/* ==========================================================================
   PEPTIDESTX — ABOUT PAGE
   Layout only. Card/badge/accordion/button visuals are inherited unmodified
   from the approved Design System and Homepage components.
   ========================================================================== */

/* ---------------------------------------------------------------------
   1. HERO
   --------------------------------------------------------------------- */

.about-hero {
  background: var(--color-obsidian);
  padding-block: var(--space-30) var(--space-20);
  position: relative;
  overflow: hidden;
}

.about-hero__inner {
  max-width: 720px;
  margin-inline: auto;
  text-align: center;
  position: relative;
  z-index: 1;
}

.about-hero__eyebrow {
  display: block;
  margin-bottom: var(--space-5);
}

.about-hero__heading {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 48px;
  line-height: 52px;
  color: var(--color-white);
  margin-bottom: var(--space-5);
  animation: about-hero-fade-in 500ms var(--ease-out-expo) both;
}

.about-hero__subhead {
  font-family: var(--font-body);
  font-size: 18px;
  line-height: 28px;
  color: var(--color-graphite-300);
  max-width: 560px;
  margin-inline: auto;
  animation: about-hero-fade-in 500ms var(--ease-out-expo) 120ms both;
}

@keyframes about-hero-fade-in {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

.about-hero__graphic {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0.16;
  pointer-events: none;
}

.about-hero__graphic svg {
  width: 640px;
  max-width: none;
}

@media (prefers-reduced-motion: reduce) {
  .about-hero__heading,
  .about-hero__subhead {
    animation: none !important;
    opacity: 1 !important;
    transform: none !important;
  }
}

@media (max-width: 767px) {
  .about-hero {
    padding-block: var(--space-16) var(--space-12);
  }
  .about-hero__heading {
    font-size: 32px;
    line-height: 36px;
  }
  .about-hero__subhead {
    font-size: 16px;
    line-height: 24px;
  }
  .about-hero__graphic {
    opacity: 0.1;
  }
  .about-hero__graphic svg {
    width: 420px;
  }
}

/* ---------------------------------------------------------------------
   SHARED SECTION SCAFFOLDING
   --------------------------------------------------------------------- */

.about-section {
  padding-block: var(--space-20);
}

.about-section--tight {
  padding-block: var(--space-16);
}

.about-eyebrow {
  display: block;
  margin-bottom: var(--space-4);
}

.about-section__heading {
  font-family: var(--font-display);
  font-weight: 500;
  color: var(--color-obsidian);
  margin-bottom: var(--space-5);
}

.about-section__heading--on-dark {
  color: var(--color-white);
}

.about-section__heading--lg {
  font-size: 40px;
  line-height: 44px;
}

.about-section__heading--md {
  font-size: 36px;
  line-height: 42px;
}

@media (max-width: 767px) {
  .about-section {
    padding-block: var(--space-12);
  }
  .about-section--tight {
    padding-block: var(--space-10);
  }
  .about-section__heading--lg {
    font-size: 30px;
    line-height: 34px;
  }
  .about-section__heading--md {
    font-size: 26px;
    line-height: 32px;
  }
}

/* ---------------------------------------------------------------------
   2. COMPANY STORY / 5. QUALITY ASSURANCE PHILOSOPHY (split layouts)
   --------------------------------------------------------------------- */

.about-story {
  background: var(--color-white);
}

.about-quality {
  background: var(--color-obsidian);
}

.about-split {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--space-10);
  align-items: center;
}

.about-split__copy--right {
  grid-column: 7 / span 6;
}
.about-split__visual--left {
  grid-column: 1 / span 6;
}
.about-split__copy--left {
  grid-column: 1 / span 6;
}
.about-split__visual--right {
  grid-column: 7 / span 6;
}

.about-story__body p,
.about-quality__body p {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 26px;
  max-width: 480px;
  margin-bottom: var(--space-4);
}

