var(--text-primary);
  margin-block-end: var(--space-xl);
}

.about-hero__body {
  font-family: var(--font-body);
  font-size: var(--text-lg);
  line-height: var(--lh-body);
  color: var(--color-text-light);
}

/* -- Section 2: Founding Story --------------------------------------------- */

.founding-story {
  background-color: var(--page-white);
  padding-block: var(--space-section);
}

.founding-story__container {
  width: 100%;
  /* --container-max instead of spec's --container-narrow: two-column grid
     with illustration requires full-width container — matches home .about__container */
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

.founding-story__heading {
  font-family: var(--font-heading);
  font-size: var(--text-h2);
  font-weight: var(--fw-bold);
  line-height: var(--lh-heading-h2);
  color: var(--text-primary);
  text-align: center;
  margin-block-end: var(--space-xl);
}

/* Two-column grid — matches home .about__content pattern */
.founding-story__content {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
  align-items: start;
}

.founding-story__text {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--lh-body);
  color: var(--text-primary);
}

.founding-story__text p + p {
  margin-block-start: var(--space-md);
}

.founding-story__aside {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.founding-story__illustration {
  display: flex;
  justify-content: center;
  align-items: center;
}

.founding-story__illustration svg {
  width: 100%;
  max-width: 320px;
  height: auto;
}

.founding-story__kicker {
  background-color: var(--surface-blue);
  border-left: 3px solid var(--cereble-blue-accessible); /* accent border — 3px is a systemic raw value (no token exists) */
  border-radius: var(--radius-md);
  padding: var(--space-md) var(--space-lg);
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  line-height: var(--lh-body);
  color: var(--text-primary);
}

.founding-story__kicker p {
  margin: 0;
}

/* Founding Story — tablet and up: two columns */
@media (min-width: 768px) {
  .founding-story__heading {
    font-size: var(--text-3xl);
  }

  .founding-story__content {
    grid-template-columns: 55fr 45fr;
    gap: var(--space-2xl);
    align-items: center;
  }

  .founding-story__text {
    font-size: var(--text-lg);
  }

  .founding-story__kicker {
    font-size: var(--text-base);
  }
}

/* -- Section 3: Mission & Values ------------------------------------------ */

.mission-values {
  background-color: var(--surface-blue);
  padding-block: var(--space-section);
}

.mission-values__container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

.mission-values__eyebrow {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: var(--fw-semibold);
  text-transform: uppercase;
  letter-spacing: var(--ls-badge);
  color: var(--text-primary);
  text-align: center;
  margin-block-end: var(--space-sm);
}

.mission-values__heading {
  font-family: var(--font-heading);
  font-size: var(--text-h2);
  font-weight: var(--fw-bold);
  line-height: var(--lh-heading-h2);
  color: var(--text-primary);
  text-align: center;
  margin-block-end: var(--space-3xl);
}

/* Featured card — Teachers, Not Algorithms */

.mission-values__featured {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-lg);
  background-color: var(--page-white);
  border-left: 3px solid var(--cereble-blue-accessible); /* accent border — 3px is a systemic raw value (no token exists) */
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: var(--space-2xl);
  margin-block-end: var(--space-2xl);
}

.mission-values__featured-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 80px; /* 56px icon + padding — no token exists for icon containers */
  height: 80px;
  flex-shrink: 0;
  background-color: var(--surface-blue);
  border-radius: var(--radius-md);
  color: var(
    --cereble-blue-accessible
  ); /* 3.99:1 on --surface-blue — passes WCAG 1.4.11 non-text contrast */
  font-size: 2rem;
}

.mission-values__featured-title {
  font-family: var(--font-heading);
  font-size: var(--text-h3);
  font-weight: var(--fw-bold);
  line-height: var(--lh-heading-h3);
  color: var(--text-primary);
  margin-block-end: var(--space-sm);
}

.mission-values__featured-desc {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--lh-body);
  color: var(--color-text-light);
}

/* Supporting cards — 3-column grid */

.mission-values__grid {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: var(--space-xl);
}

.mission-values__card {
  background-color: var(--page-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: var(--space-2xl);
  text-align: center;
}

.mission-values__card-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 64px; /* 40px icon + padding — no token exists for icon containers */
  height: 64px;
  margin-inline: auto;
  margin-block-end: var(--space-md);
  border-radius: var(--radius-md);
  color: var(--cereble-blue);
  font-size: var(--icon-md);
}

.mission-values__card-icon--mist {
  background-color: var(--surface-mist);
}

.mission-values__card-icon--lilac {
  background-color: var(--surface-lilac);
  color: var(
    --cereble-blue-accessible
  ); /* 3.99:1 on --surface-lilac — passes WCAG 1.4.11 non-text contrast */
}

.mission-values__card-title {
  font-family: var(--font-heading);
  font-size: var(--text-h3);
  font-weight: var(--fw-bold);
  line-height: var(--lh-heading-h3);
  color: var(--text-primary);
  margin-block-end: var(--space-sm);
}

