.page-about {
  --about-font-index: var(--font-mono);
  --about-line: rgba(192, 201, 207, 0.22);
  --about-blue-glow: rgba(0, 168, 255, 0.35);
  background-image:
    linear-gradient(rgba(154, 163, 173, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(154, 163, 173, 0.05) 1px, transparent 1px);
  background-size: 36px 36px;
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-headline);
  letter-spacing: 0.01em;
}

.page-about h1 {
  margin: 1rem 0;
  font-size: clamp(2.25rem, 5vw, 4rem);
  line-height: 1.05;
  text-transform: uppercase;
}

.page-about h2 {
  font-size: clamp(1.75rem, 3.6vw, 2.75rem);
  line-height: 1.15;
}

.page-about h3 {
  font-size: 1.25rem;
  line-height: 1.35;
}

.page-about .breadcrumbs {
  margin: 0 0 2rem;
  font-family: var(--about-font-index);
  font-size: 0.8rem;
}

.page-about .breadcrumbs a {
  color: var(--color-electric-blue);
  text-decoration: none;
}

.page-about .breadcrumbs a:hover {
  color: var(--color-neon-green);
}

.page-about .section {
  padding: 2.5rem 0;
}

.page-about .section--narrow {
  max-width: 780px;
}

.page-about .section-head {
  margin-bottom: 1.75rem;
}

.page-about .about-hero {
  padding-top: 2rem;
}

.page-about .about-hero__overline {
  font-family: var(--about-font-index);
  font-size: 0.8rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-neon-green);
  margin-bottom: 0.5rem;
}

.page-about .about-hero__lead {
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--color-muted);
  max-width: 680px;
  margin: 1.25rem 0 1.5rem;
}

.page-about .about-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  font-family: var(--about-font-index);
  font-size: 0.78rem;
  color: var(--color-silver);
  border-top: 1px solid var(--about-line);
  padding-top: 1rem;
}

.page-about .about-origin .section-head__overline,
.page-about .about-milestone .section-head__overline,
.page-about .about-team .section-head__overline,
.page-about .about-principles .section-head__overline {
  font-family: var(--about-font-index);
  font-size: 0.85rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-electric-blue);
  display: block;
  margin-bottom: 0.5rem;
}

.page-about .about-origin__body {
  font-size: 1rem;
  line-height: 1.95;
  color: var(--color-text);
}

.page-about .text-link {
  color: var(--color-electric-blue);
  text-underline-offset: 4px;
}

.page-about .about-milestone__evo {
  margin: 0 0 2.75rem;
  aspect-ratio: 16 / 9;
}

.page-about .milestone-layout {
  display: grid;
  gap: 2.25rem;
}

.page-about .timeline--brand {
  margin: 0;
  padding: 0;
  list-style: none;
  position: relative;
}

.page-about .timeline--brand::before {
  content: "";
  position: absolute;
  left: 0.6rem;
  top: 0.25rem;
  bottom: 0.25rem;
  width: 2px;
  background: linear-gradient(to bottom, var(--color-electric-blue), var(--color-neon-green));
  opacity: 0.4;
  border-radius: 999px;
}

.page-about .timeline--brand .timeline__item {
  position: relative;
  padding: 0 0 2rem 2.4rem;
}

.page-about .timeline--brand .timeline__item:last-child {
  padding-bottom: 0;
}

.page-about .timeline--brand .timeline__item::before {
  content: "";
  position: absolute;
  left: 0.1rem;
  top: 0.3rem;
  width: 0.9rem;
  height: 0.9rem;
  border-radius: 50%;
  background: var(--color-neon-green);
  box-shadow: 0 0 0 4px rgba(57, 255, 20, 0.15);
}

.page-about .timeline--brand .timeline__date {
  display: inline-block;
  font-family: var(--about-font-index);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-electric-blue);
  margin-bottom: 0.35rem;
  background: rgba(0, 168, 255, 0.1);
  padding: 0.15rem 0.5rem;
  border-left: 2px solid var(--color-electric-blue);
}