.about-story__body p {
  color: var(--color-graphite-500);
}

.about-quality__body p {
  color: var(--color-graphite-300);
}

.about-story__visual,
.about-quality__visual {
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background: var(--color-cloud-grey);
}

.about-story__visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Quality philosophy 3-principle icon row (distinct from Homepage's 4-node process diagram) */
.about-quality__principles {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  background: var(--color-obsidian-elevated);
  border: 1px solid var(--color-graphite-border-dark);
  border-radius: var(--radius-md);
  padding: var(--space-8);
}

.about-principle {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
}

.about-principle__icon {
  width: 24px;
  height: 24px;
  color: var(--color-royal-violet);
  flex-shrink: 0;
}

.about-principle__title {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 15px;
  color: var(--color-white);
  margin-bottom: 2px;
}

.about-principle__text {
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 22px;
  color: var(--color-graphite-300);
}

@media (max-width: 1023px) {
  .about-split {
    display: block;
  }
  .about-split__copy--right,
  .about-split__visual--left,
  .about-split__copy--left,
  .about-split__visual--right {
    grid-column: auto;
  }
  .about-split__visual--left,
  .about-split__visual--right {
    margin-bottom: var(--space-8);
  }
}

/* ---------------------------------------------------------------------
   3. MISSION
   --------------------------------------------------------------------- */

.about-mission {
  background: var(--color-obsidian);
  text-align: center;
}

.about-mission__inner {
  max-width: 760px;
  margin-inline: auto;
}

.about-mission__statement {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 32px;
  line-height: 40px;
  color: var(--color-white);
}

@media (max-width: 767px) {
  .about-mission__statement {
    font-size: 22px;
    line-height: 30px;
  }
}

/* ---------------------------------------------------------------------
   4. CORE VALUES
   --------------------------------------------------------------------- */

.about-values {
  background: var(--color-white);
}

.about-values__heading {
  text-align: center;
  max-width: 600px;
  margin: 0 auto var(--space-12) auto;
}

.about-values__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.about-value-card {
  padding: var(--space-8);
  border: 1px solid var(--color-graphite-border-light);
  border-radius: var(--radius-md);
  transition: border-color var(--dur-base) var(--ease-out), transform var(--dur-base) var(--ease-out);
}

.about-value-card:hover {
  border-color: rgba(var(--color-royal-violet-rgb), 0.4);
  transform: translateY(-2px);
}

.about-value-card__icon {
  width: 28px;
  height: 28px;
  color: var(--color-obsidian);
  margin-bottom: var(--space-5);
  transition: color var(--dur-base) var(--ease-out);
}

.about-value-card:hover .about-value-card__icon {
  color: var(--color-royal-violet);
}

.about-value-card__title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 18px;
  color: var(--color-obsidian);
  margin-bottom: var(--space-2);
}

.about-value-card__text {
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 22px;
  color: var(--color-graphite-500);
}

@media (max-width: 1023px) {
  .about-values__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 767px) {
  .about-values__grid {
    grid-template-columns: 1fr;
    gap: var(--space-5);
  }
}

/* ---------------------------------------------------------------------
   6. THIRD-PARTY TESTING COMMITMENT
   --------------------------------------------------------------------- */

.about-testing {
  background: var(--color-white);
}

.about-testing__inner {
  max-width: 720px;
  margin-inline: auto;
  text-align: center;
}

.about-testing__body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 26px;
  color: var(--color-graphite-500);
  margin-bottom: var(--space-8);
}

.about-testing__badges {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
}

.about-testing__badges .trust-badge {
  flex: 1 1 220px;
  max-width: 260px;
  text-align: left;
}

@media (max-width: 767px) {
  .about-testing__badges {
    flex-direction: column;
    align-items: stretch;
  }
  .about-testing__badges .trust-badge {
    max-width: none;
  }
}

/* ---------------------------------------------------------------------
   7. RESEARCH STANDARDS
   --------------------------------------------------------------------- */