.mission-values__card-desc {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--lh-body);
  color: var(--color-text-light);
  max-width: 280px; /* line-length cap for 3-column card layout */
  margin-inline: auto;
}

/* Mission & Values — tablet and up */
@media (min-width: 768px) {
  .mission-values__featured {
    flex-direction: row;
    align-items: flex-start;
    gap: var(--space-xl);
  }

  .mission-values__featured-desc {
    font-size: var(--text-lg);
  }

  .mission-values__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* -- Section 4: Our Evaluators -------------------------------------------- */

.evaluators {
  background-color: var(--surface-mist);
  padding-block: var(--space-section);
}

.evaluators__container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

.evaluators__eyebrow {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: var(--fw-semibold);
  text-transform: uppercase;
  letter-spacing: var(--ls-badge);
  color: var(--text-primary);
  text-align: center;
  margin-block-end: var(--space-sm);
}

.evaluators__heading {
  font-family: var(--font-heading);
  font-size: var(--text-h2);
  font-weight: var(--fw-bold);
  line-height: var(--lh-heading-h2);
  color: var(--text-primary);
  text-align: center;
  margin-block-end: var(--space-xl);
}

.evaluators__intro {
  font-family: var(--font-body);
  font-size: var(--text-lg);
  line-height: var(--lh-body);
  color: var(--color-text-light);
  text-align: center;
  max-width: var(--container-narrow);
  margin-inline: auto;
  margin-block-end: var(--space-2xl);
}

/* Filter pills */

.evaluators__filters {
  display: flex;
  justify-content: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
  margin-block-end: var(--space-2xl);
}

.evaluators__filter {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: var(--fw-medium);
  background-color: var(--page-white);
  color: var(--text-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  padding: var(--space-sm) var(--space-lg);
  min-height: 44px; /* touch target */
  cursor: pointer;
  transition:
    background-color var(--transition-fast),
    color var(--transition-fast),
    box-shadow var(--transition-fast);
}

.evaluators__filter:hover {
  box-shadow: var(--shadow-sm);
}

.evaluators__filter:focus-visible {
  outline: 2px solid var(--cereble-blue-accessible);
  outline-offset: 2px;
  box-shadow: var(--shadow-sm);
}

.evaluators__filter[aria-pressed="true"] {
  background-color: var(--cereble-blue-accessible);
  color: var(--page-white);
  border-color: transparent;
}

/* Carousel viewport (mobile scroll-snap fallback) */

.evaluators__viewport {
  overflow-x: auto;
  overflow-y: hidden;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none; /* Firefox */
}

.evaluators__viewport::-webkit-scrollbar {
  display: none; /* Chrome/Safari */
}

/* Track: horizontal flex for mobile carousel */

.evaluators__track {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  gap: var(--space-lg);
}

/* When JS enhances (mobile), slide via transform */
.evaluators__track[data-carousel-enhanced] {
  transition: transform var(--transition-slow);
}

/* Card base */

.evaluators__card {
  background-color: var(--page-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: var(--space-xl) var(--space-lg) var(--space-lg);
  text-align: center;
  flex: 0 0 85%; /* mobile: one card + peek */
  scroll-snap-align: start;
  min-width: 0;
}

/* Photo placeholder */

.evaluators__photo {
  width: 96px; /* spec: 96px circle — no token exists for avatar sizes */
  height: 96px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-inline: auto;
  margin-block-end: var(--space-lg);
  font-size: 3rem;
}

.evaluators__photo--cbse {
  background-color: var(--surface-blue);
  color: var(
    --cereble-blue-accessible
  ); /* 3.99:1 on --surface-blue — passes WCAG 1.4.11 non-text contrast */
}

.evaluators__photo--icse {
  background-color: var(--surface-lilac);
  color: var(
    --cereble-lilac
  ); /* 3.48:1 on --surface-lilac — passes WCAG 1.4.11 non-text contrast (3:1 threshold for large graphics) */
}

/* Name */

.evaluators__name {
  font-family: var(--font-heading);
  font-size: var(--text-h3);
  font-weight: var(--fw-bold);
  line-height: var(--lh-heading-h3);
  color: var(--text-primary);
  margin-block-end: var(--space-sm);
}

/* Board badge pill */

.evaluators__badge {
  display: inline-block;
  font-family: var(--font-body);
  font-size: var(--text-badge);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-badge);
  text-transform: uppercase;
  border-radius: var(--radius-full);
  padding: var(--space-xs) var(--space-md);
  margin-block-end: var(--space-md);
}

.evaluators__badge--cbse {
  background-color: var(--surface-blue);
  color: #2b6299; /* --cereble-blue darkened for WCAG AA 4.5:1 on --surface-blue (#EBF2FB) — ~5.2:1 */
}

.evaluators__badge--icse {
  background-color: var(--surface-lilac);
  color: #6b3fa0; /* --cereble-lilac darkened for WCAG AA 4.5:1 on --surface-lilac (#F5EEFB) — ~4.8:1 */
}

/* About line */

.evaluators__about {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  line-height: var(--lh-body);
  color: var(--color-text-light);
  margin: 0;
}

