.page-about {
  --about-accent: var(--orange-red);
  --about-chart-line: rgba(139, 155, 180, 0.55);
  background-color: var(--cream);
  background-image:
    linear-gradient(rgba(139, 155, 180, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(139, 155, 180, 0.055) 1px, transparent 1px);
  background-size: 26px 26px;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 2rem 1rem 4rem;
  font-family: var(--font-body);
  color: var(--deep-brown);
}

.page-about .about-hero {
  display: grid;
  gap: 1.75rem;
  padding: 0.5rem 0 2.25rem;
  border-bottom: 2px solid var(--deep-brown);
  margin-bottom: 1.5rem;
}

.page-about .about-hero-copy .index-label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  color: var(--brown-muted);
  text-transform: uppercase;
  border: 1px solid var(--border-brown);
  padding: 0.3rem 0.6rem;
  background: var(--cream-light);
}

.page-about .about-hero-copy h1 {
  font-family: var(--font-head);
  font-size: clamp(1.6rem, 4.2vw, 2.6rem);
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--deep-brown);
  margin: 1rem 0 0.9rem;
}

.page-about .about-hero-lead {
  font-size: 1.05rem;
  line-height: 1.75;
  color: var(--brown-muted);
  max-width: 42rem;
  margin: 0;
}

.page-about .about-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.75rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--deep-brown);
  border-top: 1px solid var(--border-brown);
  padding-top: 1rem;
  margin-top: 1.5rem;
}

.page-about .about-hero-meta span {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.page-about .about-hero-meta span::before {
  content: '';
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 50%;
  background: var(--about-accent);
}

.page-about .about-hero-figure {
  margin: 0;
  border: 2px solid var(--deep-brown);
  background: var(--cream-light);
  box-shadow: 8px 8px 0 rgba(43, 30, 22, 0.1);
}

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

.page-about .about-hero-figure figcaption {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--brown-muted);
  padding: 0.5rem 0.75rem;
  border-top: 1px solid var(--border-brown);
  text-align: center;
}

.page-about .about-toc {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 1.25rem 0;
  margin-bottom: 2.5rem;
  border-bottom: 1px solid var(--border-brown);
}

.page-about .about-toc a {
  text-decoration: none;
  color: var(--deep-brown);
  font-weight: 600;
  font-size: 0.9rem;
  padding: 0.5rem 0.9rem;
  border: 1.5px solid var(--deep-brown);
  background: var(--cream-light);
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  transition: all 0.2s ease;
}

.page-about .about-toc a:hover,
.page-about .about-toc a[aria-current="true"] {
  background: var(--about-accent);
  color: var(--cream-light);
  box-shadow: 4px 4px 0 var(--deep-brown);
  transform: translate(-2px, -2px);
}

.page-about .toc-num {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  opacity: 0.85;
}

.page-about .about-milestones,
.page-about .about-scale,
.page-about .about-features,
.page-about .about-philosophy {
  margin-bottom: 3.5rem;
  scroll-margin-top: 2rem;
}

.page-about .about-milestones .section-head,
.page-about .about-scale .section-head,
.page-about .about-features .section-head,
.page-about .about-philosophy .section-head {
  margin-bottom: 1.75rem;
}

.page-about .section-head .section-title {
  font-family: var(--font-head);
  font-size: 1.65rem;
  line-height: 1.2;
  margin: 0.4rem 0 0.6rem;
  color: var(--deep-brown);
}

.page-about .timeline-wrap {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.page-about .timeline-index {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1rem;
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--brown-muted);
  padding: 0.4rem 0 0.2rem;
}

.page-about .timeline-index span {
  border-left: 3px solid var(--about-accent);
  padding-left: 0.5rem;
}

.page-about .timeline-track {
  position: relative;
  padding-left: 2.6rem;
}

.page-about .timeline-track::before {
  content: '';
  position: absolute;
  left: 0.6rem;
  top: 0.35rem;
  bottom: 0.35rem;
  width: 2px;
  background: var(--border-brown);
}

