.page-about {
  background: var(--color-cream);
  color: var(--color-ink);
  font-family: var(--font-body);
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.15;
  margin: 0 0 var(--space-md);
  text-transform: uppercase;
  color: var(--color-deep-green);
}

.page-about h1 {
  font-size: clamp(2rem, 6vw, 3.5rem);
  letter-spacing: 0.02em;
  margin-bottom: var(--space-sm);
}

.page-about h2 {
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  margin-bottom: var(--space-md);
}

.page-about h3 {
  font-size: 1.2rem;
  margin-bottom: 0.25rem;
}

.page-about .ab-kicker {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-deep-green);
  margin: 0 0 var(--space-sm);
}

.page-about .ab-kicker--section {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--color-deep-green);
  color: var(--color-cream);
  padding: 0.3rem 0.6rem;
  letter-spacing: 0.1em;
}

.page-about a {
  color: var(--color-deep-green);
}

.page-about button {
  font-family: inherit;
}

.page-about .ab-hero {
  position: relative;
  padding: var(--space-lg) 0;
  border-bottom: 3px solid var(--color-deep-green);
  background:
    linear-gradient(120deg, rgba(212, 175, 55, 0.18), transparent 42%),
    radial-gradient(circle at 84% 18%, rgba(11, 61, 46, 0.1), transparent 44%),
    var(--color-cream);
}

.page-about .ab-crumbs {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--space-lg) var(--space-lg);
}

.page-about .ab-crumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  padding: 0;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.page-about .ab-crumbs a {
  color: var(--color-deep-green);
  text-decoration-color: var(--color-gold);
  text-underline-offset: 3px;
}

.page-about .ab-crumbs li + li::before {
  content: "/";
  margin-right: 0.5rem;
  color: var(--color-gray-green);
}

.page-about .ab-hero-inner {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--space-lg);
  display: grid;
  gap: var(--space-lg);
  grid-template-columns: minmax(0, 1fr);
}

.page-about .ab-hero-content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.page-about .ab-hero-tag {
  margin: 0 0 var(--space-md);
}

.page-about .ab-hero-lead {
  font-size: 1.08rem;
  line-height: 1.7;
  max-width: 38rem;
  margin: 0 0 var(--space-lg);
  color: var(--color-ink);
}

.page-about .ab-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.page-about .ab-hero-score {
  align-self: end;
  position: relative;
  background:
    linear-gradient(135deg, rgba(212, 175, 55, 0.14), transparent 60%),
    var(--color-deep-green);
  color: var(--color-cream);
  border: 1px solid var(--color-gold);
  padding: 1.5rem 1.75rem;
  transform: rotate(1.4deg);
  box-shadow:
    10px 10px 0 rgba(11, 61, 46, 0.12),
    0 0 0 4px rgba(245, 241, 232, 0.6);
}

.page-about .ab-hero-score::after {
  content: "";
  position: absolute;
  inset: 6px;
  border: 1px solid rgba(212, 175, 55, 0.4);
  pointer-events: none;
}

.page-about .ab-hero-score-label {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--color-light-gold);
  margin: 0 0 0.4rem;
}

.page-about .ab-hero-score-num {
  font-family: var(--font-mono);
  font-size: clamp(2.4rem, 7vw, 3.6rem);
  font-weight: 700;
  line-height: 1;
  color: var(--color-gold);
  margin: 0 0 0.4rem;
  letter-spacing: -0.04em;
}

.page-about .ab-hero-score-caption {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: rgba(245, 241, 232, 0.8);
  margin: 0;
}

.page-about .ab-origin {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: var(--space-xl) var(--space-lg);
  display: grid;
  gap: var(--space-xl);
  grid-template-columns: minmax(0, 1fr);
}

.page-about .ab-origin-copy {
  max-width: 42rem;
}

.page-about .ab-lead {
  font-size: 1.1rem;
  line-height: 1.65;
  color: var(--color-ink);
}

.page-about .ab-origin-copy p {
  line-height: 1.75;
  margin-bottom: 1rem;
}

.page-about .ab-origin-link,
.page-about .ab-principle-link {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  text-decoration: none;
  border-bottom: 2px solid var(--color-gold);
  padding-bottom: 0.2rem;
  font-weight: 700;
  display: inline-block;
}

.page-about .ab-figure {
  margin: 0;
}

.page-about .ab-figure img {
  max-width: 100%;
  height: auto;
  display: block;
}

.page-about .ab-figure figcaption {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--color-tan);
  margin-top: 0.7rem;
  letter-spacing: 0.08em;
}

.page-about .ab-figure--origin {
  position: relative;
}

.page-about .ab-figure--origin img {
  border: 1px solid var(--color-tan);
  filter: saturate(0.28) sepia(0.18);
  box-shadow: 14px 14px 0 rgba(11, 61, 46, 0.16);
  transform: rotate(-0.5deg);
}