.about-standards {
  background: var(--color-cloud-grey);
}

.about-standards__grid {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: var(--space-10);
  align-items: start;
}

.about-standards__intro {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 26px;
  color: var(--color-graphite-500);
  margin-bottom: var(--space-5);
}

.about-standards__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.about-standards__item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 24px;
  color: var(--color-obsidian);
}

.about-standards__item svg {
  width: 16px;
  height: 16px;
  color: var(--color-verified-green);
  flex-shrink: 0;
  margin-top: 4px;
}

@media (max-width: 1023px) {
  .about-standards__grid {
    display: block;
  }
  .about-standards__intro {
    margin-bottom: var(--space-8);
  }
}

/* ---------------------------------------------------------------------
   8. WHY RESEARCHERS CHOOSE PEPTIDESTX
   --------------------------------------------------------------------- */

.about-why {
  background: var(--color-white);
}

.about-why__heading {
  text-align: center;
  max-width: 600px;
  margin: 0 auto var(--space-12) auto;
}

.about-why__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
}

.about-why__item {
  text-align: center;
}

.about-why__item svg {
  width: 28px;
  height: 28px;
  color: var(--color-graphite-500);
  margin-bottom: var(--space-4);
}

.about-why__item-title {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 15px;
  color: var(--color-obsidian);
  margin-bottom: var(--space-2);
}

.about-why__item-text {
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 22px;
  color: var(--color-graphite-500);
  margin-bottom: var(--space-3);
}

@media (max-width: 767px) {
  .about-why__grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
}

/* ---------------------------------------------------------------------
   9. TIMELINE (net-new component)
   --------------------------------------------------------------------- */

.about-timeline {
  background: var(--color-obsidian);
  overflow: hidden;
}

.about-timeline__heading {
  text-align: center;
  max-width: 600px;
  margin: 0 auto var(--space-16) auto;
}

.about-timeline__track {
  position: relative;
  display: flex;
  justify-content: space-between;
  padding-block: var(--space-16);
}

.about-timeline__line {
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 1px;
  background: var(--color-graphite-border-dark);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 900ms var(--ease-out);
}

.about-timeline.is-revealed .about-timeline__line {
  transform: scaleX(1);
}

.about-timeline__node {
  position: relative;
  flex: 1;
  display: flex;
  justify-content: center;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 400ms var(--ease-out-expo), transform 400ms var(--ease-out-expo);
}

.about-timeline.is-revealed .about-timeline__node {
  opacity: 1;
  transform: translateY(0);
}

.about-timeline.is-revealed .about-timeline__node:nth-child(1) { transition-delay: 100ms; }
.about-timeline.is-revealed .about-timeline__node:nth-child(2) { transition-delay: 300ms; }
.about-timeline.is-revealed .about-timeline__node:nth-child(3) { transition-delay: 500ms; }
.about-timeline.is-revealed .about-timeline__node:nth-child(4) { transition-delay: 700ms; }
.about-timeline.is-revealed .about-timeline__node:nth-child(5) { transition-delay: 900ms; }

.about-timeline__marker {
  position: relative;
  z-index: 1;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-obsidian);
  border: 2px solid var(--color-white);
  flex-shrink: 0;
}

.about-timeline__node--origin .about-timeline__marker {
  background: var(--color-royal-violet);
  border-color: var(--color-royal-violet);
}

.about-timeline__content {
  position: absolute;
  width: 180px;
  text-align: center;
  left: 50%;
  transform: translateX(-50%);
}

.about-timeline__node--above .about-timeline__content {
  bottom: calc(100% + 20px);
}

.about-timeline__node--below .about-timeline__content {
  top: calc(100% + 20px);
}

.about-timeline__year {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-royal-violet);
  margin-bottom: 6px;
}

.about-timeline__label {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 14px;
  color: var(--color-white);
  margin-bottom: 4px;
}

.about-timeline__desc {
  font-family: var(--font-body);
  font-size: 12px;
  line-height: 18px;
  color: var(--color-graphite-300);
}

