.page-about {
  --page-accent: var(--royal);
  --page-shadow: 6px 6px 0 rgba(10, 10, 10, 0.08);
  --page-border: 2px solid var(--ink);
  --page-timeline-pad: 2.25rem;
  padding-bottom: 3rem;
}

.page-about img {
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .breadcrumb {
  padding: 1.25rem 0 0.5rem;
}

.page-about .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  color: var(--gray-800);
}

.page-about .breadcrumb__link {
  color: var(--royal);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease, opacity 0.2s ease;
}

.page-about .breadcrumb__link:hover,
.page-about .breadcrumb__link:focus {
  border-bottom-color: var(--royal);
}

.page-about .breadcrumb__sep {
  margin: 0 0.5rem;
  opacity: 0.65;
}

.page-about .breadcrumb__item[aria-current="page"] {
  color: var(--ink);
}

.page-about__hero {
  padding-top: 1rem;
  padding-bottom: 2.5rem;
}

.page-about__hero-grid {
  display: grid;
  gap: 2rem 3rem;
  align-items: center;
}

.page-about__hero-text .section-kicker {
  margin-bottom: 0.75rem;
}

.page-about__hero-text h1 {
  font-family: var(--font-sans);
  font-size: clamp(1.75rem, 5vw, 3rem);
  font-weight: 700;
  line-height: 1.2;
  margin: 0 0 1.25rem;
  color: var(--ink);
}

.page-about__hero-text .lead {
  max-width: 40rem;
  margin: 0;
}

.page-about__version-badge {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 1rem;
  background: var(--royal);
  color: var(--white);
  padding: 1.25rem 1.5rem;
  border: var(--page-border);
  box-shadow: var(--page-shadow);
  position: relative;
  overflow: hidden;
}

.page-about__version-badge::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 0 32px 32px 0;
  border-color: transparent var(--gold) transparent transparent;
}

.page-about__version-num {
  font-family: var(--font-mono);
  font-size: 2.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1;
  color: var(--gold);
}

.page-about__version-cap {
  font-size: 0.8125rem;
  line-height: 1.5;
  color: var(--white);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.page-about__section {
  padding-top: 2rem;
}

.page-about__section .section-header {
  margin-bottom: 1.25rem;
}

.page-about__section .divider {
  margin-bottom: 2rem;
}

.page-about__brand-grid,
.page-about__timeline-grid,
.page-about__compliance-grid {
  align-items: start;
}

.page-about__brand-aside {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 100%;
  gap: 1.25rem;
  padding-bottom: 1.5rem;
}

.page-about__brand-glyph {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  font-family: var(--font-sans);
  font-size: clamp(4rem, 13vw, 7.5rem);
  font-weight: 700;
  line-height: 0.9;
  letter-spacing: -0.06em;
}

.page-about__brand-glyph span:first-child {
  color: var(--ink);
}

.page-about__brand-glyph span:last-child {
  color: transparent;
  -webkit-text-stroke: 2px var(--royal);
}

.page-about__brand-caption {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--gray-800);
  margin: 0;
  padding-left: 0.25rem;
  border-left: 3px solid var(--gold);
}

.page-about__prose p {
  color: var(--gray-800);
}

.page-about__media {
  margin-top: 1.75rem;
  overflow: hidden;
  border: var(--page-border);
  box-shadow: var(--page-shadow);
  background: var(--white);
}

.page-about__media img {
  display: block;
  width: 100%;
}

.page-about__media--square {
  aspect-ratio: 1;
}

.page-about__media--square img {
  height: 100%;
  object-fit: cover;
}

.page-about__timeline {
  position: relative;
  padding-left: 1.5rem;
  border-left: 2px solid var(--gray-200);
}

.page-about__tl-item {
  position: relative;
  padding: 0 0 2rem 0.5rem;
}

.page-about__tl-item:last-child {
  padding-bottom: 0;
}

.page-about__tl-dot {
  position: absolute;
  left: -1.75rem;
  top: 0.375rem;
  width: 0.75rem;
  height: 0.75rem;
  background: var(--white);
  border: 2px solid var(--ink);
  border-radius: 50%;
  box-sizing: border-box;
}

.page-about__tl-item--current .page-about__tl-dot {
  background: var(--gold);
  border-color: var(--royal);
  box-shadow: 0 0 0 4px rgba(255, 215, 0, 0.25);
}

.page-about__tl-version {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 700;
  font-style: italic;
  color: var(--royal);
  line-height: 1;
  margin-bottom: 0.5rem;
}

.page-about__tl-item--current .page-about__tl-version {
  color: var(--gold);
  background: var(--royal);
  padding: 0.1rem 0.5rem;
  margin-left: -0.5rem;
}

.page-about__tl-title {
  font-family: var(--font-sans);
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--ink);
  margin: 0 0 0.5rem;
}

.page-about__tl-desc {
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--gray-800);
  margin: 0;
}

.page-about__timeline-more {
  padding-left: 2.25rem;
  margin-top: 0.5rem;
  font-family: var(--font-mono);
}

.page-about__timeline-more summary {
  list-style: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--royal);
  padding: 0.5rem 0;
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-about__timeline-more summary::-webkit-details-marker {
  display: none;
}

.page-about__timeline-more summary::before {
  content: "▸";
  display: inline-block;
  transition: transform 0.2s ease;
}

.page-about__timeline-more[open] summary::before {
  transform: rotate(90deg);
}

.page-about__timeline-more[open] summary {
  border-bottom-color: var(--gray-200);
  margin-bottom: 1rem;
}

.page-about__tl-item--nested {
  margin-top: 0;
}

.page-about__tl-item--nested .page-about__tl-content {
  background: var(--gray-800);
  border: 2px solid var(--ink);
  padding: 1rem 1rem 1.25rem;
  color: var(--white);
  box-shadow: 5px 5px 0 rgba(10, 10, 10, 0.12);
}