.page-about .ab-milestones {
  background:
    linear-gradient(180deg, var(--color-cream) 0%, rgba(242, 227, 160, 0.32) 100%);
  border-top: 1px solid var(--color-gray-green);
  border-bottom: 1px solid var(--color-gray-green);
  padding: var(--space-xl) 0;
}

.page-about .ab-milestones-intro {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.page-about .ab-milestones-intro > p:last-child {
  max-width: 40rem;
  line-height: 1.7;
}

.page-about .ab-timeline {
  --ab-tl-pad: 56px;
  --ab-tl-line-center: 26px;
  --ab-tl-line-w: 12px;
  position: relative;
  max-width: 900px;
  margin: var(--space-xl) auto 0;
  padding: 0 var(--space-lg) 0 var(--ab-tl-pad);
}

.page-about .ab-timeline-line {
  position: absolute;
  left: calc(var(--ab-tl-line-center) - var(--ab-tl-line-w) / 2);
  top: 0;
  bottom: 0;
  width: var(--ab-tl-line-w);
  height: 100%;
  overflow: visible;
  color: var(--color-gray-green);
}

.page-about .ab-tl-item {
  position: relative;
  background: var(--color-white);
  border: 1px solid rgba(11, 61, 46, 0.18);
  border-left: 3px solid var(--color-deep-green);
  padding: 1rem 1.15rem 1rem 1.25rem;
  margin-bottom: 1.25rem;
  box-shadow: 4px 4px 0 rgba(11, 61, 46, 0.06);
  border-radius: 0 2px 2px 0;
  transition: border-color var(--ease), box-shadow var(--ease);
}

.page-about .ab-tl-item::before {
  content: "";
  position: absolute;
  left: calc(-1 * var(--ab-tl-pad) + var(--ab-tl-line-center));
  transform: translateX(-50%);
  top: 1.55rem;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-gold);
  border: 3px solid var(--color-cream);
  box-shadow:
    0 0 0 2px var(--color-gold),
    0 0 18px rgba(212, 175, 55, 0.45);
}

.page-about .ab-tl-item:hover {
  border-color: var(--color-gold);
  box-shadow:
    0 0 0 1px var(--color-gold),
    6px 6px 0 rgba(212, 175, 55, 0.16),
    0 0 24px rgba(212, 175, 55, 0.16);
}

.page-about .ab-tl-item:hover .ab-tl-era {
  color: var(--color-copper);
  text-shadow: 0 0 14px rgba(212, 175, 55, 0.55);
}

.page-about .ab-tl-era {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-deep-green);
  margin: 0 0 0.25rem;
}

.page-about .ab-tl-heading {
  font-size: 1.2rem;
  color: var(--color-ink);
}

.page-about .ab-tl-summary {
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--color-ink);
  margin: 0 0 0.6rem;
}

.page-about .ab-tl-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-deep-green);
  background: transparent;
  border: 1px solid rgba(11, 61, 46, 0.25);
  border-radius: 2px;
  padding: 0.34rem 0.7rem;
  cursor: pointer;
  transition:
    color var(--ease),
    border-color var(--ease),
    background var(--ease);
}

.page-about .ab-tl-toggle:hover {
  background: var(--color-light-gold);
  border-color: var(--color-gold);
  color: var(--color-copper);
}

.page-about .ab-tl-toggle-icon::before {
  content: "−";
  font-weight: 700;
}

.page-about .ab-tl-toggle[aria-expanded="false"] .ab-tl-toggle-icon::before {
  content: "+";
}

.page-about .ab-tl-panel {
  margin-top: 0.85rem;
  padding: 0.85rem 1rem;
  background: var(--color-light-gold);
  border-left: 3px solid var(--color-gold);
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--color-ink);
}

.page-about .ab-tl-toggle[aria-expanded="false"] + .ab-tl-panel {
  display: none;
}

.page-about .ab-tl-item--now {
  border-left-color: var(--color-dark-red);
}

.page-about .ab-tl-item--now .ab-tl-era {
  color: var(--color-dark-red);
}

.page-about .ab-figure--devices {
  max-width: 620px;
  margin: var(--space-xl) auto 0;
  padding: 0 var(--space-lg);
  transform: rotate(-0.7deg);
}

.page-about .ab-figure--devices img {
  border: 1px solid var(--color-gray-green);
  box-shadow: 10px 10px 0 rgba(11, 61, 46, 0.1);
}

.page-about .ab-data {
  background:
    radial-gradient(circle at 85% 15%, rgba(212, 175, 55, 0.16), transparent 38%),
    var(--color-deep-green);
  color: var(--color-cream);
  padding: var(--space-xl) var(--space-lg);
}