.page-about .timeline-item {
  position: relative;
  padding-bottom: 1.75rem;
}

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

.page-about .timeline-dot {
  position: absolute;
  left: -2.4rem;
  top: 0.45rem;
  width: 0.85rem;
  height: 0.85rem;
  border-radius: 50%;
  background: var(--about-accent);
  border: 2px solid var(--cream);
  box-shadow: 0 0 0 2px var(--about-accent);
  transition: transform 0.25s ease, background 0.25s ease;
}

.page-about .timeline-item:hover .timeline-dot {
  transform: scale(1.35);
  background: var(--chart-red);
  box-shadow: 0 0 0 2px var(--chart-red);
}

.page-about .timeline-card {
  background: var(--cream-light);
  border: 1.5px solid var(--deep-brown);
  padding: 0.95rem 1.15rem 1rem;
  transition: box-shadow 0.25s ease, transform 0.25s ease;
}

.page-about .timeline-item:hover .timeline-card {
  box-shadow: 6px 6px 0 rgba(232, 93, 46, 0.28);
  transform: translate(-2px, -2px);
}

.page-about .timeline-card h3 {
  font-family: var(--font-head);
  font-size: 1.08rem;
  margin: 0.2rem 0 0.45rem;
  color: var(--deep-brown);
}

.page-about .timeline-card p {
  font-size: 0.94rem;
  line-height: 1.65;
  color: var(--brown-muted);
  margin: 0;
}

.page-about .timeline-year {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--about-accent);
  letter-spacing: 0.05em;
}

.page-about .scale-panel {
  background: var(--cream-light);
  border: 1.5px solid var(--deep-brown);
  padding: 1.25rem;
}

.page-about .scale-grid {
  display: grid;
  gap: 1.75rem;
}

.page-about .scale-chart-figure {
  margin: 0;
  border: 1px solid var(--border-brown);
  background: var(--cream);
  padding: 0.65rem;
}

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

.page-about .scale-chart-figure figcaption {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--brown-muted);
  text-align: center;
  padding-top: 0.45rem;
}

.page-about .data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.page-about .data-table caption {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--brown-muted);
  text-align: left;
  margin-bottom: 0.85rem;
}

.page-about .data-table th,
.page-about .data-table td {
  padding: 0.78rem 0.7rem;
  border: 1px solid var(--about-chart-line);
  text-align: left;
  vertical-align: top;
}

.page-about .data-table thead th {
  background: var(--deep-brown);
  color: var(--cream-light);
  font-family: var(--font-head);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.page-about .data-table tbody th {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--deep-brown);
  background: rgba(196, 181, 160, 0.22);
  width: 45%;
}

.page-about .data-table tbody td {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--deep-brown);
}

.page-about .data-table tbody tr:hover th,
.page-about .data-table tbody tr:hover td {
  background: rgba(232, 93, 46, 0.09);
}

.page-about .features-intro {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--brown-muted);
  max-width: 42rem;
  margin: 0 0 1.75rem;
}

.page-about .features-grid {
  display: grid;
  gap: 1.75rem;
}

.page-about .feature-item {
  display: grid;
  grid-template-columns: 2.75rem 1fr;
  gap: 0.9rem;
  padding: 1.15rem 0;
  border-bottom: 1px solid var(--border-brown);
}

.page-about .feature-item:first-child {
  border-top: 1px solid var(--border-brown);
}

.page-about .feature-num {
  width: 2.4rem;
  height: 2.4rem;
  border: 2px solid var(--deep-brown);
  background: var(--cream-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--about-accent);
}

.page-about .feature-item h3 {
  font-family: var(--font-head);
  font-size: 1.1rem;
  margin: 0 0 0.35rem;
  color: var(--deep-brown);
}

.page-about .feature-item p {
  font-size: 0.94rem;
  line-height: 1.65;
  color: var(--brown-muted);
  margin: 0;
}

.page-about .features-figure {
  margin: 0;
  border: 2px solid var(--deep-brown);
  background: var(--cream-light);
  padding: 0.7rem;
  box-shadow: 8px 8px 0 rgba(43, 30, 22, 0.1);
  align-self: center;
}