.page-about__tl-item--nested .page-about__tl-version {
  color: var(--gold);
}

.page-about__tl-item--nested .page-about__tl-title {
  color: var(--white);
}

.page-about__tl-item--nested .page-about__tl-desc {
  color: rgba(255, 255, 255, 0.85);
}

.page-about__version-note {
  background: var(--white);
  border: 2px solid var(--ink);
  box-shadow: var(--page-shadow);
  padding: clamp(1.25rem, 3vw, 2rem);
  margin-bottom: 1.75rem;
}

.page-about__version-note h3 {
  font-family: var(--font-sans);
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--ink);
  margin: 0.5rem 0 0.75rem;
}

.page-about__version-note-text {
  margin: 0 0 1.5rem;
  color: var(--gray-800);
  line-height: 1.7;
}

.page-about__icp-panel {
  background: var(--white);
  border: 3px solid var(--royal);
  padding: clamp(1.5rem, 4vw, 2.25rem);
  box-shadow: 8px 8px 0 rgba(0, 51, 102, 0.12);
  position: relative;
}

.page-about__icp-tag {
  background: var(--gold);
  border-color: var(--ink);
  font-family: var(--font-mono);
  font-weight: 600;
}

.page-about__icp-number {
  font-family: var(--font-mono);
  font-size: clamp(1.25rem, 3vw, 2rem);
  font-weight: 700;
  color: var(--royal);
  margin: 0.75rem 0 0.25rem;
}

.page-about__icp-note {
  color: var(--gray-800);
  margin: 0;
  font-size: 0.95rem;
}

.page-about__compliance-contact {
  margin-top: 1rem;
  background: var(--soft-blue);
  border: 2px solid var(--royal);
  padding: 1.25rem 1.5rem;
}

.page-about__compliance-contact-item {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  margin: 0;
  padding: 0.35rem 0;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--ink);
}

.page-about__compliance-contact-item span {
  color: var(--royal);
  font-weight: 700;
  min-width: 4.5rem;
}

.page-about__tablist {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.page-about__tab {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--gray-800);
  background: transparent;
  border: 0;
  border-bottom: 2px solid var(--gray-200);
  border-radius: 0;
  padding: 0.75rem 1.25rem;
  cursor: pointer;
  transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
}

.page-about__tab:hover,
.page-about__tab:focus {
  color: var(--royal);
  border-bottom-color: var(--royal);
}

.page-about__tab[aria-selected="true"] {
  color: var(--royal);
  border-bottom-color: var(--royal);
  background: var(--soft-blue);
}

.page-about__tabpanel {
  background: var(--white);
  border: 2px solid var(--ink);
  box-shadow: var(--page-shadow);
  padding: clamp(1.25rem, 3vw, 2rem);
}

.page-about__tabpanel-text {
  margin: 0;
  font-size: 1.125rem;
  line-height: 1.7;
  color: var(--gray-800);
}

.page-about__facts {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  border-top: 4px solid var(--ink);
  border-bottom: 4px solid var(--ink);
  padding: 2rem 0;
  margin-top: 2rem;
}

.page-about__fact {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding: 0.5rem 0.75rem;
  border-left: 4px solid var(--royal);
}

.page-about__fact:nth-child(even) {
  border-left-color: var(--gold);
}

.page-about__fact-num {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  line-height: 1;
  color: var(--ink);
}

.page-about__fact-label {
  font-size: 0.8125rem;
  color: var(--gray-800);
}

.page-about__cta {
  padding-top: 2.5rem;
}

.page-about__cta-box {
  background: var(--ink);
  color: var(--white);
  padding: clamp(1.5rem, 4vw, 3rem);
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  border: 2px solid var(--royal);
  box-shadow: 8px 8px 0 rgba(0, 51, 102, 0.15);
}

.page-about__cta-box .section-kicker {
  color: var(--gold);
  margin-bottom: 0.5rem;
}

.page-about__cta-box h2 {
  color: var(--white);
  margin: 0;
  font-size: clamp(1.5rem, 3vw, 2rem);
}

.page-about__cta-box p {
  color: rgba(255, 255, 255, 0.85);
  margin: 0.5rem 0 0;
  line-height: 1.7;
}

.page-about__cta-links {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-top: 0.5rem;
}

.page-about__cta-links .site-btn--light {
  background: var(--gold);
  color: var(--ink);
  border-color: var(--gold);
}

@media (min-width: 768px) {
  .page-about__hero {
    padding-top: 2rem;
  }

  .page-about__hero-grid {
    grid-template-columns: 8fr 4fr;
  }

  .page-about__version-badge {
    flex-direction: column;
    align-items: flex-start;
  }

  .page-about__section {
    padding-top: 3rem;
  }

  .page-about__brand-glyph {
    font-size: clamp(5rem, 14vw, 8rem);
  }

  .page-about__timeline {
    padding-left: 2.5rem;
  }

  .page-about__tl-dot {
    left: -2.25rem;
  }

  .page-about__facts {
    grid-template-columns: repeat(4, 1fr);
    margin-top: 3rem;
  }

  .page-about__cta-box {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

@media (min-width: 1024px) {
  .page-about__hero-grid {
    gap: 4rem;
  }

  .page-about__section {
    padding-top: 4.5rem;
  }

  .page-about__version-badge {
    padding: 2rem 2.25rem;
  }

  .page-about__version-num {
    font-size: 3.5rem;
  }

  .page-about__brand-glyph {
    font-size: 9rem;
  }

  .page-about__timeline {
    border-left-width: 3px;
  }

  .page-about__facts {
    padding: 2.5rem 1rem;
  }
}