.page-about .timeline--brand .timeline__title {
  margin: 0 0 0.5rem;
}

.page-about .timeline--brand .timeline__text {
  margin: 0;
  color: var(--color-muted);
  line-height: 1.8;
  max-width: 560px;
}

.page-about .milestone-aside {
  background: var(--color-card);
  border: 1px solid var(--about-line);
  padding: 1rem;
}

.page-about .milestone-aside__cover {
  margin: 0 0 1rem;
  aspect-ratio: 3 / 4;
}

.page-about .milestone-aside__caption {
  color: var(--color-muted);
  font-size: 0.875rem;
  line-height: 1.7;
  margin-bottom: 1rem;
}

.page-about .btn--ghost {
  width: 100%;
  justify-content: center;
}

.page-about .about-version-tabs {
  margin-top: 3rem;
  border: 1px solid var(--about-line);
  background: var(--color-card);
}

.page-about .about-version-tabs .tabs__list {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--about-line);
  padding: 0 0.75rem;
}

.page-about .about-version-tabs .tabs__tab {
  flex: 1 1 0;
  background: transparent;
  border: 0;
  border-bottom: 2px solid transparent;
  color: var(--color-muted);
  font-family: var(--font-body);
  font-size: 0.9rem;
  padding: 0.85rem 0.5rem;
  cursor: pointer;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .about-version-tabs .tabs__tab[aria-selected="true"] {
  color: var(--color-electric-blue);
  border-bottom-color: var(--color-electric-blue);
}

.page-about .about-version-tabs .tabs__panel {
  padding: 1.5rem;
  color: var(--color-muted);
  line-height: 1.8;
}

.page-about .about-version-tabs .tabs__panel h3 {
  color: var(--color-text);
  margin-top: 0;
}

.page-about .team-layout {
  display: grid;
  gap: 2rem;
}

.page-about .team-copy {
  color: var(--color-text);
  line-height: 1.9;
}

.page-about .team-visual {
  margin: 0;
  aspect-ratio: 3 / 2;
}

.page-about .principles-grid {
  display: grid;
  gap: 1.5rem;
}

.page-about .about-principles__card {
  padding: 1.5rem;
}

.page-about .about-principles__card .card__title {
  margin-top: 0;
}

.page-about .about-docnav {
  border-top: 1px solid var(--about-line);
  margin-top: 2rem;
}

.page-about .about-docnav .section-head__title {
  font-size: 1rem;
  font-family: var(--about-font-index);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-muted);
}

.page-about .about-docnav__list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem 1rem;
  list-style: none;
  padding: 0;
  margin: 1.5rem 0 0;
}

.page-about .about-docnav__list a {
  color: var(--color-electric-blue);
  text-decoration: none;
  font-family: var(--about-font-index);
  font-size: 0.875rem;
  padding: 0.4rem 0;
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-docnav__list a:hover {
  color: var(--color-neon-green);
}

.page-about .media-frame {
  overflow: hidden;
}

.page-about .media-frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

@media (min-width: 700px) {
  .page-about .principles-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 800px) {
  .page-about .section {
    padding: 4rem 0;
  }

  .page-about .about-hero {
    padding-top: 3.5rem;
  }

  .page-about .team-layout {
    grid-template-columns: minmax(0, 1.05fr) minmax(300px, 0.95fr);
    align-items: center;
  }

  .page-about .about-docnav__list {
    grid-template-columns: repeat(5, 1fr);
  }
}

@media (min-width: 960px) {
  .page-about .milestone-layout {
    grid-template-columns: minmax(0, 1fr) 320px;
    align-items: start;
  }

  .page-about .about-version-tabs {
    margin-top: 4rem;
  }

  .page-about .about-version-tabs .tabs__panel {
    padding: 2rem;
    min-height: 120px;
  }
}