.page-about {
  --about-track-left: clamp(0.5rem, 1.5vw, 1.25rem);
  --about-chapter-pad: clamp(2rem, 5vw, 4rem);
}

.page-about .about-hero {
  padding: clamp(3rem, 8vw, 6rem) 0 clamp(2rem, 5vw, 4rem);
  border-bottom: 1px solid var(--line);
  margin-bottom: var(--section);
}

.page-about .about-hero .eyebrow {
  color: var(--pulse);
  font-family: var(--font-mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: 0.8rem;
  margin-bottom: 1rem;
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2rem, 6vw, 4.2rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--paper);
  max-width: 18ch;
  margin-bottom: 1.5rem;
}

.page-about .about-hero .lede {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  line-height: 1.7;
  color: var(--mist);
  max-width: 68ch;
}

.page-about .chapter-nav {
  display: none;
}

.page-about .about-chapter {
  position: relative;
  padding-left: var(--about-chapter-pad);
  padding-bottom: var(--section);
  border-bottom: 1px solid var(--line);
  margin-bottom: var(--section);
}

.page-about .about-chapter:last-of-type {
  border-bottom: none;
  margin-bottom: 0;
}

.page-about .about-chapter::before {
  content: "";
  position: absolute;
  left: var(--about-track-left);
  top: 0;
  bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, transparent, var(--line) 10%, var(--line) 90%, transparent);
}

.page-about .about-chapter::after {
  content: attr(data-chapter);
  position: absolute;
  left: var(--about-chapter-pad);
  top: -0.2em;
  font-family: var(--font-mono);
  font-size: clamp(5rem, 12vw, 10rem);
  font-weight: 700;
  color: var(--paper);
  opacity: 0.06;
  pointer-events: none;
  line-height: 1;
  z-index: 0;
}

.page-about .about-chapter .chapter__head {
  position: relative;
  z-index: 1;
  margin-bottom: 2rem;
}

.page-about .about-chapter .chapter__label {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.12em;
  color: var(--pulse);
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.page-about .about-chapter .chapter__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.6rem, 4vw, 2.6rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--paper);
  max-width: 22ch;
}

.page-about .about-chapter .chapter__body {
  position: relative;
  z-index: 1;
  max-width: 68ch;
  color: var(--mist);
  line-height: 1.8;
  font-size: 1.05rem;
}

.page-about .about-chapter .chapter__body p {
  margin-bottom: 1.25rem;
}

.page-about .about-chapter .chapter__media {
  margin-top: 2.5rem;
  position: relative;
  z-index: 1;
}

.page-about .about-chapter .chapter__media img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  object-fit: cover;
}

.page-about .timeline-history {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
  margin-top: 2rem;
}

.page-about .timeline-history__item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1.5rem;
  align-items: start;
  padding-left: 1.5rem;
  border-left: 2px solid var(--line);
  position: relative;
}

.page-about .timeline-history__item::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 0.5rem;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--pulse);
  box-shadow: 0 0 12px var(--pulse);
}

.page-about .timeline-history__year {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  color: var(--pulse);
  font-weight: 700;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.page-about .timeline-history__content h3 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--paper);
  margin: 0 0 0.5rem;
}

.page-about .timeline-history__content p {
  margin: 0;
  color: var(--fog);
  font-size: 1rem;
  line-height: 1.7;
}

.page-about .team-bars {
  margin-top: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.page-about .team-bar {
  display: grid;
  grid-template-columns: 100px 1fr 60px;
  align-items: center;
  gap: 1rem;
}

.page-about .team-bar__label {
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--mist);
  font-weight: 500;
}

.page-about .team-bar__value {
  height: 8px;
  background: var(--ink-600);
  position: relative;
  border-radius: 2px;
  overflow: hidden;
}

.page-about .team-bar__value::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: var(--bar-width, 0%);
  background: var(--pulse);
  border-radius: 2px;
}

.page-about .team-bar__num {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--pulse);
  text-align: right;
  font-weight: 600;
}

.page-about .team-bar:nth-child(1) .team-bar__value { --bar-width: 43%; }
.page-about .team-bar:nth-child(2) .team-bar__value { --bar-width: 25%; }
.page-about .team-bar:nth-child(3) .team-bar__value { --bar-width: 18%; }
.page-about .team-bar:nth-child(4) .team-bar__value { --bar-width: 14%; }

.page-about .reason-list {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0 0;
  display: grid;
  gap: 1.5rem;
}

.page-about .reason-list li {
  padding-left: 1.5rem;
  border-left: 2px solid var(--pulse);
  color: var(--mist);
  line-height: 1.7;
}

.page-about .reason-list strong {
  color: var(--paper);
  font-weight: 700;
}

.page-about .outro-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2rem;
}

.page-about .segmented {
  margin-top: 1rem;
}

.page-about .segmented__tab {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.04em;
}

.page-about .segmented__panel p {
  margin: 1rem 0 0;
  color: var(--mist);
  line-height: 1.8;
}

@media (min-width: 900px) {
  .page-about .shell {
    display: grid;
    grid-template-columns: 1fr 200px;
    gap: 2rem;
    align-items: start;
  }

  .page-about .about-hero,
  .page-about .about-chapter {
    grid-column: 1;
  }

  .page-about .chapter-nav {
    display: block;
    grid-column: 2;
    position: sticky;
    top: 10rem;
    align-self: start;
  }

  .page-about .chapter-nav a {
    display: block;
    padding: 0.5rem 0;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--fog);
    text-decoration: none;
    border-left: 2px solid transparent;
    padding-left: 1rem;
    transition: color 0.2s, border-color 0.2s;
  }

  .page-about .chapter-nav a:hover,
  .page-about .chapter-nav a[aria-current="true"] {
    color: var(--pulse);
    border-left-color: var(--pulse);
  }
}

@media (max-width: 600px) {
  .page-about .about-chapter {
    padding-left: 1.5rem;
  }

  .page-about .about-chapter::before {
    left: 0.25rem;
  }

  .page-about .about-chapter::after {
    font-size: 4rem;
    left: 1.5rem;
  }

  .page-about .timeline-history__item {
    grid-template-columns: 1fr;
    gap: 0.5rem;
  }

  .page-about .team-bar {
    grid-template-columns: 80px 1fr 50px;
    gap: 0.75rem;
  }
}
</main>