.page-about {
  --about-gutter: clamp(20px, 5vw, 4rem);
  --about-max: 1200px;
  --timeline-rail: 48px;
  background-color: var(--color-cream);
  background-image:
    linear-gradient(rgba(26, 58, 47, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(26, 58, 47, 0.04) 1px, transparent 1px);
  background-size: 24px 24px;
  color: var(--color-gray);
  font-family: var(--font-body);
  line-height: 1.75;
  overflow-x: hidden;
}

.page-about__wrap {
  max-width: var(--about-max);
  margin: 0 auto;
  padding: 1.5rem var(--about-gutter) 5rem;
}

.page-about__breadcrumb {
  margin-bottom: 1.5rem;
  font-size: 0.875rem;
}

.page-about__cover {
  margin-bottom: 3.5rem;
}

.page-about__cover::before {
  content: "";
  display: block;
  width: 72px;
  height: 6px;
  background: var(--color-terracotta);
  margin-bottom: 1.25rem;
}

.page-about__cover-inner {
  display: grid;
  gap: 1.75rem;
}

.page-about__cover-kicker {
  margin: 0 0 0.5rem;
  font-family: var(--font-accent);
  font-size: 0.875rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-terracotta);
}

.page-about__cover h1 {
  margin: 0 0 1rem;
  font-family: var(--font-heading);
  font-size: clamp(2rem, 7vw, 3.5rem);
  font-weight: 900;
  line-height: 1.22;
  color: var(--color-teal);
  border-left: var(--border-thick) solid var(--color-gold);
  padding-left: 1rem;
}

.page-about__cover-lead {
  margin: 0 0 0.75rem;
  font-family: var(--font-heading);
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-earth);
}

.page-about__cover-desc {
  margin: 0 0 1.25rem;
  max-width: 48ch;
  font-size: 0.9375rem;
}

.page-about__cover-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.page-about__cover-media {
  margin: 0;
  border: 4px solid var(--color-ink);
  box-shadow: 10px 10px 0 var(--color-gold);
  background: var(--color-ink);
}

.page-about__cover-media img,
.page-about__timeline-figure img,
.page-about__philosophy-media img {
  width: 100%;
  height: auto;
  display: block;
}

.page-about__cover-caption {
  padding: 0.5rem 0.75rem;
  font-family: var(--font-accent);
  font-size: 0.8125rem;
  color: var(--color-cream);
}

.page-about__chapter-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
  margin-bottom: 3rem;
  padding: 0.5rem;
  background: var(--color-pale-teal);
  border: 3px solid var(--color-ink);
  box-shadow: var(--shadow-standard);
}

.page-about__chapter-nav a {
  padding: 0.35rem 0.625rem;
  font-family: var(--font-heading);
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--color-teal);
  text-decoration: none;
  border: 2px solid transparent;
}

.page-about__chapter-nav a span {
  margin-right: 0.35em;
  font-family: var(--font-accent);
  font-size: 0.75rem;
  color: var(--color-terracotta);
}

.page-about__chapter-nav a.is-active {
  border-color: var(--color-gold);
  background: var(--color-cream);
}

.page-about__section-head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.5rem 0.75rem;
  margin-bottom: 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 4px solid var(--color-earth);
}

.page-about__section-num {
  font-family: var(--font-accent);
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-terracotta);
}

.page-about__section-head h2 {
  margin: 0;
  font-family: var(--font-heading);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 900;
  color: var(--color-teal);
  line-height: 1.3;
}

.page-about__section-tag {
  margin-left: auto;
}

.page-about__origin {
  margin-bottom: 4.5rem;
  padding: clamp(1.25rem, 4vw, 2.5rem);
  background: var(--color-pale-teal);
  border: 4px solid var(--color-ink);
  box-shadow: var(--shadow-standard);
}

.page-about__origin-layout {
  display: grid;
  gap: 1.25rem;
}

.page-about__origin-body p {
  margin: 0 0 1rem;
  font-size: 0.9375rem;
}

.page-about__origin-body p:last-child {
  margin-bottom: 0;
}

.page-about__origin-quote {
  margin: 1.5rem 0;
  padding: 1rem 1.25rem;
  border-left: 4px solid var(--color-gold);
  background: var(--color-cream);
  font-family: var(--font-heading);
  font-size: 1.125rem;
  font-weight: 700;
  line-height: 1.6;
  color: var(--color-teal);
}

.page-about__origin-quote p {
  margin: 0;
}

.page-about__origin-note {
  justify-self: start;
  padding: 0.5rem 0.75rem;
  border: 2px dashed var(--color-earth);
  font-family: var(--font-accent);
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--color-earth);
}

.page-about__milestones {
  margin-bottom: 4.5rem;
}

.page-about__timeline-figure {
  margin: 0 0 2.5rem;
  border: 4px solid var(--color-ink);
  box-shadow: 8px 8px 0 var(--color-earth);
  background: var(--color-ink);
}

.page-about__timeline-figure figcaption {
  padding: 0.5rem 0.75rem;
  font-family: var(--font-accent);
  font-size: 0.8125rem;
  color: var(--color-cream);
}

.page-about__timeline {
  position: relative;
  padding-left: var(--timeline-rail);
}

.page-about__timeline::before {
  content: "";
  position: absolute;
  left: 20px;
  top: 0.5rem;
  bottom: 0.5rem;
  width: 4px;
  background: var(--color-earth);
  border-radius: 2px;
}