.page-about .ab-data-inner {
  max-width: var(--content-max);
  margin: 0 auto;
}

.page-about .ab-data .ab-kicker--section {
  background: var(--color-gold);
  color: var(--color-deep-green);
}

.page-about .ab-data h2 {
  color: var(--color-cream);
  border-bottom: 2px solid rgba(212, 175, 55, 0.5);
  padding-bottom: 0.6rem;
  display: inline-block;
}

.page-about .ab-data-lead {
  max-width: 40rem;
  color: rgba(245, 241, 232, 0.86);
  line-height: 1.7;
  margin-bottom: var(--space-lg);
}

.page-about .ab-data-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
}

.page-about .ab-data-cell {
  position: relative;
  background: rgba(245, 241, 232, 0.05);
  border: 1px solid rgba(212, 175, 55, 0.42);
  padding: 1.25rem 1rem;
  border-radius: 2px;
}

.page-about .ab-data-cell::after {
  content: "";
  position: absolute;
  inset: 5px;
  border: 1px dashed rgba(212, 175, 55, 0.26);
  pointer-events: none;
}

.page-about .ab-data-num {
  font-family: var(--font-mono);
  font-size: clamp(1.9rem, 5vw, 3rem);
  line-height: 1;
  color: var(--color-gold);
  margin: 0 0 0.5rem;
  font-weight: 700;
  display: flex;
  align-items: baseline;
  gap: 0.15em;
}

.page-about .ab-data-unit {
  font-size: 0.6em;
  color: var(--color-light-gold);
}

.page-about .ab-data-label {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: rgba(245, 241, 232, 0.84);
  margin: 0;
}

.page-about .ab-data-note {
  margin-top: 1.5rem;
  font-size: 0.92rem;
  line-height: 1.7;
  color: rgba(245, 241, 232, 0.78);
  border-left: 3px solid var(--color-gold);
  padding-left: 0.8rem;
  max-width: 44rem;
}

.page-about .ab-principle {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: var(--space-xl) var(--space-lg);
  display: grid;
  gap: var(--space-xl);
  grid-template-columns: minmax(0, 1fr);
}

.page-about .ab-principle-copy p {
  line-height: 1.75;
  margin-bottom: 1rem;
}

.page-about .ab-principle-lead {
  font-size: 1.06rem;
}

.page-about .ab-figure--principle img {
  border: 1px solid var(--color-gray-green);
  box-shadow: 12px 12px 0 rgba(11, 61, 46, 0.12);
  transform: rotate(0.4deg);
}

.page-about .ab-context {
  background: var(--color-cream);
  border-top: 3px solid var(--color-deep-green);
  padding: var(--space-xl) var(--space-lg);
}

.page-about .ab-context-inner {
  max-width: var(--content-max);
  margin: 0 auto;
}

.page-about .ab-context-head {
  margin-bottom: var(--space-lg);
}

.page-about .ab-context-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: minmax(0, 1fr);
}

.page-about .ab-context-card {
  position: relative;
  display: block;
  background: var(--color-white);
  border: 1px solid var(--color-gray-green);
  padding: 1.25rem 1.25rem 2.2rem;
  text-decoration: none;
  color: var(--color-ink);
  box-shadow: 4px 4px 0 rgba(11, 61, 46, 0.06);
  transition:
    background var(--ease),
    border-color var(--ease),
    transform var(--ease),
    box-shadow var(--ease);
}

.page-about .ab-context-card:hover {
  background: var(--color-light-gold);
  border-color: var(--color-gold);
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 rgba(11, 61, 46, 0.12);
}

.page-about .ab-context-id {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--color-copper);
  text-transform: uppercase;
  display: block;
  margin-bottom: 0.6rem;
}

.page-about .ab-context-title {
  display: block;
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--color-deep-green);
  margin-bottom: 0.4rem;
}

.page-about .ab-context-desc {
  font-size: 0.92rem;
  line-height: 1.6;
  display: block;
}

.page-about .ab-context-arrow {
  position: absolute;
  right: 1rem;
  bottom: 0.9rem;
  font-size: 1.1rem;
  color: var(--color-gold);
  font-weight: 700;
}

@media (min-width: 560px) {
  .page-about .ab-data-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .ab-hero-inner {
    grid-template-columns: minmax(0, 1fr) 320px;
  }

  .page-about .ab-origin {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: center;
  }

  .page-about .ab-timeline {
    --ab-tl-pad: 72px;
    --ab-tl-line-center: 34px;
    --ab-tl-line-w: 16px;
  }

  .page-about .ab-tl-item {
    padding: 1.25rem 1.4rem 1.25rem 1.5rem;
  }

  .page-about .ab-data-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .ab-principle {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: center;
  }

  .page-about .ab-context-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}