@media (prefers-reduced-motion: reduce) {
  .about-timeline__line,
  .about-timeline__node {
    transition: none;
    transform: none;
    opacity: 1;
  }
}

/* Mobile: rotate to a vertical left-aligned timeline */
@media (max-width: 767px) {
  .about-timeline__track {
    display: block;
    padding-block: var(--space-4);
  }

  .about-timeline__line {
    left: 5px;
    top: 0;
    bottom: 0;
    right: auto;
    width: 1px;
    height: 100%;
    transform: scaleY(0);
    transform-origin: top;
  }

  .about-timeline.is-revealed .about-timeline__line {
    transform: scaleY(1);
  }

  .about-timeline__node {
    justify-content: flex-start;
    align-items: flex-start;
    gap: var(--space-5);
    padding-left: 0;
    margin-bottom: var(--space-8);
  }

  .about-timeline__node:last-child {
    margin-bottom: 0;
  }

  .about-timeline__marker {
    margin-top: 4px;
  }

  .about-timeline__content {
    position: static;
    width: auto;
    text-align: left;
    transform: none;
    margin-left: var(--space-5);
    flex: 1;
  }
}

/* ---------------------------------------------------------------------
   11. CALL TO ACTION
   --------------------------------------------------------------------- */

.about-cta {
  background: var(--color-obsidian);
  text-align: center;
  padding-block: var(--space-20);
}

.about-cta__heading {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 28px;
  line-height: 34px;
  color: var(--color-white);
  margin-bottom: var(--space-3);
}

.about-cta__subtext {
  font-family: var(--font-body);
  font-size: 15px;
  color: var(--color-graphite-300);
  margin-bottom: var(--space-8);
}

.about-cta__row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-8);
  flex-wrap: wrap;
}

.about-cta__row .text-link {
  color: var(--color-white);
}

@media (max-width: 767px) {
  .about-cta {
    padding-block: var(--space-14);
  }
  .about-cta__row {
    flex-direction: column;
    gap: var(--space-4);
    align-items: stretch;
  }
  .about-cta__row .btn {
    width: 100%;
    text-align: center;
  }
  .about-cta__row .text-link {
    justify-content: center;
  }
}

/* ==========================================================================
   WHAT WE STAND FOR (replaces the fake-dated milestones timeline)
   Reuses .about-timeline's dark section background/heading styles above —
   only the content grid below is new.
   ========================================================================== */

.about-commitments__grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: var(--space-8);
}

.about-commitments__item {
  text-align: center;
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 500ms var(--ease-out-expo), transform 500ms var(--ease-out-expo);
}

.about-timeline.is-revealed .about-commitments__item {
  opacity: 1;
  transform: translateY(0);
}

.about-commitments__item:nth-child(1) { transition-delay: 0ms; }
.about-commitments__item:nth-child(2) { transition-delay: 100ms; }
.about-commitments__item:nth-child(3) { transition-delay: 200ms; }
.about-commitments__item:nth-child(4) { transition-delay: 300ms; }
.about-commitments__item:nth-child(5) { transition-delay: 400ms; }

.about-commitments__item svg {
  width: 32px;
  height: 32px;
  color: var(--color-royal-violet);
  margin-bottom: var(--space-4);
}

.about-commitments__title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 17px;
  color: var(--color-white);
  margin-bottom: var(--space-2);
}

.about-commitments__text {
  font-family: var(--font-body);
  font-size: 13px;
  line-height: 20px;
  color: var(--color-graphite-300);
}

@media (prefers-reduced-motion: reduce) {
  .about-commitments__item {
    opacity: 1 !important;
    transform: none !important;
  }
}

@media (max-width: 1023px) {
  .about-commitments__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    row-gap: var(--space-10);
  }
}

@media (max-width: 767px) {
  .about-commitments__grid {
    grid-template-columns: minmax(0, 1fr);
  }
}