.page-about__milestone {
  position: relative;
  margin-bottom: 1.75rem;
}

.page-about__milestone:last-child {
  margin-bottom: 0;
}

.page-about__milestone-marker {
  position: absolute;
  left: -34px;
  top: 0.5rem;
  width: 16px;
  height: 16px;
  transform: rotate(45deg);
  background: var(--color-gold);
  border: 3px solid var(--color-ink);
}

.page-about__milestone-marker--current {
  background: var(--color-terracotta);
}

.page-about__milestone-year {
  margin: 0 0 0.5rem;
  font-family: var(--font-heading);
  font-size: clamp(2rem, 8vw, 3.25rem);
  font-weight: 900;
  line-height: 1;
  color: var(--color-teal);
}

.page-about__milestone-card {
  border: 3px solid var(--color-ink);
  background: var(--color-cream);
  box-shadow: var(--shadow-standard);
}

.page-about__milestone-card summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem 0.75rem;
  padding: 0.875rem 1rem;
  cursor: pointer;
  list-style: none;
}

.page-about__milestone-card summary::-webkit-details-marker {
  display: none;
}

.page-about__milestone-card summary::after {
  content: "＋";
  font-family: var(--font-accent);
  font-size: 1.125rem;
  color: var(--color-terracotta);
}

.page-about__milestone-card[open] summary::after {
  content: "－";
}

.page-about__milestone-card summary h3 {
  margin: 0;
  font-family: var(--font-heading);
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-teal);
}

.page-about__milestone-card summary span {
  font-size: 0.8125rem;
  color: var(--color-gray);
}

.page-about__milestone-card[open] summary {
  border-bottom: 2px solid var(--color-pale-teal);
}

.page-about__milestone-detail {
  padding: 1rem;
  border-top: 2px solid var(--color-pale-teal);
}

.page-about__milestone-detail p {
  margin: 0;
  font-size: 0.875rem;
}

.page-about__philosophy {
  margin-bottom: 4rem;
  padding: clamp(1.5rem, 5vw, 3rem);
  background: var(--color-teal);
  border: 4px solid var(--color-ink);
  box-shadow: var(--shadow-strong);
  color: var(--color-cream);
}

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

.page-about__philosophy-text .page-about__section-head {
  border-bottom-color: var(--color-gold);
}

.page-about__philosophy-text .page-about__section-head h2 {
  color: var(--color-cream);
}

.page-about__philosophy-text .page-about__section-tag {
  border-color: var(--color-gold);
  background: var(--color-gold);
  color: var(--color-ink);
}

.page-about__philosophy-lead {
  margin: 0 0 1.25rem;
  font-family: var(--font-heading);
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--color-gold);
}

.page-about__philosophy-list {
  list-style: none;
  margin: 0 0 1.5rem;
  padding: 0;
  display: grid;
  gap: 1rem;
}

.page-about__philosophy-list li {
  padding: 1rem 1.25rem;
  border-left: 4px solid var(--color-gold);
  background: rgba(244, 239, 231, 0.08);
}

.page-about__philosophy-index {
  display: block;
  margin-bottom: 0.25rem;
  font-family: var(--font-accent);
  font-size: 0.8125rem;
  color: var(--color-terracotta);
}

.page-about__philosophy-list h3 {
  margin: 0 0 0.5rem;
  font-family: var(--font-heading);
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-cream);
}

.page-about__philosophy-list p {
  margin: 0;
  font-size: 0.875rem;
  color: rgba(244, 239, 231, 0.85);
}

.page-about__philosophy-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.page-about__philosophy-media {
  margin: 0;
  align-self: center;
  border: 6px solid var(--color-gold);
  background: var(--color-cream);
  box-shadow: 8px 8px 0 rgba(27, 28, 27, 0.35);
}

.page-about__philosophy-media figcaption {
  padding: 0.5rem 0.75rem;
  font-family: var(--font-accent);
  font-size: 0.8125rem;
  text-align: center;
  color: var(--color-teal);
}

.page-about__closing {
  padding: 2.5rem 1.25rem;
  text-align: center;
  background: var(--color-cream);
  border: 4px solid var(--color-ink);
  box-shadow: var(--shadow-standard);
}

.page-about__closing-kicker {
  margin: 0 0 0.5rem;
  font-family: var(--font-accent);
  font-size: 0.8125rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-terracotta);
}

.page-about__closing h2 {
  margin: 0 0 0.75rem;
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 900;
  color: var(--color-teal);
}

.page-about__closing p {
  max-width: 52ch;
  margin: 0 auto 1.25rem;
  font-size: 0.9375rem;
}

.page-about__closing-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
}

@media (min-width: 768px) {
  .page-about__cover-inner {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: center;
    gap: 2.5rem;
  }

  .page-about__origin-layout {
    grid-template-columns: 1fr auto;
    gap: 2rem;
  }

  .page-about__origin-note {
    justify-self: stretch;
    max-width: 15em;
    writing-mode: vertical-rl;
    border: none;
    border-right: 2px dashed var(--color-earth);
    padding-right: 0.75rem;
    padding-left: 0;
  }

  .page-about__milestone {
    display: grid;
    grid-template-columns: 120px 1fr;
    align-items: start;
    column-gap: 0.5rem;
  }

  .page-about__milestone-year {
    margin-bottom: 0;
  }

  .page-about__philosophy-layout {
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: 2rem;
  }
}

@media (min-width: 992px) {
  .page-about__chapter-nav {
    position: sticky;
    top: 5rem;
    z-index: 200;
  }

  .page-about__cover-inner {
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
  }

  .page-about__philosophy-layout {
    grid-template-columns: minmax(0, 1fr) 340px;
    gap: 3rem;
  }

  .page-about__closing {
    padding: 3.5rem 2rem;
  }
}