.page-about .features-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

.page-about .features-figure figcaption {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--brown-muted);
  text-align: center;
  padding-top: 0.45rem;
}

.page-about .philosophy-grid {
  display: grid;
  gap: 1.25rem;
}

.page-about .philosophy-card {
  border: 2px solid var(--deep-brown);
  background: var(--cream-light);
  padding: 1.4rem 1.2rem 1.25rem;
  position: relative;
  transition: box-shadow 0.25s ease, transform 0.25s ease;
}

.page-about .philosophy-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--about-accent);
}

.page-about .philosophy-card:hover {
  box-shadow: 6px 6px 0 var(--about-accent);
  transform: translate(-3px, -3px);
}

.page-about .philosophy-card h3 {
  font-family: var(--font-head);
  font-size: 1.12rem;
  margin: 0.4rem 0 0.5rem;
  color: var(--deep-brown);
}

.page-about .philosophy-card p {
  font-size: 0.94rem;
  line-height: 1.65;
  color: var(--brown-muted);
  margin: 0;
}

.page-about .philosophy-note {
  margin-top: 1.75rem;
  padding: 1rem 1.25rem;
  border-left: 4px solid var(--about-accent);
  background: rgba(232, 93, 46, 0.07);
  font-size: 0.96rem;
  line-height: 1.7;
  color: var(--deep-brown);
}

.page-about .about-related {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 3rem;
  padding-top: 1.75rem;
  border-top: 2px solid var(--deep-brown);
}

.page-about .about-related-link {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.55rem 0.95rem;
  border: 1.5px solid var(--deep-brown);
  background: var(--cream-light);
  color: var(--deep-brown);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  transition: background 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
}

.page-about .about-related-link:hover {
  background: var(--deep-brown);
  color: var(--cream-light);
  box-shadow: 4px 4px 0 var(--about-accent);
  transform: translate(-2px, -2px);
}

.page-about .about-related-link span {
  font-family: var(--font-mono);
}

@media (min-width: 640px) {
  .page-about {
    padding-left: 1.5rem;
    padding-right: 1.5rem;
  }

  .page-about .about-hero {
    grid-template-columns: 1.05fr 1fr;
    align-items: center;
    gap: 2.5rem;
  }

  .page-about .about-hero-copy h1 {
    font-size: 2.1rem;
  }

  .page-about .timeline-index {
    font-size: 1.25rem;
    gap: 0.5rem 1.5rem;
  }

  .page-about .philosophy-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 992px) {
  .page-about {
    padding: 3rem 2rem 5rem;
  }

  .page-about .about-toc {
    margin-bottom: 3rem;
  }

  .page-about .timeline-wrap {
    grid-template-columns: 190px 1fr;
    gap: 2.25rem;
  }

  .page-about .timeline-index {
    flex-direction: column;
    gap: 0;
    border-right: 2px solid var(--deep-brown);
    padding-right: 1.4rem;
    align-self: start;
    position: sticky;
    top: 2rem;
  }

  .page-about .timeline-index span {
    border-left: 0;
    border-bottom: 1px solid var(--border-brown);
    padding: 0.65rem 0;
    font-size: 1.05rem;
  }

  .page-about .timeline-index span::after {
    content: '→';
    color: var(--about-accent);
    margin-left: 0.6rem;
    opacity: 0;
    transition: opacity 0.2s ease;
  }

  .page-about .timeline-index span:hover::after,
  .page-about .timeline-index span:focus-within::after {
    opacity: 1;
  }

  .page-about .timeline-track {
    padding-left: 2.8rem;
  }

  .page-about .timeline-dot {
    left: -2.6rem;
  }

  .page-about .scale-panel {
    padding: 1.75rem;
  }

  .page-about .scale-grid {
    grid-template-columns: 5fr 7fr;
    align-items: center;
    gap: 2.25rem;
  }

  .page-about .features-grid {
    grid-template-columns: 7fr 4fr;
    align-items: center;
    gap: 2.5rem;
  }

  .page-about .feature-item {
    padding: 1.3rem 0;
  }

  .page-about .data-table th,
  .page-about .data-table td {
    padding: 0.95rem 0.85rem;
  }
}