/* Dot navigation (JS-generated) */

.evaluators__dots {
  display: flex;
  justify-content: center;
  gap: var(--space-sm);
  margin-block-start: var(--space-xl);
  padding: 0;
  margin-block-end: 0;
  list-style: none;
}

.evaluators__dot {
  width: 10px;
  height: 10px;
  border-radius: var(--radius-full);
  border: none;
  background-color: transparent;
  cursor: pointer;
  padding: 0;
  min-width: 44px; /* touch target */
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.evaluators__dot::after {
  content: "";
  width: 10px;
  height: 10px;
  border-radius: var(--radius-full);
  background-color: var(--color-border);
  transition: background-color var(--transition-base);
}

.evaluators__dot:hover::after,
.evaluators__dot:focus-visible::after {
  background-color: var(--cereble-blue);
}

.evaluators__dot[aria-current="true"]::after {
  background-color: var(--cereble-blue);
}

/* Scroll-reveal animation — only active when JS adds [data-animate] */

[data-animate] .evaluators__card {
  opacity: 0;
  transform: translateY(20px);
}

[data-animate] .evaluators__card.evaluators__card--visible {
  opacity: 1;
  transform: translateY(0);
  transition:
    opacity 400ms ease,
    transform 400ms ease;
}

/* Staggered delays for 6 cards */
[data-animate] .evaluators__card:nth-child(1) {
  transition-delay: 0ms;
}
[data-animate] .evaluators__card:nth-child(2) {
  transition-delay: 50ms;
}
[data-animate] .evaluators__card:nth-child(3) {
  transition-delay: 100ms;
}
[data-animate] .evaluators__card:nth-child(4) {
  transition-delay: 150ms;
}
[data-animate] .evaluators__card:nth-child(5) {
  transition-delay: 200ms;
}
[data-animate] .evaluators__card:nth-child(6) {
  transition-delay: 250ms;
}

/* Desktop: 3x2 grid, no carousel */
@media (min-width: 768px) {
  .evaluators {
    min-height: 85vh; /* full-viewport feel on 15" laptops */
    display: flex;
    align-items: center;
  }

  .evaluators__viewport {
    overflow: visible;
    scroll-snap-type: none;
  }

  .evaluators__track {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
  }

  .evaluators__card {
    flex: none;
    scroll-snap-align: unset;
  }
}

/* Reduced motion: disable all animations and carousel transitions */
@media (prefers-reduced-motion: reduce) {
  .evaluators__track[data-carousel-enhanced] {
    transition: none;
  }

  [data-animate] .evaluators__card {
    opacity: 1;
    transform: none;
  }

  .evaluators__dot::after {
    transition: none;
  }

  .evaluators__filter {
    transition: none;
  }
}

/* -- Section 6: CTA Section ----------------------------------------------- */

.about-cta {
  background-color: var(--accent-dark);
}

.about-cta__container {
  max-width: var(--container-narrow);
  margin-inline: auto;
  padding-inline: var(--container-padding);
  padding-block: var(--space-section);
  text-align: center;
}

.about-cta__heading {
  font-family: var(--font-heading);
  font-size: var(--text-h2);
  font-weight: var(--fw-bold);
  line-height: var(--lh-heading-h2);
  color: var(--color-text-on-dark);
  margin: 0 0 var(--space-lg);
}

.about-cta__body {
  font-family: var(--font-body);
  font-size: var(--text-lg);
  line-height: var(--lh-body);
  color: var(--color-text-on-dark-muted);
  margin: 0 0 var(--space-xl);
}

.about-cta__actions {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-lg);
}

.about-cta__cta {
  font-family: var(--font-body);
  font-size: var(--text-base);
  cursor: pointer;
}

.about-cta__cta--primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: var(--space-md) var(--space-2xl);
  background: var(--gradient-brand-accessible);
  color: var(--color-text-on-dark);
  font-weight: var(--fw-semibold);
  border-radius: var(--radius-full);
  text-decoration: none;
  transition:
    opacity var(--transition-base),
    box-shadow var(--transition-base);
}

.about-cta__cta--primary:hover,
.about-cta__cta--primary:focus-visible {
  opacity: 0.9;
  box-shadow: var(--shadow-md);
}

.about-cta__cta--primary:focus-visible {
  outline: 2px solid var(--color-text-on-dark);
  outline-offset: 3px;
}

.about-cta__cta--secondary {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: var(--color-text-on-dark);
  font-weight: var(--fw-medium);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--transition-fast);
}

.about-cta__cta--secondary:hover,
.about-cta__cta--secondary:focus-visible {
  color: var(--color-brand-blue-light);
}

.about-cta__cta--secondary:focus-visible {
  outline: 2px solid var(--color-text-on-dark);
  outline-offset: 3px;
}

@media (min-width: 480px) {
  .about-cta__actions {
    flex-direction: row;
    justify-content: center;
    flex-wrap: wrap;
  }
}

/* CTA Section — reduced motion */
@media (prefers-reduced-motion: reduce) {
  .about-cta__cta--primary,
  .about-cta__cta--secondary {
    transition: none;
  }
}